SIST EN 13381-6:2012
(Main)Test methods for determining the contribution to the fire resistance of structural members - Part 6: Applied protection to concrete filled hollow steel columns
Test methods for determining the contribution to the fire resistance of structural members - Part 6: Applied protection to concrete filled hollow steel columns
This European Standard specifies a test method for determining the contribution of fire protection systems to the fire resistance of structural concrete filled hollow steel columns. The concrete can be lightweight, normalweight or heavyweight concrete, and of all the strength classes provided for in EN 1994-1-2. The use of a dry sand is considered to be an alternative, conservative approach to the use of wet concrete. A specification for dry sand is given in 5.6.3. The method is applicable to all fire protection systems used for the protection of concrete filled hollow columns and includes sprayed fire protection, reactive coatings, cladding protection systems and multi-layer or composite fire protection materials. If there is no hollow section data from prEN 13381-4 (revision of ENV 13381-4:2002) or prEN 13381-8 (revision of EN 13381-8:2010), this European Standard cannot be used. For passive systems, this data can be derived using the Formula in Annex A of prEN 13381-4 (revision of ENV 13381-4:2002). Testing to this European Standard is not required if the fire protection thicknesses for hollow sections derived from prEN 13381-4 (revision of ENV 13381-4:2002) or prEN 13381-8 (revision of EN 13381-8:2010) are to be used for concrete filled hollow sections. The evaluation is designed to cover a range of thicknesses of the applied fire protection material, a range of steel sections, characterized by their diameters and wall thicknesses, a range of design temperatures and a range of valid fire protection classification periods. The test method is applicable to fire protection systems which are intimately in contact with the structural column, or which include an airspace between the structural column and the protection system. This European Standard specifies the fire tests which are carried out to determine the ability of the fire protection system to provide fire protection to composite columns. The tests produce data on the average steel temperatures of the composite column, when exposed to the time/temperature curve according to the procedures defined herein. This European Standard also provides the assessment procedure, which prescribes how the analysis of the test data should be made and gives guidance on the procedures by which interpolation is undertaken. In special circumstances, where specified in national building regulations, there can be a need to subject reactive protection material to a smouldering curve. The test for this and the special circumstances for its use are detailed in prEN 13381-8 (revision of EN 13381-8:2010). This exposure, applicable to reactive fire protection materials, is used only in special circumstances (which are specified in the national building regulations of a member state of the European Union) and is therefore not intended to be mandatory for all fire protection materials applied to concrete filled hollow steel columns. This European Standard ignores any contribution from the concrete to the structural capability of the hollow column and therefore only deals with thermal performance. The justification for using this approach is given in Annex B. The fire test methodology makes provision for the collection and presentation of data which can be used as direct input to the calculation of fire resistance of concrete/steel composite members in accordance with the procedures given in EN 1994-1-2.
Prüfverfahren zur Bestimmung des Beitrages zum Feuerwiderstand von tragenden Bauteilen - Teil 6: Brandschutzmaßnahmen für betonverfüllte Stahlverbund-Hohlstützen
Diese Europäische Norm legt ein Prüfverfahren zur Bestimmung des Beitrags von Brandschutzsystemen zur Feuerwiderstandsfähigkeit von tragenden betonverfüllten Stahlverbund-Hohlstützen fest. Der Beton kann Leichtbeton, Normalbeton oder Schwerbeton aller in EN 1994 1 2 angegebenen Festigkeitsklassen sein. Alternativ wird die Verwendung von trockenem Sand als konservativer Ansatz gegenüber der Verwendung von Frischbeton betrachtet. Eine Spezifikation des trockenen Sandes ist in 5.6.3 angegeben.
Das Verfahren gilt für alle Brandschutzsysteme, die für den Schutz von betonverfüllten Stahlverbund Hohlstützen verwendet werden, und beinhaltet aufgesprühte Brandschutzmaterialien, reaktive Ummantelungen, Beschichtungsschutzsysteme und Mehrschicht- oder Verbund-Brandschutzmaterialien.
Wenn keine Hohlprofilangaben nach prEN 13381 4 oder EN 13381 8 vorliegen, kann diese Europäische Norm nicht angewendet werden. Für passive Brandschutzsysteme können diese Angaben mithilfe der Gleichung in Anhang A von prEN 13381 4 hergeleitet werden.
Eine Prüfung nach dieser Europäischen Norm ist nicht erforderlich, wenn die aus prEN 13381 4 oder EN 13381 8 abgeleiteten Dicken des Brandschutzmaterials für Hohlprofile für betonverfüllte Hohlprofile angewendet werden sollen.
Die Beurteilung ist so ausgelegt, dass ein Bereich von Dicken des aufgebrachten Brandschutzmaterials, ein Bereich von Stahlprofilen, die durch ihre Durchmesser und Wanddicken gekennzeichnet sind, ein Bereich von Bemessungstemperaturen und ein Bereich gültiger Brandschutz-Klassifizierungszeiten abgedeckt wird.
Das Prüfverfahren gilt für Brandschutzsysteme, die direkt mit der tragenden Stütze in Berührung stehen, oder bei denen zwischen der tragenden Stütze und dem Brandschutzsystem ein Hohlraum vorhanden ist.
Diese Europäische Norm legt die Brandprüfungen fest, die durchzuführen sind, um die Fähigkeit des Brandschutzsystems zu ermitteln, Brandschutz für Verbundstützen zu bieten, und liefert Daten über die mittleren Stahltemperaturen der Verbundstütze, wenn diese der Zeit-Temperatur-Kurve nach den hierin festgelegten Verfahren ausgesetzt wird. Diese Europäische Norm enthält auch das Bewertungsverfahren, in dem festgelegt wird, wie die Analyse der Prüfdaten durchgeführt werden sollte und bietet eine Anleitung bezüglich der Verfahren, mit denen die Interpolation durchzuführen ist.
Unter besonderen Umständen, die in nationalen Bauvorschriften festgelegt sind, kann es erforderlich sein, das reaktive Brandschutzmaterial einer Schwelbrandkurve zu unterziehen. Die diesbezügliche Prüfung und die besonderen Umstände für deren Anwendung sind in EN 13381 8 ausführlich beschrieben. Diese Schwelbrandbeanspruchung, die für reaktive Brandschutzmaterialien gilt, wird nur unter besonderen Umständen, wie sie in den nationalen Bauvorschriften eines Mitgliedstaates der Europäischen Union festgelegt sind, verwendet und ist nicht obligatorisch für alle Brandschutzmaterialien, die für betonverfüllte Stahlverbund-Hohlstützen angewendet werden.
Diese Europäische Norm berücksichtigt nicht den möglichen Beitrag des Betons zur statischen Festigkeit der Hohlstütze und behandelt daher ausschließlich die wärmetechnische Leistungsfähigkeit. Die Begründung für diesen Ansatz ist Anhang B zu entnehmen.
Die Methodologie der Brandprüfung gibt die Möglichkeit, Messwerte zu erfassen und darzustellen, die direkt als Eingangswerte zur Berechnung des Feuerwiderstandes von Beton-/Stahl-Verbundbauteilen entsprechend den Verfahren nach EN 1994-1-2 verwendet werden können.
Die Grenzen der Anwendbarkeit der Ergebnisse aus der Beurteilung der Brandprüfung sind zusammen mit dem zulässigen direkten Anwendungsbereich der Ergebnisse auf unterschiedliche Stahlblech/Be-ton Verbundstützen, Stahlarten und Dicken, Betondichten, Festigkeiten, Dicken und Herstellungstechniken über den Dickenbereich des geprüften verwendeten Brandschutzsystems festgelegt.
Méthodes d'essai pour déterminer la contribution à la résistance au feu des éléments de construction — Partie 6 : Protection appliquée aux poteaux métalliques creux remplis de béton
La présente Norme européenne spécifie une méthode d’essai permettant de déterminer la contribution apportée par les systèmes de protection au feu à la résistance au feu des poteaux métalliques creux remplis de béton. Le béton peut être de type léger, normal ou compact et appartenir aux classes de résistance aux contraintes prévues dans l’EN 1994-1-2. L’utilisation d’un sable sec est considérée comme une approche alternative sécuritaire à l’utilisation de béton humide. Une spécification pour le sable sec est donnée en 5.6.3.
La méthode d’essai est applicable à tous les systèmes de protection au feu utilisés pour protéger les poteaux creux remplis de béton et englobe les matériaux de protection au feu appliqués par pulvérisation, les revêtements réactifs, les systèmes de protection en plaque et les matériaux de protection au feu multicouches ou composites.
La présente Norme européenne ne peut pas être utilisée en l’absence de données relatives aux tronçons creux dans le prEN 13381-4 (révision de l’ENV 13381-4 :2002) ou le prEN 13381-8 (révision de l’EN 13381 8 :2010). Pour les systèmes passifs, ces données peuvent être calculées à l’aide de la formule de l’Annexe A du prEN 13381-4 (révision de l’ENV 13381-4 :2002).
Il n’est pas nécessaire de réaliser les essais selon la présente Norme européenne si les épaisseurs de protection au feu des tronçons creux issues du prEN 13381-4 (révision de l’ENV 13381-4 :2002) ou du prEN 13381-8 (révision de l’EN 13381 8 :2010) vont être utilisées pour les tronçons creux remplis de béton.
L’évaluation est conçue pour couvrir une plage d’épaisseurs du matériau de protection au feu appliqué, une plage de tronçons d’acier, caractérisées par leurs diamètres et épaisseurs de paroi, une plage de températures de calcul et une plage de durées de classification des protections au feu en cours de validité.
La méthode d’essai est applicable aux systèmes de protection au feu qui se trouvent en étroit contact avec le poteau ou qui comprennent un espace d’air entre le poteau et le système de protection.
La présente Norme européenne spécifie les essais au feu menés à bien pour déterminer l’aptitude du système de protection au feu à fournir une protection au feu aux poteaux mixtes. Les essais produisent des données concernant les températures moyennes de l’acier du poteau mixte, lorsque ce poteau est exposé au feu suivant la courbe de température/temps, conformément aux procédures définies dans le présent document. La présente Norme européenne contient également le mode opératoire d’évaluation qui prescrit la façon dont il convient d’effectuer l’analyse des données d’essai et les lignes directrices des modes opératoires selon lesquels une interpolation est entreprise.
Dans des cas particuliers, tels que spécifiés dans la réglementation nationale de la construction, il peut s’avérer nécessaire de soumettre le matériau de protection réactif à une courbe de feu couvant. Ce type d’essai et les cas particuliers pour son utilisation sont décrits dans le prEN 13381-8 (révision de l’EN 13381 8 :2010). Cette exposition au feu, applicable aux matériaux de protection au feu de type réactif, n’est utilisée que dans des cas particuliers, spécifiés dans la réglementation nationale de la construction d’un État membre de l’Union Européenne. Par conséquent, elle n’est pas destinée à devenir obligatoire pour tous les matériaux de protection au feu appliqués aux poteaux métalliques creux remplis de béton.
La présente Norme européenne ignore toute contribution du béton à la capacité structurelle du poteau creux et ne traite donc que des performances thermiques. La justification de l’utilisation de cette approche est donnée à l’Annexe B.
Preskusne metode za ugotavljanje prispevka k požarni odpornosti konstrukcijskih elementov - 6. del: Zaščita votlih jeklenih stebrov s polnilom iz betona
Ta evropski standard določa preskusno metodo za ugotavljanje prispevka sistemov protipožarnega varstva k požarni odpornosti konstrukcijskih votlih jeklenih stebrov s polnilom iz betona. Beton je lahko lahek, normalen ali težek in katerega koli razreda trdnosti, navedenega v standardu EN 1994-1-2. Poleg konzervativnega pristopa – uporabe mokrega betona, obstaja tudi možnost uporabe suhega peska. Specifikacija za suhi pesek je navedena v 5.6.3. Ta metoda velja za vse sisteme protipožarnega varstva, ki se uporabljajo za zaščito votlih jeklenih stebrov s polnilom iz betona, in vključuje protipožarno varnost z razprševanjem, reaktivne premaze, zaščitne sisteme fasadnih oblog in večplastne oziroma kompozitne protipožarne materiale. Tega evropskega standarda ni mogoče uporabiti, če ni podatkov o votlih profilih iz standarda prEN 13381-4 (revizija standarda ENV 13381-4:2002) ali prEN 13381-8 (revizija standarda EN 13381-8:2010). Za pasivne sisteme je mogoče ta podatek izpeljati iz formule v Prilogi A standarda prEN 13381-4 (revizija ENV 13381-4:2002). Če se bodo za profile votlih jeklenih stebrov s polnilom iz betona uporabile debeline za votle profile, izpeljane iz standarda prEN 13381-4 (revizija standarda ENV 13381-4:2002) ali prEN 13381-8 (revizija standarda EN 13381-8:2010), preskušanje v skladu s tem evropskim standardom ni zahtevano. Predvideno je, da ugotavljanje krije obseg debelin uporabljenega protipožarnega materiala, obseg jeklenih profilov z njihovimi premeri in debelinami sten, obseg načrtovanih temperatur in obseg obdobij veljavne razvrstitve protipožarne zaščite. Preskusna metoda je veljavna za protipožarne sisteme, ki so neposredno v stiku s konstrukcijskim stebrom ali pri katerih je med konstrukcijskim stebrom in zaščitnim sistemom zračni prostor. Ta evropski standard določa preskuse požarne varnosti za določanje zmogljivosti protipožarnega sistema pri zagotavljanju protipožarne zaščite kompozitnih stebrov. S preskusi se zagotovijo podatki o povprečnih temperaturah jekla v kompozitnem stebru, ko je izpostavljeno krivulji čas-temperatura v skladu s postopki, opredeljenimi v tem dokumentu. Ta evropski standard prav tako vsebuje postopek presoje, ki predpisuje način analiziranja podatkov preskusa, in navodila o postopkih, ki se nanašajo na interpolacijo. V posebnih okoliščinah, kadar so opredeljene v nacionalnih gradbenih predpisih, lahko obstaja potreba, da se reaktivni material za zaščito podvrže krivulji tlenja. Preskus za to in posebne okoliščine za njegovo uporabo so podrobno opredeljeni v standardu prEN 13381-8 (revizija standarda EN 13381-8:2010). Ta izpostavljenost, ki velja za reaktivne protipožarne materiale, se uporablja samo v posebnih okoliščinah (ki so opredeljene v nacionalnih gradbenih predpisih države članice Evropske unije) in zato ni obvezna za vse protipožarne materiale, ki se uporabljajo za votle jeklene stebre s polnilom iz betona. Ta evropski standard ne obravnava prispevka betona h konstrukcijski trdnosti votlih stebrov in tako obravnava samo toplotno obnašanje. Utemeljitev uporabe tega pristopa je navedena v Prilogi B. Metodologija preskusa požarne varnosti vključuje zbiranje in predstavitev podatkov, ki se lahko neposredno vnesejo v izračun požarne odpornosti kompozitnih elementov iz betona/jekla v skladu s postopki, navedenimi v standardu EN 1994-1-2.
General Information
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Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.RQVWUXNFLMVNLKPrüfverfahren zur Bestimmung des Beitrages zum Feuerwiderstand von tragenden Bauteilen - Teil 6: Brandschutzmaßnahmen für betonverfüllte Stahlverbund-HohlstützenMéthodes d'essai pour déterminer la contribution à la résistance au feu des éléments de construction — Partie 6 : Protection appliquée aux poteaux métalliques creux remplis de bétonTest methods for determining the contribution to the fire resistance of structural members - Part 6: Applied protection to concrete filled hollow steel columns91.080.01Gradbene konstrukcije na splošnoStructures of buildings in general13.220.50Požarna odpornost gradbenih materialov in elementovFire-resistance of building materials and elementsICS:Ta slovenski standard je istoveten z:EN 13381-6:2012SIST EN 13381-6:2012en,fr,de01-november-2012SIST EN 13381-6:2012SLOVENSKI
STANDARD
SIST EN 13381-6:2012
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 13381-6
June 2012 ICS 13.220.50 Supersedes ENV 13381-6:2002English Version
Test methods for determining the contribution to the fire resistance of structural members - Part 6: Applied protection to concrete filled hollow steel columns
Méthodes d'essai pour déterminer la contribution à la résistance au feu des éléments de construction - Partie 6: Protection appliquée aux poteaux métalliques creux remplis de béton
Prüfverfahren zur Bestimmung des Beitrages zum Feuerwiderstand von tragenden Bauteilen - Teil 6: Brandschutzmaßnahmen für betonverfüllte Stahlverbund-Hohlstützen This European Standard was approved by CEN on 14 April 2012.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre:
Avenue Marnix 17,
B-1000 Brussels © 2012 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 13381-6:2012: ESIST EN 13381-6:2012
EN 13381-6:2012 (E) 2 Contents Page Foreword .41 Scope .62 Normative references .83 Terms and definitions, symbols and units .84 Test equipment . 104.1 General . 104.2 Furnace . 105 Test conditions . 105.1 General . 105.2 Support
conditions . 115.3 Number of test specimens . 115.4 Size of test specimens . 115.5 Construction of steel test specimens . 115.5.1 Short and tall concrete filled hollow columns . 115.5.2 Application of the fire protection material . 115.6 Composition of test specimen component materials . 115.6.1 Steel specification . 115.6.2 Concrete grade . 125.6.3 Dry sand . 125.7 Properties of test specimen component materials . 125.7.1 Fire protection materials - General . 125.7.2 Fire protection materials - Thickness of applied reactive protection material . 125.8 Selection of test specimens - Principle of selection . 126 Installation of the test specimens . 136.1 Test specimen installation patterns. 136.2 Furnace Load . 136.3 Specimen mounting. 137 Conditioning of the test specimens . 138 Application of instrumentation . 148.1 General . 148.2 Instrumentation for measurement and control of furnace temperature . 148.2.1 General . 148.2.2 Furnace temperature in the region of test specimens . 148.2.3 Instrumentation for the measurement of steel temperatures . 148.3 Instrumentation for the measurement of pressure . 149 Test procedure . 149.1 General . 149.2 Furnace temperature and pressure . 149.3 Temperature of steelwork . 159.4 Observations . 159.5 Termination of test. 1510 Test results . 1510.1 Acceptability of test results . 1510.2 Presentation of test results in the test report . 1511 Assessment . 1611.1 General . 16SIST EN 13381-6:2012
EN 13381-6:2012 (E) 3 11.2 Assessment procedure for thermal performance . 1612 Report of the assessment. 1613 Limits of the applicability of the results of the assessment . 1713.1 General . 1713.2 Permitted fire protection thickness range . 1713.3 Permitted minimum wall thickness . 1713.4 Permitted maximum wall thickness . 1713.5 Permitted minimum diameter . 1713.6 Permitted maximum diameter . 17Annex A (normative) Linear interpolation analysis . 21Annex B (normative) Application, assumptions and limitations of this European Standard . 23B.1 Structural contribution from the concrete core . 23B.2 Stickability correction . 23B.3 Thermal analysis of circular and rectangular concrete filled hollow sections . 23Bibliography . 24 SIST EN 13381-6:2012
EN 13381-6:2012 (E) 4 Foreword This document (EN 13381-6:2012) has been prepared by Technical Committee CEN/TC 127 “Fire safety in buildings”, the secretariat of which is held by BSI. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by December 2012, and conflicting national standards shall be withdrawn at the latest by December 2012. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights. This document supersedes ENV 13381-6:2002. ENV 13381-6:2002 has been revised and a completely new document, EN 13381-6, has been prepared. The main differences are as follows: a) Loaded column omitted, since this European Standard provides thermal data only; b) Unfilled sections are required to be tested under EN 13381-8 or ENV 13381-4; c) The use of a specified dry sand infill to the sections may be used as an alternative to concrete; d) Thermocouple positions redefined to follow the requirements of EN 13381-8 or ENV 13381-4; e) New matrix of test sections included based on scope required rather than prescriptive testing; f) Method to correct data for stickability added; g) Method of analysing the thermal data simplified to a method using linear interpolation; h) Extension of the results of testing added. This European Standard is compatible with prEN 13381-4 (revision of ENV 13381-4:2002) and prEN 13381-8 (revision of EN 13381-8:2010). This European Standard is one of a series of standards for evaluating the contribution to the fire resistance of structural members by applied fire protection materials. The other parts of this series are: Part 1: Horizontal protective membranes. Part 2: Vertical protective membranes. Part 3: Applied protection to concrete members. Part 4: Applied protection to steel members.
Part 5: Applied protection to concrete/profiled sheet steel and composite members. Part 7: Applied protection to timber members. Part 8: Applied reactive protection to steel members.
SIST EN 13381-6:2012
EN 13381-6:2012 (E) 5 Caution The attention of all persons concerned with managing and carrying out this fire resistance test is drawn to the fact that fire testing can be hazardous and that there is a possibility that toxic and/or harmful smoke and gases will be produced during the test. Mechanical and operational hazards can also arise during the construction of test elements or structures, their testing and the disposal of test residues. An assessment of all potential hazards and risks to health should be made and safety precautions should be identified and provided. Written safety instructions should be issued.
Appropriate training should be given to relevant personnel. Laboratory personnel should ensure that they follow written safety instructions at all times. The specific health and safety instructions contained within this European Standard should be followed. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.
SIST EN 13381-6:2012
EN 13381-6:2012 (E) 6
1 Scope This European Standard specifies a test method for determining the contribution of fire protection systems to the fire resistance of structural concrete filled hollow steel columns. The concrete can be lightweight, normal-weight or heavyweight concrete, and of all the strength classes provided for in EN 1994-1-2. The use of a dry sand is considered to be an alternative, conservative approach to the use of wet concrete. A specification for dry sand is given in 5.6.3.
The method is applicable to all fire protection systems used for the protection of concrete filled hollow columns and includes sprayed fire protection, reactive coatings, cladding protection systems and multi-layer or composite fire protection materials.
If there is no hollow section data from prEN 13381-4 (revision of ENV 13381-4:2002) or prEN 13381-8 (revision of EN 13381-8:2010), this European Standard cannot be used. For passive systems, this data can be derived using the Formula in Annex A of prEN 13381-4 (revision of ENV 13381-4:2002).
Testing to this European Standard is not required if the fire protection thicknesses for hollow sections derived from prEN 13381-4 (revision of ENV 13381-4:2002) or prEN 13381-8 (revision of EN 13381-8:2010) are to be used for concrete filled hollow sections.
The evaluation is designed to cover a range of thicknesses of the applied fire protection material, a range of steel sections, characterized by their diameters and wall thicknesses, a range of design temperatures and a range of valid fire protection classification periods.
The test method is applicable to fire protection systems which are intimately in contact with the structural column, or which include an airspace between the structural column and the protection system.
This European Standard specifies the fire tests which are carried out to determine the ability of the fire protection system to provide fire protection to composite columns. The tests produce data on the average steel temperatures of the composite column, when exposed to the time/temperature curve according to the procedures defined herein. This European Standard also provides the assessment procedure, which prescribes how the analysis of the test data should be made and gives guidance on the procedures by which interpolation is undertaken. In special circumstances, where specified in national building regulations, there can be a need to subject reactive protection material to a smouldering curve. The test for this and the special circumstances for its use are detailed in prEN 13381-8 (revision of EN 13381-8:2010). This exposure, applicable to reactive fire protection materials, is used only in special circumstances (which are specified in the national building regulations of a member state of the European Union) and is therefore not intended to be mandatory for all fire protection materials applied to concrete filled hollow steel columns.
This European Standard ignores any contribution from the concrete to the structural capability of the hollow column and therefore only deals with thermal performance. The justification for using this approach is given in Annex B.
The fire test methodology makes provision for the collection and presentation of data which can be used as direct input to the calculation of fire resistance of concrete/steel composite members in accordance with the procedures given in EN 1994-1-2.
The limits of applicability of the results of the assessment arising from the fire test are defined together with permitted direct application of the results to different steel/concrete composite columns, steel types and thicknesses, concrete densities, strengths, thicknesses and production techniques over the range of thicknesses of the applied fire protection system tested.
SIST EN 13381-6:2012
EN 13381-6:2012 (E) 7 This European Standard details the fire test procedures, which should be carried out to provide data on the thermal characteristics of the fire protection system, when exposed to the European Standard temperature/time curve specified in EN 1363-1. SIST EN 13381-6:2012
EN 13381-6:2012 (E) 8 The assessment procedure is used to establish: a) on the basis of temperature data derived from testing concrete filled unloaded tall columns and reference columns, a correction factor and any practical constraints on the use of the fire protection system under fire test conditions, (the physical performance);
b) on the basis of the temperature data derived from testing short hollow steel sections filled with concrete, the thermal properties of the fire protection system, (the thermal performance). The limits of applicability of the results of the assessment arising from the fire test are defined, together with permitted direct application of the results to different steel sections and grades and to the fire protection system. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 206-1, Concrete — Part 1: Specification, performance, production and conformity EN 1992-1-1 Eurocode 2: Design of concrete structures — Part 1-1: General rules and rules for buildings EN 1363-1:2012, Fire resistance tests — Part 1: General requirements EN 10025-1, Hot rolled products of structural steels — Part 1: General technical delivery conditions EN 10210-1 Hot finished structural hollow sections of non-alloy and fine grain steels — Part 1: Technical delivery conditions EN 10210-2: Hot finished structural hollow sections of non-alloy and fine grain steels — Part 2: Tolerances, dimensions and sectional properties EN 10219-2 Cold formed welded structural hollow sections of non-alloy and fine grain steels — Part 2: Tolerances, dimensions and sectional properties ENV 13381-4:2002, Test methods for determining the contribution to the fire resistance of structural members — Part 4: Applied passive protection products to steel members EN 13381-8:2010, Test methods for determining the contribution to the fire resistance of structural members — Part 8: Applied reactive protection to steel members EN ISO 13943, Fire safety — Vocabulary (ISO 13943) ISO 8421-2, Fire protection — Vocabulary — Part 2: Structural fire protection
3 Terms and definitions, symbols and units 3.1 Terms and definitions For the purposes of this document, the terms and definitions given in EN 1363-1, EN ISO 13943 and
ISO 8421-2, and the following apply: SIST EN 13381-6:2012
EN 13381-6:2012 (E) 9 3.1.1
steel member element of building construction which is load-bearing and fabricated from steel Note 1 to entry: For the purpose of this document, the steel used in the testing should be of the same type. 3.1.2
reactive fire protection material reactive materials which are specifically formulated to provide a chemical reaction upon heating such that their physical form changes and, in so doing, provides fire protection by thermal insulative and cooling effects 3.1.3
passive fire protection material materials which do not change their physical form during heating and therefore provide protection by virtue of their physical or thermal properties Note 1 to entry: These may include materials containing water which, during heating, evaporates to produce cooling effects. 3.1.4
fire protection system fire protection material together with any supporting system including mesh reinforcement as tested and a specified primer and top coat if applicable 3.1.5
fire protection protection afforded to the steel member by the fire protection system such that the temperature of the steel member is limited throughout the period of exposure to fire 3.1.6
test specimen steel test section plus the fire protection system under test Note 1 to entry: The steel test section, representative of a steel member, for the purposes of this test, comprises short steel columns, or beams. 3.1.7
fire protection
thickness
thickness of a single layer fire protection system or the combined thickness of all layers of a multi-layer fire protection system or the mean dry film thickness of the fire protection coating, excluding primer and top coat Note 1 to entry: The thickness of the elements of the supporting system or joint cover strips are not included in the fire protection thickness.
3.1.8
stickability
ability of a fire protection material to remain sufficiently coherent and in position throughout a well defined range of deformations, furnace and steel temperatures, such that its ability to provide fire protection is not significantly impaired
3.1.9
characteristic steel temperature temperature of the concrete filled hollow columns which is used for the determination of the correction factor for stickability calculated as (mean temperature + maximum temperature)/2
SIST EN 13381-6:2012
EN 13381-6:2012 (E) 10 3.1.10
design temperature
temperature of a steel structural member for structural design purposes
3.1.11
average steel temperature overall mean temperature to be used as input data for the analysis and calculated for concrete filled hollow section columns as the sum of the means of each measuring station
3.2 Symbols and units
dp is the interpolated protection thickness for time, t dpw is the interpolated
protection thickness for wall thickness, W dmin is minimum protection thickness dint is intermediate protection thickness tmin is the time to reach the specified temperature for sections with the minimum protection thickness tint is the time to reach the specified temperature for sections with the intermediate protection thickness t is the required fire performance period Wmin is the minimum wall thickness Wint is the intermediate wall thickness W is the required wall thickness 4 Test equipment 4.1 General The furnace and test equipment shall conform to that specified in EN 1363-1. 4.2 Furnace The furnace shall permit the dimensions of the test specimens to be exposed to heating, as specified in Clause 6 and their installation upon or within the test furnace to be as specified in Clause 7. 5 Test conditions
5.1 General A number of short steel, concrete filled hollow test sections, protected by the fire protection system, are heated in a furnace according to the protocol given in EN 1363-1. It is recommended that the tests be continued until the steel temperature reaches the maximum value commensurate with application of the data. Where several test specimens are tested simultaneously, care shall be taken that each is adequately and similarly exposed to the specified test conditions. SIST EN 13381-6:2012
EN 13381-6:2012 (E) 11 The procedures given in EN 1363-1 shall be followed in the performance of this test unless specific contrary instructions are given in this European Standard. 5.2 Support
conditions Unloaded concrete filled hollow column sections shall be supported vertically within the furnace stood on the furnace floor (directly or on plinths). 5.3 Number of test specimens The test sections shall be chosen to suit the scope of the assessment. Depending upon the scope of the assessment, the principle of selecting the sections shall be based on the details presented in Clause 6. 5.4 Size of test specimens The short unloaded hollow columns shall have a minimum height of 1000 mm. 5.5 Construction of steel test specimens 5.5.1 Short and tall concrete filled hollow columns A 5 mm steel plate of at least the overall cross sectional dimensions of the fire protection system, but not exceeding 50 mm greater than the overall cross sectional dimensions of the fire protection system, shall be welded to the base of each column. The plate shall incorporate a vent/drain hole within the central area of the specimen of approximately 20 mm diameter. Where dry sand is used as an alternative to concrete, the vent hole shall not be required (see Figure 1). For reactive coatings, a steel ring shall be welded around the neck of the top of the columns to leave the top open after filling with concrete and also enable the application of reactive coatings while the concrete is curing (see Figure 1). The steel ring should overlap the edge of the column for 25 mm and be of sufficient size so that 90 % of its cross section remains open (see Figure 1). For passive fire protection materials the ring is not required and the column may be left open. Threaded rods may be fixed at the inside of the steel column for lifting and for fixing of the insulation material. Insulation board or similar shall be provided to minimize heat transfer to the top of the column sections. At elevated temperatures, such board is capable of providing equivalent or greater insulation than that of the fire protection material provided over the height of the column.
The size of the end protection shall be greater than the total overall dimensions of the fire protection (see Figure 2).
5.5.2 Application of the fire protection material
The surface of the steel shall be prepared and the fire protection system shall be applied to the columns in a manner representative of practice.
5.6 Composition of test specimen component materials 5.6.1 Steel specification The grade of steel used shall be any structural grade (S designation) according to EN 10210-1, EN 10210-2, EN 10025-1 and EN 10219-2. The dimensions and wall thickness of the steel sections shall be measured. SIST EN 13381-6:2012
EN 13381-6:2012 (E) 12 5.6.2 Concrete grade
The concrete in the test specimen shall normally be of type 25/30 to 30/37 (LC/C/HC - (light-weight, normal-weight or heavy-weight concrete) according to EN 206-1 and EN 1992-1-1), although other grades within the strength range 20/25 to 50/60 may be used. The applicability of the results of the assessment arising from the testing of a particular concrete that is not within the above specification shall be restricted to the grade of concrete that was tested. The concrete shall be prepared from calcareous aggregates, of maximum aggregate size of 20 mm, and Portland cement. The composition and properties of the concrete used shall be appropriate to those specified in EN 206-1 and EN 1992-1-1. Other non-calcareous and lower density aggregates may be permitted, but the applicability of the results of the assessment shall be r
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