ASTM E2126-09

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Designation:E2126–09
Standard Test Methods for
Cyclic (Reversed) Load Test for Shear Resistance of Vertical
Elements of the Lateral Force Resisting Systems for
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Buildings
This standard is issued under the fixed designation E2126; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope E631 Terminology of Building Constructions
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2.2 ISO Standard:
1.1 These test methods cover the evaluation of the shear
ISO 16670 Timber Structures—Joints Made with Mechani-
stiffness, shear strength, and ductility of the vertical elements
cal Fasteners—Quasi-static Reversed-cyclic Test Method
of lateral force resisting systems, including applicable shear
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2.3 Other Standards:
connections and hold-down connections, under quasi-static
ANSI/AF&PA NDS National Design Specification for
cyclic (reversed) load conditions.
Wood Construction
1.2 These test methods are intended for specimens con-
structed from wood or metal framing braced with solid
3. Terminology
sheathing or other methods or structural insulated panels.
3.1 For definitions of terms used in this standard, see
1.3 The values stated in inch-pound units are to be regarded
Terminology E631.
as standard. The values given in parentheses are mathematical
3.2 Definitions of Terms Specific to This Standard:
conversions to SI units that are provided for information only
3.2.1 ductility ratio, cyclic (D), n—the ratio of the ultimate
and are not considered standard.
displacement (D ) and the yield displacement (D )ofa
u yield
1.4 This standard does not purport to address all of the
specimen observed in cyclic test.
safety concerns, if any, associated with its use. It is the
3.2.2 elastic shear stiffness (K ) (see 9.1.4, Fig. 1), n—the
e
responsibility of the user of this standard to establish appro-
resistance to deformation of a specimen in the elastic range
priate safety and health practices and determine the applica-
before the first major event (FME) is achieved, which can be
bility of regulatory limitations prior to use.
expressed as a slope measured by the ratio of the resisted shear
2. Referenced Documents load to the corresponding displacement.
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3.2.3 envelope curve (see Fig. 2), n—the locus of extremi-
2.1 ASTM Standards:
ties of the load-displacement hysteresis loops, which contains
D2395 Test Methods for Specific Gravity of Wood and
the peak loads from the first cycle of each phase of the cyclic
Wood-Based Materials
loading and neglects points on the hysteresis loops where the
D4442 Test Methods for Direct Moisture Content Measure-
absolute value of the displacement at the peak load is less than
ment of Wood and Wood-Base Materials
that in the previous phase.
D4444 Test Method for Laboratory Standardization and
3.2.3.1 Discussion—Specimen displacement in the positive
Calibration of Hand-Held Moisture Meters
direction produces a positive envelope curve; the negative
E564 Practice for Static Load Test for Shear Resistance of
specimen displacement produces a negative envelope curve.
Framed Walls for Buildings
The positive direction is based on outward movement of the
E575 Practice for Reporting Data from Structural Tests of
hydraulic actuator.
Building Constructions, Elements, Connections, and As-
3.2.4 envelope curve, average (see Fig. 3), n—envelope
semblies
curve obtained by averaging the absolute values of load and
displacement of the corresponding positive and the negative
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These test methods are under the jurisdiction of ASTM Committee E06 on
envelope points for each cycle.
Performance of Buildings and are the direct responsibility of Subcommittee E06.11
3.2.5 equivalent energy elastic-plastic (EEEP) curve (see
on Horizontal and Vertical Structures/Structural Performance of Completed Struc-
tures.
9.1.4, Fig. 1), n—an ideal elastic-plastic curve circumscribing
Current edition approved April 1, 2009. Published April 2009. Originally
approved in 2001. Last previous edition approved in 2008 as E2126 – 08. DOI:
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10.1520/E2126-09. Available from International Organization for Standardization (ISO), 1, ch. de
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contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM www.iso.ch.
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