ASTM E2126-02a
(Test Method)Standard Test Methods for Cyclic (Reversed) Load Test for Shear Resistance of Framed Walls for Buildings
Standard Test Methods for Cyclic (Reversed) Load Test for Shear Resistance of Framed Walls for Buildings
SCOPE
1.1 These test methods are designed to evaluate the shear stiffness, shear strength, and ductility of a wall assembly, including applicable shear connections and hold-down connectors, under quasi-static cyclic (reversed) load conditions.
1.2 These test methods are intended for wall assemblies constructed from wood or metal framing with solid sheathing or other bracing methods.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
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An American National Standard
Designation:E2126–02a
Standard Test Methods for
Cyclic (Reversed) Load Test for Shear Resistance of Walls
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for Buildings
This standard is issued under the fixed designation E 2126; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope 3.2 Definitions of Terms Specific to This Standard:
3.2.1 ductility factor (µ), n—the ratio of the ultimate dis-
1.1 These test methods are designed to evaluate the shear
placement (D ) and the yield displacement (D ).
u yield
stiffness, shear strength, and ductility of a wall assembly,
3.2.2 envelope curve (see Fig. 1), n—the locus of extremi-
including applicable shear connections and hold-down connec-
ties of the load-displacement hysteresis loops. Initial envelope
tors, under quasi-static cyclic (reversed) load conditions.
curve contains the peak loads from the first cycle of each phase
1.2 These test methods are intended for wall assemblies
of the cyclic loading. Wall displacement in the positive
constructed from wood or metal framing with solid sheathing
direction produces a positive envelope curve; the negative wall
or other bracing methods or structural insulated panels.
displacement produces a negative envelope curve.The positive
1.3 This standard does not purport to address all of the
direction is based on outward movement of the hydraulic
safety concerns, if any, associated with its use. It is the
actuator. The negative direction is based on inward movement
responsibility of the user of this standard to establish appro-
of the actuator.
priate safety and health practices and determine the applica-
3.2.3 equivalent energy elastic-plastic (EEEP) curve (see
bility of regulatory limitations prior to use.
Fig.2),n—anidealelastic-plasticcurvecircumscribinganarea
2. Referenced Documents
equal to the area enclosed by the observed load-displacement
curve or envelope curve between the origin, the ultimate
2.1 ASTM Standards:
displacement, and the displacement axis.The elastic portion of
D 2395 Test Methods for Specific Gravity of Wood and
2
the EEEPcurve contains the origin and has a slope equal to the
Wood-Based Materials
elasticstiffness, k .Theplasticportionisahorizontallineequal
D 4442 TestMethodsforDirectMoistureContentMeasure- e
2
to P determined by the following equation:
ment of Wood and Wood-Based Materials yield
D 4444 TestMethodsforUseandCalibrationofHand-Held
2A
2
2 P 5 D — D — k (1)
S D
yield u Πu e
Moisture Meters
k
e
E 564 Practice for Static Load Test for Shear Resistance of
3
where:
Framed Walls for Buildings
P = yield load (lbf or N);
yield
E 575 Practice for Reporting Data from Structural Tests of
A = the area (lbf·in. or N·m) under the observed
3
Building Constructions, Connections, and Assemblies
3 load-displacement curve or envelope curve from
E 631 Terminology of Building Constructions
zero to ultimate displacement (D );
u
E 1803 Test Methods for Determining Structural Capacities
k = elastic shear stiffness (lbf/in. or N/m) defined by
4
e
of Insulated Panels
the slope of the secant passing through the origin
and a point on the observed load-displacement
3. Terminology
curve or envelope curve where the load equals 0.4
3.1 For definitions of terms used in this standard, see
P .
peak
Terminology E 631.
3.2.4 failure limit state, n—the point in the load-
displacement relationship corresponding to the last data point
1
These test methods are under the jurisdiction of ASTM Committee E06 on
with the absolute load equal or greater than 0.8 P .
peak
Performance of Buildings and are the direct responsibility of Subcommittee E06.11
3.2.5 failure load, n—0.8 P .
peak
on Horizontal and Vertical Structures/Structural Performance of Completed Struc-
3.2.6 first major event (FME), n—the first significant limit
tures.
Current edition approved Oct. 10, 2002. Published November 2002 Originally
state to occur (see limit state).
published as E 2126–01. Last previous edition E 2126–02.
3.2.7 limit state, n—an event that marks the demarcation
2
Annual Book of ASTM Standards, Vol 04.10.
between two behavior states, at which time some structural
3
Annual Book of ASTM Standards, Vol 04.11.
4
behavior of the element or system is altered significantly.
Annual Book of ASTM Standards, Vol 04.12.
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E2126–02a
5. Significance and Use
5.1 These test methods are intended to measure the perfor-
mance of walls subjected to earthquake loads. Since these
loads are cyclic, the loading pro
...
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