ASTM E2126-02
(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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Designation:E2126–02
Standard Test Methods for
Cyclic (Reversed) Load Test for Shear Resistance of Framed
1
Walls 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 (ε) indicates an editorial change since the last revision or reapproval.
1. 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 connec-
tors, 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 appro-
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use.
2. Referenced Documents
2.1 ASTM Standards:
FIG. 1 Observed Hysteresis Curve and Envelope Curves
D 2395 Test Methods for Specific Gravity of Wood and
2
Wood-Based Materials
direction produces a positive envelope curve; the negative wall
D 4442 TestMethodsforDirectMoistureContentMeasure-
displacement produces a negative envelope curve.
2
ment of Wood and Wood-Based Materials
3.1.3 equivalent energy elastic-plastic (EEEP) curve (see
D 4444 TestMethodsforUseandCalibrationofHand-Held
Fig.2),n—anidealelastic-plasticcurvecircumscribinganarea
2
Moisture Meters
equal to the area enclosed by the observed load-displacement
E 564 Practice for Static Load Test for Shear Resistance of
curve or envelope curve between the origin, the ultimate
3
Framed Walls for Buildings
displacement, and the displacement axis.The elastic portion of
E 575 Practice for Reporting Data from Structural Tests of
the EEEPcurve contains the origin and has a slope equal to the
3
Building Constructions, Connections, and Assemblies
elasticstiffness, k .Theplasticportionisahorizontallineequal
e
to P determined by the following equation:
3. Terminology
yield
3.1 Definitions of Terms Specific to This Standard:
2A
2
P 5 D — D — k (1)
S D
yield u Πu e
3.1.1 ductility factor (µ), n—the ratio of the ultimate dis- k
e
placement (∆ ) and the yield displacement (∆ ).
u yield
where:
3.1.2 envelope curve (see Fig. 1), n—the locus of extremi-
P = yield load (lbf or N);
yield
ties of the load-displacement hysteresis loops. Initial envelope
A = the area (lbf·in. or N·m) under the observed
curve contains the peak loads from the first cycle of each phase
load-displacement curve or envelope curve from
of the cyclic loading. Wall displacement in the positive
zero to ultimate displacement (∆ );
u
k = elastic shear stiffness (lbf/in. or N/m) defined by
e
the slope of the secant passing through the origin
1
These test methods are under the jurisdiction of ASTM Committee E06 on
and a point on the observed load-displacement
Performance of Buildings and are the direct responsibility of Subcommittee E06.11
curve or envelope curve where the load equals 0.4
on Horizontal and Vertical Structures/Structural Performance of Completed Struc-
tures.
P .
peak
Current edition approved April 10, 2002. Published July 2002 Last previous
3.1.4 failure limit state, n—the point in the load-
edition E 2126–01. Originally published as E 2126–01.
2
displacement relationship corresponding to the last data point
Annual Book of ASTM Standards, Vol 04.10.
3
Annual Book of ASTM Standards, Vol 04.11. with the absolute load equal or greater than 0.8 P .
peak
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E2126–02
to conform with 6.2. Elements used to construct wall assem-
blies may be varied to permit anticipated failure of selected
elements. Frameless wall assemblies are also permitted to be
tested under the guidelines of these test methods.
6.2 Connections—The performance of framed walls is in-
fluenced by the type, spacing and edge distance of fasteners
attaching sheathing to framing and spacing of the shear
connections and hold-down connectors to the rigid base.All of
these connections shall be consistent with the types used in
actual building connections.
6.3 Frame Requirements—The frame of the wall assembly
shall consist of materials representative of those to be used in
the actual building construction. The connections of these
members shall be consistent with those intended in actual
building construction.
FIG. 2 Performance Parameters of Shear-Wall Assembly 6.
...
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