Seismic Performance Evaluation of Novel Cold-Formed Steel Framed Shear Walls Sheathed with Corrugated Steel Sheets Page: 9
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4.1 Test Setup
Wall shear tests were conducted on a 16 ft. by 13.3 ft. high self-equilibrating steel testing
frame located in the Structural Laboratory at the University of North Texas. The testing frame was
equipped with a MTS 35 kip hydraulic actuator with a 10 in. stroke. A MTS 407 controller and a
20-GPM MTS hydraulic power unit were used to drive the loading system. A 30 kip
TRANSDUCER TECHNIQUES SWO universal compression/tension load cell was used to
measure the forces. One out of five NOVOTECHNIC 10 position transducers were used to
measure the horizontal displacement at the top of the shear wall, and the other four were used to
measure the vertical and horizontal displacements at the bottom of the two boundary frame
members. The data acquisition system consisted of a National Instruments unit and an HP Compaq
computer. 5,384 pounds of gravity load applied on wall was calculated based on the two-story
CFS-NEES office building. This weight was divided into two equal parts and added on each side
of the wall by using weight boxes with sand bags held by steel chains from the top of the shear
wall. Weight boxes were 5 inches off the ground. Contact between weight boxes and shear wall
was eliminated by using a support frame. The applied force and the five displacements were
recorded instantaneously during each test. Details of the testing frame and the location of the
position transducers are shown in Figure 4.1.
The wall specimens were bolted to the base of the testing frame and loaded horizontally at
the top. The base beam is a 5 in. x 5 in. x in. structural steel tube and is bolted to a W16x67
structural steel beam which is anchored to the floor. One web of the base beam has openings in
several locations to provide access of the anchor bolts for the connection of hold-downs to the base
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Lan, Xing. Seismic Performance Evaluation of Novel Cold-Formed Steel Framed Shear Walls Sheathed with Corrugated Steel Sheets, thesis, August 2017; Denton, Texas. (https://digital.library.unt.edu/ark:/67531/metadc1011859/m1/17/: accessed May 26, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; .