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Title: Large-scale seismic testing of knee-brace-frame
Authors: Balendra, T. 
Lim, E.L.
Liaw, C.Y. 
Issue Date: Jan-1997
Source: Balendra, T.,Lim, E.L.,Liaw, C.Y. (1997-01). Large-scale seismic testing of knee-brace-frame. Journal of Structural Engineering 123 (1) : 11-18. ScholarBank@NUS Repository.
Abstract: In a knee-brace-frame (KBF), one end of the brace is connected to a short knee element instead of beam-column joint. The brace provides the required lateral stiffness, whereas the ductility is obtained through shear yielding of the knee element. Large-scale dynamic testing of a KBF with shear yielding knee is described in this paper. When a two-story KBF with rolled I-sections as knee members was subjected to base excitation through pseudo-dynamic testing, inducing a shear strain of 0.1, it was found that the KBF could dissipate a large amount of energy without any pinching in the hysteretic loops or significant deterioration in strength and stiffness provided that the knees are designed to inhibit local and lateral-torsional buckling. The test results reveal that the variation of shear stress with the shear strain in the knee could be approximated by a bilinear hysteretic curve with a strain hardening slope of 0.02-0.04. The out-of-plane displacements at the knee-brace joints and vertical displacements at the knee-beam joints are found to be small.
Source Title: Journal of Structural Engineering
ISSN: 07339445
Appears in Collections:Staff Publications

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