Seismic Design and Response of Chevron-Shaped Buckling-Restrained Braced Frames
A seismic response analysis is carried out in order to compare the aseismic performance of three buckling-restrained braced frames (BRBFs). The effects of the two factors,including overstrength of the postyield buckling-restrained brace (BRB) and the vertical support of the brace for the braced beam,on the aseismic performance of the BRBFs with the chevron unbonded steel plate brace encased in reinforced concrete panel (so-called chevron BRB) are investigated. The analysis results indicate that,the frames in the three structures remain elastic under frequent earthquake excitation. The maximum vertical deflection of the braced beam occurs in the segments of beam between the column and braced points before the brace yielding,whereas which occurs at the braced points after the braces yielding. Under severe earthquake excitation,the beams designed by introducing support of brace whereas omitting overstrength of brace develop large plastic deformation,resulting in the slightly larger deflection of the braced beams and enlarging the gravity forces supported by the chevron BRBs,which make axial plastic deformation of the brace in compression be larger than that of the brace in tension. On the contrary,only the small plastic deformation occurs in the braced beams designed by omitting support of brace whereas introducing overstrength of brace.
Chevron-shaped buckling-restrained braced frame Unbonded steel plate brace encased in reinforced concrete panel Seismic design Seismic response analysis Hysteretic behavior
Yaochun Zhang Yukun Ding
School of Civil Engineering,Harbin Institute of Technology,Harbin,150090 China
国际会议
哈尔滨
英文
69-74
2008-10-11（万方平台首次上网日期，不代表论文的发表时间）