T形与L形截面局部设缝短肢剪力墙抗扭性能试验研究
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摘要
针对T形与L形截面局部设缝短肢剪力墙抗扭性能进行研究。分别对墙体底部局部设缝的2个T形以及2个L形截面短肢剪力墙试件进行低周拟静力扭转反复加载试验,表明试件扭矩—扭转角滞回环包围面积较小,扭转耗能较弱,延性较小,抵抗扭转地震作用能力不大,从而提出限制地震作用的楼层层间扭转角以保障短肢剪力墙的基本抗震性能,即结构楼层层间扭转角不应超过各短肢剪力墙的层间允许扭转角,并对短肢剪力墙的层间允许扭转角给出了建议。
Torsional behaviors of T-shaped and L-shaped cross section short shear walls with local joints were studied. Torsional cyclic loading tests were conducted on two T-shaped and two L-shaped cross section short shear walls with local joints at the bottom of the walls,which indicate that the area of hysteretic loop for the torsion-torsion angle of the wall is small and therefore,torsional energy dissipation and torsional ductility are poor. Based on this,it is presented that the torsional angle between adjacent floor slabs under the earthquake actions need to be limited rationally to ensure the basic seismic behaviors of the walls. The analysis results show that the torsional angle between adjacent floor slabs should not exceed that of short shear walls in the floor. Allowable values of the torsional angle between adjacent floor slabs of short shear walls were proposed.
引文
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