钢筋混凝土剪力墙扭转行为的试验研究  

Behavior of Reinforced Concrete Walls under Pure Torsion

作　　者：彭晓宁[1] 黄玉龙[1] 吴波[2] 

机构地区：[1]香港理工大学 [2]华南理工大学,广州510641

出　　处：《华南地震》2008年第2期125-134,共10页South China Journal of Seismology

摘　　要：通过对4个1/2缩尺的钢筋混凝土剪力墙的静力加载试验,探讨了不同截面尺寸及配筋率对剪力墙抗扭强度、扭转变形、破坏形态及裂缝发展的影响。试验揭示了三种扭转破坏形态:少筋破坏、部分超筋破坏及超筋破坏。通过理论值与实验值的比较发现,斜弯理论(经PCA①试验修正)能够很好的预测墙的开裂扭矩及开裂扭转角。另外,通过对试验所得的全变形曲线与软化桁架模型(Softened Truss Model)的预测变形曲线进行比较,发现基于梁单元扭转机理的软化桁架模型可以较合理地预测墙的最大扭转值及对应的扭转角,但不能较好地模拟实验曲线中的下降段。This paper reports an experimental study of the torsional behavior of four reinforced concrete wall specimens. The test results reveal that the major crack angle on the longer face of the wall depends on the ratio of the longitudinal rebar content to the transverse rebar content of the wall, whereas such dependence is not quite obvious for the major crack angle on the shorter face. The cracking torques predicted by the skew-bending theory （modified by PCA tests） show a good agreement with the test results. Comparing with the experimental data, the maximum torque and the associated twist angle calculated from the softened truss model （STM） are under-estimated, and those from the non-softened truss model （NON-STM） are over-estimated. Both truss models can not simulate the post-peak descending torque-twist curves of the wall specimens.

关 键 词：剪力墙的扭转 扭转试验 最大扭矩 扭转角 软化桁架模型 扭矩-转角曲线 

分 类 号：TN914[电子电信—通信与信息系统]