T形短肢剪力墙弹塑性模型及地震反应分析
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摘要
根据短肢剪力墙结构的受力和变形特点,对多竖直杆模型进行了改进,建立了截面位移模型,摒弃了杆模型平截面假定的限制,有效地考虑了剪滞效应和翼缘的影响。利用变分原理导出了T形短肢剪力墙的空间单元刚度矩阵,研制了弹塑性时程分析程序,并输入三种不同的地震动进行了算例分析,计算结果表明,短肢剪力墙结构抗震性能较好,适合于在地震区推广使用。
According to mechanical properties and deformation feature of short-leg shear wall, multi-component model is improved by introducing the cross section displacement function which considers the effect of shear-lag and flange plate, and thus it is free of the restriction of plane cross section assumption. Space stiffness matrix is derived by variational principle and program of elastoplastic time-histroy analysis is developed. Finally, an example is calculated by inputting three kinds of earthquake waves. The results show that short-leg shear wall is possessed of relatively good earthquake resistance performance. So it is worthy of using in earthquake zones.
引文
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