暗支撑高度变化时十字型短肢剪力墙非线性分析

Nonlinear analysis on cross-section short-pier RC shear wall with the height of concealed bracings changes

利用ANSYS对8个带暗支撑的十字型钢筋混凝土短肢剪力墙进行单调荷载作用下的非线性有限元分析,比较了在暗支撑布置高度变化时,剪力墙的承载能力、刚度和变形能力变化情况,分析了带暗支撑的十字形短肢剪力墙的暗支撑位置对构件的极限荷载和破坏形态的影响,揭示该型短肢剪力墙结构的真实力学行为,得出暗支撑在十字形短肢剪力墙的上下两端附近时对抗震最为有利的结论。为实际工程的截面设计提供依据。

Eight cross-section reinforced-concrete short-pier shear wall with concealed bracings specimens under monotonic load were analyzed by the nonlinear finite element analysis with the software ANSYS, which compared the effect of the variation of the height of the concealed bracings on load capacity, stiffness and deformation capacity of the shear wall, and analyzed the influence of the concealed bracings＇ position on ultimate load and failure patterns of cross-section short-pier RC shear wall. And the real mechanical behavior of cross-section short-limb shear wall was revealed. The analysis results show that it is more beneficial to the seismic performance of cross-section short-pier RC shear wall when the position of concealed bracings is near both ends of the structure. Then a meaningful basis for practical engineering design of the section is provided.