短肢剪力墙的弹塑性性能拟试验研究

Study on Elastoplastic Performances in Simulation Test of Short-pier Shear Wall

基于一试验模型,采用等代框架的有限元方法,应用带刚域的弹塑性杆单元来模拟短肢剪力墙的连梁进行模拟试验研究,对比分析计算结果与试验结果。对轴压比、墙肢高厚比、连梁跨高比等参数不同的短肢剪力墙进行了弹塑性分析,研究了这些参数对短肢剪力墙弹塑性性能的影响。结果表明,在墙肢截面和配筋率一定时,随着轴压比的增加,短肢剪力墙的承载能力提高,位移增大;而在墙肢高度不变时,随着墙肢高厚比的增加,短肢墙的承载力降低,位移结果离散;在连梁跨度不变情况下,随着跨度增加,短肢剪力墙承载力降低,延性增大。因此在设计中,通过合理选择这些参数,可以使短肢剪力墙具有较高的承载力和良好的延性。

Based on an equipment model, taking the method of equivalent frame finite element, the coupling beams of short shear walls are simulated by using frame elements with stiffness areas, and the results are compared. The elastoplastic analyses of short pier shear walls with different pier strength coefficients, ratio of axial compressive force to axial compressive ultimate capacity of section, ratio of height to section thickness of the wall-column and ratio of span to height of the coupling beams are implemented. The results indicate that with the increase of the first coefficient the load capability and displacement of short pier wall increase; with the increase of the second one the load capability decreses and the displacement isn ＇ t convergent ; with the increase of the third coefficients the load capability decreses and the ductility increases. Therefore, by reasonably choosing these parameters in design, the wail can be made with better performances in load capacity and ductility.