T形短肢剪力墙的延性分析

Theoretical research on ductility of T-shaped short-leg shear wall

基于有限元原理分析了混凝土强度等级、轴压比、翼缘宽度和墙肢截面配筋率对T形短肢剪力墙构件延性性能的影响。结果表明:翼缘可以大大改善T形短肢剪力墙的延性性能,增加短肢剪力墙在地震作用下的耗能能力,在设计和墙体的侧移计算中应考虑翼缘的参与作用,翼缘的宽度可取大于8倍翼缘的厚度;随着轴压比的增加,结构的延性性能降低;在混凝土强度等级为C30～C40和配筋率为0.012～0.016时,结构的位移延性相对较好。故在工程设计中,应合理选择这些参数,使短肢剪力墙具有良好的延性,增强结构的抗震能力。

Influence of strength of concrete, axial compression ratio, width of flange and reinforcement ratio of shear wall on the ductility properties of T-shaped short-leg shear wall was analyzed based on finite element principle. The results show that flange can greatly improve ductility of T-shaped short-leg shear wall and increase the energy dissipation capacity of T-shaped short-leg shear wall under earthquake. In the design and lateral displacement calculation of the wall,the participation and effects of flange should be considered. The flange width earl be 8 times of flange thickness. With the axial compression ratio increases, ductility performance of the structure decreases. When the strength of concrete grade is C30 ~ C40 and reinforcement rate 0. 012 ~ 0. 016, the displacement ductility of structure is relatively better. Therefore,these parameters should be reasonably chosen in engineering design so as to enhance ductility and seismic performance of short-oier shear wall.