短肢剪力墙应变演化及破坏模式分析

Strain evolution and failure mode analysis of short pier shear wall

由于应力重分布,钢筋混凝土结构在地震作用下的应力分布变化多端、复杂,其变化过程可从应变分布演化过程来反映。通过追踪6个T形截面短肢剪力墙的应变演化过程,还原了试件在低周反复荷载作用下的应力变化全过程。在上述基础上,对试件的破坏模式做出了准确的分析,进而准确地找出了试件的薄弱部位、提出了一些加固意见,并探讨了平截面假定的适用性。

A Stress distribution is complex and changeable drastically in RC structure under earthquake effect because of stress redistribution, the changing process can be reflected through strain evolution. Stress changing process re appeared by tracing strain evolution of six Tshaped short pier shear wall specimens under low cyclic loading. Based on the above research, failure mode of specimens was accurately analyzed to find the weakest parts of the speci mens. Some suggestions were proposed for strengthening the weakest parts, the applicability of planesection as sumption was investigated too.