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针对目前缺乏剪力墙考虑动力效应的计算模型,根据已有9片剪力墙试件拟静力和快速动力加载试验结果,提出了考虑动力效应的剪力墙恢复力模型,并编写了相应的MATLAB程序,用于对上述9个试件以及另外6个试件的拟静力和快速加载的试验结果进行模拟。计算结果显示,在地震应变率影响范围内,考虑动力效应的恢复力模型能够更为准确地描述剪力墙在快速加载下的动态性能。在此基础上,运用所提出的恢复力模型,对比分析了一单跨6层钢筋混凝土剪力墙结构在考虑应变率效应与不考虑应变率效应两种情况下的地震时程反应。结果表明,考虑应变率效应时,结构在地震作用下延性稍有降低,可能提前发生脆性破坏。因此,在进行结构弹塑性地震反应分析时应适当考虑应变率效应的影响。
In view of the current lack of calculation model of shear wall considering dynamic effects, according to the existing 9 shear wall specimens quasi-static and rapid dynamic loading test results, put forward to consider the dynamic effect of shear wall resilience model, and prepared the corresponding MATLAB program to simulate the quasi-static and rapid loading test results of the above 9 specimens and 6 specimens. The calculation results show that in the range of seismic strain rate, the restoring force model considering dynamic effect can describe the dynamic performance of shear wall under rapid loading more accurately. Based on this, by using the proposed restoration model, the seismic time history responses of a single span six-story reinforced concrete shear wall structure under both the strain rate effect and the strain rate effect are compared and analyzed. The results show that considering the effect of strain rate, the ductility of the structure decreases slightly under the action of earthquake and brittle failure may occur ahead of time. Therefore, the effect of strain rate should be properly considered in the structural elastoplastic seismic response analysis.