钢筋混凝土剪力墙考虑动力效应的恢复力模型

发布时间：2018-08-01 17:39

【摘要】：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。
[Abstract]:In view of the lack of calculation model for considering dynamic effect of shear wall at present, according to the results of pseudostatic and fast dynamic loading tests of 9 shear wall specimens, a shear wall restoring force model considering dynamic effect is proposed, and the corresponding MATLAB program is written. It is used to simulate the pseudostatic and fast loading test results of the above 9 specimens and 6 other specimens. The calculated results show that the dynamic behavior of shear walls under rapid loading can be more accurately described by the restoring force model considering dynamic effects within the range of seismic strain rate. On this basis, the seismic time-history response of a single-span six-story reinforced concrete shear wall structure considering strain rate effect and not considering strain rate effect is analyzed by using the proposed restoring force model. The results show that when the strain rate effect is taken into account, the ductility of the structure decreases slightly under earthquake, which may lead to brittleness failure in advance. Therefore, the influence of strain rate effect should be taken into account in the elastoplastic seismic response analysis of structures.
【作者单位】：大连理工大学建设工程学部;
【基金】：国家自然科学基金重大研究计划集成项目(91315301) 重大国际合作项目(51261120375)
【分类号】：TU375;TU311.3

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