摘要
预制装配式混凝土结构在我国得到了大力发展,其中剪力墙结构体系应用最为广泛,如何准确和高效地模拟装配式剪力墙构件及体系的抗震性能是设计中亟须解决的关键问题之一。为了兼顾计算精度和成本,基于分层壳单元和考虑钢筋与混凝土滑移效应的Clough本构模型,建立了现浇和装配式剪力墙抗震性能分析的有限元模型。结合已有现浇和装配式剪力墙抗震性能试验,对所建立的有限元模型进行了试验对比验证,重点分析了不同模型参数取值对不同形式的剪力墙滞回性能模拟结果的影响规律。结果表明:基于分层壳的模型可以很好地模拟以弯曲破坏为主的剪力墙抗震性能,包括捏拢效应和刚度退化等性质;对于以剪切破坏为主的剪力墙,模型也能较好反映其损伤及破坏等定性规律,但是滞回曲线的刚度退化还存在一些差异,说明现有的弹塑性损伤本构还不能很好地反映往复加载下混凝土的剪切行为。该研究可为装配式剪力墙结构体系的抗震性能分析和评估提供参考。
Precast concrete structures have been vigorously developed in China,among which the shear wall structure system is the most widely used.How to accurately and efficiently simulate the seismic performance of precast shear wall components and systems is one of the key problems to be solved urgently in the design.In order to balance the calculation cost and accuracy of the model,finite element models for seismic performance analysis of cast-in-situ and precast shear walls are built based on multi-layer shell elements and Clough constitutive model considering the slip effect of reinforcement and concrete.Combined with the existing cast-insitu and precast shear wall seismic performance tests,the finite element models are compared and verified,and the influence of different model parameters on the hysteresis performance simulation results of different forms of shear wall is emphatically analyzed.The results show that the model based on multi-layer shell elements can well simulate the seismic behavior of shear wall which is dominated by bending failure,including pinching effect and stiffness degradation.For shear walls dominated by shear failure,the model can better reflect the qualitative laws of damage and failure,but there are still some differences in the stiffness degradation of the hysteretic curve,indicating that the existing elastic-plastic damage constitutive models cannot well reflect the shear behavior of concrete under reciprocating loading.This research can provide a reference for seismic performance analysis and evaluation of prefabricated shear wall structures.
作者
张相超
吕远贵
赵国飞
余敏
王叹
ZHANG Xiangchao;Lü Yuangui;ZHAO Guofei;YU Min;WANG Tan(Green Industry Investment Co.,Ltd.,China Construction Third Bureau,Wuhan 430100,China;School of Civil Engineering,Wuhan University,Wuhan 430072,China)
出处
《武汉大学学报（工学版）》
CAS
CSCD
北大核心
2022年第1期45-53,共9页
Engineering Journal of Wuhan University
关键词
装配式剪力墙
分层壳单元
抗震性能
有限元
滞回曲线
precast shear wall
multi-layer shell elements
seismic performance
finite element
hysteretic curve
