基于扩展有限元法的RC剪力墙抗震性能模拟  

Simulation of Seismic Behavior for RC Shear Wall Based on Extended Finite Element Method

作　　者：瓮文芳 余江滔[1] 陆洲导[1] 张远淼[1] 

机构地区：[1]同济大学结构工程与防灾研究所,上海200092

出　　处：《结构工程师》2014年第6期109-116,共8页Structural Engineers

基　　金：国家自然科学基金(51008235)

摘　　要：采用基于ABAQUS的扩展有限元方法对RC剪力墙的拟静力试验进行模拟,将模拟所得的开裂破坏过程、滞回曲线、滞回环和骨架曲线与试验结果进行对比,并分析开裂混凝土单元的力学反应,结果表明模拟所得的构件开裂过程和破坏形式,以及试件承载能力、刚度退化、位移延性等性能与试验结果吻合较好,证明了模拟方法的可行性。借助这种方法,进一步探究了轴压比和剪跨比等影响因素对剪力墙抗震性能的影响,结果表明:随轴压比增大,剪力墙承载力增大,极限位移减小;剪跨比减小时,剪力墙承载力有所增加,而极限位移减小。以上模拟结果均与试验结论一致。This article simulated a RC shear wall under pseudo-static test by ABAQUS model based on ex-tended finite element method.The process of crack and failure,hysteretic curves,skeleton curves and hyster-etic loops of the simulation were compared with those of the test.At the same time,mechanical response of crack elements was discussed.Results show that the model could simulate not only the crack period and failure but also seismic behavior such as stiffness degradation,bearing capacity and displacement ductility,which proves feasibility of the model method.Based on this method,further investigation was made to find out how axial compression ratio and shear span ratio affect work behavior of shear walls.Results show that bearing ca-pacity of shear wall increase and the ultimate displacement decline as the axial compression ratio increase or the shear span ratio decrease,which are consistent with experimental results.

关 键 词：扩展有限元法 RC 剪力墙 滞回曲线 骨架曲线 抗震性能 

分 类 号：TU375[建筑科学—结构工程] TU352.11