纤维墙元模型在剪力墙结构非线性分析中的应用  

Application of Fiber Wall Element Model in Nonlinear Analysis of Shear Wall Structures

作　　者：吕西林[1] 卢文生[1] 

机构地区：[1]同济大学土木工程防灾国家重点实验室,上海200092

出　　处：《力学季刊》2005年第1期72-80,共9页Chinese Quarterly of Mechanics

基　　金：国家自然科学基金(50025821);创新研究群体基金(50321803)

摘　　要：钢筋混凝土剪力墙是目前高层与超高层建筑中最主要的抗侧力构件,本文在对已有的微观及宏观计算模型进行比较的基础上,基于纤维模型概念,建立了便于高层剪力墙结构非线性分析应用的纤维墙元模型,即由承受轴力及弯矩的纤维子单元与承受剪切变形的剪切子单元相合成的墙元计算模型;同时,对该模型中剪切子单元高度的取值进行了分析,明确了其物理含义;推导了单元的刚度矩阵,并分别建立了纤维子单元及剪切子单元的骨架曲线及滞回规则。另外,应用该计算单元模型,对一栋40 层框架剪力墙结构进行了非线性时程分析,计算结果与相应模型的振动台试验结果进行了对比,比较结果表明两者在结构动力特性,位移响应方面等均吻合较好,验证了该计算单元模型的准确性与有效性,可为推广使用提供参考。Reinforced concrete shear wall is one of the main lateral force resisting elements in high rise building. Based on the idea of fiber model, a fiber wall element model was put forward, which was composed of fiber element that represents the flexural deformation only, and shear element that represents the shearing only. In this model, the height of shearing element and stiffness matrix of the proposed element, and its skeleton and hysteretic curves were also built up. Using the fiber wall element, the dynamic responses of a 40-story shear wall structure were computed and compared to the shaking table test of the same model structure. The good agreement between them indicates that the fiber wall element model proposed here is reasonable and efficient in the nonlinear analysis of shear wall structures.

关 键 词：剪力墙结构 纤维模型 纤维墙元模型 非线性分析 

分 类 号：TU375[建筑科学—结构工程]