双连梁短肢剪力墙结构的随机损伤演化分析  

Stochastic Simulation of Damage Evolution Process in a RC Shear Wall with Twin Coupling Beams

作　　者：曹杨[1] 李杰[1] 

机构地区：[1]同济大学建筑工程系

出　　处：《力学季刊》2008年第1期102-112,共11页Chinese Quarterly of Mechanics

基　　金：国家“十五”攻关项目(2002BA806B-4);国家创新研究群体资助项目(50321803)

摘　　要：基本于概率密度演化方法和混凝土弹塑性损伤本构模型,本文针对一类新型双连梁短肢剪力墙开展了随机损失演化模拟研究。基于广义概率密度方程分别研究了结构荷载与受拉、受剪损伤随机过程,分析了三者在结构受力全过程中均值、方差以及变异系数的变化特征;通过不同随机参数组合计算结果与结构均值反应的对比,发现宏观结构荷载-位移曲线和细观受拉、受剪损伤随位移变化过程之间存在很大差异;通过分析研究典型位移水平下结构荷载与受拉、受剪损伤的概率密度曲线以及其极限状态下各自所对应的等概率线分布,不仅阐释了随机损伤演化的多样性与复杂性,而且为从本质上认识非线性问题提供了可能途径。Based on the probability density evolution method and the elastoplastic damage constitutive model for concrete, this study has attempted to carry out a stochastic simulation of the damage evolution processes in a new short-pier shear wall specimen with twin coupling beams. In virtue of the generalized probability density evolution equation, a series of lateral load, tensile damage and shear damage stochastic processes have been constructed to summarized the characteristics of their means, standard deviations as well as coefficients of variation respectively; By means of comparing the results from different combinations of random parameters with the mean response, considerable differences have been disclosed between the lateral load-displacement curves and the tensile damage and shear damage evolution processes; In light of the probability density functions of lateral load, tensile damage and shear damage curves together with the contours of equal probability at the ultimate state, this study has not only explained the diversity and complexity of the damage evolution processes, but also supplied a possible approach to understand the essence of nonlinear problems.

关 键 词：概率密度演化方法 混凝土弹塑性损伤本构模型 双连梁短肢剪力墙 损伤演化过程 

分 类 号：TU311.1[建筑科学—结构工程]