预测砌体墙板破坏荷载的广义应变能密度方法  

Method for predicting failure load of masonry wall panel based on generalized strain energy density

作　　者：黄艳霞[1] 张瑀[1] 刘传卿 周广春[1] 

机构地区：[1]哈尔滨工业大学土木工程学院结构工程灾变与控制教育部重点实验室,哈尔滨150090 [2]山东省建筑科学研究院,济南250031

出　　处：《哈尔滨工业大学学报》2014年第2期6-10,共5页Journal of Harbin Institute of Technology

基　　金：国家科技支撑项目(2013BAJ12B03)

摘　　要：为了揭示新板与基础板破坏荷载之间的关系,从面外均布荷载作用下砌体墙板的有限元模型中提取各单元的应变能密度,给出墙板的广义应变能密度概念.通过分析新板与基础板的广义应变能密度分布模式,提出了基于广义应变能密度预测砌体墙板破坏荷载的方法.算例分析表明,本文发展的方法与有限元的分析方法相比,虽然预测精度接近,但该方法具有建模过程简单、不受材料性质参数影响的优点;与屈服线方法相比,预测精度有较大提高.该方法能直接应用现有的试验数据或记录来预测新板的破坏荷载,为砌体墙板破坏荷载的预测提供一个新途径.To predict the failure load of masonry wall panel, this paper extracts the strain energy density from the finite element analysis （FEA） of masonry wall panel under the evenly distributed unit load and develops a concept of generalized strain energy density （GSED）. Then, by analyzing the GSED modes of both base and new panels, and the relationship between the failure loads of two panels is revealed. Hence, a GSED-based method is proposed. The case studies show that the GSED-based method is much more accurate than the yield line method. Comparing with the FEA method, the GSED-based method has nearly the same accuracy but a low sensitiveness to different material properties. Besides, The GSED-based method can directly apply the experimental data to predict the failure load of new panel, which provides a new way for predicting task

关 键 词：砌体墙板 广义应变能密度 破坏荷载 屈服线方法 有限元方法 

分 类 号：TU365[建筑科学—结构工程]