典型砖木结构农居地震弹塑性有限元分析  

Elasto-plastic Finite Element Analysis of Typical Brick-Wood Rural Buildings Under Ground Motions

作　　者：姚新强[1] 孙柏涛[2] 陈宇坤[1] 杨绪连[1] YAO Xinqiang;SUN Baitao;CHEN Yukun;YANG Xulian(Earthquake Administration of Tianjin Municipality ,Tianjin 300201 , China;Institute of Engineering Mechanics ,China Earthquake Administration ,Harbin 150080,Heilongjiang, China)

机构地区：[1]天津市地震局,天津300201 [2]中国地震局工程力学研究所,黑龙江哈尔滨150080

出　　处：《地震工程学报》2018年第1期32-40,共9页China Earthquake Engineering Journal

基　　金：天津市自然科学基金(17JCQNJC07000);中国地震局地震应急青年重点任务(CEA_EDEM-201702);中国地震局地震科技星火计划项目(XH18005)

摘　　要：针对我国农居结构中比例最高的砖木结构,选取典型结构运用ABAQUS有限元软件进行模态和地震时程弹塑性分析。给出M0.5和M5两种砌筑强度砖木结构农居的前三阶特征周期和振型,并与经验周期公式值进行对比分析,提出后者存在的问题和修改建议。选取天津波作为地震动时程输入,分别计算不同峰值加速度下两种砖木结构农居弹塑性地震反应,给出相应的拉损伤云图,并对结构的破坏特征进行分析,给出结构抗震薄弱部位。结果表明,砌筑强度是决定结构抗震能力的关键因素之一。Aiming at brick-wood rural residence that occupies the highest proportion among all ru-ral residences in China,an elasto-plastic analysis on mode and acceleration time-histories of a typ-ical structure is examined by applying ABAQUS software.The first three characteristic periods and vibration modes of two brick-wood rural buildings with masonry strengths of M0.5and M5are given,and the results are then compared and analyzed with the value calculated using an em-pirical formula,proposing the problems and suggestions on empirical formula revisions.In this study,by taking Tianjin seismic waves as the input ground motion,this study calculates the elas-to-plastic responses of two different brick wood rural buildings at different seismic peak accelera-tions and depicts the corresponding tensile damage nephograms.The damage characteristics and seismic weak part of the structure are also analyzed.The contrastive analysis on different mason-ry strengths shows that the masonry strength is a key factor affecting the seismic capability of the structure.

关 键 词：砖木结构 模态 弹塑性 拉损伤 

分 类 号：TU366.2[建筑科学—结构工程]