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碉房抗震性能数值仿真分析

DOI: 10.13197/j.eeev.2014.01.242.yanghq.033, PP. 242-248

Keywords: 碉房,弹塑性变形,开裂过程,有限元,抗震性能

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Abstract:

为了解藏羌族民居――碉房的抗震性能,提出适用于碉房砌筑形式的有限元随机分布离散型模型。采用数值仿真与实验对比分析的方法,选用合理的材料本构关系;将该模型应用于木堆寨194号杨宅,采用模态分析法给出结构动力特性,选用水平地震激励下时程分析法,模拟该结构线性与非线性地震反应,裂缝出现、贯通过程,以考察其抗震性能。结果表明结构的竖向刚度对位移角及层间剪力的影响较大,随输入地震峰值加速度的增加,裂缝主要出现在横纵墙交界处、横墙间距较大处、门窗洞口较多的墙体,当地震峰值加速度为0.4g时部分墙体由于裂缝过大将会出现剥落。

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