周绪红1,2,姚欣梅1,管宇1,石宇2.结构参数对低层轻钢房屋抗震性能影响分析[J].湖南大学学报:自然科学版,2020,(1):1~9
结构参数对低层轻钢房屋抗震性能影响分析
Influence Analysis of Different Structural Parameters on Seismic Performance of Low-rise Lightweight Steel Buildings
  
DOI:
中文关键词:  低层轻钢结构  振动台试验  动力特性  抗震性能  有限元分析
英文关键词:low-rise lightweight steel building  shaking table tests  dynamic characteristics  seismic behavior  finite element analysis
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作者单位
周绪红1,2,姚欣梅1,管宇1,石宇2 (1. 长安大学 建筑工程学院陕西 西安 710061 2. 山地城镇建设与新技术教育部重点实验室(重庆大学)重庆 400045) 
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中文摘要:
      为研究不同结构参数对低层轻钢房屋抗震性能的影响,以已有试验结果为基础,采用ABAQUS软件建立轻钢房屋的有限元模型,计算得到的房屋自振频率、加速度反应及位移反应等均与试验结果吻合较好,验证了有限元模型的正确性. 在此基础上,对验证后的房屋模型在9度多遇及9度罕遇地震作用下进行了变参数分析. 研究结果表明:采用增加覆面板数量、增设柱间斜撑的墙体构造形式可提高房屋的自振频率、加速度及位移响应;但改变覆面板材料对整体结构的动力特性及地震响应影响较小;墙体开洞率对房屋在地震作用下的结构响应影响明显,因此墙体开洞率不应大于29.09%;轻钢房屋长宽比减小,平面布置更规则,结构自振频率增大,加速度及位移响应降低.
英文摘要:
      In order to investigate the influence of different structural parameters on the seismic performance of low-rise lightweight steel buildings,the finite element model of lightweight steel building was established by ABAQUS based on the experimental results. It shows that the finite element analysis results,in terms of fundamental frequency,acceleration and displacement responses,agree well with the experimental results. Furthermore,a parametric study based on the verified model under 9-degree frequent occurring and maximum considered earthquakes was carried out. The results show that the increase of the sheathing number and adding diagonal bracing can improve the fundamental frequency,acceleration and displacement responses of buildings,but the change of the sheathing material has little effect on it; the wall opening ratio has obvious effect on the structural response of the building under earthquake. Thus,the wall opening ratio should not be greater than 29.09%; decreasing the aspect ratio and choosing regular plan layout of lightweight steel buildings result in the increase of the natural frequency and decrease of the acceleration response and displacement response.
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