场地特征对不同高度建筑结构地震反应的影响  

Influence of Site Characterization on Structural Responses of Multistory Buildings

作　　者：朱川海 董佩伟[2] 赵昕[3] 

机构地区：[1]绿地控股集团有限公司,上海200092 [2]同济大学建筑工程系,上海200092 [3]同济大学建筑设计研究(集团)有限公司,上海200092

出　　处：《结构工程师》2013年第4期105-111,共7页Structural Engineers

摘　　要：多层及高层建筑结构的地震响应通常通过反应谱分析得到。我国抗震规范中给出的设计反应谱及设计地震分组和场地类别的规定使结构地震响应分析简单易行且具有很好可靠性。采用三个分别为2层、5层和17层的住宅结构模型,分析其在不同的设计地震分组和场地类别下结构地震响应的差异,得到多层及高层建筑结构地震响应对场地特征的敏感性。结果表明,低层建筑结构的地震响应对场地特征敏感性较低;高层建筑结构的地震响应对场地特征有较大敏感性,且对场地类别的敏感程度比对设计地震分组的敏感程度高。Structural responses of multistory buildings under minor earthquakes are usually obtained from re- sponse spectrum analysis. The Chinese code for seismic design offers seismic response spectra which consider- ing design characteristic-periods and soil conditions. This makes structural response analysis under minor earthquakes easy and reliable. Three cases study of a 2-stoty,a 5-story and a 17-story building models were used to assess the earthquake response sensitivity to the site condition for multistory building structures. Response spectrum analyses with different design characteristic-periods and soil conditions were performed on the three building models. The results demonstrate that the response of low-rlse buildings is not sensitive to the site condition, while the structural response of high-rise buildings is. It was also found that structural respon- ses of high-rise buildings is more sensitive to the soil condition than to the design characteristic-period.

关 键 词：多层及高层建筑结构 反应谱 设计地震分组 场地类别 

分 类 号：TU973.31[建筑科学—结构工程]