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机构地区:[1]华东交通大学土木建筑学院,江西南昌330013 [2]广西工学院土木建筑工程系,广西柳州545006
出 处:《广西工学院学报》2011年第3期35-40,共6页Journal of Guangxi University of Technology
基 金:国家自然科学基金项目(50868006)资助
摘 要:拱式转换层是一种新型转换层结构形式,通过研究罕遇地震作用下带拱式转换层高层结构的弹塑性抗震性能,并利用弹塑性动力时程分析法对结构进行罕遇地震反应进行研究,结果表明:7度抗震设防时该结构采用下列加强原则是比较合理的,即转换层底部柱承载力增大系数分别为1.3(Ⅰ类场地)、1.9(Ⅱ类场地)、2.2(Ⅲ类和Ⅳ类场地);转换层相邻上部柱承载力增大系数为1.25;转换层下弦杆跨中抗弯承载能力增大系数为3.5.分析还表明,该结构不宜建在Ⅳ类场地.Arch transfer floor is a new type of transfer floor structure. The research work in this paper is the elasto- plastic analysis of tall building with arch transfer story under the action of severe earthquake, so elasto-plastic dy- namic time history analysis is adopted to research the sesmic response of the structure under the action of severe earthquake.The results shows that the following strengthen principle of the structure of is reasonable under the ac- tion of the seismic precautionary intensity 7, that is the coefficient of enhancement of bearing capacity of the bottom columns is 1.3(site of category Ⅰ ), 1.9(site of category Ⅱ ) and 2.2(site of category Ⅲandiv), that of columns in the adjacent story above the transfer story is 1.25, and that of the lower chord is 3.5.Besides, it may be indicated that this structure may not be built in the site of category Ⅳ.
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