罕遇地震下大跨张弦屋盖的隔震分析
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摘要
结合克拉玛依市科技博物馆大跨度张弦屋盖,运用非线性基本理论对空间张弦结构采用隔震措施后的三维地震反应进行了研究。地面地震输入经竖向钢筋混凝土构件传导后具有放大效应,隔震支座对水平地震作用有较大改善。罕遇地震下的竖向振动对空间张弦结构有较大影响,拉索、框架单元及楼板壳单元的应力较之重力荷载状态均有较大提高。非线性时程分析表明,单元应力仍在弹性范围内,空间张弦结构采用隔震措施后在罕遇地震下是安全可靠的。
Combined with the project of Science and Technology Museum in Kelamayi,Three dimensional seismic responses of an isolated spatial beam string structure are studied by applying the non-linear finite element theory.The filtering effect of the main structure,which amplifies the ground input,is investigated.The results indicate that the vertical rare earthquake has great influence on the isolated spatial beam string structure,and stresses of cables,frames and slab shells under vertical rare earthquake are all much greater than that under gravity load.Results of non-linear time history analysis show that the structure keeps safe under rare earthquake.
Combined with the project of Science and Technology Museum in Kelamayi,Three dimensional seismic responses of an isolated spatial beam string structure are studied by applying the non-linear finite element theory.The filtering effect of the main structure,which amplifies the ground input,is investigated.The results indicate that the vertical rare earthquake has great influence on the isolated spatial beam string structure,and stresses of cables,frames and slab shells under vertical rare earthquake are all much greater than that under gravity load.Results of non-linear time history analysis show that the structure keeps safe under rare earthquake.
引文
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[7]祁皑,许航莉,等.高位层间隔震结构地震反应参数影响研究[J].工程抗震与加固改造,2010,32(2):51～56Qi Kai,Xu Hang-li,et al.Research on Theory of High Position Story-isolation Structure[J].Earthquake Resistant Engineering and Retrofitting,2010,32(2):51～56(in Chinese)
[8]GB50011-2010,建筑抗震设计规范[S]GB50011-2010,Code for Seismic Design of Buildings[S](in Chinese)
[2]徐庆阳,李爱群,张志强,等.某大跨网架结构屋盖隔震整体分析[J].工程抗震与加固改造,2007,29(6):20～24Xu Qing-yang,Li Ai-qun,Zhang Zhi-qiang,et al.Roof-isolation Integral Analysis of One Long-span Space Truss Structure[J].Earthquake Resistant Engineeringand Retrofitting,2007,29(6):20～24(in Chinese)
[3]赵楠,马凯,李婷,等.大底盘多塔高层隔震结构的地震响应[J].土木工程学报,2010,43(s1):254～258Zhao Nan,Ma Kai,Li Ting,et al.Seismic Response of Multi-tower Isolated Structure with an Enlarged Base[J].China Civil Engineering Journal,2010,(43):130～133(in Chinese)
[4]赵楠.克拉玛依科博馆倾斜结构抗震设计[J].地震工程与工程振动,2011,31(4):111～113Zhao Nan.Seismic Design of Transfinite Science Museum in Kelamayi[J].Journal of Earthquake Engineering and Engineering Vibration,2011,31(4):111～113(in Chinese)
[5]赵楠,马凯,李婷,等.防连续倒塌设计在张弦结构中的应用[J].钢结构,2011,26(5):38～44Zhao Nan,Ma Kai,Li Ting,et al,Application of Prevention of Progressive Collapse in Beam String Structure[J].Journal of Steel Construction,2011,26(5):38～44(in Chinese)
[6]杜永峰,李春锋.连廊位置对高层连体结构地震响应的影响[J].工程抗震与加固改造,2008,30(3):60～63Du Yong-feng,Li Chun-feng.Influence of the Connection Position on Seismic Response of the Connected[J].Earthquake Resistant Engineering and Retrofitting,2008,30(3):60～63(in Chinese)
[7]祁皑,许航莉,等.高位层间隔震结构地震反应参数影响研究[J].工程抗震与加固改造,2010,32(2):51～56Qi Kai,Xu Hang-li,et al.Research on Theory of High Position Story-isolation Structure[J].Earthquake Resistant Engineering and Retrofitting,2010,32(2):51～56(in Chinese)
[8]GB50011-2010,建筑抗震设计规范[S]GB50011-2010,Code for Seismic Design of Buildings[S](in Chinese)
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