模块化钢框架摩擦摆隔震结构抗震性能研究
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摘要
将摩擦摆隔震体系应用在模块化钢框架结构中,研究摩擦摆支座对模块化结构整体性能的影响规律。基于ETABS有限元软件,考虑模块化节点刚域对结构刚度的影响,采用摩擦摆隔震体系对某模块化建筑示范综合办公楼进行基础隔震设计与研究,并进行了多遇地震作用下的弹性时程分析、设防烈度和罕遇地震作用下的弹塑性时程分析。分析结果表明,节点刚域对抗震结构地震响应的影响比对隔震结构地震响应的影响更大。FPS隔震体系在多遇地震作用下隔震效果不明显,在设防烈度及罕遇地震作用下能起到良好的隔震作用。罕遇地震作用下,隔震结构中仅发现少量梁铰,无柱铰出现,上部结构结构基本处于弹性,隔震效果显著。
In this paper, the friction pendulum system is applied to the modular steel frame structure, and the influence of the friction pendulum bearing on the seismic performance of the modular structure is studied. Finite element model of the isolated modular steel frame structure is established within the environment of ETABS.Considering the effect of node rigid zone on stiffness of structure, a real engineering of base-isolated modular building is designed and investigated by using friction pendulum system herein. Nonlinear analysis of non-isolated and isolated modular steel frame structure is carried out and compared under the selection of ground motion with seismic fortification intensity of 7. The analytical results show that the effect of the node rigid zoneon nonisolated structure is greater than the isolated counterpart. The isolation effect of the FPS system is not obvious under the frequent earthquakes, however, it can perform well under the moderate and rare earthquakes.Few beam hinges appear and the isolated structure remain elastic under rare earthquakes. The safety and performance of the modular structure have been improved significantly by using friction pendulum bearings.
In this paper, the friction pendulum system is applied to the modular steel frame structure, and the influence of the friction pendulum bearing on the seismic performance of the modular structure is studied. Finite element model of the isolated modular steel frame structure is established within the environment of ETABS.Considering the effect of node rigid zone on stiffness of structure, a real engineering of base-isolated modular building is designed and investigated by using friction pendulum system herein. Nonlinear analysis of non-isolated and isolated modular steel frame structure is carried out and compared under the selection of ground motion with seismic fortification intensity of 7. The analytical results show that the effect of the node rigid zoneon nonisolated structure is greater than the isolated counterpart. The isolation effect of the FPS system is not obvious under the frequent earthquakes, however, it can perform well under the moderate and rare earthquakes.Few beam hinges appear and the isolated structure remain elastic under rare earthquakes. The safety and performance of the modular structure have been improved significantly by using friction pendulum bearings.
引文
[1]陈志华,秦颖,王小盾,等.模块化建筑隔震体系:CN102912878A[P].2013-02-06.
[2]张文芳,赵跟收,贾保林,等.盒式房屋层间摩擦隔震体系地震反应的时程分析[J].山西建筑,2002(04):1-3.
[3]Zayas V A,Low S,Bozzo L,et al.Feasibility and performance studies on improving the earthquake resistance of new and existing buildings using the friction pendulum system[R].Technical Report UBC/EERC-89/09,Berkeley:California University,1989.
[4]周星德,林小国.非线性基础隔离结构振动控制研究[J].东南大学学报,2007,37(6):1 023-1 026.
[5]杨林,周锡元,苏幼坡,等.FPS摩擦摆隔震体系振动台试验研究与理论分析[J].特种结构,2005(04):43-46.
[6]陈鹏,周颖.摩擦摆支座隔震结构实用设计方法[J].地震工程与工程振动,2017,37(01):56-63.
[7]谭平,李洋,匡珍,等.装配式隔震结构中隔震节点抗震性能研究[J].土木工程学报,2015,48(02):10-17.
[8]赵伟.摩擦摆支座的摩擦系数对结构隔震性能影响分析[C]//中国力学学会结构工程专业委员会.第16届全国结构工程学术会议论文集(第Ⅲ册).北京:中国力学学会结构工程专业委员会,2007.
[9]中华人民共和国住房和城乡建设部.建筑抗震设计规范:GB50011-2010[S].北京:中国建筑工业出版社,2010.
[2]张文芳,赵跟收,贾保林,等.盒式房屋层间摩擦隔震体系地震反应的时程分析[J].山西建筑,2002(04):1-3.
[3]Zayas V A,Low S,Bozzo L,et al.Feasibility and performance studies on improving the earthquake resistance of new and existing buildings using the friction pendulum system[R].Technical Report UBC/EERC-89/09,Berkeley:California University,1989.
[4]周星德,林小国.非线性基础隔离结构振动控制研究[J].东南大学学报,2007,37(6):1 023-1 026.
[5]杨林,周锡元,苏幼坡,等.FPS摩擦摆隔震体系振动台试验研究与理论分析[J].特种结构,2005(04):43-46.
[6]陈鹏,周颖.摩擦摆支座隔震结构实用设计方法[J].地震工程与工程振动,2017,37(01):56-63.
[7]谭平,李洋,匡珍,等.装配式隔震结构中隔震节点抗震性能研究[J].土木工程学报,2015,48(02):10-17.
[8]赵伟.摩擦摆支座的摩擦系数对结构隔震性能影响分析[C]//中国力学学会结构工程专业委员会.第16届全国结构工程学术会议论文集(第Ⅲ册).北京:中国力学学会结构工程专业委员会,2007.
[9]中华人民共和国住房和城乡建设部.建筑抗震设计规范:GB50011-2010[S].北京:中国建筑工业出版社,2010.