附加阻尼的悬挂式巨型钢框架支撑体系抗震性能研究
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摘要
提出一种附加阻尼的悬挂式巨型钢框架支撑体系,并基于简化准则,将其格构式主体简化为梁、柱模型,利用SAP2000软件讨论其模型合理性,而后利用静力弹塑性分析方法将梁、柱模型简化为质点系剪切模型,通过分析证实其质点系剪切模型的有效性。在此基础上,采用3条人工地震波对设定的五种结构进行地震响应弹塑性时程分析,其结果表明:对于悬挂式结构,加强其主体结构约束后,子结构与主结构之间出现刚度差,其相对位移增大,而附加阻尼的悬挂式巨型钢框架支撑体系,在减小其主结构水平位移的同时,其粘性阻尼可有效的减小主子结构间的位移差,避免其差较大而产生的结构碰撞。该体系具有地震动输入能量小、塑性变形能小及阻尼耗能大等特点。且在罕遇地震作用下,损伤只集中于悬挂的子结构上,子结构充分发挥了保护主结构的作用,其较一般的悬挂体系具有良好的抗震性能。
A new mega-suspended braced-frame structure with dampers is presented.Based on simplified guidelines,the lattice major structure of the structure is simplified as a beam-column model,SAP2000 is used to check its rationality.Then,the beam-column model is simplified as a multi-mass-system shear model by pushover method,and the effectiveness is proved.Based on the above process,a time-history method is used to analyze the five structures under three art-earthquake waves.Results show that the stiffness gap between main structure and substructure increase the relative displacement.For a mega-suspended braced-frame with dampers,the displacement of the main structure and relative displacement between the substructure and main structure can be reduced effectively by the viscous dampers.The system has some characteristics including lower input energy,less plastic deformation and more damping dissipation.The new system avoids the damage failure concentrated on the substructure under rare earthquakes.The substructure protects the main structure.Compared with other general suspension structures,it is a better aseismic structure.
A new mega-suspended braced-frame structure with dampers is presented.Based on simplified guidelines,the lattice major structure of the structure is simplified as a beam-column model,SAP2000 is used to check its rationality.Then,the beam-column model is simplified as a multi-mass-system shear model by pushover method,and the effectiveness is proved.Based on the above process,a time-history method is used to analyze the five structures under three art-earthquake waves.Results show that the stiffness gap between main structure and substructure increase the relative displacement.For a mega-suspended braced-frame with dampers,the displacement of the main structure and relative displacement between the substructure and main structure can be reduced effectively by the viscous dampers.The system has some characteristics including lower input energy,less plastic deformation and more damping dissipation.The new system avoids the damage failure concentrated on the substructure under rare earthquakes.The substructure protects the main structure.Compared with other general suspension structures,it is a better aseismic structure.
引文
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[2]周坚,伍孝波.高层建筑悬挂结构体系振动控制[J].北京建筑工程学院学报,2003,19(3):29―34.Zhou Jian,Wu Xiaobo.Vibration Control on suspensionstructure of high-rise building[J].Journal of BeijingInstitute of Civil Engineering and Architecture,2003,19(3):29―34.(in Chinese)
[3]周坚,伍孝波,刘娜.高层建筑悬挂结构体系动力分析[J].北京建筑工程学院学报,2003,19(4):2―8.Zhou Jian,Wu Xiaobo,Liu Na.Dynamic analysis insuspension structure systems of high-rise buildings[J].Journal of Beijing Institute of Civil Engineering andArchitecture,2003,19(4):2―8.(in Chinese)
[4]郭莹,裴煜,李正良.高层建筑悬挂结构体系的地震反应分析[J].重庆建筑大学学报,2003,25(5):42―46.Guo Ying,Pei Yu,Li Zhengliang.Seismic responseanalysis of high-rise building with suspended structuresystem[J].Journal of Chongqing Jianzhu University,2003,25(5):42―46.(in Chinese)
[5]王春林,吕志涛,吴京.半柔性悬挂减振结构体系地震反应分析[J].建筑结构学报,2008,29(6):107―122.Wang Chunlin,Lv Zhitao,Wu Jing.Seismic response ofsemi-flexible suspension vibration-absorption structures[J].Journal of Building Structures,2008,29(6):107―122.(in Chinese)
[6]涂永明,张继文,吕志涛,陈杰,钱洋.悬挂建筑减振体系次结构的抗侧性能[J].东南大学学报(自然科学版),2008,38(6):1099―1104.Tu Yongming,Zhang Jiwen,Lv Zhitao,Chen Jie,QianYang.Lateral performance of substructure of suspendedvibration absorption system[J].Journal of SoutheastUniversity(Natural Science Edition),2008,38(6):1099―1104.(in Chinese)
[7]王学庆,刘海卿,欧进萍.悬挂结构体系地震响应特性及其突变性分析[J].地震工程与工程振动,2009,29(3):121―125.Wang Xueqing,Liu Haiqing,Ou Jinping.Analysis ofseismic response and catastrophic behavior of suspendedstructure systems[J].Earthquake Engineering andEngineering Vibration,2009,29(3):121―125.(inChinese)
[8]阮含婷.附加阻尼的悬挂式巨型钢框架支撑体系性能研究[D].镇江:江苏科技大学,2008.Ruan Hanting.A study of property of mega-suspendedbraced frame with damper[D].Zhengjiang:JiangsuUniversity of Science and Technology,2008.(inChinese)
[9]Bai Jiulin,Ou Jinping.Seismic failure modeimprovement of RC frame structure based on multiplelateral load patterns of pushover analyses[J].ScienceChina Technological Sciences,2011,54(11):2825―2833.
[10]裴星洙,王维,王星星.基于能量原理的隔震结构地震响应预测法研究[J].工程力学,2011,28(7):65―72.Pei Xingzhu,Wang Wei,Wang Xingxing.Earthquakeresponse prediction of isolated structures based onenergy principle[J].Engineering Mechanics,2011,28(7):62―75.(in Chinese)
[11]秋山宏.エネルギ-の钓合に基づく建筑物の耐震设计[M].日本:技报堂出版,1999:1.Akiyama H.Earthquake-resistant design method forbuildings based on energy balance[M].Japan:JibaotangPress,1999:1.(in Japanese)
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