附加阻尼的悬挂式巨型框架复合支撑体系地震响应分析
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摘要
将悬挂式巨型框架结构简化为质点系模型后,利用SAP2000软件静力弹塑性分析模块计算各层主、子结构的抗侧刚度,并讨论其简化质点系模型的合理性。在此基础上,提出一种附加阻尼的悬挂式巨型框架复合支撑体系,选取三条地震波,利用自编程序进行地震响应弹塑性时程分析。计算结果表明:随着抗侧刚度的增加,体系由阻尼消耗的地震能量增加,而变形耗能减少。附加阻尼的预应力复合支撑体系,在减小体系各层水平位移的同时,有效地减小主、子结构间的相对位移,能够避免主、子结构的碰撞,对主结构起到保护作用。
A kind of mega-suspended frame systems installed with composite supports and dampers was put forward.The stem department of the system was simplified to a mass points system model.The lateral stiffness of each layer was deduced by use of elastic-plastic static method through SAP2000 software and the rationality of the simplification was discussed with the help of SAP2000 software and a self-designed procedure.On this basis,the elastic-plastic seismic response was analysed under three types of seismic waves excitation utilysing the self-compiled program respectively.The results show that along with the increase of lateral stiffness of the system,the deformation energy consumption of the system reduces and the seismic energy consumption by the dampers increases.For the mega-suspended braced and prestressed frame attached with dampers,the main structure's horizontal displacement and the relative displacement between main and substructure can be reduced effectively by viscous dampers which can also avoid collisions and protect main structure.
A kind of mega-suspended frame systems installed with composite supports and dampers was put forward.The stem department of the system was simplified to a mass points system model.The lateral stiffness of each layer was deduced by use of elastic-plastic static method through SAP2000 software and the rationality of the simplification was discussed with the help of SAP2000 software and a self-designed procedure.On this basis,the elastic-plastic seismic response was analysed under three types of seismic waves excitation utilysing the self-compiled program respectively.The results show that along with the increase of lateral stiffness of the system,the deformation energy consumption of the system reduces and the seismic energy consumption by the dampers increases.For the mega-suspended braced and prestressed frame attached with dampers,the main structure's horizontal displacement and the relative displacement between main and substructure can be reduced effectively by viscous dampers which can also avoid collisions and protect main structure.
引文
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[10]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):107-112.
[11]涂永明,张继文,吕志涛,等.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.
[2]张耀华,梁启智,付赣清.巨型框架悬挂体系抗震原理及初步设计方法[J].工程力学,2000,17(2):10-17.
[3]郭莹,裴煜,李正良.高层建筑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.
[4]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.
[5]马宏.巨型桁架悬挂钢结构体系抗震性能研究[D].南京工业大学,2003,5.
[6]刘克玲,罗兆辉.悬挂质量结构的减震性能分析[J].天津城市建设学院学报,2001,7(3):154-158.
[7]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.
[8]江燕瑜,张耀华.巨型框架悬挂体系阻尼控制设计方法[J].工程力学,2001,增刊,98-102.
[9]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.
[10]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):107-112.
[11]涂永明,张继文,吕志涛,等.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.
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