框架结构加层后的非线性动力分析
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摘要
钢筋混凝土框架结构采用轻钢结构加层后,结构的动力性能将发生较大变化,需要对加层后的整体结构进行分析。通过对3种结构(即无加层的原钢筋混凝土框架结构、用钢结构加层后的整体结构、钢结构加层并设置阻尼器的结构),选用地震持时为12 s,地震最大加速度为220 gal,分别进行了地震反应时程分析计算。结果表明,设置阻尼器的比未设置阻尼器的轻钢加层结构的顶层位移和加速度都在显著减小。阻尼器的设置,可增加结构的耗能能力以及减小顶部层间位移,从而达到对结构振动控制的目的。
The RC frame structure after adding storeys with the light steel structure will change greatly in the dynamic performance,it is necessary to analyze the integral structure.Here,three different integral models,such as the original RC frame structure and the structure after adding storeys with or without viscous dampers on the top of it,are compared and analyzed using the timehistory analysis method under earthquake.The results show that the dampers can significantly increase the capacity of energy consumption of the structure,and reduce the displacement between the top layers,so the vibration control of the structure can be achieved.
The RC frame structure after adding storeys with the light steel structure will change greatly in the dynamic performance,it is necessary to analyze the integral structure.Here,three different integral models,such as the original RC frame structure and the structure after adding storeys with or without viscous dampers on the top of it,are compared and analyzed using the timehistory analysis method under earthquake.The results show that the dampers can significantly increase the capacity of energy consumption of the structure,and reduce the displacement between the top layers,so the vibration control of the structure can be achieved.
引文
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[7]令贝斌刚,赵建昌,鞠学廷,等.隔震加固多层建筑结构的非线性时程分析[J].水利与建筑工程学报,2009,7(3):146-148.
[2]Soong TT,Darguush GF.Passive Energy Dissipation Systemin Struc-tural Engineering[M].State University of NewYork Buf-falo,1997.
[3]American Society of Civil Engineering.Prestandard and commentaryforthe seismic rehabilitation of buildings[S].FEMA-356,Washington DC,2000.
[4]魏文晖,瞿伟廉,陈朝晖.粘弹性阻尼器对建筑结构非线性地震反应的控制[J].地震工程与工程振动,1999,19(4):95-101.
[5]王元清,宋锋,石永久,等.钢结构跃层加层的地震反应分析[J].四川建筑科学研究,2006,32(2):100-104,117.
[6]魏文晖,瞿伟廉,杨志勇.Ved人字型支撑结构体系非线性地震反应控制分析[J].武汉工业大学学报,2000,22(3):24-27.
[7]令贝斌刚,赵建昌,鞠学廷,等.隔震加固多层建筑结构的非线性时程分析[J].水利与建筑工程学报,2009,7(3):146-148.
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