底层框架砌体房屋层间隔震动力时程分析
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摘要
尝试将隔震支座搁置在底部框架柱的顶部来加固加层的底层框架砌体房屋。针对一栋加层的底层框架砌体房屋,在ANSYS中建立了层间隔震结构和非隔震结构的模型。在程序中,用组合单元来模拟隔震层,隔震层参照双线性库仑摩擦阻尼恢复力模型和粘滞阻尼恢复力模型。进行了两类结构的动力特性分析。得出两类结构的自振周期和振型。结果表明,层间隔震结构的自振周期比非隔震结构的自振周期明显要长。进行了两类结构的动力时程分析。得出在地震作用下两类结构各部分的位移幅值和加速度幅值。得出两类结构各部分的位移和加速度动力时程曲线。最后,对计算结果进行了分析,得出一些有意义的结果和结论。
It is attempted to put the isolation bearing on the top of the bottom column to strengthen the adding storey masonry building with frame structure in the first storey.To an adding storey masonry building with frame structure in the first storey,modals of the non-isolated structure and the interlayer seismic isolation structure are made in ANSYS.In the program,combined elements were used to simulating the isolation storey,the bi-linear coulomb damping hysteresis model and the viscous damping hysteresis model were used for the isolation storey.By analyzing the dynamic characteristics of the two structure,the natural vibration period and the mode of the two structure were obtained.It turned out that the natural vibration period of the interlayer seismic isolation structure is longer than the natural vibration period of the non-isolated structure.The dynamic time history was analyzed on the two structure,and the maximum displacement and acceleration of all the parts of the two structure under earthquake were got.Whose time history curves of the displacement and acceleration were obtained.At last,the calculation result was analyzed.Some useful results and conclusions were given.
It is attempted to put the isolation bearing on the top of the bottom column to strengthen the adding storey masonry building with frame structure in the first storey.To an adding storey masonry building with frame structure in the first storey,modals of the non-isolated structure and the interlayer seismic isolation structure are made in ANSYS.In the program,combined elements were used to simulating the isolation storey,the bi-linear coulomb damping hysteresis model and the viscous damping hysteresis model were used for the isolation storey.By analyzing the dynamic characteristics of the two structure,the natural vibration period and the mode of the two structure were obtained.It turned out that the natural vibration period of the interlayer seismic isolation structure is longer than the natural vibration period of the non-isolated structure.The dynamic time history was analyzed on the two structure,and the maximum displacement and acceleration of all the parts of the two structure under earthquake were got.Whose time history curves of the displacement and acceleration were obtained.At last,the calculation result was analyzed.Some useful results and conclusions were given.
引文
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[2]李梨,李键,唐家祥.用隔震技术提高已有建筑的抗震能力[J].华中科技大学学报,2002,19(1):68-72.
[3]易文宗,史庆轩.多孔砖砌体的力学性能试验研究[J].西安建筑科技大学学报,1998,30(3):221-22.
[4]赵昕,李杰.层间隔震结构隔震垫的有限元模拟[J].建筑结构,2001(11):66-68.
[5]朱玉华,吕西林.组合基础隔震系统地震反应分析[J].土木工程学报,2004(4):76-81.
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