基于新型摩擦滑移隔振装置的框架模型地震响应

Earthquake response of framework model based on a new type of frictional sliding isolation

基于二硫化钼这种摩擦滑移材料,设计并制作了1种新型摩擦滑移隔震支座,通过对该滑移支座进行相关的摩擦因数试验,获得了该装置摩擦因数计算公式。利用ABAQUS有限元分析软件,建立了应用该新型摩擦滑移隔振装置的5层试验框架及相应抗震结构的有限元分析模型,并探讨了该抗震与隔震结构模型在EL Centro波3种地震烈度水平单向输入下的位移和加速度响应的主要规律。研究结果表明:该新型摩擦滑移装置使得框架模型在隔震层以上仅发生刚体平动且层间位移较小的同时,各层加速度响应较之对应的抗震结构大幅降低,从而有效地改善了该类结构的抗震性能,保护了上部主体结构。

A new type of frictional sliding isolation bearing was designed and produced based on the frictional sliding material-molybdenum disulfide.Friction coefficient test was carried out for the sliding bearing,and friction coefficient formula for the device was obtained.Finite element analysis model for the 5-layer test framework with the new frictional sliding isolation device was established with ABAQUS finite element analysis software.The main laws of displacement and acceleration response for seismic structure and isolation structure model were researched under EL-Centro seismic wave with three intensity levels through horizontal unidirectional input.The results show that only rigid motion is allowed for the part of the structure above isolation layer and the story drift is much smaller,meanwhile,compared with seismic structure,the accelerationresponse is significantly reduced,which can effectively improve the seismic performance of the structure and protect the upper part of it.