基于联合减震结构的振动台试验分析

Experimental analysis of shaking table based on combined vibration damping structure

通过在钢-混凝土混合结构中设置橡胶隔震支座及阻尼器的不同组合方式构成减震结构,并对结构进行了振动台试验。试验表明:橡胶隔震支座对隔震层和上部结构的加速度和位移均能起到很好的控制作用;在上部结构加设粘滞阻尼器之后,隔震层的加速度和位移均有所减小,但减小幅度不大,而顶层的加速度和位移均出现大幅度减小,梁、柱的应变减小超过50%,说明在设置隔震支座的基础上,通过布置粘滞阻尼器能达到较好的减震效果。

A series of shaking table tests of the steel-concrete hybrid structure are set up by changing thecombination method of rubber bearings and dampers.The test results show that the rubber bearing can perform awell controlling effect in the acceleration and displacement of both of the rubber bearing isolation layer and theupper structure.After the additional viscous dampers on upper structure are settled,both the acceleration and thedisplacement of the isolation layer are reduced,but the reduction is not quite obvious.Meanwhile,the accelerationand displacement of the top layer are decreased drastically,and also both the strain of its beams and columns arereduced more than50%,which means that placing a viscous damper on the basis of rubber bearings can achieve abetter damping effect.