多层框架整体平移后隔震连接的减震性能研究

Research on Seismic Reduction Behavior of Isolation Connection After Monolithic Translation of Multistoried Frame Structure

以对隔震连接的构造设计、滑动层材料的力学性能以及建筑物隔震性能进行了试验研究和数值模拟分析.结果表明,整体平移到位后结构具有隔震连接的便利条件;摩擦系数小于0.2的聚四氟乙烯板、不锈钢板等均可以作为滑动层材料;隔震效果随着摩擦系数的减小而提高,但滑动层的位移也随之增大,通过设置复位弹簧可以减小滑动位移,隔震效果随着复位弹簧刚度的增大而降低.提出以聚四氟乙烯板作为滑动材料,同时设置刚度为500 kN/m、最大压缩行程为150 mm的复位、限位弹簧的优化设计方案.

Experimental research and numerical simulation were carried out on the structure design of seismic isolation connection, the mechanics performance of slippage layer material and the seismic isolation capacity of the structure. The results show that the frame construction after translation has advantage for seismic isolation connection. Polyetrafluoroethylene boards and stainless steel plates with a friction coefficient less than 0. 2 can be used as slippage layer materials. Seismic isolation effect enhance with the decreasing of friction coefficient, but accretion of slippage layer displacement, which can be reduced by setting back-moving spring. As the rigidity of back-moving springs increase, the seismic isolation effect decrease. An optimal design scheme is brought forward, in which polyetrafluoroethylene plate is used as slippage layer material, the back-moving and limit spring have a 500 kN/m rigidity and a 150 mm maximum compression range.