近场高烈度区高层框筒结构组合隔震设计与分析

Analysis and Design of the Combined Isolation in High-rise Frame Core Tube Structure near Field Earthquake Zone of High Intensity

针对高烈度近场地震区的高层框架-核心筒结构,提出了橡胶隔震支座和弹性滑板支座的组合隔震设计思路。采用时程分析方法对比计算了结构采用传统抗震与隔震技术在地震作用下的层剪力、层间位移角、楼层加速度、支座应力和地震能量耗散情况。研究结果表明:多遇地震下,组合隔震结构楼层位移与加速度的衰减幅值达54%和60%;罕遇地震下支座的拉应力和位移都控制在规范限值内,橡胶隔震支座和弹性滑板支座的滞回曲线均饱满,从滞回曲线可得知两种支座同时进入屈服,表明在该组合隔震设计中,两种支座具有良好的协同工作性,验证了该组合隔震设计的合理性。

For high-rise frame core tube structure in the near high intensity earthquake zone, the design thinking of the combination with the elastic slide bearing （ESB） and rubber isolator bearing is put forward. The story shear, inter-story displacement angle, floor acceleration, bearing stress and seismic energy dissipation corresponding to the traditional seismic and seismic isolation technology cah＇ulated by time history analysis method are compared. Research results show that under frequently occurred earthquake action, the floor displacement and acceleration of the combined isolation structure are decreased by 54% and 60% ; under rareearthquake, tensile stress and displacement of the bearing are controlled within the specification limits, the hysteresis curves of rubber isolator bearing and ESB are full, as can be seen from the hysteresis curves, the two kinds of bearings at the same time to enter the yield states, is shows that the two kinds of bearing have good collaborative workability in the design of the combined isolation system, and the rationality of the combined isolation design is verified.