对高层建筑隔震设计中的一些关键问题进行研究,就规范中隔震设计方法的主要不足提出改进建议.采用规范设计反应谱进行高层隔震结构分析时,必须充分考虑结构高阶振型的影响,否则会大大低估结构减震效果.对规范中不同阻尼比的地震影响系数曲线修正方法进行讨论,对规范中采用的阻尼调整和形状参数提出修改建议.指出了规范中容易导致隔震支座受拉的不合理规定,提出了改进后的结构布置原则.并对规范中隔震支座面压控制的计算方法提出修正建议.
Some improvements for the design code were adviced. Using the code design response spectrum to analyze the seismic isolation structure in high-rise building, the vibration modes must be amply considered for calculation, otherwise the effect of the seismic control will be underestimated. The modification method for seismic influence coefficient curve with different damping ratios in the code was discussed, modification of the damping regulation and its shape parameters issued in code are proposed. The shear and compression properties of the laminated rubber, and sliding bearings were analyzed. It is pointed out that the irrationality of calculating method in the code is easy to result in the isolation bearing under the tension, then the correct design method to result in the isolatation under the compression. These analyses provide a theory for application and extending seismic isolation in high-rise buildings.