高层混凝土纤维增强橡胶隔震结构设计及减震分析

Design and Damping Analysis of High-Rise Concrete Fiber Reinforced Rubber Isolation Structure

为提高高层混凝土结构的减震性能,设计高宽比分别为4、6、8的高层剪力墙结构,并在8度(0.20 g)设防烈度地震作用下进行水平向减震系数分析。研究结果表明:不同高宽比下结构加入隔震支座后结构周期增加均较为明显;随着结构高宽比的增加,隔震后周期延长的效果有减小的趋势,但隔震后前三阶周期仍是隔震前周期的1.9倍以上,依然有效地减少了传递到上部结构的水平地震作用;高宽比为4、6、8的高层剪力墙隔震结构的水平向减震系数分别为0.38、0.45、0.49。

In order to improve the damping performance of high-rise concrete structures,a high-rise shear wall structure with an aspect ratio of 4,6,8 was designed,and the horizontal damping coefficient analysis was carried out under 8 degree(0.20 g)fortification intensity earthquake.The results show that the structural period increases obviously after the isolation bearing is added to the structure under different aspect ratios.With the increase of the aspect ratio of the structure,the effect of prolonging the post-isolation period tends to decrease.However,the first three order periods after the isolation are still more than 1.9 times of the pre-isolation period,which still effectively reduces the horizontal seismic action transmitted to the superstructure.The damping coefficient of 4,6,8 ratio of high to width of the level of the high-rise shear wall structure is 0.38,0.45,0.49,respectively.