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Title:: Study on Seismic Response of High-rise Shear Wall Isolated Building Considering Velocity Pulse Ground Motion

作者:: 李瑞东¹; 宋廷苏¹; 2; 王林建¹; 2; (1.云南省地震局,云南昆明 650224; 2.深圳防灾减灾技术研究院,广东深圳 518003)

Author(s):: LI Ruidong¹; SONG Tingsu¹; 2; WANG Linjian¹; 2; (1.Yunnan Earthquake Agency,Kunming 650224,Yunnan,China)(2.Shenzhen Academy of Disaster Prevention and Reduction,Shenzhen 518003,Guangdong,China)

Keywords:: velocity pulse; isolation structure; epicenter distance; effective duration; amplification effect

摘要:: 针对昆明市某99.7 m高层剪力墙隔震建筑,使用90组非脉冲与速度脉冲型地震时程,按震中距及有效持时分别分为7类与6类后,对其结构进行中震及大震作用下的快速非线性分析。结果表明:①中震时,该结构非脉冲层间剪力与倾覆力矩均小于脉冲数值,且其比例随楼层增加而增大; ②大震时,速度脉冲对支座应力及位移的平均放大效应可达1.23～2.44倍,同时时程震中距为(50 km,70km],或有效持时为(40 s,50 s]时支座受脉冲作用放大效应影响最大; ③结构边缘的橡胶隔震支座拉应力、压应力、天然橡胶支座水平剪切力等受脉冲作用的影响更为明显。

Abstract:: 90 groups of non-pulse and pulse ground motions are divided into 7 and 6 categories according to epicenter distance and effective duration respectively,then input to a 99.7 m high-rise shear wall isolation building in Kunming for fast nonlinear analysis.The results show that:①Under the condition of fortification earthquake,the non-pulse inter-story shear force and overturning moment of the structure are less than the pulse values,and the proportion increases as the floor increases.②The average amplification effect of velocity pulse ground motions of isolation bearing is about 1.23～2.44 under rare earthquake.When the epicenter distance is(50 km,70 km] or the effective duration is(40 s,50 s],the effect of velocity pulse is the most significant.③The tensile and compressive stress of the rubber bearings at the edge of the structure,and the horizontal shear force of natural rubber bearings are more obviously affected by velocity pulse.