地震作用下高层隔震结构高宽比限值计算  

Calculation of Limit of Height-width Ratio of Tall Isolated Structure Under Seismic Effect

作　　者：刘彦辉[1] 林港源 杨鹏程 金建敏[1] LIU Yanhui;LIN Gangyuan;YANG Pengcheng;JIN Jianmin(Cultivation Base for Sate Key Laboratory of Seismic Control and Structural Safety, Guangzhou University, Guangzhou 510405, China)

机构地区：[1]广州大学减震控制与结构安全国家重点实验室培育基地,广州510405

出　　处：《华南地震》2017年第4期79-87,共9页South China Journal of Seismology

基　　金：国家自然科学基金项目(51478131;51408142);广州市科技计划项目(201707010333);广东省高校优秀青年教师培养计划项目(YQ2015124);广州市高校重点科研项目(1201610135)

摘　　要：针对高层隔震结构体系,采用多质点体系,基于隔震结构在地震中不出现倾覆的条件,结构边缘隔震支座拉应力不超过1 MPa,压应力不超过30 MPa,推导了高层隔震结构的高宽比限值,并考虑了不同的设防烈度、场地条件和结构阻尼比的影响。分析高宽比限值与结构基本周期的关系,得知了结构的基本周期变化对高宽比限值的影响。以三跨高层基础隔震结构为例,计算了隔震支座最大位移为300 mm和400 mm时隔震结构的高宽比限值,分析结果为设计高层隔震结构时对高宽比的取值提供参考。Aimed to tall isolated structure, by adopting a multi-mass system and considering the condition that could keep tall isolated structure from overturning during earthquake, the tensile stress in isolation bearing under the edge of structure should not exceed 1 MPa, the compressive stress in isolation bearing under the edge of structure should not exceed 30 MPa, the paper derives the limit of height-width ratio formulas with consideration of the effects of different earthquake fortification intensities, site classifications, and damping ratios of isolated story. The paper analyzes the relationship between the limit of height-width ratio and the basic period of structure, and gets the effect of the change of structural basic period on the limit of height-width ratio.Taking the three-span tall base-isolated structure as an example, the paper calculates the high width ratio ofisolated structure with the maximum displacement of isolation bearing of 300 mm and 400 mm. The analysis results provide reference for the height-width ratio of Tall isolated structure.

关 键 词：高层隔震结构 高宽比限值 结构基本周期 

分 类 号：TU352.12[建筑科学—结构工程]