摘要
本文针对某实际高层隔震结构,对比分析了考虑重力荷载与地震非线性组合与传统线性组合情况下,5种不同拉压刚度比对罕遇地震作用下支座最大拉应力、最大压应力和最大位移的影响,同时在考虑非线性组合的前提下,对比了不同结构高度下,不同支座拉压刚度比对三个抗倾覆性能指标的影响。分析结果表明:1相对于线性组合的分析方法,非线性组合下,支座拉压刚度比的变化对于三个抗倾覆性能指标影响不显著;2结构高度增加,拉压刚度比的变化对隔震层中受拉最不利位置支座的拉应力计算结果差异性影响降低;3非线性组合下,随着拉压刚度比的增加,受拉最不利支座的拉应力也相应增加,基于工程设计安全富余的考虑,建议在非线性组合时隔震支座拉压刚度比采用1/5进行设计。
In this paper,a new analysis method considering the nonlinear combination of gravity and seismic（ NCOGAS） is introduced in time history analysis of a practical isolated high-rise structure. Based on considering NCOGAS,the influence on the tensile stress,pressure stress and displacement under rare earthquake intensity caused by different rubber bearing tensile and compression stiffness ratios is discussed. The comparison analysis shows： 1compared with the conventional analysis method without considering NCOGAS,the three items are insensitive to the change of the ratio considering the NCOGAS and the insensitivity remains even when the height of the building increases; 2 the max deviation of the tensile stress decreases with the increase of the structure height; 3 under the NCOGAS,the tensile stress of the most dangerous rubber bearings increases with the increase of the tensile and compression stiffness ratio,so it＇s more secure to take the ratio of 1 /5 in practical analysis to ensure the safety guarantee.
出处
《工程抗震与加固改造》
北大核心
2016年第1期52-59,共8页
Earthquake Resistant Engineering and Retrofitting
基金
教育部"创新团队发展计划"(IRT13057)
广东省自然科学基金研究团队项目(8351009101000001)
广州市高校"羊城学者"科研项目(10A026S)
关键词
重力荷载与地震作用非线性组合
高层隔震
隔震支座拉压刚度比
抗倾覆性能
nonlinear combination of gravity and seismic
high-rise isolation structure
rubber bearing tensile and compression stiffness ratio
antidumping performance
