摘要
针对首层悬臂柱无拉梁柱顶隔震结构和有拉梁柱顶隔震结构,在相同设防烈度下对其进行三维有限元时程分析,研究了悬臂柱截面尺寸的改变对这两种不同结构在考虑P-Δ效应和不考虑P-Δ效应情况下动力响应的影响,并比较二阶效应对结构的影响。结果表明:是否考虑P-Δ效应和有无拉梁对上部结构和隔震层的动力响应影响并不明显,而对悬臂柱的地震响应的影响较大;考虑P-Δ效应时,悬臂柱的层间位移角比不考虑P-Δ效应时有明显的增加,且P-Δ效应对结构的影响会随着悬臂柱截面尺寸的增大而减小;拉梁的设置能明显减小悬臂柱的层间位移角并降低P-Δ效应的影响。
For the first-floor column top isolation structure without straining beam and the column top isolation structure with straining beam,the three-dimensional finite element analysis of the structure is carried out under the same fortification intensity. The influence of the change the section dimension of the cantilever column on the dynamic response of the two different structures considering the P-Δeffects or no P-Δ effects is studied,including comparing the influence of the second-order effect on the structure. The results show that it is not obvious whether to consider the P-Δ effects and straining beam to the dynamic response of upper structure and isolation layer,but the influence on the seismic response of the cantilever column is great. The interlayer displacement angle of the cantilever columns considering the P-Δ effects is greater than the value that P-Δ effects is not considered,and the influence of P-Δ effects decreases with the increase of the section size of the cantilever column. The setting of straining beam can obviously reduce the interlayer displacement angle of the cantilever column and the influence of the P-Δ effects.
作者
秦熙
刘彦辉
陈望
金建敏
Qin Xi;Liu Yan-hui;Chen Wang;Jin Jian-min(Cultivation Base for Sate Key Ixiboratory of Seismic Control and Structural Safely, Guangzhou University, Guangzhou 510405,China)
出处
《工程抗震与加固改造》
北大核心
2019年第4期41-48,共8页
Earthquake Resistant Engineering and Retrofitting
基金
国家自然科学基金项目(51778163)
广东省高校优秀青年教师培养计划项目(YQ2015124)
广州市高校科研项目(1201610135,1201620162)
关键词
柱顶隔震结构
悬臂柱
拉梁
P-Δ效应
动力响应
structure with isolators on the top of the column
cantilever column
straining beam
P-Δ effect
dynamic response
