不同抗拉刚度支座隔震体系的地震响应分析

发布时间：2018-01-24 01:16

本文关键词： 高层建筑动力时程隔震支座提离模型　出处：《世界地震工程》2016年04期 　论文类型：期刊论文

【摘要】：采用大型通用软件Abaqus对某拟建高层建筑进行了隔震动力时程分析,隔震支座分别采用拉压等刚度(等刚度模型),拉压不等刚度(不等刚度模型)和释放抗拉刚度(提离模型)3种支座模型,对比了3种支座模型下隔震结构体系的弹性和弹塑性时程响应,包括层间位移角、基底剪力、隔震层位移、支座拉力和支座竖向位移。结果表明:(1)假定上部结构为弹性的隔震体系响应与相应弹塑性体系的响应存在一定的差异,建议罕遇地震分析采用弹塑性模型;(2)支座等刚度模型与不等刚度模型的支座拉力,弹性分析时明显大于规范限值,弹塑性分析时减小,但仍大于规范限值;(3)提离模型能避免支座受拉,而对上部结构弹塑性响应影响较小,对隔震层水平响应基本无影响。
[Abstract]:In this paper, a large scale general software Abaqus is used to analyze the dynamic history of isolation of a high-rise building, and the isolation support adopts the equal stiffness (equal stiffness model). The elastic and elastoplastic time history responses of isolated structure system under three kinds of support models are compared, including the displacement angle between the layers, and the three support models with unequal tensile stiffness (unequal stiffness model) and release tensile stiffness (lift off model). The results show that the response of the isolated system assuming the upper structure is elastic and that of the corresponding elastoplastic system is different from that of the corresponding elastoplastic system. It is suggested that the elastic-plastic model should be used in the analysis of rare earthquakes. (2) the bearing tensile force of the support iso-stiffness model and unequal stiffness model is obviously larger than the specified limit value in elastic analysis, and decreases in elastic-plastic analysis, but still larger than the normative limit value; The lifting model can avoid the tension of the bearing, but has little effect on the elastoplastic response of the superstructure, but has no effect on the horizontal response of the isolation layer.
【作者单位】：北京建筑大学土木与交通工程学院;中国建筑标准设计研究院;
【基金】：国家自然科学基金面上项目(51378047) 十二五国家科技支撑项目(2011BAJ08B03)
【分类号】：TU352.12
【正文快照】： 引言建筑隔震通过在建筑中设置柔性隔震层,减小地震能量向上部结构传递,降低上部结构的地震响应,提高其抗震安全性[1]。隔震技术在美国和日本得到广泛应用,国内正逐步推广,但由于隔震橡胶支座受拉问题没有得到有效解决,导致隔震技术在高层建筑,尤其是复杂高层建筑中的应用还不

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