Bound of aspect ratio of base-isolated buildings considering nonlinear tensile behavior of rubber bearing
Bound of aspect ratio of base-isolated buildings considering nonlinear tensile behavior of rubber bearing
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DOI：
10.12989/sem.2008.30.3.351
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发表时间：
2008-10
影响因子：
2.2
通讯作者：
J. Hino;S. Yoshitomi;M. Tsuji;I. Takewaki
中科院分区：
文献类型：
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作者：
J. Hino;S. Yoshitomi;M. Tsuji;I. Takewaki
本文的目的是提出一种基础隔震橡胶支座在地震作用下轴向变形的简单分析方法，并将其应用于基础隔震建筑高宽比的限值分析。引入了基本剪切系数作为边界分析的关键参数。根据以下四个参数的关系分析了基础隔震建筑高宽比的界限：(I)基于地震荷载简单递推分析的橡胶支座拉应力的极限状态；(Ii)基础隔震层在地震荷载作用下的极限漂移状态；(Iii)恒载作用下橡胶支座轴向压应力的极限状态；(Iv)地震荷载作用下基础倾覆力矩的预测。特别是考虑了橡胶支座的非线性拉伸行为，提出了一种新的橡胶支座轴向变形递推分析方法，结果表明，放松对橡胶支座拉应力极限状态的约束，提高了极限高宽比。
The purpose of this paper is to propose a simple analysis method of axial deformation of base-isolation rubber bearings in a building subjected to earthquake loading and present its applicability to the analysis of the bound of the aspect ratio of base-isolated buildings. The base shear coefficient is introduced as a key parameter for the bound analysis. The bound of the aspect ratio of base-isolated buildings is analyzed based on the relationship of the following four quantities; (i) ultimate state of the tensile stress of rubber bearings based on a proposed simple recursive analysis for seismic loading, (ii) ultimate state of drift of the base-isolation story for seismic loading, (iii) ultimate state of the axial compressive stress of rubber bearings under dead loads, (iv) prediction of the overturning moment at the base for seismic loading. In particular, a new recursive analysis method of axial deformation of rubber bearings is presented taking into account the nonlinear tensile behavior of rubber bearings and it is shown that the relaxation of the constraint on the ultimate state of the tensile stress of rubber bearings increases the limiting aspect ratio.