Analysis of Infinite‐Strip‐Shaped Base Isolator with Elastomer Bulk Compression
Analysis of Infinite‐Strip‐Shaped Base Isolator with Elastomer Bulk Compression
复制标题
弹性体体积压缩无限条形底座隔振器分析
DOI：
10.1061/(asce)0733-9399(1991)117:8(1791
复制
发表时间：
1991
期刊：
影响因子：
--
通讯作者：
J. Kelly
中科院分区：
文献类型：
--
作者：
M. Chalhoub;J. Kelly
多层橡胶支座是基础隔震系统中的基本构件。过去开发和使用的几个设计公式将弹性体视为不可压缩的。本文考虑了体积压缩性的影响，针对具有长矩形横截面的衬垫，推导并求解了弹性体中静水压力的控制方程。所得的表达式进行了简化，并推荐用于弹性支座的设计。包括体积压缩性的影响的公式预测这种轴承的真实的行为比传统使用的更准确。橡胶垫的抗压刚度和抗弯刚度以及其承载表面上的压力分布取决于弹性体的体积可压缩性，并且这种依赖性对于较大的形状因子更为显著。
Multilayered elastomeric bearings are a basic component in base isolation systems. Several design formulas that have been developed and used in the past consider the elastomer as incompressible. In this paper, the effect of bulk compressibility is included, and the governing equations for the hydrostatic pressure in the elastomer are developed and solved for a pad with a long, rectangular cross section. The resulting expressions are simplified and recommended for the design of elastomeric bearings. The formulas that include the effect of bulk compressibility predict the real behavior of such bearings more accurately than the conventionally used ones. The compressive and flexural stiffnesses of a rubber pad and the pressure distribution on its loaded surface depend on the bulk compressibility of the elastomer, and this dependence is more significant for larger shape factors.