防灾减灾工程学报2011，Vol.31Issue(1)：30-37,8.
低硬度大直径橡胶隔震支座竖向荷载作用下钢板应力研究
Research on Stresses of Steel Plates of Isolator with Large Diameter and Low IRHD Rubber under Vertical Loading
摘要
Abstract
Linear natural rubber bearing (LNR) isolators with large diameter and low IRHD rubber are analysed with FEM program. The stresses of the upper cover steel plate, the bottom cover steel plate and the inner steel plate of the isolator are researched. Some factors are considered, such as the constraints at the top of isolator, shear modules of the inner rubber, the ratio between thickness of one inner rubber and thickness of one inner steel plate etc. The results show that the maximum value of Mises stresses of the inner steel plate and the maximum value of normal stresses in the radius direction of the inner steel plate, are about 4 and 2.5 times the vertical pressures respectively; the stresses of steel of isolator are affected by the constraints at the top of isolator, especially for the upper cover steel plate of isolator. There is no effect on the stresses of the inner steel plate of isolator while changing shear modules of the inner rubber of isolator.The change of ratio between the diameter of core and the diameter of isolator will affect the distribution of the stresses of inner steel plate near the core. The ratio between thickness of inner rubber and thickness of inner steel plate has considerable influence on Mises stresses and normal stresses (in radial and circumferential direction of isolator) of the inner steel plate, but slight influence on the vertical normal stresses of the inner steel plate.关键词
橡胶隔震支座/竖向荷载/有限元/内部钢板/应力分析Key words
isolator/ vertical load/ FEM/ inner steel plate/ stress analysis分类
数理科学引用本文复制引用
沈朝勇,周敏辉,庄学真,金建敏,马玉宏,林佳,赵歆冬..低硬度大直径橡胶隔震支座竖向荷载作用下钢板应力研究[J].防灾减灾工程学报,2011,31(1):30-37,8.基金项目
国家自然科学基金重大研究计划项目(90815027)、广州大学减震控制与结构安全实验室开放基金项目(210407)资助 （90815027）
