东南大学学报（自然科学版）2017，Vol.47Issue(6)：1154-1160,7.DOI:10.3969/j.issn.1001-0505.2017.06.012
铅芯橡胶支座单元模型的开发及验证
Development and verification of element model for lead-rubber bearings
摘要
Abstract
To improve the accuracy and the efficiency of mechanical property calculations and analyses of lead-rubber bearings,the corresponding element model is proposed based on the OpenSees program.This model accounts for the coupled bidirectional response and the isotropic behavior of circular bearings.Furthermore,the variation of the compression stiffness and the critical load with the change of lateral displacement and the effects of the loading history on the cumulative damage and cavitation strength reduction in the tensile direction of bearings are considered.To validate the effectiveness of this element model,simulation analyses are conducted for the bi-directional displacement-controlled tests,the cyclic tensile load tests and the steel-truss isolated bridge dynamic tests,respectively.The results show that this numerical model can reasonably simulate the mechanical behaviors of bearings.The response performance of the bearings under earthquake ground motions can be described accurately by considering the variation of the beatings' mechanical characteristics.The proposed model provides a foundation for further investigation of the response analyses on seismic isolated structures.关键词
铅芯橡胶支座/水平双向耦合/竖向压缩刚度/验证Key words
lead-rubber bearings/horizontal bidirectional coupling/vertical compression stiffness/verification分类
建筑与水利引用本文复制引用
周通,李爱群..铅芯橡胶支座单元模型的开发及验证[J].东南大学学报（自然科学版）,2017,47(6):1154-1160,7.基金项目
国家自然科学基金重点资助项目(51438002)、国家自然科学基金资助项目(51278104). （51438002）
