市政技术2025，Vol.43Issue(9)：21-28,99,9.DOI:10.19922/j.1009-7767.2025.09.021
新型组合橡胶减震支座及其应用研究
Research on Novel Composite Rubber Seismic Isolation Bearings and Applications
摘要
Abstract
Small-and-medium-span bridges are widely used in China,typically with prefabricated upper-structures supported on rubber bearings.Based on a brief investigation of common seismic isolation rubber bearings,a novel composite rubber seismic isolation bearing(CRB)was proposed,which features simple structure,cost-effectiveness,environmental friendliness,durability,easy replacement,as well as good deformation,energy dissipation,and self-centering capacities.First,the structure and mechanical principles of the new bearing were introduced;Then,a se-ries of bearing tests were conducted to verify the vertical and horizontal performance of CRBs,and the equivalent bilinear restoring force model was derived;Finally,taking a typical prefabricated bridge as an example,the seismic performance of different reduction schemes including laminated rubber bearings(LBs),lead rubber bearings(LRBs),and CRBs were comparatively studied by nonlinear dynamic time history analysis method.The results show that the CRBs have a larger vertical stiffness,a lower horizontal equivalent stiffness,a strong damping capacity than LBs,and can avoid bearing sliding even under large displacements,with less residual deformation;The CRBs can effec-tively reduce the pier responses more than LBs and LRBs,demonstrating excellent isolation performance.关键词
组合橡胶减震支座/支座试验/非线性动力时程分析/抗震性能/残余变形Key words
CRB/bearing tests/nonlinear dynamic time history analysis/seismic performance/residual deformation分类
建筑与水利引用本文复制引用
邓小伟,钟海强..新型组合橡胶减震支座及其应用研究[J].市政技术,2025,43(9):21-28,99,9.基金项目
上海市青年科技启明星计划(21QB1406000) （21QB1406000）
