橡胶隔震支座竖向性能试验研究.PDF

25 2 2006 4 Vol.25 No.2 Journal of Liaoning Technical University Apr. 2006 文章编号 1008-0562(2006)02-0217-03 橡胶隔震支座竖向性能试验研究 1 2 1 1 (1.北京工业大学 工程抗震与结构诊治北京市重点实验室 北京 100022; 2.广州大学 工程抗震研究中心 广东 广州 510405) 摘 要 为了全面评价隔震橡胶支座的竖向性能 特别是在压缩剪切变形状态下的竖向性能 对铅芯橡胶支座和天然橡胶支座的竖 向性能进行了试验研究 分析了这两种隔震支座在压缩剪切变形状态下偏压竖向刚度以及竖向变形量等特性 结果是随着剪切变形的 增加 隔震橡胶支座的竖向刚度逐渐减小 由剪切变形和竖向压力产生的竖向沉降量的比例是不断变化的 因此 在全面评价橡胶隔 震支座特性时 单纯压缩竖向刚度不足以全面反应橡胶隔震支座的竖向压缩性能 关键词 橡胶隔震支座 竖向变形 压缩剪切变形 偏压竖向刚度 中图分类号 TU 352.1 文献标识码 A Test study on vertical property of rubber isolators 1 2 1 1 HAN Qiang , LIU Wen-guang , DU Xiu-li , ZHAO Jian-feng (1. Beijing Lab of Earthquake Engineering and Structural Retrofit, Beijing University of Technology ,Beijing 100022, China 2. EERTC, Guangzhou University, Guangzhou 510405, China) Abstract In order to reveal the evaluate property of rubber isolators, especially the vertical property at shear-compression deformation, vertical property tests of rubber isolators at shear-compression are performed with different parameters. The biasing pressure vertical stiffness and vertical deformation properties at shear-compression state are studied. The vertical stiffness decreases with shear deformation increase and the ratio of quantity of vertical deformation producing shear deformation and vertical stress is variable. So the pure vertical compressive stiffness is not enough estimated with vertical compressive property of rubber isolator. Key words rubber isolators vertical deformation shear-compression deformation biasing pressure vertical stiff