抗拔型三向隔震支座恢复力模型与力学性能研究  

Study on the Restoring Force Model and Mechanical Performance of Three-Dimensional Isolation Bearings with Anti-Pull Function

作　　者：刘彦伟 吴涛 彭涛 郝玉军 郭进 王军文[1,2] LIU Yanwei;WU Tao;PENG Tao;HAO Yujun;GUO Jin;WANG Junwen(School of Civil Engineering,Shijiazhuang Tiedao University,Shijiazhuang 050043,China;Key Laboratory of Roads and Railway Engineering Safety Control of Ministry of Education,Shijiazhuang Tiedao University,Shijiazhuang 050043,China)

机构地区：[1]石家庄铁道大学土木工程学院,石家庄050043 [2]石家庄铁道大学道路与铁道工程安全保障教育部重点实验室,石家庄050043

出　　处：《三峡大学学报(自然科学版)》2025年第3期66-73,共8页Journal of China Three Gorges University:Natural Sciences

基　　金：国家自然科学基金项目(52178493);河北省自然科学基金项目(E2019210215);石家庄铁道大学研究生创新资助项目(YC2023007)。

摘　　要：传统隔震支座不具备竖向隔震能力,且抗拔能力较差,基于水平隔震与竖向隔震功能分离的思想,设计了一种具有抗拔功能的三向隔震支座.阐明了抗拔型三向隔震支座的基本构造与工作原理,对其水平、竖向恢复力模型进行理论分析,并建立实体有限元模型,对支座的水平、竖向滞回性能及抗拔性能进行参数影响研究.结果表明:抗拔型三向隔震支座在水平和竖向均表现出优异的滞回性能.水平耗能与竖向压力、滑移幅值、摩擦系数呈正相关,水平等效刚度及阻尼比随竖向压力、摩擦系数增大而增大;竖向耗能与预压量、加载幅值呈正相关,竖向等效刚度随预压量的增加而增大,但随着加载幅值的增加而减小.抗拔装置发挥作用时,在设计竖向位移内抗拔刚度为零,但当抗拔位移达到设计位移后抗拔刚度可达415 kN/mm,在上拔力达到871 kN前,抗拔装置各部件均未屈服,表明支座抗拔能力较强.Since traditional isolation bearings have no vertical isolation ability and poor anti-pull ability,a three-dimensional isolation bearing with anti-pull function was designed based on the idea of separating horizontal and vertical seismic isolation functions.The fundamental construction and working principles of an anti-pull three-dimensional isolation bearing were elucidated,and the theoretical analyses of its horizontal and vertical restoring force models were conducted.The effects of parameters on the horizontal,vertical hysteresis and anti-pull performance of the bearings were studied by an established solid finite element model.The results show that the three-dimensional isolation bearings with anti-pull function exhibits excellent hysteresis performance in both horizontal and vertical directions.The horizontal energy dissipation of the bearing is positively correlated with vertical pressure,the slip amplitude,and friction coefficient.The horizontal equivalent stiffness and damping ratio increase with the increase of the vertical pressure and the friction coefficient.The vertical energy dissipation is positively correlated with the preload amount and the load amplitude. The vertical equivalent stiffness increases with the increase of the preload amount and decreases with the increase of the load amplitude. When the bearing is subjected to uplift force, the anti-pull stiffness is zero within the designed vertical displacement range. But when the anti-pull displacement reaches the designed displacement, the anti-pull stiffness can be up to 415 kN/mm. Before the uplift force reaches 871kN all components of the anti-pull device have not yielding, which indicates that the bearing has a great anti-pull ability.

关 键 词：抗拔型三向支座 恢复力模型 数值模拟 力学性能 减隔震支座 

分 类 号：U443.36[建筑科学—桥梁与隧道工程]