变曲率摩擦摆系统优化设计及其有限元验证  

OPTIMIZATION DESIGN AND FEM VERIFICATION OF VARIABLE CURVATURE-FRICTION PENDULUM SYSTEMS

作　　者：林树潮 樊广利 亢晋军 周一君 LIN Shuchao;FAN Guangli;KANG Jinjun;ZHOU Yijun(Shaanxi Key Laboratory of Safety and Durability of Concrete Structures,Xijing University,Xi’an 710123,China;Post-Doctoral Mobile Station of Civil Engineering,School of Civil Engineering,Tianjin University,Tianjin 300072,China;College of Civil and Architectural Engineering,North China University of Science and Technology,Tangshan 063210,China)

机构地区：[1]西京学院陕西省混凝土结构安全与耐久性重点实验室,西安710123 [2]天津大学建筑工程学院土木工程博士后流动站,天津300072 [3]华北理工大学建筑工程学院,河北唐山063210

出　　处：《工业建筑》2021年第3期128-135,共8页Industrial Construction

摘　　要：为了满足大型建筑结构对不同地震动特别是长周期地震动的隔震需求,提出一种新型的双向变曲率摩擦摆隔震支座(BDVCFPB),根据摩擦摆支座基本原理详细设计了该BDVCFPB,深入研究了BDVCFPB的摩擦系数、曲率影响系数、隔震周期以及聚四氟乙烯(PTFE)板应力状态对支座性能的影响,最后采用有限元软件ABAQUS对BDVCFPB进行数值仿真分析。研究结果表明:滑块底面长度2 r较小时,PTFE板与滑动面不发生分离;仅滑块底面长度2 r较大时,PTFE板与滑动面才发生分离。设计位移处BDVCFPB的滞回曲线与理论模型相差略大;在滑块由设计位移处向平衡位置滑动过程中,凸弧段上BDVCFPB的滞回曲线与理论模型略有差异,而且2 r越大,差异越大。但总体上来说,BDVCFPB的水平力与位移滞回曲线和理论模型吻合较好。In order to meet the isolation demand of large-scale building structures under different earthquake action and long-period ground motion in particular,a new bidirectional variable curvature-friction pendulum bearing(BD VCFPB)was proposed,and designed in detail according to the basic principle of friction-pendulum bearing.Then,the influence of friction coefficients,influence coefficients of curvature,isolation periods and the stress states of polytetrafluoroethylene(PTFE)plates on the properties of the bearings were further studied.Finally,a series of numerical simulations was conducted on the bearing by ABAQUS.The results showed that there was no separation between PTFE plates and sliding surfaces when the length of the contact area for sliders 2 r was smaller;the PTFE plates were separated from the sliding surfaces when 2 r was larger.The hysteretic curves of the bearings were a little different from the ones of the theoretical model at the design displacement.In the process of the slider sliding from the position of design displacement to the position of equilibrium,the hysteretic curves of the bearings on the convex arc segment were slightly different from the ones of the theoretical model,and the larger the 2 r,the greater the difference.But as a whole,the hysteretic curves of the horizontal force and displacement for the bearings agreed well with the ones of the theoretical model.

关 键 词：变曲率摩擦摆系统 优化设计 有限元分析 PTFE板 滑动面 滑块 

分 类 号：TU352.12[建筑科学—结构工程]