悬臂施工连续梁桥摩擦摆支座减隔震特征研究  

Study on Seismic Isolation Characteristics of Friction Pendulum Bearing for Cantilever Construction Continuous Beam Bridge

作　　者：聂利英[1] 潘子坚 邵云澜 韩刘 NIE Liying;PAN Zijian;SHAO Yunlan;HAN Liu(College of Civil and Transportation Engineering,Hohai University,Nanjing 210098,China)

机构地区：[1]河海大学土木与交通学院,南京210098

出　　处：《武汉理工大学学报(交通科学与工程版)》2025年第1期95-101,共7页Journal of Wuhan University of Technology(Transportation Science & Engineering)

基　　金：同济大学土木工程防灾国家重点实验室开放课题基金项目(SLDRCE-MB-02)。

摘　　要：文中以某悬臂施工连续梁桥为背景研究纵向摩擦摆支座减隔震特征.基于有限元分析,探讨支座主要影响参数、主墩与边墩墩底弯矩随支座摩擦系数变化规律相反的特点及机理.结果表明:摩擦系数是摩擦摆支座耗能减震主要控制参数;主墩与边墩减震耗能机理不同,主墩是通过支座摩擦力对上部梁体惯性力起隔震作用,边墩是上部梁体通过摩擦摆支座耗能抑制边墩自振.结合现行规范B类桥梁两阶段设计,展示该桥型摩擦摆支座下边墩控制设计的现象,并明确主、边墩各自的设计思路.Based on the cantilever construction of a continuous beam bridge,the seismic isolation characteristics of longitudinal friction pendulum bearings were studied.Based on the finite element analysis,the characteristics and mechanism of the main influence parameters of the bearing and the bending moment at the bottom of the main pier and the side pier changing with the friction coefficient of the bearing were discussed.The results show that the friction coefficient is the main control parameter of energy dissipation and vibration reduction of friction pendulum bearings.The main pier and the side pier have different energy dissipation mechanisms.The main pier is used to isolate the inertial force of the upper beam through the friction of the bearing,while the side pier is used to suppress the natural vibration of the side pier through the energy dissipation of the friction pendulum bearing.Combined with the two-stage design of Class B bridge in the current code,this paper shows the phenomenon of the control design of the lower pier of the friction pendulum bearing of this bridge type,and makes clear the design ideas of the main pier and the side pier respectively.

关 键 词：悬臂施工连续梁桥 摩擦摆支座 减隔震特征 边墩控制设计 

分 类 号：U452.28[建筑科学—桥梁与隧道工程]