中国铁道科学2018，Vol.39Issue(3)：31-40,10.DOI:10.3969/j.issn.1001-4632.2018.03.05
罕遇地震作用下连续梁桥双曲面摩擦摆支座参数优化及减震效果研究
Parameter Optimization and Damping Effect of Hyperbolic Surface Friction Pendulum Bearing for Continuous Girder Bridge under Rare Earthquake
摘要
Abstract
Research on the parameter optimization and damping effect of hyperbolic surface friction pendulum bearing for multi-span and long-unit continuous girder bridge under rare earthquake was carried out based on the practical engineering background of the (55+4× 90+55) m long main bridge of Hanjiang super large bridge.The bridge dynamic analysis model was established by general finite element software ANSYS.The nonlinear dynamic time-history analysis method was employed to analyze the parametric sensitivity of sliding friction coefficient and the radius of curvature for hyperbolic surface friction pendulum bearing,and compared with the seismic responses without hyperbolic surface friction pendulum bearing.Results show that the internal forces at the bottom of braking pier and the displacements at the top of bra king pier decrease as the curvature radius of bearing increases,and tend to decrease first and then increase as the friction coefficient of bearing increases.The relative displacement between the pier and beam and the displacement of friction pendulum bearing increase as the curvature radius of bearing increases and decrease as the friction coefficient of bearing increases.The horizontal shear force of friction pendulum bearing decreases as the curvature radius of bearing increases,the influence of the friction coefficient of bearing on horizontal shear force is not obvious.The damping effect and economic benefit of hyperbolic surface friction pendulum bearing are comprehensively taken into account together with the characteristics of multi-span and long-unit bridge.It is suggested that the sliding friction coefficient of hyperbolic surface friction pendulum bearing should be 0.03,and the radius curvature of bearing should be 3 m.关键词
桥梁工程/多跨长联连续梁桥/双曲面摩擦摆支座/减隔震/非线性动力时程分析/参数优化Key words
Bridge engineering/Multi-span and long-unit continuous girder bridge/Hyperbolic surface friction pendulum bearing/Seismic mitigation and isolation/Nonlinear dynamic time-history analysis/Parameter optimization分类
交通工程引用本文复制引用
贾毅,赵人达,廖平,占玉林,李福海..罕遇地震作用下连续梁桥双曲面摩擦摆支座参数优化及减震效果研究[J].中国铁道科学,2018,39(3):31-40,10.基金项目
国家重点研发计划项目(2016YFB1200401) （2016YFB1200401）
国家自然科学基金资助项目(51308471,51778531) （51308471,51778531）
广东省交通厅科技计划项目(2014-02-015) （2014-02-015）
