基于动力p-y曲线法的曲线梁桥抗震性能研究  

Research on seismic performance of curved girder bridge based on dynamic p-y curve method

作　　者：焦驰宇[1,3] 张家辉 胡彪 李杨杰 JIAO Chiyu;ZHANG Jiahui;HU Biao;LI Yangjie(Top Innovation Center for Future Urban Design,Beijing University of Civil Engineering and Architecture,Beijing 100044,China;Beijing Higher Institution Engineering Research Center of Civil Engineering Structure and Renewable Material,Beijing University of Civil Engineering and Architecture,Beijing 100044,China;Large Multi-functional Shaking Table Array Laboratory,Beijing University of Civil Engineering and Architecture,Beijing 100044,China;Beijing General Municipal Engineering Design&Research Institute Co.,Ltd.,Beijing 100082,China)

机构地区：[1]北京建筑大学未来城市设计高精尖创新中心,北京100044 [2]北京建筑大学工程结构与新材料北京市高等学校工程研究中心,北京100044 [3]北京建筑大学大型多功能振动台阵实验室,北京100044 [4]北京市市政工程设计研究院总院有限公司,北京100082

出　　处：《地震工程与工程振动》2023年第2期93-102,共10页Earthquake Engineering and Engineering Dynamics

基　　金：国家自然科学基金项目(52078023,51508019,51908024);北京市优秀人才培养-青年拔尖个人(2015000026833ZK05);北京市自然科学基金面上项目(8162012,8194057);土木工程防灾国家重点实验室开放基金项目(SLDRCE-14-02)。

摘　　要：受空间耦合效应影响,国内外考虑桩-土-结构相互作用的曲线梁桥抗震性能的相关研究略显不足。基于此,文中以某匝道桥为工程背景,基于OpenSees平台,采用空间动力p-y曲线法开展了5种不同曲率半径、3种典型下部结构形式的15组动力非线性有限元数值模型对比研究,探讨了考虑桩-土-结构相互作用影响下曲线梁桥的地震响应规律。研究表明:曲线梁桥的法向结构响应量大于直线梁桥,切向结构响应规律相反;随着曲率半径的增加,曲线梁桥的各结构响应规律与直线梁桥逐渐接近;与考虑桩土效应的直线桥相比,在法向和切向上,曲线梁桥边墩和中墩的结构响应量差异大,随着曲率半径的增加,差异显著减小;对同一曲率半径的桥梁来说,下部结构中墩为独柱墩刚接体系时,该墩内力响应最大、位移响应最小,中墩为双柱加支座结构时,动力响应规律相反,直线梁桥的规律与此类似。文中研究结果可为曲线梁桥地震反应规律提供指导和建议。Due to the influence of spatial coupling effects,there is a slight lack of research on the seismic performance of curved beam bridges considering pile soil structure interaction both domestically and internationally.Based on this,this paper takes a ramp bridge as the engineering background,based on the OpenSees platform,and uses the spatial dynamic p-y curve method to carry out a comparative study of 15 groups of dynamic nonlinear finite element numerical models with five different curvature radius and three typical substructure forms.The seismic response law of curved girder bridge considering the influence of pile-soil-structure interaction is presented.The research shows that the normal structural response of the curved girder bridge is larger than that of the straight girder bridge,and the tangential structural response law is opposite.With the increase of the radius of curvature,the response law of each structure of the curved girder bridge is gradually close to that of the straight girder bridge.Compared with the straight bridge considering the pile-soil effect,the structural responses of the side piers and the middle piers of the curved girder bridge differ greatly in the normal and tangential directions,and the difference decreases significantly with the increase of the curvature radius.For bridges with the same curvature radius,when the middle pier of the substructure is a rigid-connected system of single-column piers,the internal force response of the pier is the largest and the displacement response is the smallest.The laws of bridges are similar.The results of this study can provide guidance and suggestions for the seismic response law of curved girder bridges.

关 键 词：曲线梁桥 桩基础 桩-土-结构动力相互作用 抗震性能 OPENSEES 

分 类 号：U448.21[建筑科学—桥梁与隧道工程] U442.55[交通运输工程—道路与铁道工程]