摘要
为研究非对称斜吊杆异形人行拱桥力学特性及设计关键点,以该类型人行拱桥实际工程为背景,详述了该桥的设计流程及设计参数,采用有限元分析方法对结构进行了静、动力分析。通过引入变化程度指标,采用准静态分析方法分析了单根吊杆失效对桥梁静、动力响应的影响,并进行了桥梁强健性分析。研究结果表明:非对称斜吊杆异形拱桥吊杆拉力及结构内力呈非对称分布;单根吊杆失效对桥梁结构内力变化影响较为复杂,特殊位置吊杆失效会引起桥梁局部内力大幅增大,进而影响桥梁运营安全;单根吊杆失效对桥梁的部分敏感阶次自振频率影响较明显;该桥可以在不设置临时支撑的情况下,对吊杆进行逐根维修更换。
In order to study the mechanical behavior of asymmetrical inclined suspender special-shaped pedestrian arch bridges, based on an actual engineering of the certain type of pedestrian arch bridge, the process and key points of design the bridge were described, the static and dynamic analysis of the structure was carried out by using the finite element analysis method. The variation degree index was introduced, the quasi-static analysis method was used to analyze the influence of the failure of a single suspender on the bridge static and dynamic response and the bridge’s robustness. The results show that: the tensile force and structural internal force of the asymmetric inclined suspender special-shaped arch bridge are distributed asymmetrically;the failure of a single suspender has a complex influence on the change of the internal force of the bridge structure, and the failure of the suspender at some special positions will cause a large increase in the local internal force of the bridge;the failure of a single suspender has a significant impact on the natural vibration frequency of some sensitive orders of the bridge;the suspenders of the bridge can be repaired and replaced one by one without temporary support.
作者
邑强
周俊龙
刘晓敏
郭耀华
荣晓巍
YI Qiang;ZHOU Junlong;LIU Xiaomin;GUO Yaohua;RONG Xiaowei(China Construction Sixth Engineering Bureau Co.,Ltd.,Tianjin 300171,China;School of Civil Engineering,Tianjin University,Tianjin 300072,China)
出处
《建筑结构》
CSCD
北大核心
2022年第S02期599-605,共7页
Building Structure
基金
中建股份科技研发课题(CSCEC-2020-Z-21)
关键词
桥梁工程
拱桥
人行桥
异形拱
非对称斜吊杆
强健性
bridge engineering
arch bridge
foot bridge
special-shaped arch
asymmetric inclined suspender
robustness
