城市桥梁技术状况评定及动静载试验研究  

Dynamic and Static Load Test and Technical Status Assessment of Urban Bridge

作　　者：郑一峰[1] 雷刚[1] Zheng Yifeng;Lei Gang(College of Construction Engineering,Jilin University,Changchun 130026,China)

机构地区：[1]吉林大学建设工程学院,吉林长春130026

出　　处：《甘肃科学学报》2021年第2期101-107,127,共8页Journal of Gansu Sciences

基　　金：国家自然科学基金资助项目(51208224)。

摘　　要：城市桥梁在长时间运营中会受到自然、车辆、人为等因素的综合作用,使用状况会变差。通过技术状况评定和动静载试验判定服役期较长的城市桥梁的实际状况非常必要。技术状况评定可以直观地了解桥梁结构的运营状态;动静载试验是旧桥检测和养护的一项重要方法。以白山市西浑江大桥为例,对该桥进行技术状况评定,综合考虑桥面系、上部结构以及下部结构的技术状况来判定整桥的运营状态。结合动静载试验,分别测试该桥在动静载试验中的挠度、应变和动力特性参数,并与理论值进行比较。结果表明:该桥主梁刚度和强度满足设计要求,动力特性良好,但是应补修栏杆、人行道及桥面铺装。Urban bridges in the long run will be affected by the combination of natural factors,vehicles and human,and the condition will become worse.It is necessary to judge the actual condition of urban bridges with a long service life through technical condition assessment and dynamic and static load test.The technical condition assessment can evaluate the overall condition of the bridge and intuitively understand the operation state of the bridge structure.Dynamic and static load test is an important method for the detection and maintenance of old bridges.Taking the Xihunjiang Bridge in Baishan city as an example,the technical condition of the bridge is evaluated,and the operation condition of the whole bridge is determined by taking the technical condition of the bridge deck system,superstructure and substructure into comprehensive consideration.Combined with dynamic and static load test,the deflection,strain and dynamic characteristic parameters of the bridge were tested and compared with theoretical values.The results show that the stiffness and strength of the main girder meet the design requirements and the dynamic characteristics are good.However,the balustrade,sidewalk and bridge deck pavement should be repaired.

关 键 词：技术状况 动静载试验 挠度 应变 动力特性 

分 类 号：U448.21[建筑科学—桥梁与隧道工程]