【摘要】 白城市车站北道口公铁立交桥经多年使用,存在承载能力是否满足桥梁使用要求和如何延长其使用年限的问题.为确定北道口公铁立交桥承载能力,对其进行桥梁无损检测与载荷试验.试验结果表明:该桥总体技术状况等级为E级,属于危险状态,承载能力不满足使用要求.为提高承载能力延长其使用年限,文章提出采用结构体系转换由简支梁变连续梁和体外施加预应力两种方法进行加固处理的对策.更多还原

【Abstract】 Beidaokou highway-railway overpass bridge has been used many years. So,there is the problem of whether the carrying capacity meets the use requirements of the bridge and how to extend its service life.In this research,in order to determine its carrying capacity,the non-destructive test and the bearing capacity test have been done on Beidaokou highway-railway overpass. The results show that the overall technical status grade of this bridge is E,which is in a dangerous state,and its carrying capacity does not meet the use requirements. In order to improve the carrying capacity and extend its service life,there are two structural system conversion methods that can be used for reinforcement,simple-supporting to continuous and external prestressing.更多还原