玉树地震桥梁震害维修及加固措施

Yushu earthquake caused bridge damage and reinforcement measures

根据青海省玉树州高寒区的地域特点,结合交通运输部公路科学研究院《玉树地震中G214、S308沿线桥梁调查评估报告》项目,对玉树地区桥梁抗震性能和破坏程度进行了抽样调查与结果分析。结果表明:玉树地区桥梁结构主要为梁式桥;结构形式为简支梁桥和连续梁桥;震害表现形式分为支承破坏及落梁、桥墩损伤或破坏、地基震害、伸缩缝或桥面连续破坏、主梁结构性损伤、桥台损伤或破坏6种类型。同时,以玉树G214线上的禅古寺一号桥梁的破坏为主要的典型案例,对玉树高寒地区的桥梁抗震加固措施进行了探讨,并就维修加固和新建设计方面提出了抗震加固措施的建议。

According to the high altitude and cold characteristics in Yushu of Qinghai and combined with the Assessment Report of Bridge Survey along S308 and G214 in Yushu Earthquake made by the Department Of Transportation Highway Traffic Scientific Research Institute.A sample survey was conducted to assess bridge anti-shock performance and damage.Analysis results show that,in Yushu,the bridge structure is mainly the beam bridge type and the bridge structure is the beam bridge and continuous girder bridge.Six major damage types are supporting damage and fall beam,bridge pier damage or destroy,foundation damage,expansion joints or bridge deck continuous damage,main structural damage and abutment damage or destroy.One bridge near Changu Temple along G214 was used as typical case to explore reinforcement measures.The maintenance,reinforcement and design of the seismic strengthening measures were put forward.