某中承式混凝土系杆拱桥坍塌原因分析与研究

Analysis and Study on Collapsing Cause of a Half-through Concrete Bowstring Arch Bridge

通过分析一座坍塌的中承式混凝土系杆拱桥的受力体系,并在对其各主要构件进行现场检查后,表明该拱桥吊杆系统的失效是导致该桥整体失效的首要内在原因。接着,研究了致使吊杆系统失效的各因素并阐述对吊杆检测的相关方法,提出了该类型拱桥设计、检查及养护的重点。

After the analysis on the stress system of a collapsed half-through concrete bowstring arch bridge and the field inspection of its main members, the result shows that the failure of this arch bridge suspender system is the primary intrinsic reason leading to the whole failure of this bridge. The article studies various factors making the failure of suspender system, sets forth the relative methods of suspender inspection, and puts forward the gist in the design, inspection and maintenance of this arch bridge.