在役大跨石拱桥极限承载力的影响因素

Influencing factors of ultimate bearing capacity of inservice long span stone arch bridge

采用双重非线性有限元方法,从荷载分布、温度影响、初始缺陷和结构损伤等几个方面对1座大跨度石拱桥的极限承载能力的影响进行研究,指出荷载类型和布置、结构初始几何缺陷和损伤对在役大跨石拱桥极限承载力有较大影响。

Using double nonlinear finite element method,the effects of several aspects-load distribution,temperature influence,initial imperfection and structural damage and so on,the ultimate bearing capacity of a long-span arch were studied.The results show that load types,loading arrangement,initial structure geometric imperfection and damage have great influence on the ultimate bearing capacity of existing large-span bridge.