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为研究石拱桥的全过程破坏演变规律,以重庆某跨径为60m的石拱桥为例,根据相似原理制作跨径6m的缩尺石拱桥试验模型作为研究对象,采用ANSYS对拱板在承受不同荷载等级下拱圈裂缝的产生、发展并出现塑性铰,最终结构破坏进行了数值仿真模拟,计算结果与试验结果进行了对比,得出裂缝随荷载不断增加的分布规律,研究了拱圈的失效模式,为研究同类型在役石拱桥破坏模式提供了理论依据和参考。
In order to study the evolution and failure of stone arch bridge during the whole process, taking a stone arch bridge with a span of 60m in Chongqing as an example, a 6m-scale test model of stone arch bridge with a span of 6m was made according to the similarity principle. The occurrence and development of arch cracks in the load level and the appearance of plastic hinge and the final structural failure are simulated by numerical simulation. The calculated results are compared with the experimental results. The distribution of fractures with increasing load is obtained, and the failure of the arch ring Mode, which provides a theoretical basis and reference for the research on the failure mode of the same type in-service stone arch bridge.