考虑平面外倾斜影响的石拱桥数值模拟

摘要

为了研究平面外倾斜对石拱桥承载力影响，建立了石拱桥主拱圈及上部结构的三维有限元ANSYS模型，考虑主拱圈平面外倾斜，采用牛顿-拉普森法迭代算法计算桥面均布活荷载极限值，分析极限状态下主拱圈的受力及损伤状态，总结了主拱圈平面外倾斜对桥面承载能力的影响规律，为该类石拱桥的安全及损伤评估提供了理论依据。%In order to study the influence of out-of-plane tilt on the bearing capacity of stone arch bridge, considering the influence of out-of-plane tilt, a 3-D finite element model of the main arch and superstructure of stone arch bridge was established by ANSYS. The ultimate value of uniform live load for bridge deck was calculated by Newton-Raphson Method. Simultaneously, the state of stress and damage of the main arch was analyzed in the limit state. The influence of out-of-plane tilt of the main arch on deck carrying capacity can provide a theoretical basis for safety and damage assessment of this kind of stone arch bridge.