利用收集到的WIM(Weight in Motion)卡车荷载数据,开展了建立基于可靠性理论的现有桥梁评估公式研究。通过选取国内8种常见桥梁形式计算出了目前现行桥梁设计规范的隐含可靠指标。结合我国现行桥梁设计规范与公路工程可靠度设计标准,建立了基于可靠性理论的现有桥梁承载力评估公式,结果可为我国已建桥梁评估、新桥设计规范的制定和修改提供一定的参考和对照。 Based on the collected weight in motion (WIM) truck load data, a new bridge assessment formula based on reliability theory was developed. By selecting eight kinds of common bridge forms in our country, the implicit and reliable indexes of current bridge design codes are calculated. According to the current bridge design code and the reliability design standard of highway engineering, the existing bridge bearing capacity assessment formula based on reliability theory is established, and the results can provide some reference for the evaluation of bridge construction in our country and the formulation and revision of the design code of Newbridge And control.