中文摘要：

为适应越来越多的海外工程建设,需要对不同国家桥梁设计规范进行全面对比与评价,基于结构可靠度基本原理与概率极限状态设计方法,建立了中国、美国、欧洲公路桥梁设计规范安全性及经济性的综合评价体系.考虑中美欧桥规的承载能力极限状态与正常使用极限状态,提出了评价基本指标“截面富余度”、“变形富余度”和“应力富余度”,以及评价核心指标“综合富余度”,并计算得到各富余度的分项权重.通过对桥梁工程通用图及实际工程案例的计算,欧美桥规的综合富余度计算结果大于中国桥规的计算结果,即相同材料强度条件下欧美桥规计算的工程实例的安全性更高,而中国桥规计算结果则经济性更好.中美欧公路桥规的综合评价体系能够较为客观、系统地定量评价中美欧桥梁设计规范的安全性与经济性.

英文摘要：

In order to adapt to the increasing number of overseas engineering constructions, it needs to compare and evaluate bridge design specifications among different countries in all aspects. Based on the structural reliability theory and limit states＇ design method a comprehensive evaluation system of Chinese, American and European specifications which evaluates the economy and security of different design specifications is established. Considering the ultimate limit state and serviceability limit state, this paper puts forward the evaluation of the basic indices ＇ section surplus＇ , ＇deformation surplus＇ and ＇stress surplus＇, and evaluation of the core index ＇comprehensive surplus＇, and calculates the weights of each surplus. According to the calculation on the standard drawings and real case studies, the Eurocodes and AASHTO give more comprehensive surplus than Chinese specifications. In other words, with the same material properties, the structure designed according to Euroeodes and AASHTO has higher structural resistance, while Chinese specification emphasize more on economical way. The comprehensive evaluation system is able to evaluate the security and economy of different bridge design specifications objectively and quantitatively.