车辆拥堵对城市桥梁安全性和耐久性的影响

通过对大城市交通拥堵和桥梁使用现状的分析，提出桥上车辆拥堵是影响桥梁安全与耐久性的因素之一。分析了桥上车辆拥堵容易引起的桥梁病害。通过对车流特征的分析，提出了车辆拥堵荷载模式，计算了拥堵荷载在桥梁中产生的效应，结果表明拥堵荷载效应有可能超过设计荷载效应。文中结论可供桥梁设计、养护人员和交通管理部门参考。

Influence of Vehicle Jam on Security and Durability of Municipal Bridge

Based on analysis of present situation of traffic jam and bridges in big cities, it is found that vehicle jam is one of influence reasons of security and durability of bridges. Defect of bridges caused by vehicle jam is studied. Through studying the character of car flow, vehicle loading model under jam condition is established and load effect on bridge caused by jam is calculated. The result indicates that load effect caused by jam may be greater than which caused by design load. a reference for bridge designing.bridge maintaining and traffic management are would given.