基于调查统计分析的干线公路荷载对

根据河南省境内干线公路交通荷载调查统计分析结果，按照桥梁结构应力等效的原则，分析干线公路荷载特性及对公路桥梁结构全寿命成本的影响，比较提高桥梁荷载等级前后桥梁的全寿命成本，分析结果表明，按照等效原则得出的河南省车道荷载等级明显高于现行国家标准。结合河南省典型桥梁状况，以公路-Ⅰ级设计荷载下的结构尺寸和配筋为基准，以等级提高后的车道荷载作为验算荷载调整结构尺寸和配筋后，更加符合公路桥梁的实际情况及发展趋势，可作为制定公路桥梁荷载标准的依据。

Effect of Traffic Load of Arterial Highway on Bridge Life-cycle Cost Based on Traffic Survey

Based on the survey statistics of arterial highway loading, the characteristic of traffic load on arterial highway in Henan Province was analysed, and the life-cycle costs before and after raising bridge loading grade was compared according to bridge stress equivalent principle. The analysis results show that the traffic load grade on highway  of Henan Province based on stress equivalent principle is obviously higher than the requirement in the current national standard. According to the status of typical highway bridges in Henan Province, it fits the current of highway bridge development using the structure size and reinforcement of the designed I-level road traffic load  as  the requirement and using higher loading grade for checking computations. The results can be used as a reference for making the highway bridge loading standard.