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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。
According to the statistical analysis of traffic load of trunk highway in Henan Province, the paper analyzes the load characteristics of highway and its effect on the life-span cost of highway bridges according to the principle of stress equivalent of bridge structure, and compares the increase of the whole life cost of bridges before and after the bridge load level, Analysis results show that, according to the equivalent principle of the driveway load levels in Henan Province was significantly higher than the current national standards. Based on the situation of typical bridges in Henan Province and the structural dimension and reinforcement under highway -Ⅰ design load, with the improved grade of lane load as check load, the structure and reinforcement are more in line with the actual situation of highway bridges and Development trend, can be used as a basis for the development of highway bridge load standards.