归纳总结钢桥面铺装的主要破坏形式 ,是钢桥面铺装研究的基础和关键。在此基础上提出轴载换算指标 ,利用有限元软件及 SMA混合料和浇注式沥青混合料疲劳方程 ,推导了 2种沥青混合料的轴载换算公式 (对于SMA沥青混合料 ,其换算系数为 4 .72 ;对于浇注式沥青混合料 ,其换算系数为 4 .5 4 )。为方便使用及结构安全起见 ,换算系数统一取为 4 .72 Summarize the main damage forms of steel bridge deck pavement, which is the foundation and key of steel deck pavement research. On this basis, the axle load conversion index is put forward. Based on the finite element software and the fatigue equation of SMA mixture and pouring asphalt mixture, the axle load equations of two kinds of asphalt mixture are deduced (for SMA asphalt mixture, the conversion coefficient is 4 .72; pouring asphalt mixture, the conversion factor of 4.54). For ease of use and structural safety, the conversion factor is taken as unity at 4.72