目 录 第 4 章 虎门大桥正交异性钢桥面板疲劳问题研究 ................................................................................. 2 4 .1 绪论 .......................................................................................................................................................... 2 4 .1 .1 正交异性钢桥面板的发展概况 ............................................................................................... 2 4 .1 .2 正交异性钢桥面板的疲劳细节 ............................................................................................... 9 4 .2 虎门大桥疲劳裂纹现状及成因 ............................................................................................................ 1 8 4 .2 .1 虎门大桥疲劳裂纹现状 ......................................................................................................... 1 8 4 .2 .2 虎门大桥疲劳裂纹的成因分析 ............................................................................................. 2 2 4 .3 正交异性钢桥面板局部应力分析 ........................................................................................................ 2 8 4 .3 .1 有限元分析模型 ..................................................................................................................... 2 8 4 .3 .2 单轮荷载作用下桥面板应力分布 ......................................................................................... 3 0 4 .3 .3 跨中加载时横隔板处应力分析 ............................................................................................. 3 3 4 .3 .4 轮压荷载接触面积的影响分析 ............................................................................................. 3 3 4 .3 .5 双轴作用下桥面板应力分布 ............................................................................................... 3 4 4 .3 .6 结论 ..............................................................................................
