厦门海沧大桥桥面沥青铺装层直道疲劳试验研究

Research on fatigue tests in the direct track for the asphalt deck pavement of Xiamen Haicang steel bridge

为制订交通部《钢桥铺装设计施工规程》,结合厦门海沧大桥的施工方案 ,进行了 6种沥青混凝土典型铺装的直道疲劳试验。研究了铺装层应力场分布 ,回归统计了随轴载作用次数增加 ,应力应变的变化规律。根据直道疲劳试验结果 ,预测了 6种典型铺装方案的疲劳寿命。

In order to develop 'Construction Regulation for Deck Pavement Design for Steel Bridges', 6 types of direct track fatigue tests of typical pavement are carried out with the combination of the construction program for Xiamen Haicang bridge, and the stress fick distribution in the paving layer is studied. The regression statistical method has been used to analyze the law of stress and strain as the times under the function of axial load increases. In line with the result of the direct track fatigue tests, the fatigue life for 6 typical paving programs has been predicted.