中文摘要：

对7块钢板-轻骨料混凝土空心组合桥面板和2块钢板-普通混凝土空心组合桥面板进行了疲劳试验研究,主要考察了疲劳荷载作用下组合板中钢管的布置形式、疲劳荷载幅值、疲劳荷载上下限、疲劳加载次数及混凝土材料特性5个关键因素对空心组合桥面板疲劳破坏形态、疲劳刚度退化、疲劳动力响应及疲劳强度等疲劳性能的影响。结果表明：2种钢管布置形式的空心组合桥面板的疲劳破坏形态都是底部钢板发生疲劳断裂导致整体失效破坏;组合桥面板疲劳循坏加载次数主要由疲劳荷载幅值控制,与疲劳荷载上限关系不明显;钢板-普通混凝土组合桥面板疲劳性能优于钢板-轻骨料混凝土组合桥面板;组合桥面板疲劳破坏主要是由于底部钢板疲劳断裂破坏所致,在组合桥面板中未发现组合桥面板组合作用的明显疲劳破坏现象;组合桥面板疲劳寿命计算主要为底部钢板疲劳强度计算,可以采用基于疲劳荷载幅值方法所建立的钢结构疲劳寿命理论进行计算。

英文摘要：

Fatigue tests of seven steel plate-light concrete hollow composite decks and two steel plate-common concrete composite decks were conducted.Five main factors,such as layout type of steel tube,fatigue load amplitude,upper and lower limit of fatigue load,fatigue load times and performance of concrete material were chosen,and their influences on fatigue failure mode,fatigue rigidity degeneration,fatigue dynamics response and fatigue strength of composite deck under fatigue load were studied.Results show that failure modes of specimens with layout types of two steel tubes are all caused by fatigue cracking of the bottom steel plate which results in overall failure of each specimen.The times of fatigue cycles are mainly controlled by loading amplitude,and haven＇t a direct relationship with upper limit of fatigue load.The fatigue performances of specimens with common concrete are better than those with light concrete.The failure mode of hollow composite deck is fracture of bottom steel plate.The degenerations of composite action and failure of the composite decks are not found in the test.Calculation of fatigue life of composite deck which mainly presents calculation of fatigue strength of bottom steel plate can be calculated by fatigue life theory of steel structure based on method of fatigue load amplitude.