预应力混凝土系杆拱桥荷载试验与计算分析

对桥梁进行荷载试验是为了查明和鉴定其实际受力状况和质量的较为直观的手段.千秋大桥主桥为系杆拱桥,为了检验其运营13a后的实际结构状态和工作性能,对该桥进行了荷载试验研究,测定了结构关键截面的挠度和应变,并建立了桥梁的有限元模型,对不同加载状况进行了计算分析,将实际测试值与理论计算值进行比较,对桥梁的工作状态作出了评估.结果表明,该桥目前工作状况良好,若提升该桥设计荷载等级,需要对其上部结构进行加固处理.

Loading Test and Calculation Analysis for PC Tied Arch Bridge

Loading test is the visualized means for identifying the forces and qualities of a bridge. Qianqiu Bridge is a tied arch bridge that has operated for 13 years. Through the loading test, the working state of the bridge under the loading test was gained and the deflection and strain of key sections were determined. The finite element model of the bridge was established, and the different loading conditions were calculated and analyzed. Compared with theoretical calculation, the test results show that the working condition of the bridge is in order at present and that the superstructure shoulu be reinforced if the designing load grade needs to be improved.