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通过对北京市某高柔度墩柱钢梯道桥建立SAP2000空间有限元梁、壳单元计算模型,分析了梯道桥在人群活荷载作用下梯道平台、横梁、纵梁、墩柱的应力、变位及其变化规律,为验证计算模型的准确性,桥梁施工后在桥梁的控制截面布置了应力、挠度等测点,进行了静力加载试验。通过计算与实测数据的对比分析,得出了此类梯道桥的受力特点,指出了此类桥梁的建模特点,为今后此类梯道桥的设计提供了有益的参考。
Through the establishment of SAP2000 space finite element beam and shell element calculation model for a high-flexibility pier steel ladder bridge in Beijing, the stress of the ladder bridge, platform, beam, stringer and pier under the live load of the crowd is analyzed , Displacement and its variation rule. In order to verify the accuracy of the calculation model, the test points of stress and deflection are arranged on the control section of the bridge after the construction of the bridge and the static loading test is carried out. Through the comparison and analysis of the calculated and measured data, the mechanical characteristics of such ladder bridges are obtained. The modeling characteristics of such bridges are pointed out, which provides a useful reference for the design of such ladder bridges in the future.