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中山异型拱桥是由两条倾斜的钢拱肋、桥面曲线钢箱梁及倾斜的吊杆组成的多元空间体系,属于特殊的空间钢肋拱桥,受力复杂。为研究其力学行为,进行了缩尺模型试验。介绍了该桥模型试验的目的、模型设计原则、测试工况、加载方案以及应变和变形测点布置情况等,给出了几个主要荷载工况下模型试验的主要结果。同时利用ANSYS软件建立空间有限元模型,对其静力、动力性能进行了理论分析。试验数据与理论数据比较接近,证明该桥设计是合理、安全的。
Zhongshan special-shaped arch bridge is a multi-dimensional space system composed of two inclined steel arch ribs, a curved steel box girder with a bridge deck and a tilted boom, which belongs to a special space steel rib arch bridge and is subjected to complicated forces. To study its mechanical behavior, a scale model test was conducted. This paper introduces the purpose of the model test, the principle of the model design, the test condition, the loading scheme and the layout of the strain and deformation measuring points. The main results of the model tests are given under several main load conditions. At the same time, using ANSYS software to establish a spatial finite element model, the static and dynamic performance of a theoretical analysis. The experimental data is close to the theoretical data, which proves that the bridge design is reasonable and safe.