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以桃花峪黄河大桥为工程背景,开展自锚式钢箱梁悬索桥主缆锚固结构的缩尺模型试验研究,采用ABAQUS程序,建立了缩尺模型试验的精细有限元模型。试验研究表明:后锚板的荷载-应力曲线存在阶梯状分布特点,呈现沿后锚板、前锚板至顶板、纵隔板逐渐衰弱的规律,说明在缩尺模型试验中存在显著的圣维南现象。将有限元分析结果与试验结果对比分析,二者吻合良好,精细有限元模型能够较好地模拟缩尺模型试验。桃花峪黄河大桥主缆锚固结构设计合理,安全储备高。
Taking the Taohuayu Yellow River Bridge as the engineering background, a scale model test on the anchorage structure of the main cable of the self-anchored steel box girder suspension bridge was carried out. The ABAQUS program was used to establish the fine finite element model of the scale model test. The experimental results show that the load-stress curve of the rear anchor plate has the characteristic of stair-like distribution, which shows the law of gradual weakening along the rear anchor plate, the front anchor plate to the top plate and the longitudinal bulkhead, indicating that there is a significant Saint- phenomenon. The results of finite element analysis and experimental results are compared and analyzed. The two agree well with each other. The fine finite element model can simulate the scale model experiment well. The main cable anchorage structure of Taohuayu Yellow River Bridge is designed reasonably with high safety reserves.