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对连续梁拱组合体系桥梁在施工过程中的受力性能进行了实桥测试和有限元模拟分析。结果显示,结构系梁、拱肋及横梁等构件在桥梁施工过程中均处于受压状态,最大压应力为13.7MPa,出现在第4次吊杆张拉完成后中拱拱肋1/4截面下缘,拱脚位置压应力水平不高;采用分阶段多次张拉,可以有效的调整该种组合体系桥梁的吊杆张拉力;有限元计算结果与实测结果吻合良好。
The actual bridge test and finite element simulation analysis of the mechanical behavior of the bridge during the construction of the continuous beam and arch composite system are carried out. The results show that the structural beams, arch ribs and beams and other components in the process of bridge construction are in compression, the maximum compressive stress of 13.7MPa, appeared in the fourth boom after the completion of tension arch rib 1/4 section The stress of the lower edge and the arch foot is not high. The tension of the boom of the bridge with this kind of composite system is adjusted effectively by the multi-stage tensioning. The calculated results are in good agreement with the measured results.