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某跨江桥梁初设方案选为新月拱-悬臂梁组合体系桥梁方案,由于建设条件的限制,在保证结构外形变化较小的情况下,改为新月拱-连续梁组合体系桥梁方案。该文对新月拱-悬臂梁组合体系桥梁方案和新月拱-连续梁组合体系桥梁方案的受力性能进行比较分析,研究结果表明:在恒载、活载和收缩徐变荷载工况作用下,两种结构体系新月拱结构的轴力相差较小,在拱脚外弯矩有较大的差别,其余部位的弯矩相差较小。
Because of the limitation of the construction conditions, the project of a bridge across the river is selected as the bridge scheme of the new moon arch-cantilever combination system, and replaced with the bridge scheme of the new moon arch-continuous beam composite system under the condition that the structural shape change is small. This paper compares and analyzes the mechanical behaviors of the bridge scheme of the Crescent Arch-Cantilever Combo System and that of the Crescent Arch-Continuous Beam Combo System. The results show that under constant load, live load and shrinkage and creep load conditions , The axial force of the arch between the two structural systems is smaller, the bending moment outside the arch has a greater difference, and the bending moment of the other parts is smaller.