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介绍主跨55m钢箱-混凝土组合连续梁桥设计过程中为提高混凝土桥面板抗裂性能和改善结构负弯矩区受力性能所采取的一系列措施,并对其效果进行了计算分析,同时,对体外预应力钢束及压型钢板在组合梁中的应用进行了介绍。研究结果表明,所采取的措施有针对地改善了结构受力性能且效果显著,为今后组合梁的优化设计提供了有益的参考。
A series of measures taken to improve the crack resistance of concrete deck slabs and to improve the mechanical properties of the negative moment region of the structure during the design of the main span 55m steel box-concrete composite continuous girder bridge are introduced and their effects are calculated and analyzed. Meanwhile, , The application of externally prestressed steel beam and profiled steel plate in composite beams is introduced. The results show that the measures taken to improve the performance of the structure with a significant effect and significant for the future optimal design of composite beams provide a useful reference.