调顺跨海特大桥约束体系研究与设计

Research and design of the constraint system of Tiao Shun cross-sea bridge

调顺跨海特大桥为跨径291 m的下承式钢箱提篮拱桥。针对该桥风荷载大、抗震设防水准高、桩基自由段长度较长等建设条件,结合下承式提篮拱桥的结构特点,确定了全桥静、动力性能最优目标。根据该目标,对桥梁纵向、横向约束体系进行理论计算及对比分析,最终确定该桥的约束体系,在此基础上提出各向约束装置的功能和特殊要求,并确定了技术参数。

TiaoShun cross - sea bridge is a steel box handle - basket through arch bridge which has 291 m span. Based on the construction characteristics of the bridge such as ： high wind load and seismic precautionary intensity,long length of free section in pile foundation, the optimal objective of dynamic and static behavior of the bridge was set combined with the structural characteristics of steel box handle - basket through arch bridge. According to the objective, the theoretical arithmetic and comparative analysis of vertical and horizontal restraint system of the bridge were carried out. In the end, the restraint system of the bridge was finalized, the function and special requirements of restraint system in all directions were put forward on this basis, and the technical parameters was confirmed.