铜瓦门大桥设计与稳定性研究

Study of design and stability of Tongwamen Bridge

铜瓦门大桥主桥是一座宽跨比 ( 1 / 2 3.8)较小的中承式钢管混凝土拱桥 ,采用平面桁架拱肋 ,其整体稳定性是设计考虑的关键问题之一 .采用 X型双拱肋和布置合理的横向联结系 ,使得该桥的稳定系数达到 5 .76～ 6 .2 1 ,满足了设计要求 .

Tongwamen Bridge is half-through concrete-filled steel tube arch bridge with ratio of width of deck and span being very small (1/23.8). So its overall stability is one of the critical problems in design. By adopting X-type arch ribs and rational sash braces, its buckling load level can come to 5.76-6.21.