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推荐了2种使用钢管主梁及正交异性钢板桥面的新型斜拉桥:具有双面索的双钢管主梁桥和具有单面索的三钢管主梁桥。采用新桥式设计了主跨500 m的斜拉桥,并通过静力分析验证了其可行性。通过风洞试验了解桥梁的空气动力特性,对于双钢管主梁桥模型,在风速超过75 m/s(攻角α=0°、+3°)时发生扭转颤振;对于三钢管主梁桥模型,在风速超过115 m/s时发生扭转颤振,显示出超强的空气动力稳定性。通过计算机渲染和木模型研究了该桥型的美学,结果显示,此新型斜拉桥不仅结构比例合适,而且很有吸引力、与周围环境协调。
Two new type of cable-stayed bridges using steel tube girder and orthotropic steel deck are recommended: double-steel girder bridge with double-sided cable and triple-steel girder bridge with single-sided cable. A 500 m cable-stayed bridge with a main span of 500 m was designed using a new bridge, and its feasibility was verified by static analysis. Through the wind tunnel test, the aerodynamic characteristics of the bridge are studied. For the dual-steel tube-girder bridge model, torsional flutter occurs when the wind speed exceeds 75 m / s (angle of attack α = 0 °, + 3 °) Model, torsional flutter occurs at wind speeds in excess of 115 m / s, demonstrating superior aerodynamic stability. The aesthetics of the bridge was studied by computer rendering and wood model. The results show that the new cable-stayed bridge not only has a reasonable proportion of structure, but also is very attractive and harmonious with the surrounding environment.