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考虑风偏角影响的大跨径拱桥横向风荷载试验

, PP. 38-43

Keywords: 桥梁工程,大跨径拱桥,斜风,风荷载,风洞试验,横风效应

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Abstract:

依据某大跨径拱桥全桥气弹模型风洞试验,研究了不同风偏角下结构的横向风荷载响应。试验对模型的动力特性和静力刚度进行了测定,并采用紊流场模拟桥址处的风环境,进行了0°~90°风偏角下不同风速的试验。试验验证了该拱桥的气动安全性。数据分析结果表明当风向为正横桥向时,桥梁结构的风作用处于最不利状态,结构关键位置随风偏角的增大而增大;斜风向下桥梁实际风荷载效应比采用三角函数分解方法叠加得到结构风荷载效应更为不利。

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