窄幅钢桁梁悬索桥抗风稳定性能研究

Wind-resistance stability of a narrow steel truss girder suspension bridge

采用风洞试验与数值计算方法,研究了新疆赛吾迭格尔大桥施工状态与成桥状态的抗风稳定性。试验与计算结果均表明:新疆赛吾迭格尔大桥的静、动力抗风稳定性均不满足要求,需采取抗风措施来改善该桥的抗风性能。结合该桥的桥型特点及地理位置选用架设抗风缆系统、采用一联中央扣、降低主缆高度、改善桥面结构等几种抗风措施来提高桥梁的抗风性能。经风洞试验与计算分析,该桥的抗风性能有了很大的改善。研究结果为以后此类桥梁的设计及施工提供借鉴。

The wind-resistant behavior of a suspension bridge ' Xinjiang Siudirgol Bridge ' in both construction and completion stages was studied by using wind tunnel test and numerical calculation methods.It was shown that its static and dynamic wind-resistant behaviors do not satisfy requirements;wind-resistant measures must be taken to improve its wind-resistant behavior.In order to improve its wind-resistant behavior,considering the shape feature of Siudirgol Bridge and its geographical location,wind-resistant cables and single central buckles were installed,the height of the main cable was decreased,the bridge deck structure was improved,etc.The wind tunnel test and numerical calculation results indicated that its wind-resistant behavior is improved greatly.The research results could provide a guidance for design and construction of similar bridges.