公铁两用非对称矮钢塔双层桁架梁斜拉桥抗风性能研究  

Study on Wind Resistance of Double-Layer Truss Beam Highway and Railway Cable-Stayed Bridge with Asymmetric Low Steel Tower

作　　者：姜贺 冯亚成[2] Jiang He;Feng Yacheng(Lunan High-Speed Railway Co.,Ltd.,Jinan 250014,China;China Railway First Survey and Design Institute Group Co.,Ltd.,Xi’an 710043,China)

机构地区：[1]鲁南高速铁路有限公司,济南250014 [2]中铁第一勘察设计院集团有限公司,西安710043

出　　处：《动力学与控制学报》2024年第11期82-90,共9页Journal of Dynamics and Control

基　　金：山东省交通运输厅科技计划项目(2022B91)。

摘　　要：为研究主跨(84+144+228+240+300+120+60)m的矮塔钢桁梁斜拉桥在设计风速下的抗风性能,选择风洞试验作为主要研究方法,通过节段模型试验和全桥气弹模型试验,对济阳黄河大桥成桥状态和典型施工状态的风荷载及风致响应进行测试,并与桥梁抗风规范进行对比.弹性悬挂节段模型测振风洞试验结果表明,该桥主梁的颤振性能和涡激共振性能均满足抗风安全要求;而全桥试验结论则发现,在0~110 m/s的风力区域内,未观测到主梁颤振和涡激振动现象,也未发现静力失稳情况,且主梁位移响应满足了安全要求和舒适性要求,大桥的抗风性能得到了进一步验证.钢桁架桥的抗风试验研究为设计提供了充分的检验依据,可以供类似的钢桁架工程参考.To investigate the wind resistance performance of the low-tower steel truss cable-stayed bridge with a main span of(84+144+228+240+300+120+60)m under the design wind speed,wind tunnel tests were selected as the primary research method.Segment model tests and full-bridge aeroelastic model tests were conducted to measure the wind loads and wind-induced responses of the Jiyang Yellow River Bridge in both the completed state and typical construction conditions,and the results were compared with bridge wind resistance codes.Elastic suspension segment model vibration wind tunnel test results revealed that the flutter and vortex-induced resonance performance of the main beam meets the wind resistance safety requirements.The full-bridge tests concluded that no flutter or vortex-induced vibration of the main beam was observed in the wind speed range of 0~110 m/s,nor were any static instability conditions detected.Moreover,the displacement response of the main beam satisfied both the safety and comfort requirements,thus further verifying the bridge’s wind resistance performance.The wind resistance experimental study of the steel truss bridge provides a substantial basis for design verification and can also serve as a reference for similar steel truss construction projects.

关 键 词：公铁两用桥 斜拉桥设计 风洞试验 抗风性能 风致振动 

分 类 号：O357[理学—流体力学]