分离式双箱梁斜拉桥全桥气弹模型设计与风洞试验研究

Full Aeroelastic Model Design and Wind Tunnel Test of Long-Span Cable-Stayed Bridge with Separated Double-Box Girder

以主跨为220m的台湾某独塔斜拉桥为背景,对该分离式双箱梁异形桥塔斜拉桥全桥气动弹性模型设计、制作、模态调试及风洞试验进行详细论述。介绍了斜拉索、主梁、横梁及斜拉索吊臂、桥塔的设计和制作方法,根据模态测试结果可知,该桥全桥气弹模型设计和制作能很好地满足试验要求,可为同类型桥梁全桥气弹模型设计提供参考和借鉴。对该桥进行了均匀流场涡激共振、颤振及紊流场涡激共振、抖振风洞试验,结果表明该桥具有较好的抗风稳定性。

The design,fabrication,modal test and wind tunnel test for a single pylon cable-stayed bridge in Taiwan（ main span 220 m） were elaborated. The design and manufacture technique of structural components such as cable stays,girder,beam and cable-stayed rigid arms,pylons were expounded. The modal testing results showed that the design and manufacture of the bridge meet the test requirements well,and it could be adopted as a reference for model design of other similar bridges. Vortex-induced vibration（ VIV） and flutter in uniform field,VIV and buffeting vibration in turbulence field were studied by wind tunnel test. The results approached that the bridge has good aerodynamic stability.