Comparative Study on Buffeting Performance of Sutong Bridge Based on Design and Measured Spectrum
Comparative Study on Buffeting Performance of Sutong Bridge Based on Design and Measured Spectrum
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DOI：
10.1061/(asce)be.1943-5592.0000394
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发表时间：
2013-07
影响因子：
3.6
通讯作者：
Hao Wang;R. Hu;Jing Xie;T. Tong;Ai-qun Li
中科院分区：
文献类型：
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作者：
Hao Wang;R. Hu;Jing Xie;T. Tong;Ai-qun Li
近年来结构健康监测技术的发展，使桥梁的抖振响应能够更真实地进行评估。本文对主跨1088 m的苏通斜拉桥的抖振响应进行了分析，采用设计阶段的风谱和长期SHM系统的试验结果，将实际抖振响应与设计预测进行了比较。根据监测系统现场记录的大风资料，导出了纵向和垂直脉动风分量的自谱。在时域内进行了含气动弹性效应的抖振分析。与实测谱得到的抖振响应相比，设计谱得到的梁在水平方向上的响应较大，其他方向上的响应较小，而塔的响应较大，相对保守。
The recent development in structural health monitoring (SHM) technology enables the buffeting responses of bridges to be evaluated in a more realistic manner. In this paper, the buffeting responses of the cable-stayed Sutong Bridge with a main span of 1,088 m is analyzed with the wind spectra used in the design phase and those obtained experimentally from a long-term SHM system to compare the actual buffeting response with design predictions. The autospectra of longitudinal and vertical fluctuating wind components are derived from the in situ strong wind data recorded by the monitoring system. The buffeting analysis is accomplished in the time domain with the aeroelastic effect included. Compared with the buffeting responses obtained from the measured spectrum, the girder responses from the design spectrum are larger in the horizontal direction and smaller in other directions, whereas the tower responses are larger and thus relatively conservative.