ANALYTICAL AERODYNAMIC INVESTIGATION OF CABLE-STAYED HELGELAND BRIDGE
ANALYTICAL AERODYNAMIC INVESTIGATION OF CABLE-STAYED HELGELAND BRIDGE
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DOI：
10.1061/(asce)0733-9445(1992)118:1(147
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发表时间：
1992
期刊：
影响因子：
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通讯作者：
I. Kovács;H. Svensson;E. Jordet
中科院分区：
文献类型：
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作者：
I. Kovács;H. Svensson;E. Jordet
一座780米长、非常细长的斜拉桥是为极端风速和高湍流强度而设计的。通过对湍流风在空间和时间上的数学模拟，对其使用状态和极限状态进行了研究。根据静力截面模型试验结果，确定了桥面横截面的风荷载特性。对于极限状态，考虑了非线性理论、非线性应力应变关系和力相互作用的影响。对结果进行统计评价。与使用状态的线性插值法相比，通过直接计算极限状态实现了显著的节省。在大风的相干性质方面还需要进一步研究；现有文献目前对此似乎没有提供足够的文件。
A 780‐m long, very slender cable‐stayed highway bridge is designed for extreme wind speeds and high turbulence intensities. An investigation is made for the service state as well as the ultimate limit state through the mathematical modeling of turbulent wind in space and time. Wind‐force characteristics of the deck cross‐section are adopted from the results of static section model tests. For the ultimate limit state, effects of nonlinear theory, nonlinear stress‐strain relations, and force interactions are considered. The results are evaluated statistically. Significant savings are achieved by the direct calculation of the ultimate limit state as compared with the linear interpolation from the service state. Further research is required in the area of the coherence properties of strong winds; the existing literature appears to provide insufficient documentation for these at the present time.