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A Comparative Study of Wind Tunnel Tests and Design Codes in Evaluation of Along-Wind Effects on Towers

机译:风洞试验和设计代码在塔上沿风效应评价的比较研究

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This study aims to estimate the wind loads acting on a tower structure by comparing and reviewing design codes and the results of wind tunnel tests. To this end, the modal properties of the tower were identified through short-term on-site measurements of the Busan Tower in Korea. The wind load acting on the tower was calculated using four design codes: KBC2009 (Korea), ASCE7-10 (USA), EUROCODE (Europe), and AIJ2004 (Japan). Additionally, force measurement tests and aeroelastic model tests were conducted for comparison. The results obtained indicated that the design wind velocity of each design code differed slightly, reflecting the individual characteristics of each country. The base shear force, base moment, and maximum displacement obtained from each design code were similar to those obtained in the wind tunnel tests. The magnitudes of the base moments and maximum displacements calculated by each design code were in the order of KBC??AIJ?≈?EUROCODE??ASCE7. The overall results indicate that each design code reasonably estimates the wind forces and the responses of the tower and also has an appropriate safety margin. The scatter in the predicted wind loads occurs primarily from the variations in the design wind velocity in the respective design codes.
机译:本研究旨在通过比较和审查设计代码和风洞试验结果来估计作用在塔结构上的风力载荷。为此,通过韩国釜山塔的短期现场测量来确定塔的模态特性。使用四个设计代码计算在塔上的风重:KBC2009(韩国),ascy7-10(美国),欧洲码(欧洲)和aij2004(日本)。另外,进行了力测量试验和空气弹性模型试验进行比较。获得的结果表明,每个设计代码的设计风速略有不同,反映了每个国家的个体特征。从每个设计代码获得的基本剪切力,基板时刻和最大位移类似于在风隧道测试中获得的那些。每个设计代码计算的基极矩和最大位移的大小是kBc的顺序?&?aij?≈αeurocode?&?asce7。整体结果表明,每个设计代码合理地估计塔的风力和响应,也具有适当的安全保证金。预测的风力载荷中的散射主要来自各个设计代码中的设计风速的变化。

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