• ISSN 0258-2724
  • CN 51-1277/U
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Volume 30 Issue 2
Apr.  2017
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Journal of Southwest Jiaotong University  > 2017  >  30(2): 254-263.
ZHU Bing, WANG Xuewei. Experimental Study on PBL Shear Connectors of Steel-Concrete Composite Bridge Considering Transverse Prestressing[J]. Journal of Southwest Jiaotong University, 2016, 29(4): 621-631. doi: 10.3969/j.issn.0258-2724.2016.04.004
Citation: LI Zhengliang, LIU Xinpeng, YAN Zhitao, XIAO Zhengzhi. Analysis of Wind Characteristics on Double-Mast Cross-Rope Suspension Tower Influenced by Shielding Effect[J]. Journal of Southwest Jiaotong University, 2017, 30(2): 254-263. doi: 10.3969/j.issn.0258-2724.2017.02.007
shu

Analysis of Wind Characteristics on Double-Mast Cross-Rope Suspension Tower Influenced by Shielding Effect

doi: 10.3969/j.issn.0258-2724.2017.02.007
  • Received Date: 19 Jun 2015
  • Publish Date: 25 Apr 2017
    Abstract
  • To investigate the wind load distribution of cross-rope suspension tower with occlusion, and provide theoretical basis for wind resistant design, a single-mast and double-mast systems were tested by high-frequency force balance in wind tunnel in type-B landform turbulent flow and uniform flow fields. The influence of shielding effect on the power spectral density (PSD) of the base moment and the mean wind force coefficients was investigated, and the PSD parameters were fitted. The results show that, for the single-mast, the power spectra peaks of base moment across wind locate at wind angles of 15, 30 and 45 in turbulent flow field. The change law of the PSD of base moment across wind is similar to that along wind direction. For the double-mast system, the power spectra peaks of base moment across wind is 10 times the value along wind direction. Based on the basic form of fluctuating wind speed spectrum, the dynamic wind load model including along-wind, across-wind loads and torsion moment under different wind directions was established for single mast and double mast. The wind coefficient change significantly with the occlusion distance of 10D-20D (where D is the width of the cross section of tower) in the uniform flow field, and the occlusion effect is the most significant.

     

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