基于杆件阻力系数的输电铁塔风荷载计算方法研究

杨风利; 邵帅

doi:10.13204/j.gyjzG21081101

基于杆件阻力系数的输电铁塔风荷载计算方法研究

doi: 10.13204/j.gyjzG21081101

杨风利,
邵帅

中国电力科学研究院有限公司, 北京 100055

基金项目:

国家电网有限公司科技项目(5200-202126073A-0-0-00)。

详细信息

作者简介:
杨风利,男,1980年出生,博士,教授级高级工程师。电子信箱:yangfl1@pri.sgce.com.cn

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出版历程
- 收稿日期: 2021-08-11
- 网络出版日期: 2022-12-01

Calculation Method of Wind Loads Acting on Transmission Towers Based on Drag Coefficients of Single Members

China Electric Power Research Institute, Beijing 100055, China

摘要

摘要: 考虑输电铁塔杆件铅垂面倾角影响,改进了基于单根杆件阻力系数精细化计算输电铁塔迎风面和节段风荷载的JEC杆件总计法及分析流程,采用杆件总计法计算了常用挡风系数输电铁塔迎风面和节段风荷载阻力系数,探讨了主材长细比修正对输电铁塔阻力系数的影响规律,将杆件总计法阻力系数计算值与现行规范整体法计算值进行了对比分析。结果表明:中国规范整体法计算的塔身节段阻力系数小于杆件总计法,英国BS规范和日本JEC规范的整体法计算值与杆件总计法较为接近,不同挡风系数的塔身节段阻力系数相差在10%以内;迎风面和塔身节段阻力系数计算值与风洞试验值分别相差5.7%和7.5%,说明杆件总计法对输电铁塔迎风面和节段整体风荷载计算具有较好的适用性。
- 杆件 /
- 阻力系数 /
- 输电铁塔 /
- 长细比 /
- 总计法
Abstract: By considering the included angle between the front face of tower segments and the vertical plane, a refined JEC calculation method of wind loads acting on the frontal face and the segment of transmission towers based on the drag coefficients of single member was proposed, which was also called member assembly method. Drag coefficients of the frontal faces and segments of transmission towers with most commonly used solidarity ratios by member assembly method were calculated. Effects of the modification of main member slenderness ratio on drag coefficients were discussed. Drag coefficients calculated by the member assembly method were compared with those values regulated by total calculation method in applicable standards. The drag coefficients of tower segments calculated by the total calculation method in Chinese standard were lower than the member assembly method. Drag coefficients of tower segments calculated by the total calculation method in BS and JEC standards were close to the values calculated by the member assembly method. The relative variations of drag coefficients for tower segments with different solidarity ratios were lower than 10%. Drag coefficients by wind tunnel tests and the member assembly method for frontal faces and segments of typical transmission towers were compared. The relative variations were 5.7% and 7.5%, respectively. Property of the calculation method of wind loads acting on transmission towers based on single member drag coefficients was verified.
- member /
- drag coefficient /
- transmission tower /
- slenderness ratio /
- assembly method

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参考文献(15)

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