国内外输电塔风荷载技术标准比较分析

随着海外工程设计项目的日趋增多，设计人员了解、熟悉并掌握国内外规范间的异同显得尤为重要。将我国输电线路规范与美国ASCE规范、日本JEC标准、欧盟EN规范、国际标准IEC规范进行对比，重点分析了风压高度变化系数、风荷载体型系数、风荷载调整系数(风振系数)等相关参数的计算取值。对比分析结果表明，国内外规范在基本风速、风压高度变化系数、风荷载体型系数、风荷载调整系数(风振系数)、角度风荷载计算方法等方面存在差异。分析结果可供输电工程设计技术人员提供参考。

Comparative Analysis of Wind Load Technical Standard on Power Transmission Tower Between China and Foreign Countries

With the increase of overseas design project, it is necessary for designers to comprehend and master the similarities and differences between domestic and foreign standards. The transmission line standard in China is compared with ASCE standard in U.S., JEC standard in Japan, EN standard in EU, and international standard IEC, the calculated values of relative parameters including height variation coefficient of wind pressure, shape coefficient of wind load, adjustment coefficient of wind load (wind vibration coefficient), et al are emphatically analyzed. The results show that domestic and foreign standards are different in some calculation methods, such as basic wind speed, height variation coefficient of wind pressure, shape coefficient of wind load, adjustment coefficient of wind load (wind vibration coefficient), and yawed wind load, which can provide references for the designers in power transmission projects.