中文摘要：

稳定问题是输电铁塔中一个极其重要的问题,以输电铁塔轴心受压构件的稳定系数为研究对象,对美国铁塔设计导则ASCE10-97、英国铁塔设计规范BS 8100-3及欧洲45 kV以上架空输电线路设计规范EN 50431-1中关于轴心受压构件的稳定系数规定进行了介绍,并与中国架空输电线路杆塔结构设计技术规定的稳定系数DL/T 5154进行对比分析.结果表明：ASCE10-97关于轴心受压构件稳定系数没有考虑截面分类的影响,而DL/T 5154、BS 8100-3、EN 50431-1考虑了截面分类对稳定系数曲线的影响;对于输电铁塔热轧角钢主材的稳定系数,ASCE10-97的大于DL/T5154、BS 8100-3及EN 50431-1的稳定系数,与DL/T5154的相当;对于冷弯钢管主材的稳定系数,ASCE10-97大于DL/T 5154,BS 8100-34和DL/T 515相当,EN 50431-1最低.

英文摘要：

Stability is a very important problem in transmission towers.Taking the stability factor of axial compressive members in transmission towers as the research object,this paper presents stability factors of axial compressive members specified in American tower design guidelines （ASCE 10-97）,the British tower design specification （BS 8100-3） and European overhead transmission line of over 45 kV design specification （EN50431-1）,and make a comparison with technical regulation of design for tower and pole structures of overhead transmission line （DL/T 5154-2002）.The results show that stability factors of axial compressive members do not consider the influence of section classification in ASCE10-97,while DL/T 5154-2002,BS 8100-3 and EN 50431-1 considers the influence of section classification on stability factor curves; for the stability factor of hot-rolled angle steel members in transmission towers,ASCE10-97 is greater than DL/T 5154,while BS 8100-3 and EN 50431-1 almost equals to DL/T 5154-2002; for stability factor of cold-formed steel tube members,ASCE10-97 is greater than DL/T 5154-2002,BS 8100-3 almost equals to DL/T 5154-2002,and EN 50431-1 is the lowest.