摘要
近年来我国沿海地区频繁发生台风等自然灾害,造成输电线路不同程度的受损。因此,研究输电塔原位加固方法,提高在役输电塔抗风承载能力,具有十分重要的研究意义和价值。对于输电塔薄弱杆件为斜材的情况,提出了采用T形组合角钢的加固方法,分别设计了构件试验与塔段试验进行验证。结果表明:采用该种方法可以有效提高输电塔刚度与承载能力,构件承载能力提高97. 06%,塔段抗侧向位移刚度提高24. 7%,塔段承载能力提高88. 7%,塔段的破坏方式发生变化,薄弱部位发生转移。
In recent years,natural disasters such as typhoons have frequently occurred in coastal areas of China,causing damage to transmission lines in varying degrees. Hence,the research on on-site reinforcement methods of transmission towers and improving the wind resistance capability of towers are increasingly meaningful and valuable.In the case that the vulnerable members are diagonal members,a reinforcement methodology was adopted by using Tshaped combined angles,the experiments were conducted on angle members and tower substructure. The results verified the efficiency of the methodology that the bearing capacity of angle member increased by 97. 06%,stiffness of substructure increased by 24. 7% and the bearing capacity of tower substructure increased by 88. 7%. The failure mode of the tower substructure was changed due to the change of weak parts.
引文
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