CAJ | 학술논문

输电塔结构长期受到风、雨等环境荷载作用，常常发生高周疲劳破坏甚至倒塌，但到目前为止该方面的研究还很缺乏。本文以一500kV酒杯型输电塔结构为工程对象，模拟了风荷载时程；通过计算得出结构的危险杆件，利用雨流法统计出应力时程；并基于损伤容限理论和断裂力学理论，计算了输电塔的疲劳寿命。结果表明，结构构件的疲劳破坏对于输电塔整体寿命有重要影响，需要有针对性的防范与加固。
수전탑결구장기수도풍、우등배경하재작용，상상발생고주피로파배심지도탑，단도목전위지해방면적연구환흔결핍。본문이일500kV주배형수전탑결구위공정대상，모의료풍하재시정；통과계산득출결구적위험간건，이용우류법통계출응력시정；병기우손상용한이론화단렬역학이론，계산료수전탑적피로수명。결과표명，결구구건적피로파배대우수전탑정체수명유중요영향，수요유침대성적방범여가고。
Transmission towers are always exposed to environment loads such as wind and rain which leads to high cycle fatigue failure. So far , little research has been done in this field. This paper takes a 500KV transmission tower for example , simulating time-histories of wind load , locating the dangerous bar and compute fatigue life of transmission tower based on fracture mechanics and damage tolerance theory. The result shows that fatigue failure of structural element have significant effect on lifespan of the whole tower. So certain measure to protect and reinforce the tower is necessary.