山东大学学报 (工学版) ›› 2024, Vol. 54 ›› Issue (3): 132-140.doi: 10.6040/j.issn.1672-3961.0.2023.058
• 电气工程 • 上一篇
张亮1,牛凯1,罗贤超2,张思遥2,裴浩威1,唐亚可1,田利2*
ZHANG Liang1, NIU Kai1, LUO Xianchao2, ZHANG Siyao2, PEI Haowei1, TANG Yake1, TIAN Li2*
摘要： 建立风速与覆冰厚度的联合概率分布模型,计算考虑不同重现期的灾害作用组合值和组合系数。基于角钢构件现象学滞回模型,开展覆冰输电塔-线体系的风致倒塌破坏研究,并考虑结构参数不确定性开展敏感性分析。结果表明,风速范围在5~10 m/s、覆冰厚度在10~20 mm时,覆冰期年极值风速和年最大覆冰厚度均符合广义极值分布(generalized extreme value, GEV)。在风、冰荷载的共同影响下,输电塔-线体系的杆件破坏集中在塔腿处,主材失效是结构倒塌的主要原因,且覆冰输电塔-线体系在敏感性分析中的屈服强度和弹性模量对结构临界倒塌风速影响最大,风攻角0°和30°的敏感性程度要大于45°和90°。
中图分类号:
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