风冰荷载作用下输电塔-线体系参数敏感性分析  

Sensitivity analysis of transmission tower-line system parameters under wind and ice loads

作　　者：张亮 牛凯 罗贤超 张思遥 裴浩威 唐亚可 田利[2] ZHANG Liang;NIU Kai;LUO Xianchao;ZHANG Siyao;PEI Haowei;TANG Yake;TIAN Li(Economic Research Institute,State Grid Henan Electric Power Company,Zhengzhou 450007,Henan,China;School of Civil Engineering,Shandong University,Jinan 250061,Shandong,China)

机构地区：[1]国网河南省电力公司经济技术研究院,河南郑州450007 [2]山东大学土建与水利学院,山东济南250061

出　　处：《山东大学学报（工学版）》2024年第3期132-140,共9页Journal of Shandong University（Engineering Science）

基　　金：国家电网公司总部科技项目(5200-202224095A-1-1-ZN)。

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°。Based on the phenomenological hysteresis model for angular steel members,a study on wind-induced collapse damage of ice-covered transmission tower-line system was carried out,and sensitivity analysis was carried out considering the uncertainty of structural parameters.A joint probability distribution model of wind speed and ice thickness was developed,and the combination of hazard effects and combination coefficients were calculated considering different recurrence periods.The results showed that the annual extreme wind speed and the annual maximum ice thickness during the ice-covered period were consistent with the generalised extreme value(GEV)distribution for wind speeds in the range of 5-10 m/s and ice thicknesses in the range of 10-20 mm.Under the combined influence of wind and ice loads,the damage of the transmission tower-line system was concentrated at the tower legs,and the failure of the main material was the main reason for the collapse of the structure.In the sensitivity analysis,the yield strength and modulus of elasticity of the ice-covered transmission tower-line system had the greatest influence on the critical collapse wind speed of the structure,and the sensitivity level was greater at 0°and 30°wind attack angles than the sensitivity level at 45°and 90°.

关 键 词：输电塔-线体系 风冰荷载 现象学滞回模型 倒塌破坏 敏感性分析 

分 类 号：TM752[电气工程—电力系统及自动化]