桥梁结构监测技术在输电杆塔结构风致响应监测中的应用
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摘要
沿海台风多发区域的输电线路杆塔结构抗风减灾研究具有重要意义。为获得沿海台风作用下输电线路的杆塔动力响应的实测值,文章提出将桥梁结构监测技术应用于输电杆塔结构风致响应监测中,在台风风力较强区域的杆塔上布设风力、风速及杆塔动力响应监测系统,并建立杆塔线结构体系的有限元模型,分析动力特性及模拟风力输入状态下的杆塔各部位的振动加速度、振动位移以及内力的时程曲线,得出杆塔在矢量风荷载作用下的动力响应变化规律,为杆塔结构抗风减灾研究提供基础数据。
The study on the wind resistance and disaster reduction of transmission line tower structure in the coastal typhoon-prone area has important significance.In order to obtain the measured value of dynamic response of transmission line tower under the action of coastal typhoon,in this article it was proposed to apply the bridge structure monitoring technology to the wind-induced response monitoring of transmission tower structure,to arrange the wind force,wind speed and tower dynamic response monitoring system in the towers with strong typhoon wind,then it established the finite element model of tower line structural system,analyzed the dynamic characteristics as well as the time-course curves of vibration acceleration,vibration displacement and internal force of various tower parts under simulated wind input,and obtained the dynamic response variation rules of the tower under the action of vector wind load,thereby providing the basic data for the wind resistance and disaster reduction research of tower structure.
The study on the wind resistance and disaster reduction of transmission line tower structure in the coastal typhoon-prone area has important significance.In order to obtain the measured value of dynamic response of transmission line tower under the action of coastal typhoon,in this article it was proposed to apply the bridge structure monitoring technology to the wind-induced response monitoring of transmission tower structure,to arrange the wind force,wind speed and tower dynamic response monitoring system in the towers with strong typhoon wind,then it established the finite element model of tower line structural system,analyzed the dynamic characteristics as well as the time-course curves of vibration acceleration,vibration displacement and internal force of various tower parts under simulated wind input,and obtained the dynamic response variation rules of the tower under the action of vector wind load,thereby providing the basic data for the wind resistance and disaster reduction research of tower structure.
引文
[1]谢强,张勇,李杰.华东500kV任上5237线跑线风致倒塔事故的调查分析[J].电网技术,2006,30(10):59-63.
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[3]白海峰,李宏男.大跨越输电塔线体系随机脉动风场模拟研究[J].工程力学,2007,24(7):146-156.
[4]张琳琳,谢强,李杰.输电塔线路多塔藕联体系的风致动力响应分析[J].防灾减灾工程学报,2006,26(3):261-266.
[5]杨趣贤,许梦杰,顾桂定.高压输电线路导线及铁塔的风振分析[J].电力技术,1985(6):47-51.
[2]肖飞.台风威马逊对广西沿海地区输电线路影响分析[J].红水河,2015,34(2):79-81.
[3]白海峰,李宏男.大跨越输电塔线体系随机脉动风场模拟研究[J].工程力学,2007,24(7):146-156.
[4]张琳琳,谢强,李杰.输电塔线路多塔藕联体系的风致动力响应分析[J].防灾减灾工程学报,2006,26(3):261-266.
[5]杨趣贤,许梦杰,顾桂定.高压输电线路导线及铁塔的风振分析[J].电力技术,1985(6):47-51.