摘要
大跨越输电塔多为钢构件构成的空间桁架体系,这类体系的高柔特性使其在风荷载作用下的结构动力响应十分强烈。选用体积小、质量轻的橡胶铅芯阻尼器(LRD)控制结构风振可以取得较好的效果。通过三维有限元仿真和风速场的数值模拟,采用响应面法对橡胶铅芯阻尼器控制下的大跨越输电塔的可靠度进行研究,证明由橡胶铅芯阻尼器控制后,塔线体系中塔杆的可靠指标由1.97提高到2.665,提高了35.3%。
Large span transmission towers normally are space truss systems made of steel members. This highly flexible system causes strong structural dynamic responses under wind loads. Small and light lead-core rubber damper （LRD） can effectively control structural aeolian vibration. Through 3D finite element simulation and numeric wind speed field simulation, reliability of large span tower controlled by LRD is studied using response surface method. Results show that when the tower-conductor system is controlled by LRD, tower reliability index increases from 1.97 to 2.665, representing a 35.3% improvement.
出处
《电力建设》
2008年第11期19-23,共5页
Electric Power Construction
基金
国家电网公司科技项目(SGKJ[2007]413)
关键词
大跨越输电塔
橡胶铅芯阻尼器
可靠度分析
large span transmission tower
lead-core rubber damper
reliability analysis
