特高压单柱拉线塔风振系数研究

发布时间：2018-01-10 02:02

本文关键词：特高压单柱拉线塔风振系数研究　出处：《建筑结构》2016年S2期 　论文类型：期刊论文

【摘要】：具有高柔性的特高压单柱拉线塔对风荷载十分敏感,风振系数的确定是其设计和应用的基础。建立了特高压单柱拉线塔塔线体系的有限元模型,阐述了基于振型叠加法的风振系数计算方法,考虑结构的前两阶振型的影响,基于时程分析的数据计算了单柱拉线塔的风振系数。结果表明:主柱上存在横隔材的位置风振系数会发生突变;时程分析得到的加权风振系数与按照荷载规范计算得到的加权风振系数较为接近;等效静力风荷载作用下,迎风侧主材轴力与风振响应的最大值较为接近,且大于平均风下主材的轴力。
[Abstract]:With the UHV high flexible single mast guyed tower is very sensitive to wind load, determine the wind vibration coefficient is the foundation for the design and application of the established finite element UHV single column cable Tata line system model, expounds the calculation method of wind vibration coefficient based on the modal superposition method, considering the influence of the first two vibration type structure, based on the time history analysis of the data of the wind vibration coefficient of single column guyed tower. The results show that the main column exists on the position of the wind vibration coefficient of diaphragm material will mutate; time history analysis of wind vibration coefficient weighted get closer to the weighted wind vibration coefficient calculated according to load code; equivalent static wind loads, the windward side principal axial force and the wind-induced response of the maximum value is close to that of axial force and greater than the average wind material.

【作者单位】：华北电力大学机械工程系;
【分类号】：TU312.1
【正文快照】： 0引言风是空气相对于地球表面的运动,风速时程由平均风和脉动风两部分组成,相应地,结构上的风荷载也可分为两种成分:平均风荷载和脉动风荷载。因此,风对结构的作用也有静力的平均风作用和动力的脉动风作用。平均风作用使结构产生一定的侧移,而脉动风作用使结构在该侧移附近左

【相似文献】