欢迎您！东篱公司
退出
-
申报数据库
-
立项数据库
-
成果数据库
-
项目获奖数据库
中文摘要：
对风荷载作用下角钢格构塔各工况进行CFD模拟,研究挡风系数、风向角、长宽比及锥度等因素对阻力系数的影响,并与各国规范及试验进行对比。研究结果表明：风荷载0°风向阻力系数为挡风系数的2次多项式,其他风向角的阻力系数与0°风向的阻力系数的比值为风向角的2次多项式,最大值约为30°风向;各国规范的阻力系数及试验值相差较大,《建筑结构荷载规范》GB 50009的规定值处于最下限,日本规范的规定值处于最上限,最大相对误差为46.2%,按均匀风速修正后的CFD阻力系数与日本规范值很接近;当挡风系数较小时,遮挡效应影响较小,随着挡风系数的增大,遮挡效应的影响也增大;随着锥度的增大,阻力系数也增大,但是,一般塔的锥度都较小,其影响也比较小。
英文摘要：
In order to ascertain the influence of solidity,wind direction,the rate of length and width and taper,CFD simulations of angled lattice tower under wind load were carried out in different cases.Simulation results were compared with codes and tests.The results show that the expression of drag coefficients of 0° wind angle is a quadratic polynomial of solidities.The rate of drag coefficients of other wind direction and the one of 0° wind angle is a quadratic polynomial of wind angle.The maximum point is about 30°.There are significant differences between codes and tests.The drag coefficients in Chinese BG 50009 ＂Load Code for the Design of Building Structures＂ is the lowest limit,while the drag coefficients in Japanese ＂AIJ Recommendations for Loads on Buildings＂ is the highest limit,the maximum error between them is 46.2%.The modified CFD results according to uniform wind velocity are close to those in Japanese ＂AIJ Recommendations for Loads on Buildings＂.The shielding effect is relatively minor when solidities are small and the shielding effect increases with the increase of solidities.With the increase of taper,drag coefficients increase.For towers with tapers in common use,the influence is little.
同期刊论文项目
同项目期刊论文
Seismic Response of Power Transmission Tower-line System Subjected to Spatially Varying Ground Motio
Seismic Response Analysis of Transmission Tower-Line System on a Heterogeneous Site to Multi-Compone
An unnegligible problem in current calculation model for multi-support seismic analysis of structure
Study of dynamic impacts on transmission line systems due to conductor breakage using finite element
Wind-rain-induced vibration Response Test of High-voltage Transmission Tower and Method for Resistan
位置：