摘要
研究输电塔在风雨荷载共同作用下的动力响应,提出了改进的雨荷载计算方法。针对雨滴在风作用下的受力情况,计算出雨滴作用到输电塔构件上的夹角,得出改进的雨压强计算公式和时程曲线,利用ANSYS软件将风雨荷载加载到有限元模型上进行动力响应分析,得出输电塔顶端的顺风向最大位移。研究表明,改进的雨荷载压强公式是简单可行的,输电塔顶端的顺风向最大位移的变化趋势显著。
In order to study the transmission tower dynamic response under the conjunct function of wind and rain loads, this thesis proposes a revised wind load calculation method based on previous rain load pressure formula. According to the raindrop force state under wind load, the angle relative to transmission tower structure was calculatai, and rain pressure formula with angle and previous rain pressure formula was revised, by using MATLAB program language getting wind and rain load travel-time curve, then making wind and rain load act on ANSYS element model to get the maximum displacement on the top of transmission tower. Using revised rain load pressure formula, the maximum horizontal displacement at the top of transmission tower increase from 0. 036 3 m to 0. 423 m correspondingly with the increase of rain strength under the effect of 6 wind velocity whose speed is 13 m/s. the result shows that the advised rain load pressure is feasible and simple and the variability trend of the maximum horizontal displacement at the top of transmission tower is obvious. It provides theory foundation for transmission tower design under the conjunct function wind and rain loads.
出处
《结构工程师》
北大核心
2012年第6期40-47,共8页
Structural Engineers
基金
国家自然科学基金资助项目(59978025)
关键词
输电塔
雨荷载压强公式
夹角
时程曲线
顺风向最大位移
transmission, rain load pressure formula, angle, travel-time curve, the maximum horizontal dis- placement
