Rankine涡平移模型下低层房屋龙卷风荷载的分析

Analysis of tornado forces on low-rise buildings according to the model of transmitting Rankine vortex

应用Rank ine涡运动理论,结合我国的龙卷风灾,探讨气流速度和压力沿平面的分布规律,分析建筑风荷载,表明了龙卷风各水平面左侧旋涡压强沿径向按递减,递增、递减变化,对建筑物风压力、风吸力、扭转的实用计算进行了探讨,可供建筑结构抗风设计参考。

Based on the theories of moving Rankine vortex and associated with the tornado disasters in our country, this paper explores the distribution-law of the current of air speed and pressure of tornado in space to ansysis wind loads on buildings, the related mathematical model is established, the variation laws according to decreases progressively, increases progressively, decreases progressively of radial pressure in the left of the swirling airflow is found with the tornado advanceing,the practicality numerical method of pressure ,wind suction and torque on the buildings is discussed and the results in this paper can to be the reference of the codification of design wind loads and construction of buildings against tornado forces.