土楼夯土墙的风驱雨撞击荷载影响分析  

Impact Load of Rain Induced Wind on Rammed Earth Wall of Earth Building

作　　者：张丽[1] 彭兴黔[1] 

机构地区：[1]华侨大学土木工程学院,福建厦门361021

出　　处：《华侨大学学报（自然科学版）》2012年第5期561-564,共4页Journal of Huaqiao University(Natural Science)

基　　金：国家自然科学基金资助项目(51178196);福建省科技计划重大项目(2011Y3005);福建科技计划重点项目(2010Y0037)

摘　　要：运用流体力学的相关知识,分析雨滴降落的运动方程,在考虑风速的基础上推算出风驱雨的雨滴撞击荷载,并分析各因素对撞击荷载的影响.研究结果表明:雨滴降落的竖直极限速度与雨滴的直径及牵引阻力系数有关,并随着雨滴直径的增大而增大;雨滴的水平极限速度等于风速.理论分析表明:雨滴的撞击荷载及其法向分荷载、切向分荷载均随着风速和雨滴直径的增大而增大.Using hydromechanics,considering the effect of wind speed,the equation of motion of raindrops was presented to calculate the impact load of rain induced wind,the influence of different factors on the impact load was analyzed.Research results show that the vertical limit speed of the raindrops is related to the diameter of the raindrops and drawing resistance coefficient,and the speed increases with the increase of the diameter of the raindrops;the horizontal speed limit of raindrops is equal to the wind speed.Through a series of theory analysis,it is concluded that raindrop impact load,its normal and tangential component loads increase with the increase of wind speed and the diameter of the raindrops.

关 键 词：夯土结构 阻力系数 雷诺数 雨量 降雨强度 

分 类 号：TU312.1[建筑科学—结构工程]