冷弯薄壁型钢蒙古包风雪作用下仿真研究  

Stimulation Study on the Cold-Formed Thin-Wall Steel Mongolian Yurt Under Wind and Snow Loads

作　　者：陈明 王一凡 CHEN Ming;WANG Yi-fan(College of Civil Engineering,Inner Mongolia University of Science and Technology,Baotou Inner Mongolia 014010,China)

机构地区：[1]内蒙古科技大学土木工程学院,内蒙古包头014010

出　　处：《计算机仿真》2021年第1期181-186,共6页Computer Simulation

基　　金：国家自然科学基金项目:草原地区装配式双肢冷弯薄壁型钢房屋受力性能研究(51768055)。

摘　　要：冷弯薄壁型钢蒙古包是一种新型房屋结构,结构质量轻、柔性大的特点决定了其控制荷载为风荷载与积雪荷载。通过计算流体动力学(CFD)方法,将蒙古包的风荷载体型系数与现行规范进行对比。模拟得到屋面的风荷载分布与不均匀雪荷载分布,定义2种风向角,将风荷载与风雪荷载分别作用于冷弯薄壁型钢蒙古包刚架,分析不均匀雪荷载与不同风向角对刚架的影响。研究表明,蒙古包由于其形状的特殊性使得风荷载体型系数出现变号情况;不均匀雪荷载分布使蒙古包在风场中的稳定性降低;30°风向角,即没有主平面刚架下的风向角为不利风向角,蒙古包刚架将在该风向角下,风雪荷载共同作用时率先发生失稳。The cold-formed thin-wall steel Mongolian yurt is a new type of building structure,the traits of this structure are the light weight and high flexibility which determined that the control load is wind and snow load.The wind load shape factor of Mongolian yurt obtained by computational fluid dynamics(CFD)was compared with that in the current specification.Wind load distribution and non-uniform snow distribution on the roof were simulated,two wind directions were defined,wind load and snow load were exerted on the rigid frame and its dynamic instability was studied with the Budiansky-Roth criterion.The results show that it comes out the sign-changing of the wind load shape factor based on the special shape of the Mongolian yurt,the non-uniform snow distribution decreases the dynamic stability of the Mongolian yurt simultaneously under wind actions,wind direction angle of 30,which wind direction angle without main plane rigid frame is adverse wind direction,and the Mongolian yurt rigid frame may loses its stability under this wind direction angle with wind and snow loads.

关 键 词：冷弯薄壁型钢蒙古包 风雪荷载 计算流体动力学 风荷载体型系数 刚架稳定 

分 类 号：TU391[建筑科学—结构工程]