两种角部形式并列双方柱风荷载数值模拟  

NUMERICAL SIMULATION OF WIND LOAD ON TWO SIDE-OF-SIDE CYLINDERS WITH TWO CORNER FORMS

作　　者：张特 范佳红 袁中亚 苏政忠 贾美微 于淼 ZHANG Te;FAN Jiahong;YUAN Zhongya;SU Zhengzhong;JIA Meiwei;YU Miao(School of Civil Engineering,Heilongjiang University,Harbin 150086,China)

机构地区：[1]黑龙江大学建筑工程学院,哈尔滨150086

出　　处：《低温建筑技术》2023年第8期10-13,共4页Low Temperature Architecture Technology

基　　金：国家自然基金面上项目“建筑屋面雪的热力学过程及风吹雪过程的耦合作用研究”(52078380)。

摘　　要：为探究角部处理措施对于并列建筑的气动干扰效应影响,以凹角和圆角两种角部处理(角部变化率10%)并列双方柱为研究目标,在B(两方柱中心距)/L(方柱边长)=1.2的间距比工况下进行大涡模拟。对比两组并列双方柱的平均风压系数、流场机理、升力系数与阻力系数时程。结果表明两种角部处理的并列双方柱均在间距比为1.2时出现偏流现象;凹角方柱对气流前缘分离有增强效果,结构升力系数与阻力系数极值均大于圆角方柱;圆角方柱周围旋涡发展更完全,气动力系数受偏流旋涡影响波动更大。This paper studies the influence of corner treatment measures on aerodynamic interference effect of parallel buildings.Aiming at the concave corner and round corner treatment with 10% the change rate of corner,large eddy simulation(LES) is carried out under the condition that the spacing ratio was B/L=1.2,where B is the distance between the center of two square columns and L is the side length of square column.Mean wind pressure coefficient,flow field mechanism,lift coefficient,and drag coefficient time history of two groups of side-by-side square cylinders are compared.The results show that the biased flow appears when the spacing ratio of two side-by-side cylinders with two corner treatments is 1.2;the concave corner treatment can enhance the separation of airflow leading edge.The extreme values of lift coefficient and drag coefficient of the structure are greater than those of the rounding square cylinder;the vortex around the rounding square cylinder is more complete,and the aerodynamic coefficient fluctuates more greatly under the influence of deflection vortex.

关 键 词：并列双方柱 偏向流 角部处理 气动干扰 

分 类 号：TU312[建筑科学—结构工程]