典型形体超高层建筑的风压风场与抗风优化研究  

Wind pressure and wind-resistant shape optimization of typical super high-rise buildings

作　　者：毛璐璐 韩兆龙[1,2] 周岱 包艳[1] 汪汛 李煜[1] 马晋[1] MAO Lulu;HAN Zhaolong;ZHOU Dai;BAO Yan;WANG Xun;LI Yu;MA Jin(School of Naval Architecture,Ocean and Civil Engineering,Shanghai Jiao Tong University,Shanghai 200240,China;State Key Laboratory of Ocean Engineering,Shanghai Jiao Tong University,Shanghai 200240,China;Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration,Shanghai 200240,China)

机构地区：[1]上海交通大学船舶海洋与建筑工程学院,上海200240 [2]上海交通大学海洋工程国家重点实验室,上海200240 [3]高新船舶与深海开发装备协同创新中心,上海200240

出　　处：《振动与冲击》2019年第18期215-222,共8页Journal of Vibration and Shock

基　　金：国家自然科学基金(11772193; 51679139;51490674);上海领军人才计划项目(20);上海市自然科学基金(18ZR1418000; 17ZR1415100);上海浦江人才计划(17PJ1404300);上海交通大学新引进人员科研启动基金(WF220401005);上海高校特聘教授(东方学者)岗位计划;上海市国际科技合作基金(18290710600)

摘　　要：现代建筑的结构高度日益增加,高层建筑截面形式更加多样。近年来,我国出现了许多新型截面形式的超高层建筑,其风荷载的控制是结构风工程领域的研究重点。针对类矩形截面和圆形截面的超高层建筑,基于计算流体动力学方法和ANSYS/FLUENT软件,数值模拟分析不同截面超高层建筑的表面风压分布规律,不同风向角下典型测点的平均风压系数,开展行人高度处风速的比较分析,研究超高层建筑抗风形体优化。结果表明:在超高层建筑转角处,因气流分离的不连续性而出现负风压最大值;风向角对切角矩形截面超高层建筑的风压分布影响显著,当截面切角正对来风方向时,其风压分布最不利;圆形截面超高层建筑负风压量值较小,且利于满足行人风安全性和风舒适性的要求,具有良好的抗风性能。The height of modern architectures is increasing and the cross-section shape of high-rise buildings is becoming more diverse.In recent years,high-rise buildings with unconventional configurations have been constructed in China,which brings new challenges to wind engineering.Aiming at super high-rise buildings with rectangular-category and circular sections,based on the computational fluid dynamics(CFD)method and the ANSYS/FLUENT software,the wind pressure distribution and wind pressure coefficient at typical points of the super high-rise buildings with different section shapes were numerically simulated in different incoming wind directions to study the wind-resistant shape optimization of the super high-rise buildings.The results show that the maximum negative peak pressure occurs at the corner of super high-rise buildings due to the discoutinuity of the airflow separation at the corner edge.The super high-rise buildings with lacking-angle rectangular section have the most unfavorable wind pressure distribution when the incoming wind direction is directly facing the lacking-angle corner.The super high-rise buildings with circular section bear lower negative pressure,which is advantageous to wind-resistance ability.

关 键 词：超高层建筑 计算流体动力学(CFD) 风压分布 平均风压系数 

分 类 号：TU312.1[建筑科学—结构工程]