多幕墙开洞对大跨屋盖结构风致内压的影响*
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（1 湖南大学土木工程学院，长沙 410082； 2 香港城市大学建筑学及土木工程学系，香港 999077）
［摘要］采用刚性模型风洞试验研究多幕墙开洞时的内部风效应。设计制作了具有不同体积、不同开洞孔状态的大跨房屋模型来进行多参数对比风洞试验。研究了开洞结构风致内压的空间分布特性，风致平均内压及脉动内压系数随风向角、开洞位置、开洞数量及矢跨比的变化规律，并进一步探讨了风致内压随风向变化的三维功率谱密度函数在不同状态下的特征。研究结果对多幕墙开洞(孔)的屋盖结构的抗风设计具有重要的参考价值。［关键词］大跨屋盖; 多幕墙开洞; 风致内压; 功率谱中图分类号：TU312+.1 文献标识码：A 文章编号：1002-848X(2015)13-0086-08
Influence on windinduced internal pressure of large-span roof with multiple openings in curtain wallsZhao Xiaohong1, Li Qiusheng1,2，Chen Fubin1(1 College of Civil Engineering, Hunan University, Changsha 410082, China; 2 Department of Architecture and Civil Engineering，City University of Hong Kong, Hongkong 999077, China )Abstract: Wind tunnel tests of rigid models were carried out to investigate the internal wind effect for structures with multiple openings in curtain walls. A series of large-span building models with various internal volumes and opening conditions were designed to conduct multi-parameter comparison wind tunnel tests. The space distribution characteristic of wind-induced internal pressure of the structure with openings was studied. Variety laws of mean and fluctuating wind-induced internal pressure coefficients with azimuths, location and number of the openings, rise-span ratio were studied as well. Furthermore, the characteristics of the three-dimensional power spectrum densities (PSD) of wind-induced internal pressure with the change of wind direction were studied under different conditions. The study results provide important reference for wind resistance design of the roof structure with multiple openings in curtain walls.Keywords: large-span roof; multiple openings in curtain wall; wind-induced internal pressure; power spectrum
*国家自然科学基金重大研究计划（91215302）。通讯作者：李秋胜，博士，教授，中组部千人计划国家特聘专家，教育部长江学者讲座教授，Email: bcqsli@cityu.edu.hk。
