多幕墻開洞對大跨屋蓋結(jié)構(gòu)風(fēng)致內(nèi)壓的影響*
趙曉紅1，李秋勝1,2，陳伏彬1
- 摘 要
-
（1 湖南大學(xué)土木工程學(xué)院，長沙 410082； 2 香港城市大學(xué)建筑學(xué)及土木工程學(xué)系，香港 999077）
［摘要］采用剛性模型風(fēng)洞試驗研究多幕墻開洞時的內(nèi)部風(fēng)效應(yīng)。設(shè)計制作了具有不同體積、不同開洞孔狀態(tài)的大跨房屋模型來進(jìn)行多參數(shù)對比風(fēng)洞試驗。研究了開洞結(jié)構(gòu)風(fēng)致內(nèi)壓的空間分布特性，風(fēng)致平均內(nèi)壓及脈動內(nèi)壓系數(shù)隨風(fēng)向角、開洞位置、開洞數(shù)量及矢跨比的變化規(guī)律，并進(jìn)一步探討了風(fēng)致內(nèi)壓隨風(fēng)向變化的三維功率譜密度函數(shù)在不同狀態(tài)下的特征。研究結(jié)果對多幕墻開洞(孔)的屋蓋結(jié)構(gòu)的抗風(fēng)設(shè)計具有重要的參考價值。［關(guān)鍵詞］大跨屋蓋; 多幕墻開洞; 風(fēng)致內(nèi)壓; 功率譜中圖分類號：TU312+.1 文獻(xiàn)標(biāo)識碼：A 文章編號：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
*國家自然科學(xué)基金重大研究計劃（91215302）。通訊作者：李秋勝，博士，教授，中組部千人計劃國家特聘專家，教育部長江學(xué)者講座教授，Email: bcqsli@cityu.edu.hk。
