CAJ | 학술논문

基于实测房屋模型风洞试验，分析了屋盖角部不同开孔大小和开孔形状情况下低矮房屋的风荷载特性。内外压的叠加作用使屋盖上出现了很大的正风压，内压整体分布均匀，开孔面积越小，内压作用越强；内压的概率密度接近于高斯分布，净压的非高斯特性相比于外压有所减弱；内压在频域内也表现出很强的相关性，内压谱在 Helmholtz频率和漩涡脱落频率处均出现了谱峰值，净压谱中漩涡脱落作用被抵消；内压的荷载特性间接反映出迎风前缘的长度有利于锥形涡的发展，成对出现的锥形涡并非同时同步达到最强。
기우실측방옥모형풍동시험，분석료옥개각부불동개공대소화개공형상정황하저왜방옥적풍하재특성。내외압적첩가작용사옥개상출현료흔대적정풍압，내압정체분포균균，개공면적월소，내압작용월강；내압적개솔밀도접근우고사분포，정압적비고사특성상비우외압유소감약；내압재빈역내야표현출흔강적상관성，내압보재 Helmholtz빈솔화선와탈락빈솔처균출현료보봉치，정압보중선와탈락작용피저소；내압적하재특성간접반영출영풍전연적장도유리우추형와적발전，성대출현적추형와병비동시동보체도최강。
Based on the wind tunnel testing of a low-rise building,the wind pressure characteristics of the low-rise building with holes of different sizes and shapes on its roof corner were analyzed.The super-imposition of internal and external pressures makes the emergence of large positive pressure on the roof. The internal pressure shows an overall uniform distribution.With the opening area becoming smaller,the internal pressure gets stronger.The probability density function of the internal pressure is closer to the Gaussian distribution,and when compared with external pressure,the non-Gaussian characteristic of net pressure is weakened.The internal pressure also exhibits a strong correlation in frequency domain.There appear two humps in the internal pressure spectrum corresponding to Helmholtz frequency and vortex shedding frequency,and the peak of the vortex shedding frequency is offset for the case of net pressure. Furthermore,the internal pressure characteristics indirectly show that the length of the front edge en-hances the development of the conical vortices and the conical vortices appearing in pairs do not become the strongest simultaneously.