CAJ | 학술논문

在均匀风场中对平屋面结构进行内外压同步测量风洞试验。由内压功率谱分析认为，该试验须严格遵守内压相似定律以获得正确的 Helmholtz 共振频率。在此基础上将平屋面结构设计成典型平板网架结构，并进行内外压作用下屋盖风致响应分析，研究开洞面积、背景孔隙、风向角及结构阻尼比等参数对屋盖竖向位移响应影响。结果表明，增大开洞面积及减小背景孔隙，屋盖竖向位移均方根值呈增大趋势；结构阻尼比对屋面竖向位移影响极小；迎风开洞时屋盖竖向位移远大于其它风向；脉动内压对屋盖位移响应贡献主要体现于背景分量。
재균균풍장중대평옥면결구진행내외압동보측량풍동시험。유내압공솔보분석인위，해시험수엄격준수내압상사정률이획득정학적 Helmholtz 공진빈솔。재차기출상장평옥면결구설계성전형평판망가결구，병진행내외압작용하옥개풍치향응분석，연구개동면적、배경공극、풍향각급결구조니비등삼수대옥개수향위이향응영향。결과표명，증대개동면적급감소배경공극，옥개수향위이균방근치정증대추세；결구조니비대옥면수향위이영향겁소；영풍개동시옥개수향위이원대우기타풍향；맥동내압대옥개위이향응공헌주요체현우배경분량。
Internal and external pressures on a flat roof structure were tested in a uniform wind field by applying the synchronous pressure measurement technique.To obtain the accurate Helmholtz resonance frequency,the scaling requirement of internal pressure was strictly ensured.The flat roof structure was designed as a typical plate type truss structure,and the effects of opening area,background porosity,wind direction and damping ratio on the vertical displacement of roof were analyzed.The results show that the root-mean-square value of vertical displacement increases with the increase of opening area and with the decrease of background porosity.The damping ratio has nothing to do with the roof displacement response.The vertical displacement in the case of windward opening is significantly larger than in the case of other wind direction opening.The contribution of fluctuating internal pressure on roof displacement response is mainly attributed to its background component.