本文選題：圍護(hù)結(jié)構(gòu) + 平屋蓋�。� 參考：《建筑結(jié)構(gòu)學(xué)報(bào)》2017年03期

【摘要】：對(duì)比分析了中國(guó)GB 50009—2012、德國(guó)DIN 1055-4、美國(guó)ASCE/SEI 7-10、日本AIJ-2004、歐洲BS EN 1991-1-4:2005、加拿大NBC-2005、澳大利亞/新西蘭AS/NZS 1170.2:2011、英國(guó)BS 6399-2:1997等規(guī)范中關(guān)于平屋蓋圍護(hù)結(jié)構(gòu)外表面設(shè)計(jì)風(fēng)壓的有關(guān)規(guī)定。為便于比較,將各國(guó)規(guī)范風(fēng)荷載標(biāo)準(zhǔn)值統(tǒng)一換算為外表面設(shè)計(jì)風(fēng)壓系數(shù)與基本風(fēng)壓乘積的形式。并且將外表面設(shè)計(jì)風(fēng)壓統(tǒng)一換算為與時(shí)距10min、重現(xiàn)期50 a的基本風(fēng)速相對(duì)應(yīng)的值。針對(duì)外表面設(shè)計(jì)風(fēng)壓相關(guān)因素,對(duì)風(fēng)向、風(fēng)壓分區(qū)、面積折減、建筑尺寸等進(jìn)行了對(duì)比研究。最后,結(jié)合平屋蓋風(fēng)洞試驗(yàn),探討了外表面設(shè)計(jì)風(fēng)壓的具體取值建議。研究表明:平屋蓋圍護(hù)結(jié)構(gòu)外表面設(shè)計(jì)風(fēng)壓的確定,建議考慮360°全風(fēng)向;對(duì)屋蓋邊緣應(yīng)進(jìn)行風(fēng)壓分區(qū),角部也應(yīng)進(jìn)行單獨(dú)的風(fēng)壓分區(qū);屋蓋表面不同位置建議采用不同的面積折減公式;針對(duì)不同高度或?qū)捀弑冉ㄖo定不同的外表面設(shè)計(jì)風(fēng)壓建議取值。
[Abstract]:This paper compares and analyzes the relevant regulations on the wind pressure of the outer surface design of flat roof enclosure in China GB 50009-2012, Germany DIN 1055-4, USA ASCE/SEI 7-10, Japan AIJ-2004, European BS en 1991-1-4: 2005, Canada NBC-2005, Australia / New Zealand AS/NZS 1170.2: 2011and British BS 6399-2: 1997. For the sake of comparison, the standard values of wind loads of various countries are converted into the product of the outer surface design wind pressure coefficient and the basic wind pressure. The external surface design wind pressure is converted to the basic wind speed corresponding to the time interval of 10 minutes and the recurrence period of 50 years. The wind direction, wind pressure zoning, area reduction, building size and so on are compared in terms of the factors related to the wind pressure of the outer surface design. Finally, combined with the wind tunnel test of the flat roof, the concrete value of the external surface design wind pressure is discussed. The results show that the wind pressure on the outer surface of the flat roof enclosure is determined by considering the total wind direction of 360 擄, the roof edge should be partitioned by wind pressure, and the corner should be divided into separate wind pressure zones. It is suggested that different area reduction formulas should be used in different position of roof surface and the value of wind pressure should be recommended for the different height or aspect ratio of building to design different external surface pressure.
【作者單位】： 北京交通大學(xué)土木建筑工程學(xué)院;北京交通大學(xué)結(jié)構(gòu)風(fēng)工程與城市風(fēng)環(huán)境北京市重點(diǎn)實(shí)驗(yàn)室;
【基金】：國(guó)家自然科學(xué)基金重大研究計(jì)劃集成項(xiàng)目(91215302);國(guó)家自然科學(xué)基金項(xiàng)目(51378061) 高等學(xué)校學(xué)科創(chuàng)新引智計(jì)劃項(xiàng)目(B13002) 北京市自然科學(xué)基金項(xiàng)目(8152023)
【分類號(hào)】：TU312.1

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