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(1中國建筑設(shè)計(jì)研究院有限公司， 北京 100044；2 中國建筑科學(xué)研究院有限公司，北京 100013；3 中建三局第一建設(shè)工程有限責(zé)任公司，武漢 430040)
［摘要］雄安站屋蓋體型獨(dú)特，屬于風(fēng)荷載敏感結(jié)構(gòu)，抗風(fēng)設(shè)計(jì)非常重要。為明確風(fēng)荷載取值，對雄安站進(jìn)行了剛性模型風(fēng)洞試驗(yàn)。在風(fēng)洞試驗(yàn)的基礎(chǔ)上，著重分析了屋蓋懸挑部分風(fēng)荷載的分布情況。結(jié)果表明，屋蓋懸挑上表面在劇烈流動分離的影響下風(fēng)荷載體型系數(shù)可達(dá)到-2.3；雨棚局部鏤空區(qū)域?qū)︼L(fēng)荷載的影響較小?；陲L(fēng)洞試驗(yàn)得到的風(fēng)壓時(shí)程，對屋蓋結(jié)構(gòu)進(jìn)行了風(fēng)致響應(yīng)計(jì)算，并給出高架候車廳屋蓋及雨棚各結(jié)構(gòu)單元不利風(fēng)向角。最后，采用有限元軟件Fluent對過站列車風(fēng)進(jìn)行數(shù)值模擬分析，得到列車風(fēng)風(fēng)壓的空間分布形態(tài)。列車過站時(shí)，結(jié)構(gòu)上的列車風(fēng)壓力峰值隨車體與結(jié)構(gòu)距離增大迅速衰減，在列車以350km/h速度運(yùn)行通過時(shí)，高架候車層可滿足舒適性要求。
［關(guān)鍵詞］雄安站；大跨屋蓋結(jié)構(gòu)；風(fēng)荷載體型系數(shù);風(fēng)洞試驗(yàn)；風(fēng)振分析；列車風(fēng)
中圖分類號：TU312，U292 文獻(xiàn)標(biāo)識碼：A文章編號：1002-848X(2021)24-0013-08
Study on wind tunnel test and wind-induced response of long-span structure for Xiong’an Railway Station
ZHANG Yu1, HE Lianhua2, FU Longbiao2, FAN Zhong1, ZHU Dan1, LIU Tao1, LI Baowei3, ZHOU Pengfei3
(1 China Architecture Design & Research Group, Beijing 100044， China；2 China Academy of Building Research, Beijing 100013，China；3 China Construction Third Bureau First Engineering Co., Ltd., Wuhan 430040， China)
Abstract: The roof of Xiong’an railway station has a unique shape, which is a wind load sensitive structure, so that the wind resistance design is very important. In order to clarify the value of the wind load, the rigid model wind tunnel test was carried out. Based on the wind tunnel test, the wind load distribution of the cantilevered part of the roof was analyzed emphatically. The results show that the wind load shape coefficient of the cantilever upper surface of the roof can reach -2.3 under the influence of violent flow separation. The local hollowed out area of the canopy has little influence on the wind load. Based on the wind pressure time-history obtained from the wind tunnel test, the wind-induced response of the roof structure was calculated, and the adverse wind attack angle of each structural unit of the roof and canopy were given. Furthermore, Fluent software was used to simulate the train induced wind when passing through the station, and the spatial distribution of the train induced wind pressure was obtained. When the train passes the station, the peak value of wind pressure on the structure decreases rapidly with the increase of the distance between the train and the structure. When the train runs through at the speed of 350km/h, the overhead layer can meet the comfort requirements.
Keywords: Xiong’an Railway Station； large-span roof structure； wind load shape coefficient； wind tunnel test； wind-induced vibration analysis； train induced wind
作者簡介：張宇，碩士，工程師，Email:zhangy130@cadg.cn。
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