U形大跨悬挑屋盖风荷载风洞试验和数值模拟研究
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摘要
采用风洞试验和CFD数值模拟方法,对某U形大跨悬挑屋盖风荷载进行了研究。通过1/200缩尺比的刚性模型测压风洞试验,得到了屋盖表面的平均和脉动风压系数分布特征;采用CFD定常数值模拟计算了屋盖的绕流特性,并与风洞试验结果对比,验证了数值模拟结果的有效性,基于CFD数值模拟所得流场,分析了屋盖周围的流动特性。结果表明,大跨屋盖边缘因存在明显的流动分离现象,使得该处存在较大风吸力。
Wind load on a long-span cantilevered roof with U type was studied both by wind tunnel test and numerical simulation. The mean and fluctuating wind pressure coefficient distribution characteristics on the roof was obtained by a 1/200 scaled rigid model wind tunnel test. A steady-state CFD numerical simulation was used to study the flow around the roof. The simulation results were verified to be effective by comparison with correspondingly wind tunnel experimental data. The flow field around the roof was analyzed based on CFD simulation results. The results show that large wind suction was found around the long-span roof edge due to flow separation.
Wind load on a long-span cantilevered roof with U type was studied both by wind tunnel test and numerical simulation. The mean and fluctuating wind pressure coefficient distribution characteristics on the roof was obtained by a 1/200 scaled rigid model wind tunnel test. A steady-state CFD numerical simulation was used to study the flow around the roof. The simulation results were verified to be effective by comparison with correspondingly wind tunnel experimental data. The flow field around the roof was analyzed based on CFD simulation results. The results show that large wind suction was found around the long-span roof edge due to flow separation.
引文
[1] 朱川海,顾明.大型体育场主看台挑篷抗风研究现状及展望[J].空间结构,2005,11(2):27-33.
[2] BARNARD R H.Predicting dynamic wind loading on cantilevered canopy roof structures [J].Journal of Wind Engineering and Industrial Aerodynamics,2000,85(1):47-57.
[3] 罗尧治,丁慧.波纹表面月牙形悬挑屋盖风荷载特性 [J].浙江大学学报(工学版),2013,47(6):1063-1071.
[4] 张建,李波,单文姗,等.波纹状悬挑大跨屋盖的风荷载特性[J].建筑结构学报,2017,38(3):111-117.
[5] 张朝晖,陈朝晖,陈丰,等.有干扰的大跨度体育场屋盖表面风荷载特性研究[J].建筑结构,2012,42(2):154-159.
[6] 李波,冯少华,杨庆山,等.体育场月牙形大跨悬挑屋盖风荷载特性[J].哈尔滨工程大学学报,2013,34(5):588-592.
[7] 李超,陈水福,盛建康.局部构造对月牙形凸屋盖风荷载影响的研究[J].空间结构,2010,16(3):47-54.
[8] 朱川海,顾明.体育场悬挑屋盖结构的风荷载及干扰影响的风洞试验研究[J].特种结构,2002,19(4):41-44.
[9] 田永胜,李寿英,陈政清.体育场双挑篷风荷载干扰效应的试验研究[J].振动与冲击,2009,28(3):136-140.
[10] 周晅毅,顾明,黄友钦,等.基于非定常风荷载的大跨体育场挑篷结构风致响应[J].同济大学学报(自然科学版),2008,36(11):1490-1495.
[11] 顾明,朱川海.体育场主看台弧形挑篷气弹模型风洞试验和响应特性[J].土木工程学报,2006,39(10):54-59.
[2] BARNARD R H.Predicting dynamic wind loading on cantilevered canopy roof structures [J].Journal of Wind Engineering and Industrial Aerodynamics,2000,85(1):47-57.
[3] 罗尧治,丁慧.波纹表面月牙形悬挑屋盖风荷载特性 [J].浙江大学学报(工学版),2013,47(6):1063-1071.
[4] 张建,李波,单文姗,等.波纹状悬挑大跨屋盖的风荷载特性[J].建筑结构学报,2017,38(3):111-117.
[5] 张朝晖,陈朝晖,陈丰,等.有干扰的大跨度体育场屋盖表面风荷载特性研究[J].建筑结构,2012,42(2):154-159.
[6] 李波,冯少华,杨庆山,等.体育场月牙形大跨悬挑屋盖风荷载特性[J].哈尔滨工程大学学报,2013,34(5):588-592.
[7] 李超,陈水福,盛建康.局部构造对月牙形凸屋盖风荷载影响的研究[J].空间结构,2010,16(3):47-54.
[8] 朱川海,顾明.体育场悬挑屋盖结构的风荷载及干扰影响的风洞试验研究[J].特种结构,2002,19(4):41-44.
[9] 田永胜,李寿英,陈政清.体育场双挑篷风荷载干扰效应的试验研究[J].振动与冲击,2009,28(3):136-140.
[10] 周晅毅,顾明,黄友钦,等.基于非定常风荷载的大跨体育场挑篷结构风致响应[J].同济大学学报(自然科学版),2008,36(11):1490-1495.
[11] 顾明,朱川海.体育场主看台弧形挑篷气弹模型风洞试验和响应特性[J].土木工程学报,2006,39(10):54-59.