大跨开合屋盖风荷载与风致响应试验与数值计算研究
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摘要
为研究屋盖开孔对大跨结构风效应的影响,在边界层风洞中开展了大跨开合屋盖刚性模型风洞测压试验,分析了结构表面风荷载分布特征,基于时域分析法研究了屋盖开合对风致响应的影响。结果表明:大跨结构模态密集,第一阶模态能量最大,高阶成分的贡献不容忽视;屋盖开洞能有效的减小屋面风荷载,降低位移响应与加速度响应,减小风振系数。研究结果可为大跨开合屋盖风荷载设计提供参考。
To study the effect of roof opening on wind effect of large-span roof structure, wind tunnel tests on a large-span retractable roof were carried out in a boundary layer wind tunnel, then the characteristics of wind loads on the roof were studied, and the wind-induced responses influenced by the opening were investigated in time domain. The results induct that the models for the large-span structure are concentrated, the largest modal energy occurred in first model, and the contributions from higher order are not ignored. The wind loads reduced when the roof with opening, the same tendency was found for wind induced displacement response and acceleration response. The output will be a reference for wind load design of large-span retractable roof.
To study the effect of roof opening on wind effect of large-span roof structure, wind tunnel tests on a large-span retractable roof were carried out in a boundary layer wind tunnel, then the characteristics of wind loads on the roof were studied, and the wind-induced responses influenced by the opening were investigated in time domain. The results induct that the models for the large-span structure are concentrated, the largest modal energy occurred in first model, and the contributions from higher order are not ignored. The wind loads reduced when the roof with opening, the same tendency was found for wind induced displacement response and acceleration response. The output will be a reference for wind load design of large-span retractable roof.
引文
[1] Kawai H. Structure of conical vortices related with suction fluctuation on a flat roof in oblique smooth and turbulence flows[J]. Journal of Wind Engineering and Industrial Aerodynamics, 1997, 69-71: 579-588.
[2] LI B, YANG Q, TIAN Y, et al. Wind load characteristics of retractable roof of New National Tennis Center[J]. China Civil Engineering Journal, 2010, 43: 112-118.
[3] Banks D, Meroney R N, Sarkar P P, et al. Flow visualization of conical vortices on flat roofs with simultaneous surface pressure measurement[J]. Journal of Wind Engineering and Industrial Aerodynamics, 2000, 84(1): 65-85.
[4] Kawai H, Nishimura G. Characteristics of fluctuating suction and conical vortices on a flat roof in oblique flow[J]. Journal of Wind Engineering and Industrial Aerodynamics, 1996, 211-225.
[5] Banks D, Meroney R N. A model of roof-top surface pressures produced by conical vortices: Evaluation and implications[J]. Wind and Structures An International Journal, 2001, 4(4): 279-298.
[6] Nishimura H, Kawai H. Switching phenomenon of conical vortices on the flat roof of a low-rise building[J]. Jotrnal of Wind Engineering (Japan), 2010, 4(125): 99-106.
[7] Marwood R, Wood C J. Conical vortex movement and its effect on roof pressures[J]. Journal of Wind Engineering and Industrial Aerodynamics, 1997, 69-71: 589-595.
[8] YE Jihon, DONG Xin. Wind pressure features of large-span flat roof in different wind fields induced by conical vortex[J]. Journal-Chinese Institute of Engineers, 2015, 38(8): 1-16.
[9] Kawai H. Local peak pressure and conical vortex on building[J]. Journal of Wind Engineering and Industrial Aerodynamics, 2002, 90(4): 251-263.
[10] Kumar K S, Stathopoulos T. Wind loads on low building roofs: a stochastic perspective[J]. Journal of Journal of Structural Engineering, 2000, 126(8): 944-956.
[11] 秦乐, 田玉基. 某大跨平屋盖表面风荷载特性研究[J]. 建筑结构, 2012, 42(2): 160-164.QIN Le, TIAN Yuji. Research on wind load on a large-span plan roof[J]. Building Structure, 2012, 42(2): 160-164. (in Chinese)
[12] 李寿科, 李寿英, 陈政清. 开合屋盖体育场风荷载特性试验研究[J]. 建筑结构学报, 2010, 31(10): 17-23.LI Shouke, LI Shouying, CHEN Zhengqing. Experimental investigation on wind loading of a stadium with a retractable roof[J]. Journal of Building Structures, 2010, 31(10): 17-23. (in Chinese)
[13] 孙瑛, 武岳, 林志兴, 等. 大跨度平屋盖表面的特征湍流研究[J]. 空气动力学学报, 2007, 25(3): 319-324.SUN Ying, WU Yue, LIN Zhixing, et al. Characteristics of signature turbulence on long span flat roofs[J]. ACTA Aerodynamic Sinica, 2007, 25(3): 319-324. (in Chinese)
[14] 陈伏彬, 李秋胜, 傅继阳, 等. 大跨屋盖风荷载的频域特性试验研究[J].振动与冲击, 2012, 31(5): 111-117.CHEN Fubin, LI Qiusheng, FU Jiyang, et al. Frequency domain characteristics of wind loads on a long span building roof[J]. Journal of Vibration and Shock, 2012, 31(5): 111-117. (in Chinese)
[15] 陈伏彬, 李秋胜.基于环境激励的大跨结构动力特性识别[J]. 地震工程与工程振动, 2015, 35(1):58-65.CHEN Fubin, LI Qiusheng. Identification of dynamic characteristics of large-span structure based on the ambient excitation[J]. Earthquake Engineering and Engineering Dynamics, 2015, 35(1): 58-65. (in Chinese)
[2] LI B, YANG Q, TIAN Y, et al. Wind load characteristics of retractable roof of New National Tennis Center[J]. China Civil Engineering Journal, 2010, 43: 112-118.
[3] Banks D, Meroney R N, Sarkar P P, et al. Flow visualization of conical vortices on flat roofs with simultaneous surface pressure measurement[J]. Journal of Wind Engineering and Industrial Aerodynamics, 2000, 84(1): 65-85.
[4] Kawai H, Nishimura G. Characteristics of fluctuating suction and conical vortices on a flat roof in oblique flow[J]. Journal of Wind Engineering and Industrial Aerodynamics, 1996, 211-225.
[5] Banks D, Meroney R N. A model of roof-top surface pressures produced by conical vortices: Evaluation and implications[J]. Wind and Structures An International Journal, 2001, 4(4): 279-298.
[6] Nishimura H, Kawai H. Switching phenomenon of conical vortices on the flat roof of a low-rise building[J]. Jotrnal of Wind Engineering (Japan), 2010, 4(125): 99-106.
[7] Marwood R, Wood C J. Conical vortex movement and its effect on roof pressures[J]. Journal of Wind Engineering and Industrial Aerodynamics, 1997, 69-71: 589-595.
[8] YE Jihon, DONG Xin. Wind pressure features of large-span flat roof in different wind fields induced by conical vortex[J]. Journal-Chinese Institute of Engineers, 2015, 38(8): 1-16.
[9] Kawai H. Local peak pressure and conical vortex on building[J]. Journal of Wind Engineering and Industrial Aerodynamics, 2002, 90(4): 251-263.
[10] Kumar K S, Stathopoulos T. Wind loads on low building roofs: a stochastic perspective[J]. Journal of Journal of Structural Engineering, 2000, 126(8): 944-956.
[11] 秦乐, 田玉基. 某大跨平屋盖表面风荷载特性研究[J]. 建筑结构, 2012, 42(2): 160-164.QIN Le, TIAN Yuji. Research on wind load on a large-span plan roof[J]. Building Structure, 2012, 42(2): 160-164. (in Chinese)
[12] 李寿科, 李寿英, 陈政清. 开合屋盖体育场风荷载特性试验研究[J]. 建筑结构学报, 2010, 31(10): 17-23.LI Shouke, LI Shouying, CHEN Zhengqing. Experimental investigation on wind loading of a stadium with a retractable roof[J]. Journal of Building Structures, 2010, 31(10): 17-23. (in Chinese)
[13] 孙瑛, 武岳, 林志兴, 等. 大跨度平屋盖表面的特征湍流研究[J]. 空气动力学学报, 2007, 25(3): 319-324.SUN Ying, WU Yue, LIN Zhixing, et al. Characteristics of signature turbulence on long span flat roofs[J]. ACTA Aerodynamic Sinica, 2007, 25(3): 319-324. (in Chinese)
[14] 陈伏彬, 李秋胜, 傅继阳, 等. 大跨屋盖风荷载的频域特性试验研究[J].振动与冲击, 2012, 31(5): 111-117.CHEN Fubin, LI Qiusheng, FU Jiyang, et al. Frequency domain characteristics of wind loads on a long span building roof[J]. Journal of Vibration and Shock, 2012, 31(5): 111-117. (in Chinese)
[15] 陈伏彬, 李秋胜.基于环境激励的大跨结构动力特性识别[J]. 地震工程与工程振动, 2015, 35(1):58-65.CHEN Fubin, LI Qiusheng. Identification of dynamic characteristics of large-span structure based on the ambient excitation[J]. Earthquake Engineering and Engineering Dynamics, 2015, 35(1): 58-65. (in Chinese)