降雨冲击力试验研究
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摘要
采用弹性悬挂装置制作了三向风雨天平,并利用其进行了模拟降雨冲击力试验。实测了不同降雨强度、不同雨滴下落高度对结构的冲击力,研究了降雨对结构的平均冲击力和脉动冲击力与雨强、雨滴降落高度的关系。研究表明:降雨对结构产生平均冲击力和脉动冲击力。平均冲击力与雨强成正比,随雨滴降落的高度增加先增大,后减小。在强降雨时,脉动冲击力均方根值与降雨强度成线性关系,其主频率与结构固有频率一致。因此,研究在不同降雨强度下的力学性能具有重要意义。
Developed a wind-rain balance, and used it to measure the time-history curve of impact, which is acted on the structure under different rainfall intensity and different falling heights of raindrops. The rule of the impact on a structure under different rainfall intensity and different raindrops falling height is obtained by analyzing and by imitating the collision between raindrops and structure. The results show that the average impact and the pulse impact generated by the rainfall action on a structure can exert an influence. Therefore, researches on the mechanical property under different rainfall intensity will be of great significance.
Developed a wind-rain balance, and used it to measure the time-history curve of impact, which is acted on the structure under different rainfall intensity and different falling heights of raindrops. The rule of the impact on a structure under different rainfall intensity and different raindrops falling height is obtained by analyzing and by imitating the collision between raindrops and structure. The results show that the average impact and the pulse impact generated by the rainfall action on a structure can exert an influence. Therefore, researches on the mechanical property under different rainfall intensity will be of great significance.
引文
[1]项海帆,葛耀君.大跨度桥梁抗风技术挑战与基础研究[J].中国工程科学,2011,13(9):1―14.Xiang Haifan,Ge Yaojun.Wind resistance challenges and fundamental research on long-span bridges[J].Engineering Science,2011,13(9):1―14.(in Chinese)
[2]盛裴轩,毛节泰,李建国.大气物理学[M].北京:北京大学出版社,2003:14―15.Sheng Peixuan,Mao Jietai,Li Jianguo.Atmospheric physics[M].Beijing:Peking University Press,2003:14―15.(in Chinese)
[3]李宏男,任月明,白海峰.输电塔体系风雨激励的动力分析模型[J].中国电机工程学报,2007,27(30):43―48.Li Hongnan,Ren Yueming,Bai Haifeng.Rain-windinduced dynamic model for transmission tower system[J].Proceedings of the CSEE,2007,27(30):43―48.(in Chinese).
[4]Edmund C C Choi.Wind-driven rain and driving rain coefficient during thunderstorms and non-thunderstorms[J].Journal of Wind Engineering and Industrial Aerodynamics,2001,89:293―308.
[5]Jonas Olsson,Cintia B Uvo,Kenji Jinno.Relationship between Air Flow Indices and Local Rainfall in Kyushu Japan[J].Annual Journal of Hydraulic Engineering,JSCE,1999,43(2):263―268.
[6]吴小平.低层房屋风雨作用效应的数值研究[D].杭州:浙江大学,2008.Wu Xiaoping.Numerical study of wind-rain inter action effect on low-rise building[D].Hangzhou:Zhejiang University,2008.(in Chinese)
[7]白海峰,李宏男.架空输电线路风雨致振动响应研究[J].电网技术,2009,33(2):36―40.Bai Haifeng,Li Hongnan.Dynamic response of overhead transmission lines to oscillation caused by wind or rainfall loads[J].Power System Technology,2009,33(2):36―40.(in Chinese)
[8]Kikuchi N,Matsuzaki Y,Yukino T,et al.Aerodynamic drag of new-design electric power wire in a heavy rainfall and wind[J].Journal of Wind Engineering and Industrail Aerodynamics,2003,91(1):41―51.
[9]辛大波,王亮,欧进萍,李惠.风雨联合作用下大跨桥梁颤振稳定性试验研究[J].土木工程学报,2012,45(3):110―115.Xin Dabo,Wang Liang,Ou Jinping,Li Hui.Experimental study on the flutter stability of long-span bridges subjected to wind and rain[J].China Civil Engineering Journal,2012,45(3):110―115.(in Chinese)
[10]胡俊,欧进萍.风雨共同作用下大跨悬索桥加劲梁抖振响应分析[J].中国铁道科学,2013,34(6):30―35.Hu Jun,Ou Jinping.Buffeting response analysis of long-span suspension bridges stiffening girder under wind-rain combined action[J].China Railway Science,2013,34(6):30―35.(in Chinese)
[11]禹见达,陈政清,王修勇.基于现场观测的拉索风雨振特性研究[J].湖南科技大学学报,2006,21(2):22―25.Yu Jianda,Chen Zhengqing,Wang Xiuyong.Study on characterization of rain-wind induced stay-cable vibrations from field measurements[J].Journal of Hunan University of Science&Technology,2006,21(2):22―25.(in Chinese)
[2]盛裴轩,毛节泰,李建国.大气物理学[M].北京:北京大学出版社,2003:14―15.Sheng Peixuan,Mao Jietai,Li Jianguo.Atmospheric physics[M].Beijing:Peking University Press,2003:14―15.(in Chinese)
[3]李宏男,任月明,白海峰.输电塔体系风雨激励的动力分析模型[J].中国电机工程学报,2007,27(30):43―48.Li Hongnan,Ren Yueming,Bai Haifeng.Rain-windinduced dynamic model for transmission tower system[J].Proceedings of the CSEE,2007,27(30):43―48.(in Chinese).
[4]Edmund C C Choi.Wind-driven rain and driving rain coefficient during thunderstorms and non-thunderstorms[J].Journal of Wind Engineering and Industrial Aerodynamics,2001,89:293―308.
[5]Jonas Olsson,Cintia B Uvo,Kenji Jinno.Relationship between Air Flow Indices and Local Rainfall in Kyushu Japan[J].Annual Journal of Hydraulic Engineering,JSCE,1999,43(2):263―268.
[6]吴小平.低层房屋风雨作用效应的数值研究[D].杭州:浙江大学,2008.Wu Xiaoping.Numerical study of wind-rain inter action effect on low-rise building[D].Hangzhou:Zhejiang University,2008.(in Chinese)
[7]白海峰,李宏男.架空输电线路风雨致振动响应研究[J].电网技术,2009,33(2):36―40.Bai Haifeng,Li Hongnan.Dynamic response of overhead transmission lines to oscillation caused by wind or rainfall loads[J].Power System Technology,2009,33(2):36―40.(in Chinese)
[8]Kikuchi N,Matsuzaki Y,Yukino T,et al.Aerodynamic drag of new-design electric power wire in a heavy rainfall and wind[J].Journal of Wind Engineering and Industrail Aerodynamics,2003,91(1):41―51.
[9]辛大波,王亮,欧进萍,李惠.风雨联合作用下大跨桥梁颤振稳定性试验研究[J].土木工程学报,2012,45(3):110―115.Xin Dabo,Wang Liang,Ou Jinping,Li Hui.Experimental study on the flutter stability of long-span bridges subjected to wind and rain[J].China Civil Engineering Journal,2012,45(3):110―115.(in Chinese)
[10]胡俊,欧进萍.风雨共同作用下大跨悬索桥加劲梁抖振响应分析[J].中国铁道科学,2013,34(6):30―35.Hu Jun,Ou Jinping.Buffeting response analysis of long-span suspension bridges stiffening girder under wind-rain combined action[J].China Railway Science,2013,34(6):30―35.(in Chinese)
[11]禹见达,陈政清,王修勇.基于现场观测的拉索风雨振特性研究[J].湖南科技大学学报,2006,21(2):22―25.Yu Jianda,Chen Zhengqing,Wang Xiuyong.Study on characterization of rain-wind induced stay-cable vibrations from field measurements[J].Journal of Hunan University of Science&Technology,2006,21(2):22―25.(in Chinese)