| 斜拉索风雨激振三维模型试验研究 |
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| 引用本文： | 李薇,胡兆同,薛晓锋,王莹.斜拉索风雨激振三维模型试验研究[J].中国安全科学学报,2011,21(12). |
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| 作者姓名： | 李薇 胡兆同 薛晓锋 王莹 |
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| 作者单位： | 1. 长安大学公路学院,陕西西安710064;广东水利电力职业技术学院市政工程系,广东广州510635
2. 长安大学公路学院,陕西西安,710064 |
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| 基金项目： | 拱形钢塔斜拉桥建设和养护关键技术研究与工程示范(2011H17) |
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| 摘 要： | 为研究风雨共同作用下拉索的气动力特性,以之江大桥为背景,通过对斜拉索的三维刚性节段模型做测力、测压风洞试验,得到4种表面形态下的拉索在不同风向角时的平均和脉动风压系数,结果表明:水线位置强烈影响拉索表面的风压系数分布,靠近水线附近气流的分离点会产生明显的改变,仅当上水线处于某些特定位置时,气动力系数变化明显,拉索才可能发生振动;用测压试验的风压系数积分得到的阻力系数要比测力试验的小10%左右,这是测压试验无法获得气动力中的摩擦分量所导致的。
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| 关 键 词： | 斜拉索 风雨激振 三维模型 风洞试验 风压分布 气动力系数 |
Experimental Study on Rain-wind-induced Vibration of Three-dimensional Model in Stay Cable |
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| LI Wei
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HU Zhao-tong
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XUE Xiao-feng
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WANG Ying.Experimental Study on Rain-wind-induced Vibration of Three-dimensional Model in Stay Cable[J].China Safety Science Journal,2011,21(12). |
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| Authors: | LI Wei HU Zhao-tong XUE Xiao-feng WANG Ying |
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| Institution: | LI Wei1,2 HU Zhao-tong1 XUE Xiao-feng1 WANG Ying1(1 School of Highway,Chang'an University,Xi'an Shaanxi 710064,China 2 Department of Municipal Engineering,Guangdong Power Vocational and Technical College,Guangzhou Guangdong 510635,China) |
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| Abstract: | To study the aerodynamic characteristics of stray cable under wind and rain,with Zhijiang bridge as the background,force and pressure experiments on the three-dimensional model of stay cable in wind tunnel were conducted,and mean and fluctuating wind-pressure coefficients with 3 kinds of surface morphology under different wind direction angles were obtained.The results show that the rivulet position would influence the pressure coefficient distribution of cable surface strongly,and the separation point of f... |
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| Keywords: | stay cable rain-wind-induced vibration three-dimensional model wind tunnel test wind pressure distribution aerodynamic force coefficient |
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