| 基于DEA的铁路桥梁风屏障防风效果评价 |
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| 引用本文： | 向活跃,李永乐,廖海黎.基于DEA的铁路桥梁风屏障防风效果评价[J].西南交通大学学报,2012,47(4):546-550,566. |
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| 作者姓名： | 向活跃 李永乐 廖海黎 |
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| 作者单位： | 西南交通大学土木工程学院,四川成都,610031 |
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| 基金项目： | 四川省科技支撑计划资助项目(2011GZ0240);中央高校基本科研业务费专项资金资助项目(SWJTU11CX008,SWJTU11CX127);西南交通大学博士生创新基金的资助 |
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| 摘 要： | 为评价风屏障的防风效果,针对铁路桥梁设置不同高度的风屏障,通过风洞试验测试了单车以及双车交会时的气动力系数.在此基础上,提出用单车的气动力系数衡量车辆风荷载突变效应,以不同轨道位置车辆的风荷载突变量作为评价指标,并采用DEA(数据包络分析)方法评价风屏障的防风效果.研究结果表明:用DEA方法评价铁路桥梁风屏障的防风效果是可行的;当风屏障高度为1.72 m时,防风效果较好.
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| 关 键 词： | 铁路桥梁 风屏障 防风效果 气动力系数 DEA(数据包络分析) 车辆风荷载突变效应 |
DEA-Based Evaluation of Wind Shielding Effect of Wind Barrier for Railway Bridges |
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| XIANG Huoyue
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LI Yongle
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LIAO Haili.DEA-Based Evaluation of Wind Shielding Effect of Wind Barrier for Railway Bridges[J].Journal of Southwest Jiaotong University,2012,47(4):546-550,566. |
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| Authors: | XIANG Huoyue LI Yongle LIAO Haili |
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| Affiliation: | (School of Civil Engineering,Southwest Jiaotong University,Chengdu 610031,China) |
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| Abstract: | In order to evaluate the wind shielding effect of wind barrier for railway bridges,aerodynamic coefficients of a train and two trains passing each other on a railway bridge installed wind barrier with different heights were measured by wind tunnel tests.On the basis of the test results,it was put forward that the aerodynamic coefficients of a train can be used to assess the effect of sudden change of vehicle wind load,and the magnitudes of sudden change of vehicle wind load at different tracks can be considered as the evaluation index.Moreover,the DEA(data envelopment analysis) method was adopted to evaluate the wind shielding effect of wind barrier.The research result shows that the DEA method is feasible to evaluate the wind shielding effect of wind barrier for railway bridges,and the preferable height of wind barrier is 1.72 m. |
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| Keywords: | railway bridge wind barrier wind shielding effect aerodynamic coefficient DEA(data envelopment analysis) effect of sudden change of vehicle wind load |
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