基于DEA的铁路桥梁风屏障防风效果评价

向活跃; 李永乐; 廖海黎

doi:10.3969/j.issn.0258-2724.2012.04.002

基于DEA的铁路桥梁风屏障防风效果评价

doi: 10.3969/j.issn.0258-2724.2012.04.002

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)

详细信息

通讯作者:
李永乐(1972-),男,教授,博士,主要研究方向为桥梁风工程及车桥耦合振动,E-mail:lele@swjtu.edu.cn

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出版历程
- 收稿日期: 2011-11-17
- 刊出日期: 2012-08-25

DEA-Based Evaluation of Wind Shielding Effect of Wind Barrier for Railway Bridges

摘要

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.
- 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
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.
- 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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参考文献(16)

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