| 防撞梁在超高车辆撞击铁路桥梁中的防撞性能研究 |
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| 引用本文： | 徐丹,王涛,FERNANDO Moreu.防撞梁在超高车辆撞击铁路桥梁中的防撞性能研究[J].世界地震工程,2018,34(4):136-142. |
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| 作者姓名： | 徐丹 王涛 FERNANDO Moreu |
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| 作者单位： | 1. 中国地震局工程力学研究所 地震工程与工程振动重点实验室, 黑龙江 哈尔滨 150080;2. 新墨西哥大学 土木工程系, 新墨西哥州 阿尔伯克市 87131, 美国 |
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| 摘 要： | 作为交通运输工程中不可或缺的一部分，铁路桥梁在生命线及基础设施系统中发挥着重要的作用，一旦被超高车辆撞击，将会造成难以估计的生命及财产损失。提出4个不同配置（横梁、支撑）防撞梁，作为一种缓冲机制安装于桥梁可能发生撞击的主梁底部区域，并通过1:5缩尺模型对防撞梁的防撞性能及工作原理进行研究，并提出基于数值模拟的简化分析方法，实验结果表明:4个防撞梁对于降低桥梁在冲击荷载下的动力响应均有很好效果，能够有效降低桥梁结构在冲击荷载下的动力响应，塑性变形折减至50%，变形能力较好的防撞梁防撞性能更好，此外，基于数值模拟的简化分析方法是有效的。
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| 关 键 词： | 铁路桥梁 超高车辆 撞击 防撞梁 缩尺模型 简化分析方法 |
Analysis on the anti-collision effective of crash beam on over-height vehicle VS railway bridge impact |
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| XU Dan,WANG Tao,FERNANDO Moreu.Analysis on the anti-collision effective of crash beam on over-height vehicle VS railway bridge impact[J].World Information On Earthquake Engineering,2018,34(4):136-142. |
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| Authors: | XU Dan WANG Tao FERNANDO Moreu |
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| Affiliation: | 1. Key Laboratory of Earthquake Engineering and Engineering Vibration, Institute of Engineering Mechanics, CEA, Harbin 150080, China;2. Department of Civil Engineering, University of New Mexico, Albuquerque, NM 87131, USA |
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| Abstract: | As an indispensable part of the transportation engineering, Railway Bridge plays an important role in lifeline and infrastructure system. And can cause incalculable losses when hits by over-height vehicle. This paper proposed four types crash beam, as the cushion mechanism of anti-collision, which assembled in the bottom flange of bridge girder center, where the collision may occur. A:5 scale model experiment was conducted in the Key Laboratory of Earthquake Engineering and Engineering Vibration, Institute of Engineering Mechanics, China Earthquake Administration(IEM,CEA),moreover, a simplified analysis method which based on the numerical simulation is provided. The results shows that the crash beam have a good performance in attenuating the dynamic response of the bridge under impact, and can attenuate the dynamic response of the bridge under collision such as the residual deformation was attenuated up to 50 percent,the weakness crash beam have a better dynamic attenuation. In addition, the simplified analysis method is effective. |
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| Keywords: | railway bridges over-height vehicle impact crash beam scaled model simplified method |
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