| 32m双线简支箱梁在对开列车作用下梁体竖向动力响应规律研究 |
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| 引用本文： | 蔡超勋,胡所亭,柯在田,牛斌. 32m双线简支箱梁在对开列车作用下梁体竖向动力响应规律研究[J]. 钢结构, 2013, 28(6): 18-22 |
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| 作者姓名： | 蔡超勋 胡所亭 柯在田 牛斌 |
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| 作者单位： | 中国铁道科学研究院铁道建筑研究所,北京,100081 |
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| 摘 要： | 将列车、双线简支箱梁分别简化为二系悬挂多刚体体系和模态函数,推导车桥系统动力方程,建立并验证车桥相互作用模型,对双线简支箱梁在对开列车作用下梁体竖向动力响应规律进行研究。研究表明:对开列车作用下,桥梁动力响应与列车运行速度及入桥距离差密切相关;列车以共同速度对开时,可引起的梁体最大挠度动力系数与单线行车作用下基本一致,但梁体动力响应值约为单线行车引起的梁体动力响应值的2倍。
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| 关 键 词： | 车桥系统 双线对开 车桥相互作用 动力系数 |
THE LAW STUDY ON BRIDGE VERTICAL DYNAMIC RESPONSE OF 32 METER TWO-LANE SIMPLY SUPPORTED BOX GIRDER UNDER OFF THE TRAINS |
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| Cai Chaoxun , Hu Suoting , Ke Zaitian , Niu Bin. THE LAW STUDY ON BRIDGE VERTICAL DYNAMIC RESPONSE OF 32 METER TWO-LANE SIMPLY SUPPORTED BOX GIRDER UNDER OFF THE TRAINS[J]. Steel Construction, 2013, 28(6): 18-22 |
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| Authors: | Cai Chaoxun Hu Suoting Ke Zaitian Niu Bin |
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| Affiliation: | Cai Chaoxun Hu Suoting Ke Zaitian Niu Bin ( Railway Engineering Research Institute , China Academy of Railway Sciences , Beijing 100081 , China ) |
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| Abstract: | The trains , two-lane simply supported box girder are reduced to the secondary suspension systems of many-rigid-bodies and modal function , then the dynamic equation of vehicle-bridge system is derived and the vehicle-bridge interaction model is built and tested.The law of vertical dynamic response of two-lane simply supported beam under off the train has been studied.The studies show that that the bridge dynamic response under two-lane off the train is closely related to operation speed and distance difference of entering into the bridge.The maximum deflection dynarnic factor incurred by two-lane train in the same speed is equal to that under the single train , but which doubled the value of the beam dynamic response. |
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| Keywords: | vehicle bridge system two-lane off the train vehicle-bridge interaction dynamic factor |
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