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首页> 外文期刊>International journal of steel structures >Interaction Analysis of Sliding Slab Track on Railway Bridge Considering Behavior of End-Supporting Anchors
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Interaction Analysis of Sliding Slab Track on Railway Bridge Considering Behavior of End-Supporting Anchors

机译：考虑端部支撑锚固特性的铁路桥梁滑动平板轨道相互作用分析

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摘要

Railway bridges with a continuously welded rails are subject to track-bridge interactions due to temperature changes and train load, which cause an additional axial force on the rail. The recently developed sliding slab track can significantly reduce the axial force on the rail caused by such interactions by placing a low frictional sliding layer between the track slab and the bridge deck and separating the longitudinal movement of the bridge from that of the track. In this study, the anchor in the fixed support region, which is an important component of the sliding slab track, was analytically evaluated to derive the load-displacement relationship, and the track-bridge interaction of the continuous bridge with the sliding slab track was analyzed considering the derived relationship. The anchor was examined for the cases of infinite stiffness, consistent stiffness, and damaged state; the stiffness of the anchor reached 10% of the original. There were no significant differences in the rail stress, track slab axial force, and rail displacement when the stiffness of the anchor was interpreted as infinite. Although the displacement of the rail increased when the anchor was damaged, there was no significant increase in the rail stress or the track slab axial force. It was confirmed, however, that the damaged anchor must be repaired as early as possible because the damage can develop rapidly as the displacement of the damaged anchor significantly increases.
机译：具有连续焊接导轨的铁路桥梁会因温度变化和列车负载而引起轨道桥相互作用，这会在导轨上产生额外的轴向力。最近开发的滑动平板轨道可通过在轨道平板和桥面板之间放置低摩擦滑动层并将桥的纵向运动与轨道的纵向运动分开来显着减小由这种相互作用引起的在轨道上的轴向力。在这项研究中，分析评估了固定支撑区域中的锚，该固定支撑区域是滑动平板轨道的重要组成部分，以得出载荷-位移关系，并且连续桥与滑动平板轨道的轨道-桥梁相互作用为：考虑派生关系进行分析。检查了锚的无限刚度，一致刚度和损坏状态的情况；锚的刚度达到原来的10％。当将锚固件的刚度解释为无限大时，轨道应力，轨道板轴向力和轨道位移没有显着差异。尽管当锚定件损坏时轨道的位移增加，但是轨道应力或轨道板轴向力没有明显增加。但是，已经确认，损坏的锚固件必须尽早修复，因为随着损坏的锚固件的位移显着增加，损坏会迅速发展。

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