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首页> 外文期刊>Structural engineering earthquake engineering >SEISMIC PERFORMANCE OF SLIDING ISOLATION BEARINGS DURING VERTICAL MOVEMENT OF BRIDGE GIRDERS
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SEISMIC PERFORMANCE OF SLIDING ISOLATION BEARINGS DURING VERTICAL MOVEMENT OF BRIDGE GIRDERS

机译：桥梁垂直移动时滑动隔震轴承的抗震性能。

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摘要

The behavior of sliding isolation bearings with respect to vertical movement due to earthquake excitation is investigated through experiments and simulations. Bridge girders may undergo vertical motion during severe earthquake events, and since the friction damping provided by sliding isolation bearings is dependent on maintaining contact between the bearing and the girder, there remains an issue as to whether sliding isolation bearings are appropriate for this application. It was shown in this study that multi-layer rubber horizontal load distribution (HLD) devices with steel plate reinforcement are essential for bridge applications, as non-reinforced HLD devices are likely to fail under severe vertical tensile loads. The bearing surface, however, is found to be resilient to impact with an uplifted girder, and simulations demonstrate that contact is maintained with at least one bearing during severe ground motion due to lateral rocking of the girder. The results therefore suggest that appropriately designed sliding isolation bearings are suitable for bridge applications.
机译：通过实验和仿真研究了滑动隔振轴承相对于地震激励引起的垂直运动的行为。桥梁梁在严重地震事件中可能会发生垂直运动，并且由于滑动隔离轴承提供的摩擦阻尼取决于保持轴承与梁之间的接触，因此仍然存在关于滑动隔离轴承是否适合此应用的问题。这项研究表明，带有钢板加固的多层橡胶水平载荷分布（HLD）装置对于桥梁应用至关重要，因为非加固HLD装置可能会在严重的垂直拉伸载荷下失效。然而，发现轴承表面具有弹性，可以抵抗抬起的大梁，并且模拟表明，由于大梁的横向摇摆，在剧烈的地面运动期间，至少一个轴承保持了接触。因此，结果表明适当设计的滑动隔离轴承适用于桥梁应用。

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