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首页> 外文期刊>Journal of Civil, Construction and Environmental Engineering >Analytical Study on Seismic Response Reduction for PC Bridge: Effects of Cost on a Proposed Seismic Reinforcement Method Due to Collision
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Analytical Study on Seismic Response Reduction for PC Bridge: Effects of Cost on a Proposed Seismic Reinforcement Method Due to Collision

机译：PC桥梁地震反应减少的分析研究：碰撞造成抗震加固法的成本效果

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After the 1995 Kobe strong earthquake, it has been greatly revised in Japanese highway bridge codes. It was secured a large gap size of the girder for the collision of girders by the Level 2 Earthquake Ground Motion of the seismic design. However, if a large gap size of the girder is adopted, the expansion joint have to be largely changed. Furthermore, the construction costs and the seismic reinforcement costs will be increased. It was considered that the gap reduction allowing the collision of girders, as a premise of preventing the collapse of the bridge, was one of the seismic reinforcement method in order to decease the construction costs and the seismic reinforcement costs. In addition, it is necessary that damage of the girder end and the pier bottom is decreased by attaching rubber shock absorber to the end of girder. In order to reduce gap size between girders, it is necessary that the resistance characteristics of the abutment due to the collision of girders and the dynamic response characteristics due to the damping at the bottom of pier are grasped. Although many studies on the collision phenomenon of bridge girders have been published, the effects of cost on seismic reinforcement allowing the collision of PC bridge girders have not been sufficiently considered yet. In this study, the resistance characteristics of the abutment due to the collision of girders and the dynamic response characteristics due to the damping at the bottom of pier will be verified by carrying out dynamic response analysis that the 3-dimensional finite element model (3D-FEM) of the PC bridge was built. In addition, the effects of cost on the proposed seismic reinforcement allowing the collision of concrete bridge girders will be considered. From the comparison of the total cost on both the current method and the proposed one, it will be confirmed that the proposed seismic reinforcement method is very effective.
机译：在1995年的科比强烈地震之后，在日本公路桥规范中大大修改。通过地震设计的2级地震地面运动，它为梁的碰撞确保了梁的大小间隙尺寸。然而，如果采用梁的大间隙尺寸，则膨胀节必须大大改变。此外，建设成本和地震增强成本将增加。据认为，差距减少允许梁的碰撞，作为防止桥梁的崩溃的前提是抗震增强方法之一，以便解除建筑成本和地震增强成本。另外，通过将橡胶减震器附接到梁的末端，必须降低梁端和墩底的损坏。为了减少梁之间的间隙尺寸，抓住了由于围绕码头底部的碰撞和由于阻尼而导致的邻接的电阻特性。虽然许多关于桥梁梁的碰撞现象的研究已发表，但仍未充分考虑了允许PC桥梁梁碰撞的地震增强件的影响。在这项研究中，通过进行三维有限元模型（3D- - 3D-）将通过执行动态响应分析（3D-）验证由于梁的碰撞和由于墩底部的阻尼而导致的校长和动态响应特性引起的电阻特性。（3D-构建了PC桥的FEM）。此外，将考虑成本对允许混凝土桥梁碰撞碰撞的建议地震钢筋的影响。从目前方法和提出的总成本的比较来看，将确认提出的地震增强方法非常有效。

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