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    Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/69342

    Title: 橋梁極限破壞之分析方法
    Authors: 陳重瑞;Chen,Chong-ruei
    Contributors: 土木工程學系
    Keywords: 向量式有限元素;Newmark-β直接積分法;極限狀態;橋梁;防止落橋裝置;動力分析
    Date: 2016-01-27
    Issue Date: 2016-03-17 18:23:24 (UTC+8)
    Publisher: 國立中央大學
    Abstract: 依據過去地震經驗發現橋梁常遭受嚴重之損害,而橋梁支承裝置、橋柱之損壞與落橋所造成的損失更為嚴重。因此本研究主要探討含防止落橋裝置之不同支承型式橋梁於大地震時極限狀態的反應。
    ;In the past extreme earthquake, observed from the damaged bridges, bearing failure, column failure and deck unseating caused a more serious loss.Therefore, it is full of curiosity that how large earthquake will cause a bridge to collapse and how the ultimate state will be. This study is aimed to analyze the ultimate situation of bridges with rigid bearing system and isolated bearing systemthrough numerical analysis.
    TheImplicit time integration method(Newmark-β), a new computational method is adopted in this study because the TheImplicit time integration method(Newmark-β) has the superior in managing the engineering problems with material nonlinearity, discontinuity, large deformation and arbitrary rigid body motions of deformable bodies. In the past, Compare with Central Different Method to be analysis method, there are numerical disperses when to solve the Rayleigh damping analysis. Implicit time integration method(Newmark-β) is adopted in VFIFE . Incremental formulation of the equation of motion is used to do iteration and to solve the response at next time step (i+1) including the displacement, velocity and acceleration. Furthermore, this calculation is also used to calculate the internal resultant force and the internal damping force exerted by the elements surrounding the particle.
    Thisstudy analyzes a five-span-continuous isolated bridge to investigate the extreme functions of the columns and unseating prevention devices, and predict the collapse situation of the target bridge.
    Finally,anextreme earthquake with magnitude of 7.2 occurred in Iwate County, Japan. The earthquake led to a number of landslides and path distorts and especially the collapse of MatsurubeBridge. To realize the failure mechanism of MatsurubeBridge
    Appears in Collections:[土木工程研究所] 博碩士論文

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