【摘要】 建议以间接分析法将完整之土壤和桥墩基础拆解成个别之子结构系统,并依叠加概念分别诠释不同子结构行为模式,最后加总各系统行为以仿真整体结构反应。研究首先利用集中质块分析法建立自由场受震之位移,并以此为前置解代入桩基础波动方程分析,求解基桩受震反应。上部桥梁结构则简化为双自由度质块系统纳入分析,以上部结构和地下桩基础间之传递力为收敛依据,逐次修正系统变形量,并仿真隔震设施功效。该项分析经与有限元素法结果比较证明可行,且可节省大量分析时间。更多还原

【Abstract】 This study represented a simplified analysis for the bridge pier foundation system.The structural system was decomposed into substructures where the corresponding individual responses were solved and integrated to obtain the results.To obtain the solution,the seismic free-field response of the site was computed from the lumped-mass analysis,and the soil deformations were then imposed onto the foundation to conduct the wave equation analysis.The superstructure was modeled as a two DOF systems as mounted in the surface of the foundation,and due isolations of the structure was simulated.The transmitting forces between the structure and the foundation were iteratively checked until the equilibrium of the system was ensured.The solutions were verified with the FEM analysis.Substantial amount of computation time could be reduced.更多还原