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題名 | 液化流動壓作用下基樁耐震性能之側推分析=A Pushover Analysis for the Lateral Pile Subjected to Liquefaction-Induced Flow Earth Pressure |
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作者姓名(中文) | 鐘明劍; 黃俊鴻; 呂昱達; | 書刊名 | 中國土木水利工程學刊 |
卷期 | 19:4 2007.12[民96.12] |
頁次 | 頁515-527 |
分類號 | 441.17 |
關鍵詞 | 側推分析; 液化; 流動壓; 基樁; 性能設計; Pushover analysis; Liquefaction; Flow pressure; Pile; Performance-based design; |
語文 | 中文(Chinese) |
中文摘要 | 本文提出一套非線性靜力側推程序,應用於分析地盤液化流動壓力或位移作用下基樁之非線性側向承載行為,分析不同液化程度下基樁之側向承載性能狀態,供基樁耐震性能設計之用。分析軟體採SAP2000,分析時基樁以三線性彎矩-曲率關係模擬構材非線性行為,樁-土互制作用則以完全彈塑性之非線性土壤彈簧模擬。文中分別以流動土壓與流動變位兩種加載模式進行現地損害案例的分析比較,探討於液化流動地盤之受力與變形行為,惟流動土壓分析模式可較簡單地應用於性能設計法。文末以流動土壓分析模式為基礎,提出基樁抵抗液化流動之耐震性能分析流程,供工程界參考應用。 |
英文摘要 | This paper presents a simplified nonlinear pushover analysis for the lateral response of the pile subjected to liquefaction-induced flow earth pressure. The pushover analysis can be carried out by incrementally imposing flow pressure or flow displacement on the nonlinear pile. The capacity curve of the lateral pile was expressed in terms of the total flow force and the displacement of pile top, thus, seismic performances corresponding to different liquefaction extents can be clearly identified on the curve. Using SAP2000 software, the non-linear pile was modeled by a tri-linear moment-curvature relationship and the soil-pile interaction was simulated by an elastic-perfectly plastic spring. On well-documented field damage case was analyzed by both the flow pressure and displacement methods and comparisons were made between the results of these two methods. It shows that both two methods can reasonably capture the lateral pile response when subjected the flow pressure due to ground liquefaction, however, the flow pressure method seems more suitable to be used in the area of seismic performance-based design of pile foundation. |
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