本研究主要探討地下維生管線在考慮地下管線與周圍土壤發生滑動情形下之受震分析。研究首先以解析方式建立單一管線之等效力-彈簧系統關係，進而延伸推求連續管線含接頭之正解分析模式。建構之非線性等效力-彈簧系統，可據以建立地表土壤與管體滑動後之地表位移-管體變形增額矩陣關係式，以便執行非線性效應下之擬動態分析，研究並以一假想之地表位移函數作用下之管線分析為例，分析結果顯示，地下管線在管體與周圍土壤發生滑動後，將產生類似隔震效應之外力隔絕現象，因而對管線產生保護作用，並不會因大量地表位移的強制束縛產生管體或接頭的大幅變形。

The main objective of this research is to analyze underground piping systems under seismic excitation. An equivalent force-spring model is first developed for a underground pipe element considering slippage between the pipe element and the surroundings soil. The developed model is further used to construct an equivalent discrete force-spring model for an infinitely extended continuous piping system. An example problem based on an artificially generated ground deformation is used to illustrate the developed analytical procedure, and the system response behavior under the pipe-soil slippage effects. Analytical results show that the slippage between the pipeline and surroundings soil provides an excitation isolation mechanism. For this reason, both the joint deformation and pipe strain deformation are significantly relieved as compared to the non-slippage linear case.

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