2017-08-012024-05-17https://scholars.lib.ntu.edu.tw/handle/123456789/689431摘要：樁基礎係建築、橋梁等結構物常用的深基礎型式之一。當地震發生時，樁基礎一方面會受到上部結構慣性力傳至基礎的作用力，另一方面也會受到地盤運動所施加的作用力，其行為相當複雜。基礎耐震設計一般僅考量結構物慣性力作用，然而對於軟弱地盤，因其受震時地盤變位顯著，若忽略地盤運動效應，則會低估樁基礎的地震需求。若要考量地盤運動效應，國內大多數工程結構物之耐震設計規範並無相關規定，僅鐵路橋梁耐震設計規範參考日本路橋梁耐震設計規範，針對第三類地盤規定應 考量土壤-結構互制效應，並以擬靜力分析法考量慣性力與地盤運動效應，不過該規定在實際應用上，由於相關細節如地盤變位剖面的決定與地盤運動作用力的施加方式並不清楚，要真正落實應用顯得困難。另一方面，若需要進行動力歷時分析，規範也無相關分析方法可供參考。 因此本研究將針對樁基礎耐震設計需求，發展可考量慣性力及地盤運動效應之分析方法。研究目標發展擬靜力分析法及簡易動力分析法。研究期程為二年：第一年針對利用中央大學離心機所進行之樁基礎結構離心機振動台試驗資料進行分析，以該試驗作基準，發展動力分析方法，包括簡易動力分析法及有限元素分析法，透過有限元素分析與試驗結果之比較分析，發展適用之簡易動力分析方法；第二年利用第一年所發展之動力分析模式進行參數分析，檢驗現行耐震設計規範所建議之擬靜力分析方法的適用性。<br> Abstract: Pile foundations are commonly used deep foundations for bridge and building structures. For pile foundations subjected to seismic loading, piles need to sustain the inertial force form the superstructure and the action of ground movement which is called kinematic effect. In Taiwan, except for seismic design code of railway bridges, most design codes of engineering structures only consider the inertial effect, but ignore the kinematic effect. For soft ground, if the kinematic effect is ignored, the seismic demand for the foundation might be underestimated. For considering inertial and kinematic effects in seismic design of pile foundations, it is necessary to develop appropriate analysis methods. To this end, this study aims to develop appropriate analysis methods to be used for seismic design of pile foundations considering inertial and kinematic effects. The analysis methods include pseudo static analysis and simplified dynamic analysis. We propose a two-year research project. In the first year, we will analyze the test results of the centrifuge shaking table tests of pile foundation model using the centrifuge at the National Central University. Based on the test results and finite-element based dynamic analysis results, the simplified dynamic analysis method is developed. In the second year, the dynamic analysis model is used to perform a series of parametric analyses to investigate the variation of inertial and kinematic effects with time from which the appropriateness of the pseudo static analysis method in the design code is reviewed.樁基礎慣性力效應地盤運動效應離心機模型振動台試驗耐震設計Pile foundationsInertial effectKinematic effectCentrifuge shaking table testingSeismic design.