本研究使用震動台與雙軸向層狀剪力盒進行錨碇板樁實體模型動態試驗，以探討液化土層中錨碇板樁之行為。試驗以鋁板作為錨碇板樁之主樁，以乾淨砂作為砂土試體置入雙軸向層狀剪力盒中，以由下至上傳遞之正弦波為輸入地震，擷取震動過程中砂土試體之超額孔隙水壓力與質點加速度，並量測主樁彎曲應變與側向位移，以主樁彎曲應變計算主樁承受之側向土壓、剪力、彎矩與側向彈性位移。透過資料歷時分析與繪製動態p-y曲線了解錨碇板樁土壤結構互制行為，發現液化過程中主樁周圍砂土因超額孔隙水壓力激發而出現軟化現象，試驗結束時錨碇板樁模型因砂土液化而發生傾倒破壞。試驗結果與擬靜態分析比較發現，在砂土未液化與液化狀態下，擬靜態分析之側向土壓與彎矩皆大於試驗結果，顯示擬靜態分析較為保守。

To study the anchored sheet pile responses in liquefied soil, a dynamic model test of anchored sheet pile by using shaking table and biaxial laminar shear box was performed. Sheet pile wall model fabricated with aluminum plate was embedded in saturated, clean sand inside a biaxial laminar shear box on a shaking table. Series of up-propagation sinusoid vibration were applied by shacking table. Excess pore water pressure, soil particle acceleration, lateral displacement and bending strain of sheet pile wall were measured in the dynamic test. Furthermore, the lateral earth pressure, shear force, bending moment acted on the sheet pile wall, and lateral elastic deflection of sheet pile wall were derived from bending strain. Time histories of recorded data and dynamic p-y curve were employed to discuss the soil-structure interaction of anchored sheet pile. The results revealed that the soil soften phenomenon occurred around the sheet pile wall because of the excess pore water pressure generated during the liquefaction process and the model collapsed in the end of test. Comparisons of the results between physical model test and pseudo static analysis revealed that pseudo static analysis overestimated the induced lateral earth pressure and bending moment for both liquefied and nonliquefied conditions. Consequently, pseudo static analysis for current practice was conservative.

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