離心模型試驗技術在土壤液化行為之模擬與驗證的國際合作計畫;International Collaborative Research for Soil Liquefaction Simulation by Centrifuge Modeling Technique

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題名:	離心模型試驗技術在土壤液化行為之模擬與驗證的國際合作計畫;International Collaborative Research for Soil Liquefaction Simulation by Centrifuge Modeling Technique
作者:	洪汶宜
貢獻者:	國立中央大學土木工程學系
日期:	2018-12-19
上傳時間:	2018-12-20 10:56:50 (UTC+8)
出版者:	科技部
摘要:	本計畫藉由離心振動台試驗進行三年之研究，依據 Liquefaction Experiments and Analysis Projects (LEAP)國際合作計畫的執行內容進行相對應之研究內容，將進行高品質的土壤液化與側向滑移標竿試驗。第一年將進行5 度緩坡飽和砂層，因受振而導致土壤液化引致土壤側潰之離心模型試驗，透過多種模型設置如埋設色砂層與垂直埋設麵條觀察土壤位移情況、利用物理模型用之CPT 試驗比較液化前後之土壤性質與埋設加速度計、孔隙水壓計與位移記探討等探討純砂層因液化導致土壤側潰之特性；第二年則將在5 度緩坡飽和砂層中探討不同組成構造之土層其液化引致側潰之結果，其物理模型間之關聯性，並與第一年之試驗比較以模擬於現在不同沉積環境形成之地盤，及其液化與側潰之機制。第三年則將在5 度緩坡飽和砂層製作不同傾向之離心模型，探討在振動方向相同的情況下，不同傾向之緩坡模型其液化引致側潰之結果，與其物理模型間之關聯性。三年之試驗結果將與LEAP 國際合作計畫之數值模型模擬單位作相互驗證，用以了解離心物理模型與數值模型對大地工程問題之差異並進行校正，期望透過此計畫為基礎在未來建物理模型與數值模型之模擬與分析，以精確掌握與模擬各種大地工程之問題。 ;The new Liquefaction Experiments and Analysis Projects (LEAP) will have three main projects and each of these projects target at least one important aspect of liquefaction and its consequences. In the first year, the focus is on the effect of uncertainties on lateral spreading of liquefiable soils. The effects of uncertainties in soil properties (caused by specimen preparation and nature of granular materials) and in the base excitations achieved on various centrifuge platforms will be thoroughly investigated through extensive experimental research and numerical simulations. The second year, focuses on the effect of soil fabric on soil liquefaction. The effect of depositional environment has been observed to have profound effects on the response of liquefiable soils which have been manifested in many recent earthquakes such as the 2011 Christchurch earthquakes. The third year project aims at the response of geo-structures containing liquefiable soils to different shaking direction. This project will allow us to gain insight on the behavior of liquefiable soils in more realistic seismic shaking environment and will probe the capabilities of constitutive models and numerical modeling techniques beyond the traditional plane strain conditions. The main goals of this project is to produce validation quality experimental data, at both the element and centrifuge specimen levels, that can be used for calibration, verification, and validation of leading constitutive and numerical modeling techniques that are currently available for the analysis of earthquake-induced liquefaction and its consequences on geotechnical systems.
關聯:	財團法人國家實驗研究院科技政策研究與資訊中心
顯示於類別:	[土木工程學系 ] 研究計畫

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