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|標題:||Consolidation for Radial Drainage underTime-Dependent Loading||關鍵字:||Viscoelasticity;Clay;Radial consolidation;Time dependence;Loading rate||Project:||JOURNAL OF GEOTECHNICAL AND GEOENVIRONMENTAL ENGINEERING, Volume 139, Issue 12.||摘要:||
This paper presents the investigation of consolidation for radial drainage under linear time-dependent loading with varying loadingdependentcoefficients of radial consolidation by using a viscoelastic approach. By extending Barron’s solution for radial consolidation of smallstrain sustained constant load, the convolution integral with time as the variable was used to analyze the consolidation under time-dependentloading. Four different loading rates were applied in the consolidation tests on three types of remolded clay with various plasticity indices tostudy the behavior of radial consolidation. The variation of the coefficient of radial consolidation versus effective stress was determined byexplicitly performing falling head radial permeability tests at various loading stages in a modified consolidometer through a series of radialconsolidation tests. The aforementioned relationship was converted to the coefficient of radial consolidation with the loading time of thecorresponding pressure applied to the specimen for each specific loading rate test. The convolution integral of the viscoelastic theory was thenapplied for the prediction of consolidation settlement versus time for each loading rate test. The findings indicated that the viscoelastic settlementprediction, in terms of the average degree of radial consolidation using the loading-dependent coefficients of radial consolidation, is moreconsistent with the experimental results compared with those when assuming a constant coefficient of radial consolidation.
|Appears in Collections:||土木工程學系所|
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