ANISOTROPY AND ITS RELATION TO LIQUEFACTION RESISTANCE OF GRANULAR MATERIAL

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概要

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• This research establishes quantitative relationships between soil's anisotropy and liquefaction resistance for granular materials. Uniform medium density (D_r=50%) sand specimens were prepared using three different sample preparation techniques (air pluviated (AP), moist tamped (MT), and moist vibrated (MV) to create different initial soil fabrics. Undrained cyclic triaxial tests were then performed to determine the liquefaction resistance of each soil specimen. On the same specimens in the triaxial cell, vertical and horizontal compression wave velocities and vertical shear wave velocity (V_s) were measured using piezoelectric bender elements. Anisotropic (transversely isotropic) elastic constants of the soil specimens were determined from the elastic wave measurements and additional consolidation test data. With the aid of additional data from earlier discrete element model (DEM) simulations, anisotropic parameters, which influence the liquefaction resistance, were examine. It was found that when liquefaction resistance is divided by G_<12>/(E_1/E_2)^3, by G_<average>/(E_1/E_2)^3, or by V^<5.0>_s, liquefaction resistance curves converge to a unique curve regardless of the sample preparation techniques. Liquefaction Stress Ratio Reduction Factor (LSRRF) was introduced to estimate the reduction of liquefaction cyclic stress ratio of an anisotropic specimen from the isotropic specimen as simple functions of (E_1/E_2)^<-5.0> or (V_s/V_<s(iso.)>)^<5.0>.

• 社団法人地盤工学会の論文
• 2003-10-15

著者

• 石橋 勲

  Department Of Civil And Environmental Engineering Old Dominion University

• CAPAR OMER

  Zonguldak Karaelmas University, Department of Civil Engineering

• Capar Omer

  Zonguldak Karaelmas University Department Of Civil Engineering

関連論文

• ANISOTROPY AND ITS RELATION TO LIQUEFACTION RESISTANCE OF GRANULAR MATERIAL
• ANISOTROPIC BEHAVIOR OF OTTAWA SAND IN COMPARISON WITH GLASS SPHERES
• DYNAMIC SHEAR MODULUS AND EVOLUTION OF FABRIC OF GRANULAR MATERIALS
• THE EFFECTS OF SOIL PARAMETERS ON PORE-PRESSURE-RISE AND LIQUEFACTION PREDICTION
• DYNAMIC EARTH PRESSURES WITH DIFFERENT WALL MOVEMENT MODES

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