EFFECTS OF STRESS ROTATION AND CHANGES OF b-VALUES ON CROSS-ANISOTROPIC BEHAVIOR OF NATURAL, K_0-CONSOLIDATED SOFT CLAY

スポンサーリンク

概要

• 論文の詳細を見る

• A series of consolidated-undrained torsion shear tests was performed on large, hollow cylindrical specimens of undisturbed San Francisco Bay Mud to investigate the influence of stress rotation and changes in b-values on the stress-strain, pore pressure, and strength characteristics of a cross-anisotropic, natural clay. The specimens were first K_0-consolidated and then sheared along various undrained stress paths to study the clay behavior in the full range of stress rotation from 0° to 90° relative to vertical. For this cross-anisotropic clay, the test results indicate that the major principal strain increment directions in physical space do not coincide with the directions of major principal stress at failure. The deviation between these two directions varied continuously and the maximum deviation was measured at approximately 20°. The normalized, undrained shear strength decreases systematically with inclination of the major principal stress at failure, ψ, from triaxial compression with ψ=0° and b=0 to triaxial extension with ψ=90° and b=1. The effective friction angle remains constant at approx. 35° in the range of ψ from 0° to 30° after which increases gradually to almost 50° at ψ=90°. These results are unlike those obtained for a laboratory prepared deposit of kaolin, which tended to behave more like an isotropic material despite the initial K_0-consolidation. Thus, effects of aging are very important in the behavior of clays, and it may not be possible to simulate such effects with sufficient accuracy and reliability with laboratory prepared clay deposits.

• 社団法人地盤工学会の論文
• 2000-12-15

著者

• LADE POUL

  Department of Civil Engineering, School of Engineering and Applied Science, University of California

• Lade Poul

  Department Of Civil Engineering Aalborg University

• KIRKGARD MARK

  Deceased, formerly Chief Engineer, LAW

• Kirkgard Mark

  Deceased Formerly Chief Engineer Law

関連論文

• ELASTO-PLASTIC BEHAVIOR OF K_0-CONSOLIDATED CLAY IN TORSION SHEAR TESTS
• RELATIVE DENSITY EFFECTS ON UNDRAINED SAND BEHAVIOR AT HIGH PRESSURES
• Analysis and Prediction of Shear Banding under 3D Conditions in Granular Materials (IS-LYON 2003「地盤材料の変形特性」特集号)
• RELATIVE DENSITY EFFECTS ON DRAINED SAND BEHAVIOR AT HIGH PRESSURES
• EFFECTS OF STRESS ROTATION AND CHANGES OF b-VALUES ON CROSS-ANISOTROPIC BEHAVIOR OF NATURAL, K_0-CONSOLIDATED SOFT CLAY
• CHARACTERIZATION OF CROSS-ANISOTROPIC SOIL DEPOSITS FROM ISOTROPIC COMPRESSION TESTS
• APPLICATION OF FINITE ELEMENT METHOD TO PULLOUT RESISTANCE OF BURIED ANCHOR
• INSTABILITY OF GRANULAR MATERIALS AT HIGH PRESSURES
• A GENERAL FAILURE CRITERION AND STRESS-STRAIN RELATION FOR GRANULAR MATERIALS TO METALS

スポンサーリンク