一定荷重および不規則荷重による乾燥砂の繰り返し単純セン断特性

概要

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The authors have reported formerly some results of the repetitional simple shear test in the range of large shearing strain γ_a > 1%. It was conducted under some given strains. Herein. some experimental results conducted under given uniform load and non-uniform load are shown.The experiment was conducted in three kind of relative densities (Loose state:D_r = 60%, Dense state: D_r = 80%). and the air dry TOYOURA uniform sand was used. The shearing test are consist of three cases. such as : 1) Single direction shearing, 2) Repelitional shearing under the uniform load, 3) Repetitional shearing under the non-uniform load. The load are in the range of 50 ～ 90 % of the maximum shear stress.The following results are obtained : 1) The shearing strength after repetitional test was affected by the change of density during test, and also affected by the confining pressures. 2) Internal friction angle φ is determined by the void ratio e and the interparticle friction angle φ_μ. 3) the relationship between equivalent hysteretic damping h and shearing modulus G are approximately linear. The relationships have respect to the interparticle friction angle of sand.
琉球大学工学部の論文