DYNAMIC DEFORMATION AND FAILURE CHARACTERISTICS OF ROCKFILL MATERIAL SUBJECTED TO CYCLIC SHEAR LOADING UNDER VERTICAL VIBRATION

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概要

• 論文の詳細を見る

• In recent years, strong random earthquake motions have become a matter of great interest among earthquake engineers concerned with the design earthquake of important civil engineering structures such as fill dams. The influence of a strong random earthquake on fill dams is characterized by large accelerations (body forces) in both vertical and horizontal directions.The following four kinds of experiments are conducted in order to investigate the dynamic strength and deformation characteristics of rockfill material : (1) static shear tests; (2) static shear tests with vertical vibration; (3) dynamic shear tests and (4) dynamic shear tests with vertical vibration.The following results are obtained;(1) The body force affects significantly the dynamic deformation behaviours, but only slightly the static deformation and strength.(2) If the ultimate dynamic strength is defined as the maximum shear stress by which the specimen fails in the same way by the static shear stress, the ultimate dynamic strength of a dense rockfill material becomes larger than the static strength in a range of lower sustained stress.(3) The rockfill material becomes unstable with a disturbed grain structure and a large deformation when it is subjected to the dynamic loads exceeding the yield stress ratio, (τ_s/σ_n)_y.Thus, the yield stress ratio becomes an important criterion for the dynamic stability of earth-structures, and the yield stress ratio can be obtained from the static shear test.

• 社団法人地盤工学会の論文
• 1980-12-15

著者

• 徳江 俊秀

  日本大学理工学部土木工学科

• 徳江 俊秀

  Department of Civil Engineering, College of Science & Technology, Nihon University

• 林 正夫

  Deputy Director of Civil Engineering Laboratory, Central Research Institute of Electric Power Indust

• 北原 義浩

  Foundation Engineering Section, Foundation and Earthquake Department, do.

関連論文

• 掘進時における泥水式シールド機の推力・トルクに関する一考察
• 360 上下振動下での繰返し水平せん断載荷によるロックフィル材の動的変形・破壊特性(『土質工学会論文報告集』Vol. 20,No. 4(1980年12月発行)掲載論文の概要)
• せん断3(第24回土質工学研究発表会総括および一般報告)
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