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発表 Application of Equivalent Fracture Energy for Concrete Elements With Sand Cushion for Three Dimensional Elasto-Plastic Impact Response Analysis of Prototype RC Girder

作成年度 2007年度
論文名 Application of Equivalent Fracture Energy for Concrete Elements With Sand Cushion for Three Dimensional Elasto-Plastic Impact Response Analysis of Prototype RC Girder
論文名(和訳)
論文副題
発表会 平成19年度 年次技術研究発表会
誌名(No./号数) 平成19年度 土木学会北海道支部 論文報告集 第64号
発表年月日 2008/01/30 ~ 2008/01/31
所属研究室/機関名 著者名(英名)
室蘭工業大学Abdul Qadir Bhatti(Abdul Qadir Bhatti)
室蘭工業大学岸 徳光(KISHI Norimitsu)
寒地構造チーム今野 久志(KONNO Hisashi)
抄録
The goal of this paper is the development of an objectivity algorithm for tensile failure of concrete elements based on the smeared cracking formulation for RC Girder with sand cushion. The algorithm has been implemented into LS-DYNA for hexahedron solid elements and correctly accounts for crack directionality effects. Thus enabling the control of energy dissipation will be associated with each failure mode regardless of mesh refinement.[*]The advantage of the proposed technique is that mesh size sensitivity on failure is removed leading to results、 which converge to a unique solution for girder with sand cushion、 as the mesh is refined. The proposed algorithm has been validated by a full-scale prototype test with sand cushion using different cases of mesh refinement.[*]Here、 in order to establish a modification method for material properties of concrete so as to rationally analyze using coarse mesh、 an equivalent fracture energy concept for concrete element with sand cushion is proposed and the applicability was conducted comparing numerical analysis results and experimental results.
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