超高強度コンクリート部材の平滑なひび割れ面におけるせん断伝達メカニズム

元データ 2007-08-30 社団法人日本建築学会

概要

Ultra-high-strength concrete more than 100 N/mm^2 has been required for reinforced concrete (RC) columns in the lower layer of super high-rise condominiums. The configuration of a crack in such a high-strength concrete is much smoother than that in normal-strength concrete. This smooth crack surface may lead different mechanical behaviors of RC members. The tests were performed on RC member with compressive strength of 125 N/mm^2 to study the influence of the configuration of cracks and the arrangement of shear reinforcement upon the shear behaviors of RC members. The meaningful relation between shear reinforcements and shear crack behaviors has been proven by measuring the width and sliding of cracks. The FEM analyses have been also carried out to investigate the shear transfer mechanism in smooth cracks by using smeared crack models with shear retention factors and discrete crack models with different aggregate sizes.

著者

林 静雄 東京工業大学
篠原 保二 東京工業大学建築物理研究センター
林 靜雄 東京工業大学
林 静雄 東京工業大学 セキュアマテリアル研究センター
齊藤 弘幸 東京工業大学:(現)大林組
篠原 保二 東京工業大学
齊藤 弘幸 東京工業大学大学院総合理工学研究科環境理工学創造専攻

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