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

概要

論文の詳細を見る
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.
社団法人日本建築学会の論文
2007-08-30