割裂ひび割れ位置を考慮したL形RC部材接合部の耐力算定法
本研究では，ハンチを有するL形RC部材接合部の割裂ひび割れが接合部の部材中心よりも内側に生じることを実験および解析により確認し，割裂ひび割れ位置が接合部耐力に及ぼす影響を考慮した接合部耐力算定法を構築した。接合部破壊が生じる既往のL形RC部材の実験結果を対象に本手法の妥当性を評価した結果，ハンチの有無に関わらず本手法は接合部耐力を変動係数8.0%で予測することが可能であった。これより，本手法がハンチの有無に関わらず適用可能であることが確認された。
キーワード：L形RC部材接合部，隅角部，接合部耐力，割裂ひび割れ
＊１ 技術センター 社会基盤技術研究部 先端基盤研究室
＊２ 技術センター 社会基盤技術研究部 材工研究室
Method for Calculating the Bearing Capacity of L-shaped RC Member Joints While Considering the Locations of Splitting Cracks
In this study, we experimentally and analytically confirmed that split cracks develop in L-shaped RC member joints with haunches at locations within the centers of the joint sections. Subsequently, we established a method for calculating the bearing capacity of joint sections while taking into consideration the influence of the splitting crack locations on the bearing capacity. As a result of evaluating the validity of the method against the experimental results of existing L-shaped RC members that underwent joint fracture, it was found that the bearing capacity of the joint sections can be predicted with a coefficient of variation 8.0 regardless of the presence or absence of haunches. Accordingly, it was confirmed that the method can be applied regardless of the presence or absence of haunches.
Keywords: L-shaped RC member joint, corner section, joint section bearing capacity, split crack
*1 Taisei Advanced Center of Technology, Infrastructure Technology Research Department, Advanced Infrastructure Technology Research Section
*2 Taisei Advanced Center of Technology, Infrastructure Technology Research Department, Structure and Material Research Section