Rationalization of reinforcing arrangement design based on stress transfer mechanism of RC footing beams with single layer reinforcement for residential houses

Research Project

Project/Area Number	22560558
Research Category	Grant-in-Aid for Scientific Research (C)
Allocation Type	Single-year Grants
Section	一般
Research Field	Building structures/materials
Research Institution	University of Fukui
Principal Investigator	KOBAYASHI Katsumi 福井大学, 大学院・工学研究科, 教授 (40150297)
Project Period (FY)	2010 – 2012
Project Status	Completed (Fiscal Year 2012)
Budget Amount *help	¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000) Fiscal Year 2012: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000) Fiscal Year 2011: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000) Fiscal Year 2010: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Keywords	住宅用基礎 / シングル配筋 / 応力伝達機構 / 配筋設計 / 建築構造・材料
Research Abstract	The stress transfer mechanism of footing beams with single layer reinforcement for residential houses was investigated and a reinforcing arrangement method was proposed to prevent the bond splitting failure on the top side and to increase the deformation capacity. It was verified by the experiments. For the notched part of the footing beam for the maintenance opening, an analytical model was proposed to calculate the amount of reinforcement around the opening. The reinforcing arrangement method around the web-opening of normal RC beams is supposed to be applicable to that of the beams with single layer reinforcement. The footing beam of residential house does not continue around the entrance. Pre-assembled reinforcement unit was confirmed to be well usable to the substitute beam. The result of this research work will hopefully contribute to the upgrade of seismic safety design of residential house that is a basic unit of the social infrastructure.