Analytical Study on Reinforcing Effects of Steel Fiber for Ultra High Strength RC Members

2014 Fiscal Year Final Research Report

• Project/Area Number: 24560678
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Building structures/materials
• Research Institution: Shizuoka Institute of Science and Technology (2014); Kogakuin University (2012-2013)
• Principal Investigator: NOGUCHI HIROSHI 静岡理工科大学, その他部局等, 教授 (20107535)
• Co-Investigator(Kenkyū-buntansha): IZUMI Nobuyuki 千葉大学, 大学院工学研究科, 教授 (80526773) ; KASHIWAZAKI Takashi 千葉大学, 大学院工学研究科, 助教 (40251178)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: 鉄筋コンクリート / 超高強度コンクリート / 鋼繊維 / FEM解析 / ひび割れ分散効果 / せん断終局強度

Outline of Final Research Achievements

New construction methods using steel fibers have been developed in order to decrease lateral reinforcement which can add compressive ductility to ultra high strength reinforced concrete. Previous experimental research results on column members indicated that crack dispersion and necessary strength were secured by mixing one percent steel fiber. The steel fiber reinforcement has an effect of crack dispersion which is caused by improvement of tensile strength and plastic capacity of concrete. But there is a limitation of solution for the effect of crack dispersion by the experimental research. In this study, the FEM inelastic analytical models of reinforcement, steel fiber, concrete and bond of reinforcement were developed. The mechanisms of strength increase of ultra high strength reinforced concrete structures were clarified by the consideration of the reinforcement effects of the steel fiber by the concepts of energy absorption.

Free Research Field

建築構造学、耐震工学、鉄筋コンクリート構造