FEM ANALYSIS ON FLEXURAL AND SHEAR REINFORCING EFFECT OF RC BEAM REPAIRED BY UHPFRC WITH CFRP ROD EMBEDDED

DOI Web Site 2 References
  • LI Haotian
    KUMAMOTO UNIVERSITY, Graduate School of Science and Technology（2-39-1, Kurokami, Chuo-ku, Kumamoto-shi, Kumamoto 860-8555, Japan）
  • SATOH Ayumi
    KUMAMOTO UNIVERSITY, Faculty of Advanced Science and Technology（2-39-1, Kurokami, Chuo-ku, Kumamoto-shi, Kumamoto 860-8555, Japan）
  • MURAKAMI Kiyoshi
    KUMAMOTO UNIVERSITY, Faculty of Advanced Science and Technology（2-39-1, Kurokami, Chuo-ku, Kumamoto-shi, Kumamoto 860-8555, Japan）
  • YAMAUCHI Seiichiro
    MITSUBISHI CHEMICAL INFRATEC Co., Ltd. Waterproofing & Strengthening Department（1-1 Marunouchi 1-chome, Chiyoda-ku, Tokyo 100-8251, Japan）

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Other Title
  • CFRPロッド埋設UHPFRC断面修復によるRC梁の曲げおよびせん断補強に関するFEM解析

Abstract

<p>To develop a new post-reinforcing method, the authors study RC beam repaired by UHPFRC with an embedded CFRP rod. The CFRP rod was used for flexural reinforcement and UHPFRC was for both flexural and shear reinforcement. Therefore, the effects of flexural and shear reinforcement of the RC beam were the main foci of the study. In this study, FEM analysis was made focusing on the process of bond splitting failure and cracking to reveal the cause of the experimental results. As a result, the following conclusions were derived. 1） The FEM result obtained by incorporating the bond-slip model of the CFRP rod showed a good agreement with the experimental load-displacement relationship, 2） The bond-slip models of the CFRP rod significantly affected the load capacity of the RC beam, 3） Experimental and FEM results indicated that the horizontal shear failure of the CFRP rods occurred after the bond splitting failure of the one.</p>

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