RC beams shear-strengthened with fabric-reinforced-cementitious-matrix (FRCM) composite

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• 作者：Giovanni Loreto ; Saman Babaeidarabad…
• 关键词：FRCM ; Reinforced concrete ; Repair ; Shear ; Strengthening
• 刊名：International Journal of Advanced Structural Engineering (IJASE)
• 出版年：2015
• 出版时间：December 2015
• 年：2015
• 卷：7
• 期：4
• 页码：341-352
• 全文大小：1,396 KB
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• 作者单位：Giovanni Loreto (1)
  Saman Babaeidarabad (2)
  Lorenzo Leardini (3)
  Antonio Nanni (4)
  
  1. Department of Civil and Environmental Engineering, Georgia Institute of Technology, 790 Atlantic Drive, Room 5139d, Atlanta, GL, 30332, USA
  2. Department of Civil Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran
  3. Department of Architecture, Building Environment and Construction Engineering, Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133, Milan, Italy
  4. Department of Civil, Architectural, and Environmental Engineering, University of Miami, 1251 Memorial Drive, Room MEB 325, Coral Gables, FL, 33146, USA
  
• 刊物主题：Building Construction;
• 出版者：Springer Berlin Heidelberg
• ISSN：2008-6695

文摘

The interest in retrofit/rehabilitation of existing concrete structures has increased due to degradation and/or introduction of more stringent design requirements. Among the externally-bonded strengthening systems fiber-reinforced polymers is the most widely known technology. Despite its effectiveness as a material system, the presence of an organic binder has some drawbacks that could be addressed by using in its place a cementitious binder as in fabric-reinforced cementitious matrix (FRCM) systems. The purpose of this paper is to evaluate the behavior of reinforced concrete (RC) beams strengthened in shear with U-wraps made of FRCM. An extensive experimental program was undertaken in order to understand and characterize this composite when used as a strengthening system. The laboratory results demonstrate the technical viability of FRCM for shear strengthening of RC beams. Based on the experimental and analytical results, FRCM increases shear strength but not proportionally to the number of fabric plies installed. On the other hand, FRCM failure modes are related with a high consistency to the amount of external reinforcement applied. Design considerations based on the algorithms proposed by ACI guidelines are also provided. Keywords FRCM Reinforced concrete Repair Shear Strengthening