Strengthening of RC Members Using Near-Surface Mounted FRP Composites: Design Overview

Strengthening of reinforced and prestressed concrete (RC and PC) members using externally bonded FRP laminates is today a well-accepted technology that is becoming popular among designers and contractors. Near-surface mounted (NSM) FRP reinforcement represents an alternative way to improve flexural and shear performance of concrete structures. In some instance, it is the only suitable technology that can be efficiently applied, for example, when upgrading beam-column joints or for flexural strengthening of compression members. In this paper, bond related issues, flexural and shear design recommendations, and design examples are presented. The paper is an attempt to provide designers with a comprehensive protocol for the rational implementation of NSM technology.

[1]  S. Rizkalla,et al.  INVESTIGATION OF BOND IN CONCRETE STRUCTURES STRENGTHENED WITH NEAR SURFACE MOUNTED CARBON FIBER REINFORCED POLYMER STRIPS , 2003 .

[2]  Antonio Nanni,et al.  Bond between Near-Surface Mounted Fiber-Reinforced Polymer Rods and Concrete in Structural Strengthening , 2002 .

[3]  A. Nanni.  Guide for the Design and Construction of Concrete Reinforced with FRP Bars (ACI 440.1R-03) , 2005 .

[4]  James G. MacGregor,et al.  Reinforced Concrete: Mechanics and Design , 1996 .

[5]  Albino J.P. Da Cunha,et al.  Strengthening of reinforced concrete beams , 1989 .

[6]  Antonio Nanni,et al.  Characterization of FRP Rods as Near-Surface Mounted Reinforcement , 2001 .

[7]  S. W. Garrity.  RETRO-REINFORCEMENT - A PROPOSED REPAIR SYSTEM FOR MASONRY ARCH BRIDGES , 1995 .

[8]  Antonio Nanni,et al.  OVERVIEW OF TESTING TO FAILURE PROGRAM OF A HIGHWAY BRIDGE STRENGTHENED WITH FRP COMPOSITES , 2000 .

[9]  Antonio Nanni,et al.  UPGRADING THE TRANSPORTATION INFRASTRUCTURE : SOLID RC DECKS STRENGTHENED WITH FRP , 2000 .

[10]  Antonio Nanni,et al.  CD-ROM Shear Strengthening of Masonry Walls with FRP Composites , 2002 .

[11]  Antonio Nanni,et al.  Upgrading Missouri Transportation Infrastructure: Solid Reinforced-Concrete Decks Strengthened with Fiber-Reinforced Polymer Systems , 2000 .

[12]  Stephanie L. Walkup,et al.  Guide for the Design and Construction of Externally Bonded FRP Systems for Strengthening Concrete Structures (ACI 440.2R-02) , 2005 .

[13]  Antonio Nanni,et al.  Shear Strengthening of Reinforced Concrete Beams with Near-Surface Mounted Fiber-Reinforced Polymer Rods , 2001 .

[14]  R. C. Cornforth,et al.  Myriad Convention Center Floor System Reinforcement , 1999 .

[15]  Clyde E. Kesler,et al.  Behavior of Concrete Columns Reinforced with High Strength Steels , 1964 .

[16]  S. O. Asplund.  Strengthening Bridge Slabs with Grouted Reinforcement , 1949 .

[17]  Timothy Ibell,et al.  Shear strengthening of existing concrete bridges , 2003 .

[18]  Edward Cohen,et al.  Guide for Ultimate Strength Design of Reinforced Concrete , 1956 .

[19]  A. Nanni,et al.  Contribution of Externally Bonded FRP to Shear Capacity of RC Flexural Members , 1998 .

[20]  Antonio Nanni,et al.  STRENGTHENING OF A BRIDGE USING TWO FRP TECHNOLOGIES. IN: FIELD APPLICATIONS OF FRP REINFORCEMENT: CASE STUDIES , 2003 .