Rehabilitation of Concrete Structures with Fiber Reinforced Polymer is a complete guide to the use of FRP in flexural, shear and axial strengthening of concrete structures. Through worked design examples, the authors guide readers through the details of usage, including anchorage systems, different materials and methods of repairing concrete structures using these techniques
Rehabilitation of Concrete Structures with Fiber Reinforced Polymer is a complete guide to the use of FRP in flexural, shear and axial strengthening of concrete structures. Through worked design examples, the authors guide readers through the details of usage, including anchorage systems, different materials and methods of repairing concrete structures using these techniques. Topics include the usage of FRP in concrete structure repair, concrete structural deterioration and rehabilitation, methods of structural rehabilitation and strengthening, a review of the design basis for FRP systems, including strengthening limits, fire endurance, and environmental considerations.
In addition, readers will find sections on the strengthening of members under flexural stress, including failure modes, design procedures, examples and anchorage detailing, and sections on shear and torsion stress, axial strengthening, the installation of FRP systems, and strengthening against extreme loads, such as earthquakes and fire, amongst other important topics.
Key Features
Presents worked design examples covering flexural, shear, and axial strengthening
Includes complete coverage of FRP in Concrete Repair
Explores the most recent guidelines (ACI440.2, 2017; AS5100.8, 2017 and Concrete society technical report no. 55, 2012)
Readership
Researchers and practitioners in Concrete and Structural Engineering
Table of Contents
1. Introduction
1.1 Need for Rehabilitation and Strengthening
1.2 Structural Degradation of Concrete Structures
1.3 Strengthening of Concrete Structures Using FRP Composites
1.3.1 Strengthening of RC Members in Flexure
1.3.2 Strengthening of RC Members in Shear
1.3.3 Confinement of Axial Members Using FRP
2. Methods of Structural Rehabilitation and Strengthening
2.1 Externally Bonded Steel Plates
2.2 External Posttensioning
2.3 Jacketing of Structural Members
2.4 Rehabilitation of Reinforcement Corrosion
2.5 Crack Injection
2.6 Selection of Appropriate Strengthening Technique
References
3. Fiber-Reinforced Polymers and Their Use in Structural Rehabilitation
3.1 Materials and Manufacturing
3.2 Wet Layup Systems
3.3 Prepreg Systems
3.4 Precured Systems
3.5 Near-Surface-Mounted FRP Systems
3.5.1 Bond Behavior
3.5.2 Modes of Failure
3.6 Prestressed FRP
3.6.1 S&P Prestressed FRP Systems
3.6.2 Carbo-Stress System (Stress Head)
References
4. Design Basis for FRP Systems
4.1 Strengthening Limits
4.2 Structural Fire Endurance
4.3 Environmental Considerations
4.3.1 Moisture—Humidity/Chemical Attack
4.3.2 Hygrothermal Aging of Epoxy Resin
4.3.3 Alkalinity
4.3.4 Thermal Effects and Freeze/Thaw Conditions
4.3.5 Ultraviolet Radiation
4.3.6 Design Recommendations
References
5. Strengthening Members in Flexure Using FRP
5.1 General
5.2 Basis of Design
5.3 Rectangular Stress Block
5.4 Failure Modes of FRP Flexurally Strengthened Members
5.4.1 Concrete Crushing
5.4.2 FRP Rupture
5.4.3 Intermediate Crack-Induced Debonding
5.4.4 End Debonding
5.4.5 Use of U-Strap Anchors to Mitigate End Debonding
5.5 Ductility of FRP-Strengthened Members
5.6 FRP Termination and Anchorage
5.7 Serviceability Considerations
5.8 Creep Rupture and Fatigue Stress Limits
5.9 Design Summary Flow Charts for Flexurally Strengthened Members
5.9.1 Flexural Strengthening Flow Chart According to AS 5100.8 (2017)
5.9.2 Flexural Strengthening Flow chart According to ACI 440.2R (2017)
5.9.3 Flexural Strengthening Flowchart According to TR 55 (2012)
5.10 Flexural Strengthening Examples
5.10.1 Flexural Strengthening of an RC T Beam According to AS 5100.5 (2017) and AS 5100.8 (2017)
5.10.2 Flexural Strengthening of a Prestressed Super-T beam According to AS 5100.5 (2017) and AS 5100.8 (2017)
5.10.3 Flexural Strengthening of an RC T-Beam According to ACI 318 (2014) and ACI 440.2R (2017)
5.10.4 Flexural Strengthening of a Prestressed Super-T Beam According to ACI 318 (2014) and ACI 440.2R (2017)
5.10.5 Flexural Strengthening of an RC T-Beam According to BS EN 1992–1-1 (24) and Technical Report No. 55 (2012)
5.10.6 Flexural Strengthening of a Prestressed Super-T Beam According to BS EN1992–1:1(24) and Technical Report No. 55 (2012)
References
Further Reading
6. Strengthening Members in Shear Using FRP
6.1 Introduction
6.2 Concept of Safety in Design
6.3 Contribution of Concrete to Shear Capacity of Prestressed Members
6.4 Contribution of Concrete to Shear Capacity of Prestressed Members
6.5 Shear Contribution of Transverse Shear Reinforcement
6.6 Design of Concrete Members Strengthened in Shear Using FRP
6.6.1 Failure Modes
6.6.2 Contribution of FRP to Shear Capacity
6.7 Design Summary Flowcharts for Shear-Strengthened Members
6.7.1 Shear-Strengthening Flow Chart According to AS5100.8 (2017)
6.7.2 Shear-Strengthening Flow Chart According to TR55 (2012)
6.8 Shear-Strengthening Examples
6.8.1 Shear Strengthening of an RC T-Beam According to AS5100.5 (2017) and AS5100.8 (2017)
6.8.2 Shear Strengthening of a Prestressed Super T-beam According to AS5100.5 (2017) and AS5100.8 (2017)
6.8.3 Shear Strengthening of an RC T-beam According to ACI Committee 318 (2014) and ACI440.2 (2017)
6.8.4 Shear Strengthening of a Prestressed Super T-beam According to ACI Committee 318 (2014) and ACI 440.2 (2017)
6.8.5 Shear Strengthening of a RC T-beam According to BS EN 1992-1-1 (24) and Technical Report No. 55
6.8.6 Shear Strengthening of a Prestressed Super T-beam According to BS EN 1992-1-1 (24) and Technical Report No. 55
References
Further Reading
7. Axial Strengthening of RC Members Using FRP
7.1 General
7.2 Confinement Under Concentric Axial Load
7.2.1 ACI and AS 5100 Models for Confined Circular Columns
7.2.2 ACI and AS 5100 Models for Confined Rectangular Columns
7.2.3 TR 55 Model for Confined Circular Columns
7.2.4 TR 55 Model for Confined Rectangular Columns
7.2.5 Confinement of Slender Columns
7.2.6 Ultimate Strength in Compression of a Short Column
7.3 Combined Axial Compression and Flexure
7.3.1 Diagram of Axial Moment Interaction for Rectangular and Circular Sections
7.3.2 Ultimate Strength in Compression of a Slender Column
7.4 Serviceability Considerations
7.5 Design Summary Flowcharts for Axially Strengthened Members
7.5.1 Axial Strengthening Flowchart According to ACI 440.2 (2017)
7.5.2 Axial Strengthening Flowchart According to AS5100.8 (2017)
7.5.3 Axial Strengthening Flowchart According to Technical Report No. 55
7.6 Axial Strengthening Examples
7.6.1 Axial Strengthening of a Circular Column According to AS5100.5 (2017) and AS5100.8 (2017)
7.6.2 Axial strengthening of a rectangular column according to AS5100.5 (2017) and AS5100.8 (2017)
7.6.3 Axial Strengthening of a Circular Column According to ACI 318 (ACI Committee 318, 2014) and ACI 440.2 (2017)
7.6.4 Axial Strengthening of a Rectangular Column According to ACI Committee 318 (2014) and ACI 440.2 (2017)
7.6.5 Axial Strengthening of a Circular Column According to BS EN 1992-1-1 (24) and Technical Report No. 55
7.6.6 Axial Strengthening of a Rectangular Column According to BS EN 1992-1-1 (24) and technical Report No. 55
References
Further Reading
8. FRP Anchorage Systems
8.1 Introduction
8.2 Anchorage Devices for FRP Reinforcement Used to Strengthen Members in Flexure
8.2.1 FRP U-jacket Anchors
8.2.2 Inclined U-jacket Orientations
8.2.3 Prestressed U-jackets
8.2.4 Metallic Anchorage Systems
8.2.5 FRP Anchors
8.2.6 p-Anchor
8.2.7 Evaluation of FRP Anchorage Systems Used to Strengthen Members in Flexure
8.3 Flexural Anchor Discussion
8.4 Mechanisms of FRP Failure in Shear Strengthening Applications
8.5 Anchorage Devices for FRP Reinforcement Used to Strengthen Members in Shear
8.5.1 Mechanically Fastened Metallic Anchors in Shear and Torsion Applications
8.5.2 Anchorage of FRP Through Concrete Embedment
8.5.3 FRP Spike Anchors in Shear Applications
8.5.4 Patch Anchors
8.5.5 Hybrid (FRP Anchors+Patch Anchors)
8.5.6 Substrate Strengthening
8.5.7 NSM Anchors
8.5.8 Evaluation of FRP Anchors Used to Strengthen Members in Shear
8.6 Shear Anchor Discussion
8.7 Further Work and Development of Design Provisions
8.8 Conclusions and Recommendations
References
Further Reading
9. Installation and Testing of FRP Systems
9.1 General
9.2 Preparation
9.2.1 Concrete Substrate
9.2.2 Concrete Flatness
9.2.3 Leveling of the Substrate
9.2.4 Environmental Conditions
9.2.5 Set Out
9.3 Application of Pultruded FRP Laminate Systems
9.4 Application of FRP Fabrics
9.5 Quality Control
9.5.1 Testing of Substrate Prior to Application of FRP
9.5.2 Adhesion and Durability
9.5.3 Visual Inspections
9.6 Repair Techniques
9.7 Cold Weather Application/Accelerated Curing
9.8 Hot Weather Application
References
Further Reading
10. Field Applications
10.1 West Gate Bridge Project
10.1.1 Modeling
10.1.2 Selection of Material
10.1.3 Detailing
10.1.4 Application and Quality Control
10.2 Strengthening of Posttensioned Slabs at White City London
10.2.1 Method of Works
10.2.2 Aspects of Construction
10.2.3 Testing and Approval
10.2.4 Summary
Acknowledgments
References
Further Reading V