Strengthening of Reinforced Concrete Structures
Strengthening of Reinforced Concrete Structures
Strengthening of Reinforced Concrete Structures
This book presents a detailed study of the flexural strengthening of reinforced and prestressed concrete members using fibre reinforces polymer composite plates. It is based to a large extent on material developed or provided by the consortium which studied the technology of plate bonding to upgrade structural units using carbon fibre / polymer composite materials. The research and trial tests were undertaken as part of the ROBUST project, one of several ventures in the UK Government's DTI-LINK Structural Composites Programme.
Contents
Role of bonded fibre-reinforced composites in strengthening of structures
- Introduction
- What is 'strengthening with bonded fibre reinforced polymer composite plates?'
- The market for strengthening
- Strengthening techniques
- Advanctages and disadvatages of FRP composite plate bonding
- Client concerns when introducing new techniques
- Risk to clients when adopting FRP composite plate bonding
Review of materials and techniques for plate bonding
- Introduction
- Structural adhesive bonding
- External strengthening using steel plates
- External strengthening using composite materials
- Strengthening of reinforced concrete members in shear
- Applications of FRP strengthening
- Summary and conclusions of the literature review
Materials
- Adhesive bonded connections
- Composite materials
- Adhesive materials
- Adhesion and surface preparation
- The bonding operation
- Durability and fire
Structural strengthening of concrete beams using unstressed composite plates
Part B Field investigation
- Introduction
- Part A Laboratory tests
- General form and behaviou of loaded beams
- Geometric parameters
- Discussion
- Testing programme for 18m beam
- Observations
- Concluding remarks
Structural strengthening of concrete beams using prestressed plates
- Introduction
- Review of previous prestressing studies using composite plates
- Prestressing technique employed in the laboratory
- Results of laboratory tests for concrete beams strengthened with prestressedplates in the ROBUST programme
- - Results of field investigations of concrete beams strengthened with prestressedplates in the ROBUST programme
- Observations
- Concluding remarks
Environmental durability
- Introduction
- Environmental and service conditions
- Factors affecting joint durability
- Environmental durability of adhesive bonded joints
- Procedures for assessing environmental effects on materials and on bonded joints
- Effect of environment on the component materials used in the ROBUST system
- Influence of surface treatment and effects of environment on joints andinterfaces
- Other factors affecting service performance
Time-dependent behaviour and fatigue
- Introduction
- Time-dependent characteristics of concrete
- Time-dependent characteristics of steel
- Time-dependent characteristics of adhesives
- Time-dependent characteristics of plated beams using steel plates
- Time-dependent characteristics of FRP component materials and FRP composites
- Time-dependent characteristics of plated beams using polymer compositeplates
Part B Fatigue behaviour
- Creep tests conducted during the ROBUST project
- Introduction
- Fatigue of unplated beams
- Fatigue of adhesives
- Fatigue of FRP materials
- Fatigue of plated beams using steel plates
- Fatigue of short span plated beams using FRP plates
- Fatigue of long span 2.3m beams using FRP plates
Analytical and numerical solutions to strcutural strengthening of beams by plate bonding
- Introduction
- Classical analysis
- Finite element analysis
- Effect of adhesive material
- Prestressed 18.0m concrete beams
- Beams with unstressed plates
- Beams with stressed plates
- Concluding remarks
- References
- Bibliography
Design and specification for FRP plate bonding of beams
- Introduction
- Practical design rules and guidelines
- Application of the technique
- Materials
- Workmanship
- Quality control
- In-service inspection and maintenance