Undergraduate Course: Mechanics of Repairing and Strengthening Structures 5 (CIVE11025)
|School||School of Engineering
||College||College of Science and Engineering
|Credit level (Normal year taken)||SCQF Level 11 (Year 5 Undergraduate)
||Availability||Available to all students
|Summary||Numerous structures require strengthening worldwide due to various reasons such as ageing, environmental attack, increase of load, change of function and design or construction errors. This module introduces the principles of repairing and strengthening various structures and relevant modern strengthening techniques. One such example is strengthening concrete and metallic structures with materials such as steel plates and advanced fibre reinforced polymer (FRP) composites. The course will focus on the fundamental behaviour and mechanics of the strengthened structures such as composite action between the strengthening material and the existing structure. Various structural design methods and practical applications will be introduced.
- Outline of the course
- Why repair and strengthening?
- Assessment of existing structures
- Strategies for structural strengthening
- Conventional vs. advanced repairing/strengthening techniques for concrete and steel structures
- Introduction to FRP materials and remarks on the history of and the prospects for FRP materials
- Example applications in construction
L3-4: FRP composites for construction
- FRP composites
- FRP materials composition and properties (fibre and matrix properties)
- Advantages and disadvantages
- Manufacturing techniques of FRP materials for civil engineering applications
L5-6: Mechanics of the unidirectional FRP lamina
- Unidirectional (UD) FRP lamina: Definitions and assumptions
- Stress vs. strain relationships for the UD FRP lamina under plane-stress state
- Derivation of the engineering constants of a UD FRP lamina
- Coefficients of thermal expansion of UD FRP lamina
- An introduction to the failure modes and failure theories of the UD FRP lamina
L7-8: FRP bond behaviour to concrete & Introduction to flexural strengthening with FRP
- Bond behaviour between the unidirectional FRP lamina and concrete and its importance
- Strengthening schemes: Externally Bonded FRP Reinforcements (EBR) and Near Surface Mounted (NSM) FRP
- Failure modes of FRP strengthened RC beams
- Test methods for the bond strength
- Behaviour and modelling of bonded joints
- Design and safety concept for flexural strengthening of RC beams and one-way slabs using EBR and NSM FRP systems
- Application examples and design example of a strengthened RC beam using EBR
L9-10: Flexural strengthening of concrete members
- Failure Modes: Ultimate Limit States (ULS)
- Flexural strength
- Debonding strength models
- Analysis of Serviceability Limit State (SLS)
- International design guidelines: Design approaches for flexural strengthening of RC beams using ERB and NSM FRP
- Design recommendations for one-way slabs and for two-way slabs
- An introduction to prestressed FRP flexural reinforcement (prestressed EBR method) for RC and steel beams
L11-12: Shear strengthening of concrete members
- Fundamental concepts in shear resistance of RC
- Need for shear strengthening and methods of shear strengthening using FRP systems
- Shear capacity of strengthened beams
- International design guidelines: Design approaches for shear strengthening of RC beams using EBR FRP
- Design example for the FRP shear strengthening of a RC member by EBR
- Design approaches for shear strengthening of RC beams using the NSM technique
- Application examples
L13-14: Punching strengthening of concrete slabs
- Punching (shear) failure mode of slabs on columns
- Conventional strengthening techniques to provide punching resistance
- Punching strengthening: Advanced techniques based on EBR, the CFRP stitch or CFRP dowel system
- Design approaches for RC slabs without and with punching reinforcement (steel studs)
- Design guideline for punching strengthening of RC flat slabs with FRP
L15-16: Strengthening of concrete columns using FRP systems
- Method of strengthening (confinement by FRP)
- Failure modes and typical behaviour
- Compressive strength (circular and rectangular columns)
- Stress-strain behaviour (best-fit and design models)
- Seismic retrofit of columns
- Fire resistance of confined columns
L17-18: Strengthening of metallic, masonry and timber structures
FRP column strengthening: A compressive strength enhancement of a slender RC column through an added reinforced concrete overlay.
Engineering constants, stiffnesses and compliances of the UD lamina.
Bond Strength for FRP plates bonded to concrete.
Flexural strengthening of a RC beam by externally bonded CFRP reinforcement: Design approaches.
Shear strengthening of RC beam: Design a strengthening scheme for a concrete beam deficient in shear.
Strengthening of RC columns with FRP confinement: Design a strengthening scheme for a concrete column.
Entry Requirements (not applicable to Visiting Students)
|| It is RECOMMENDED that students have passed
Concrete Structures 4 (CIVE10029)
||Other requirements|| None
Information for Visiting Students
|High Demand Course?
Course Delivery Information
|Academic year 2022/23, Available to all students (SV1)
|Learning and Teaching activities (Further Info)
Programme Level Learning and Teaching Hours 2,
Directed Learning and Independent Learning Hours
|Assessment (Further Info)
|Additional Information (Assessment)
||This course is assessed by 100% degree exam.
||Students will be given the opportunity to provide a mid-term evaluation and comments on this will be provided by the course lecturer.
||Hours & Minutes
|Main Exam Diet S1 (December)||2:00|
|Resit Exam Diet (August)||2:00|
| On completion of the module students should be able to
- demonstrate a general understanding of the principles of repairing and strengthening various structures,
- be able to propose, select, analyse and design appropriate strengthening schemes.
- demonstrate an in-depth understanding of the state-of-the-art of a specific strengthening related topics, including the method, mechanics, advantages and disadvantages, potential applications and future research, through individual coursework.
|The course will closely follow the following books. Other references including a large number of up-to-date research papers relevant to each topic will be given during the course.|
Teng, J.G., Chen, J.F., Smith, S.T. and Lam, L. (2002), FRP Strengthened RC Structures, John Wiley and Sons, Chichester, ISBN 0-471-48706-6, 245pp.
FIB 5.1 2001 Design Guideline for FRP Strengthening
ACI 440.2R-08: Guide for the Design and Construction of Externally Bonded FRP Systems for Strengthening Concrete Structures
|Graduate Attributes and Skills
|Keywords||Repairing and Strengthening,Structural Engineering
|Course organiser||Dr Giovanni Terrasi
Tel: (0131 6)50 5719
|Course secretary||Mr Ruben Gutierrez Martin
Tel: (0131 6)50 5690