Repair and Strengthening Structures
- Introduction to Structural Repair, Rehabilitation, and Strengthening: Definitions of repair, restoration, rehabilitation, retrofit, and strengthening; need for intervention in existing structures; types of deterioration; service life and structural life-cycle concepts
- Structural Damage Diagnosis and Causes of Deterioration: Physical, mechanical, chemical, and environmental damage; design and construction deficiencies; overloading; earthquake, fire, and environmental effects; identification of root causes of deterioration
- Inspection and Assessment of Existing Structures: Inspection planning; visual inspection; condition survey; damage documentation; damage mapping; preliminary and detailed condition assessment
- Material Testing and Evaluation: Destructive and nondestructive testing; concrete strength assessment; rebound hammer and ultrasonic testing; core testing; reinforcement detection; corrosion assessment; testing and evaluation of structural steel
- Evaluation of Existing Structural Capacity and Performance: Determination of in-situ material properties and actual geometry; loading and analysis of existing structures; residual capacity; acceptance criteria; decision-making among repair, strengthening, rehabilitation, or replacement
- Damage and Repair of Reinforced Concrete Structures: Cracking, spalling, and delamination; reinforcement corrosion; honeycombing and concrete deterioration; surface preparation; principles for selection of repair methods
- Repair Materials and Technologies: Repair mortars and concretes; grouts; resins and epoxies; crack injection; shotcrete; polymeric materials; structural adhesives; compatibility of repair materials with existing substrates
- Strengthening of Reinforced Concrete Members: Principles of increasing the capacity of beams, columns, slabs, and walls; flexural, shear, and axial strengthening; section enlargement; requirements for connecting strengthening systems to existing members
- Concrete and Steel Jacketing: Principles of design and construction of concrete and steel jackets; force transfer; member preparation; post-installed reinforcement and anchors; construction detailing; advantages, limitations, and quality control
- Strengthening of Structures with FRP Systems: Types of FRP and properties of CFRP and GFRP; surface preparation; flexural and shear strengthening; column confinement; bond and anchorage; failure modes; design and construction considerations
- Repair and Strengthening of Steel Structures: Corrosion and section loss; buckling and deformation; cracks and damage in welds and connections; strengthening with additional plates and sections; repair and strengthening of connections; welding considerations in existing structures
- Seismic Evaluation and Retrofit of Existing Structures: Identification of seismic vulnerabilities; performance levels; evaluation of existing structures; enhancement of strength, stiffness, and ductility; addition of bracing and shear walls; principles for selecting retrofit strategies
- Repair and Strengthening of Foundations and Substructures: Causes of foundation damage; settlement and deformation; enhancement of bearing capacity; strengthening and enlargement of existing foundations; underpinning; local ground improvement; load transfer during strengthening operations
- Durability, Corrosion, and Structures in Aggressive Environments: Corrosion mechanisms; carbonation and chloride ingress; damage caused by water and chemicals; surface protection; corrosion control; enhancement of durability and service life of repairs
- Management of Repair and Strengthening Projects: Selection of the optimum alternative; technical-economic comparison of methods; cost estimation; planning and scheduling; operational constraints; contractor selection; HSE; quality assurance and quality control; risk management
- Comprehensive Case Study and Course Review: Assessment of an actual damaged structure; diagnosis of deterioration causes; determination of intervention level; development of repair and strengthening alternatives; technical, constructability, and economic comparison; selection of the preferred solution and student presentations