Table of Contents
Chapter 1: General
Overview
1.1 Scope
Determination of Applicable Building Codes
Provisions for Seismic Resistance
LDP
1.2 Applicability
1.3 Jurisdictions without a general existing building code
Which ACI Code Governs?
1.4 Administration and enforcement
1.5 Responsibilities
1.6 Contract documents
1.7 Maintenance and monitoring
Chapter 2: Notation and Definitions
Overview
2.1 Notation
2.2 Definitions
Chapter 3: Referenced Standards
Overview
Chapter 4: Basis For Compliance
Overview
4.1 General
4.2 Compliance method
4.3 Preliminary evaluation
Useful References for Evaluating Existing Concrete Structures
Chapter 5: Loads, Load Combinations, and Strength Reduction Factors
Overview
5.1 General
5.2 Load factors and load combinations
5.3 Strength reduction factors for repair design
5.4 Strength reduction factors for evaluation
5.5 Load combinations for structures repaired with external reinforcing systems
Chapter 6: Evaluation and Analysis
Overview
6.1 Requirements for structural evaluation
6.2 Structural assessment
Is a Structural Evaluation Always Required?
Use of Lower Bound Default Material Properties
6.3 Material properties
Useful References for Performing Evaluations of Existing Concrete Structures
6.4 Test methods to determine or confirm material properties
Unique Analysis Considerations
Example 6.1—Methods for Determining Material Properties
6.5 Structural analysis of existing structures
6.6 Structural serviceability
6.7 Structural analysis for repair design
6.8 Strength evaluation by load testing
Chapter 7: Design of Structural Repairs
Overview
7.1 General
7.2 Strength and serviceability
7.3 Behavior of repaired systems
7.4 Bond
7.5 Materials
7.6 Design and detailing considerations
Existing materials, reinforcement detailing, deterioration, and repair considerations
Prestressed members and structures
Post-installed anchors and dowels
7.7 Repair using supplemental post-tensioning
7.8 Repair using fiber-reinforced polymer (FRP) composites
7.9 Performance under fire and elevated temperatures
Strengthening with External Post-tensioning
Chapter 8: Durability
Overview
8.1 General
8.2 Cover
8.3 Cracks
8.4 Corrosion
Useful References on the Causes, Evaluation, and Repair of Reinforcement Corrosion in Concrete Structures
8.5 Surface treatments and coatings
Chapter 9: Construction
Overview
9.1 Stability and temporary shoring requirements
Shoring due to Failure of Columns During Repair
9.2 Temporary conditions
9.3 Environmental issues
Chapter 10: Quality Assurance
Overview
10.1 Inspection
10.2 Testing of repair materials
10.3 Construction observations
Chapter 11: Commentary References
Overview
Project Examples
Chapter 12: Project Example #1-Typical Parking Garage Repair
Description of Structure
Project Initiation and Objectives
Governing Building Codes
Preliminary Evaluation
Existing site conditions
Design strength of existing structure
Findings of preliminary evaluation
Compliance method and design basis code
Structural Evaluation
Existing conditions
Structural analysis for repair design
Design of Structural Repairs and Durability
Slab area 1
Slab area 2 and columns
Slab soffit repairs
Contract Documents
Construction
Quality Assurance
Project Close-out
Periodic maintenance
Record documents
Chapter 13: Project Example #2-Typical Façade Repair
Description of Structure
Project Initiation and Objectives
Governing Building Codes
Preliminary Observations and Evaluation
Observed concrete conditions
Laboratory findings
Findings
Structural Evaluation and Repair Design
Shear wall reveal strip repairs
North and south walls away from reveal strips and east and west slab and column edges
Balcony repairs
Performance under fire and elevated temperatures
Contract Documents
Construction
Quality Assurance
Project Close-out
Periodic maintenance
Record documents
Chapter 14: Project Example #3-Adaptive Reuse of Historic Depot
Description of Structure
Project Initiation and Objectives
Governing Building Codes
Preliminary Observations and Evaluation
Concrete conditions
Material evaluation findings
Summary
Structural Evaluation
Requirement for structural evaluation
Existing properties
Structural analysis
Structural analysis findings
Recommended Repair Program
Train deck rehabilitation
Column rehabilitation
Concrete repair details
Contract Documents
Construction
Quality Assurance
Project Close-out
Periodic maintenance
Record documents
Chapter 15: Project Example #4-Parking/Plaza Slab Strengthening
Description of Structure
Project Initiation and Objectives
Governing Building Codes
Preliminary Evaluation
Document review
Existing site conditions
Strength of as-built structure
Compliance method and design basis code
Structural Evaluation
Requirement for structural evaluation
Structural assessment
Structural analysis
Strengthening Concepts
Strengthening concept 1
Strengthening concept 2
Evaluation of strengthening concepts
Structural Analysis for Repair Design
Design of Structural Repairs and Durability
Contract Documents
Construction
Quality Assurance
Load Test
Test procedure
Test results
Project Close-out
Periodic maintenance
Record documents
Chapter 16: Project Example #5-Precast/Prestressed Double-Tee Repair
Description of Structure
Project Initiation and Objectives
Governing Building Codes
Preliminary Evaluation
Existing site conditions
Design strength of existing structure
Findings of preliminary evaluation
Design basis code
Structural Evaluation
Existing site conditions
Structural analysis for evaluation
Structural safety
Repair/Replacement Options
Repair/Replacement Option 1
Repair/Replacement Option 2
Repair/Replacement Option 3
Repair/Replacement Option 4
Evaluation of Repair/Replacement Options
Design of Strengthening Repairs
Structural analysis for repair design
Design of strengthening repairs
Design of Structural Repairs and Durability
Development and bond of CFRP strips
Acceptance of CFRP repairs by the authorities having jurisdiction
Durability of repairs
Aesthetics of repairs
Contract Documents
Construction
Quality Assurance
Project Close-out
Periodic maintenance
Record documents
Appendix A—Referenced Standards and Reports
Appendix B—References
Appendix C—Compliance Methods in the 2012 IEBC and the 2012 IBC
Appendix D—Provision Coverage Matrix