GUIDELINES FOR RETROFIT OF CONCRETE STRUCTURES

― DRAFT ―

CONTENTS

CHAPTER 1: GENERAL PROVISIONS
1.1 Scope	203
1.2 Definitions	204
CHAPTER 2: FUNDAMENTALS OF RETROFIT
2.1 General	206
2.2 Flow of Retrofitting Process	207
2.3 Changes over Time in Performance of Retrofitted Structures	210
CHAPTER 3: MATERIALS
3.1 General	211
3.2 Materials in Existing Structures	211
3.3 Quality of Materials	212
3.3.1 External Cables	212
3.3.2 Steel Plates	214
3.3.3 Continuous Fiber Sheets	214
3.3.4 Adhesive	214
3.3.5 Fill Material	215
3.3.6 Cement-Based Reinforcing Material	215
3.3.7 Steel	217
3.4 Material Characteristic Values and Design Values	217
3.4.1 External Cables	217
3.4.2 Steel Plates	218
3.4.3 Continuous Fiber Sheets	218
3.4.4 Cement-Based Reinforcing Materials	220
3.4.5 Steel	221
CHAPTER 4: LOADS AND ENVIRONMENTAL ACTIONS	221
CHAPTER 5: INSPECTION OF EXISTING STRUCTURES
5.1 General	223
5.2 Inspection Method	223
CHAPTER 6: PERFORMANCE VERIFICATION FOR EXISTING STRUCTURES	226
CHAPTER 7: SELECTION OF RETROFITTING METHOD	228
CHAPTER 8: CONSIDERATIONS IN RETROFITTING DESIGN AND CONSTRUCTION	233
CHAPTER 9: PERFORMANCE VERIFICATION FOR RETROFITTED STRUCTURES
9.1 General	233
9.2 Verification of Safety	233
9.2.1 Flexural and Axial Load-Carrying Capacity	233
9.2.2 Shear Capacity of Bar Members	237
9.2.3 Punching Shear Capacity of Surface Members	240
9.2.4 Flexural Fatigue Capacity	240
9.2.5 Shear Fatigue Capacity of Bar Members	241
9.2.6 Punching Shear Fatigue Capacity of Surface Members	241
9.2.7 External Cable Fretting Fatigue Capacity	242
9.2.8 Ultimate Deformation	242
9.3 Verification of Serviceability	243
9.3.1 Stress Level	243
9.3.2 Crack Width	244
9.3.3 Displacement and Deformation	245
9.4 Verification of Restorability	246
9.4.1 Deformation	246
9.4.2 Stress Level	248
References	249