This code provides retrofit and rehabilitation criteria for reinforced concrete buildings based on results from the most recent research on the seismic performance of existing concrete buildings. The intent of this code is to provide provisions related to concrete material and concrete members, including material testing criteria, modeling parameters, and acceptance criteria for use within the ASCE 41 framework, similar to how the National Earthquake Hazards Reduction Program (NEHRP) Recommended Seismic Provisions produced by the Federal Emergency Management Agency (FEMA) (FEMA 450) have served as source documents for the International Building Code (IBC) and its predecessor building codes. Starting in the 2023 edition, ASCE 41 references ACI 369.1 directly for concrete-related provisions. Chapter and section numbers of ASCE 41 cited in ACI 369.1 correspond to ASCE 41-17 unless otherwise noted. This code should be used in conjunction with Chapters 1 through 8 of ASCE 41-17 and applicable sections of the ACI 318-19 Building Code. Chapter 1 of ASCE 41 provides general requirements for evaluation and retrofit, including the selection of performance objectives and retrofit strategies. Chapter 2 of ASCE 41 defines performance objectives and seismic hazards. Chapter 3 of ASCE 41 provides requirements for evaluation and retrofit, including treating as-built information and selecting appropriate screening procedures. Chapter 4 of ASCE 41 summarizes Tier 1 screening procedures, while Chapters 5 and 6 summarize Tier 2 deficiency-based procedures and Tier 3 systematic procedures for evaluation and retrofit, respectively. Chapter 7 of ASCE 41 details analysis procedures referenced in ACI 369.1, including linear and nonlinear analysis procedures, acceptance criteria, and alternative methods for determining modeling parameters and acceptance criteria. Chapter 8 of ASCE 41 provides geotechnical engineering provisions for building foundations and assessment of seismic-geologic site hazards. References to these chapters can be found throughout the standard. The design professional is referred to FEMA 547 for detailed information on seismic rehabilitation measures for concrete buildings. Repair techniques for earthquake-damaged concrete components are not included in ACI 369.1. The licensed design professional is referred to ACI 562, FEMA 306, FEMA 307, and FEMA 308 for information on evaluation and repair of damaged concrete wall components. This code does not provide modeling procedures, acceptance criteria, or rehabilitation measures for concrete-encased steel composite components. Keywords: acceptance criteria; building; deformation-controlled; dynamic analysis; earthquake; force-controlled; modeling parameters; nonlinear analysis; retrofit; seismic evaluation, seismic assessment; structural evaluation.<\/p>\n
| PDF Pages<\/th>\n | PDF Title<\/th>\n<\/tr>\n | ||||||
|---|---|---|---|---|---|---|---|
| 3<\/td>\n | TITLE PAGE <\/td>\n<\/tr>\n | ||||||
| 4<\/td>\n | INTRODUCTION <\/td>\n<\/tr>\n | ||||||
| 7<\/td>\n | CHAPTER 1\u2014GENERAL 1.1\u2014Scope CHAPTER R1\u2014GENERAL R1.1\u2014Scope <\/td>\n<\/tr>\n | ||||||
| 8<\/td>\n | CHAPTER R2\u2014MATERIAL PROPERTIES AND CONDITION ASSESSMENT R2.1\u2014General CHAPTER 2\u2014MATERIAL PROPERTIES AND CONDITION ASSESSMENT 2.1\u2014General <\/td>\n<\/tr>\n | ||||||
| 9<\/td>\n | 2.2\u2014Properties of in-place materials and components R2.2\u2014Properties of in-place materials and components <\/td>\n<\/tr>\n | ||||||
| 17<\/td>\n | 2.3\u2014Condition assessment R2.3\u2014Condition assessment <\/td>\n<\/tr>\n | ||||||
| 19<\/td>\n | 2.4\u2014Knowledge factor R2.5\u2014Properties of new materials <\/td>\n<\/tr>\n | ||||||
| 20<\/td>\n | 2.5\u2014Properties of new materials <\/td>\n<\/tr>\n | ||||||
| 21<\/td>\n | CHAPTER 3\u2014GENERAL ASSUMPTIONS AND REQUIREMENTS 3.1\u2014Modeling and design CHAPTER R3\u2014GENERAL ASSUMPTIONS AND REQUIREMENTS R3.1\u2014Modeling and design <\/td>\n<\/tr>\n | ||||||
| 31<\/td>\n | 3.2\u2014Strength and deformability R3.2\u2014Strength and deformability <\/td>\n<\/tr>\n | ||||||
| 32<\/td>\n | 3.3\u2014Flexure and axial loads R3.3\u2014Flexure and axial loads <\/td>\n<\/tr>\n | ||||||
| 35<\/td>\n | 3.4\u2014Shear and torsion R3.4\u2014Shear and torsion R3.5\u2014Development and splices of reinforcement <\/td>\n<\/tr>\n | ||||||
| 36<\/td>\n | 3.5\u2014Development and splices of reinforcement <\/td>\n<\/tr>\n | ||||||
| 38<\/td>\n | 3.6\u2014Connections to existing concrete R3.6\u2014Connections to existing concrete <\/td>\n<\/tr>\n | ||||||
| 41<\/td>\n | 3.7\u2014Retrofit measures <\/td>\n<\/tr>\n | ||||||
| 42<\/td>\n | \ufffc CHAPTER R4\u2014CONCRETE MOMENT FRAMES CHAPTER 4\u2014CONCRETE MOMENT FRAMES 4.1\u2014Types of concrete moment frames <\/td>\n<\/tr>\n | ||||||
| 43<\/td>\n | R4.2\u2014Reinforced concrete beam-column moment frames 4.2\u2014Reinforced concrete beam-column moment frames <\/td>\n<\/tr>\n | ||||||
| 61<\/td>\n | R4.3\u2014Post-tensioned concrete beam-column moment frames 4.3\u2014Post-tensioned concrete beam-column moment frames <\/td>\n<\/tr>\n | ||||||
| 62<\/td>\n | 4.4\u2014Slab-column moment frames 4.4\u2014Slab-column moment frames <\/td>\n<\/tr>\n | ||||||
| 69<\/td>\n | CHAPTER 5\u2014PRECAST CONCRETE FRAMES 5.1\u2014Types of precast concrete frames 5.2\u2014Precast concrete frames expected to resist seismic forces CHAPTER R5\u2014PRECAST CONCRETE FRAMES R5.1\u2014Types of precast concrete frames R5.2\u2014Precast concrete frames expected to resist seismic forces <\/td>\n<\/tr>\n | ||||||
| 70<\/td>\n | 5.3\u2014Precast concrete frames not expected to resist seismic forces directly R5.3\u2014Precast concrete frames not expected to resist seismic forces directly <\/td>\n<\/tr>\n | ||||||
| 72<\/td>\n | CHAPTER R6\u2014CONCRETE FRAMES WITH INFILLS R6.1\u2014Types of concrete frames with infills R6.2\u2014Concrete frames with masonry infills CHAPTER 6\u2014CONCRETE FRAMES WITH INFILLS 6.1\u2014Types of concrete frames with infills 6.2\u2014Concrete frames with masonry infills <\/td>\n<\/tr>\n | ||||||
| 76<\/td>\n | R6.3\u2014Concrete frames with concrete infills 6.3\u2014Concrete frames with concrete infills <\/td>\n<\/tr>\n | ||||||
| 79<\/td>\n | CHAPTER 7\u2014CONCRETE STRUCTURAL WALLS 7.1\u2014Types of concrete structural walls and associated components CHAPTER R7\u2014CONCRETE STRUCTURAL WALLS R7.1\u2014Types of concrete structural walls and associated components <\/td>\n<\/tr>\n | ||||||
| 81<\/td>\n | R7.2\u2014Strength of reinforced concrete structural walls, wall segments, and coupling beams 7.2\u2014Strength of reinforced concrete structural walls, wall segments, and coupling beams <\/td>\n<\/tr>\n | ||||||
| 83<\/td>\n | R7.3\u2014Linear static and dynamic procedures for reinforced concrete structural walls and wall segments 7.3\u2014Linear static and dynamic procedures for reinforced concrete structural walls and wall segments <\/td>\n<\/tr>\n | ||||||
| 89<\/td>\n | R7.4\u2014Nonlinear static and dynamic procedures for reinforced concrete structural walls and wall segments 7.4\u2014Nonlinear static and dynamic procedures for reinforced concrete structural walls and wall segments <\/td>\n<\/tr>\n | ||||||
| 95<\/td>\n | R7.5\u2014Linear static and dynamic procedures for reinforced concrete coupling beams 7.5\u2014Linear static and dynamic procedures for reinforced concrete coupling beams <\/td>\n<\/tr>\n | ||||||
| 97<\/td>\n | 7.6\u2014Nonlinear static and dynamic procedures for reinforced concrete coupling beams <\/td>\n<\/tr>\n | ||||||
| 99<\/td>\n | 7.7\u2014Retrofit measures for reinforced concrete structural walls, wall segments, and coupling beams R7.7\u2014Retrofit measures for reinforced concrete structural walls, wall segments, and coupling beams <\/td>\n<\/tr>\n | ||||||
| 101<\/td>\n | CHAPTER 8\u2014PRECAST CONCRETE STRUCTURAL WALLS 8.1\u2014Types of precast structural walls CHAPTER R8\u2014PRECAST CONCRETE STRUCTURAL WALLS R8.1\u2014Types of precast structural walls <\/td>\n<\/tr>\n | ||||||
| 102<\/td>\n | 8.2\u2014Precast concrete structural walls and wall segments R8.2\u2014Precast concrete structural walls and wall segments <\/td>\n<\/tr>\n | ||||||
| 107<\/td>\n | CHAPTER 9\u2014CONCRETE-BRACED FRAMES 9.1\u2014Types of concrete-braced frames 9.2\u2014General 9.3\u2014Stiffness of concrete-braced frames CHAPTER R9\u2014CONCRETE-BRACED FRAMES <\/td>\n<\/tr>\n | ||||||
| 108<\/td>\n | 9.4\u2014Strength of concrete-braced frames 9.5\u2014Acceptance criteria for concrete-braced frames <\/td>\n<\/tr>\n | ||||||
| 109<\/td>\n | 9.6\u2014Retrofit measures for concrete-braced \nframes R9.6\u2014Retrofit measures for concrete-braced frames <\/td>\n<\/tr>\n | ||||||
| 110<\/td>\n | CHAPTER 10\u2014CAST-IN-PLACE CONCRETE DIAPHRAGMS R10.1\u2014Components of cast-in-place concrete diaphragms R10.2\u2014Analysis, modeling, and acceptance criteria for cast-in-place concrete diaphragms CHAPTER 10\u2014CAST-IN-PLACE CONCRETE DIAPHRAGMS 10.1\u2014Components of cast-in-place concrete diaphragms 10.2\u2014Analysis, modeling, and acceptance criteria for cast-in-place concrete diaphragms <\/td>\n<\/tr>\n | ||||||
| 111<\/td>\n | R10.3\u2014Retrofit measures for cast-in-place concrete diaphragms 10.3\u2014Retrofit measures for cast-in-place concrete diaphragms <\/td>\n<\/tr>\n | ||||||
| 112<\/td>\n | CHAPTER R11\u2014PRECAST CONCRETE DIAPHRAGMS R11.1\u2014Components of precast concrete diaphragms R11.2\u2014Analysis, modeling, and acceptance criteria for precast concrete diaphragms R11.3\u2014Retrofit measures for precast concrete diaphragms CHAPTER 11\u2014PRECAST CONCRETE DIAPHRAGMS 11.1\u2014Components of precast concrete diaphragms 11.2\u2014Analysis, modeling, and acceptance criteria for precast concrete diaphragms 11.3\u2014Retrofit measures for precast concrete diaphragms <\/td>\n<\/tr>\n | ||||||
| 113<\/td>\n | CHAPTER 12\u2014CONCRETE FOUNDATIONS 12.1\u2014Types of concrete foundations CHAPTER R12\u2014CONCRETE FOUNDATIONS R12.1\u2014Types of concrete foundations <\/td>\n<\/tr>\n | ||||||
| 114<\/td>\n | 12.2\u2014Analysis of existing concrete foundations 12.3\u2014Evaluation of existing condition 12.4\u2014Retrofit measures for concrete foundations R12.2\u2014Analysis of existing concrete foundations R12.4\u2014Retrofit measures for concrete foundations <\/td>\n<\/tr>\n | ||||||
| 117<\/td>\n | CHAPTER 13\u2014NOTATION AND DEFINITIONS 13.1\u2014Notation <\/td>\n<\/tr>\n | ||||||
| 121<\/td>\n | 13.2\u2014Definitions <\/td>\n<\/tr>\n | ||||||
| 123<\/td>\n | CHAPTER 14\u2014REFERENCES <\/td>\n<\/tr>\n | ||||||
| 124<\/td>\n | Authored references <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" ACI CODE-369.1-22: Seismic Evaluation and Retrofit of Existing Concrete Buildings\u2014Code and Commentary<\/b><\/p>\n |