ACI ITG-4.3R presents a literature review on seismic design using high-strength concrete. The document is organized in chapters addressing the structural design of columns, beams, beam-column joints, and structural walls made with high-strength concrete, and focuses on aspects most relevant for seismic design. Each chapter concludes with a series of recommended modifications to ACI 318-05 based on the findings of the literature review. The recommendations include proposals for the modification of the equivalent rectangular stress block, equations to calculate the axial strength of columns subjected to concentric loading, column confinement requirements, limits on the specified yield strength of confinement reinforcement, strut factors, and provisions for the development of straight bars and hooks. Keywords: bond; confinement; drift; flexure; high-strength concrete; high-yield-strength reinforcement; seismic application; shear; stress block; strut-and-tie.<\/p>\n
| PDF Pages<\/th>\n | PDF Title<\/th>\n<\/tr>\n | ||||||
|---|---|---|---|---|---|---|---|
| 3<\/td>\n | CONTENTS CONTENTS <\/td>\n<\/tr>\n | ||||||
| 4<\/td>\n | CHAPTER 1\u2014 INTRODUCTION CHAPTER 1\u2014 INTRODUCTION 1.1\u2014 Background 1.1\u2014 Background <\/td>\n<\/tr>\n | ||||||
| 5<\/td>\n | 1.2\u2014Scope 1.2\u2014Scope <\/td>\n<\/tr>\n | ||||||
| 6<\/td>\n | CHAPTER 2\u2014 NOTATION CHAPTER 2\u2014 NOTATION <\/td>\n<\/tr>\n | ||||||
| 9<\/td>\n | CHAPTER 3\u2014 DEFINITIONS CHAPTER 3\u2014 DEFINITIONS CHAPTER 4\u2014 DESIGN FOR FLEXURAL AND AXIAL LOADS USING EQUIVALENT RECTANGULAR STRESS BLOCK CHAPTER 4\u2014 DESIGN FOR FLEXURAL AND AXIAL LOADS USING EQUIVALENT RECTANGULAR STRESS BLOCK <\/td>\n<\/tr>\n | ||||||
| 10<\/td>\n | 4.1\u2014Parameters of equivalent rectangular stress block 4.1\u2014Parameters of equivalent rectangular stress block <\/td>\n<\/tr>\n | ||||||
| 11<\/td>\n | 4.2\u2014Stress intensity factor \u03b11 4.2\u2014Stress intensity factor \u03b11 <\/td>\n<\/tr>\n | ||||||
| 12<\/td>\n | 4.3\u2014Stress block depth parameter \u03b21 4.3\u2014Stress block depth parameter \u03b21 <\/td>\n<\/tr>\n | ||||||
| 13<\/td>\n | 4.4\u2014Stress block area \u03b11\u03b21 4.4\u2014Stress block area \u03b11\u03b21 4.5\u2014Limiting strain \u03b5cu 4.5\u2014Limiting strain \u03b5cu <\/td>\n<\/tr>\n | ||||||
| 14<\/td>\n | 4.6\u2014Axial strength of high-strength concrete columns 4.6\u2014Axial strength of high-strength concrete columns <\/td>\n<\/tr>\n | ||||||
| 16<\/td>\n | 4.7\u2014Comparison of different proposals for rectangular stress block 4.7\u2014Comparison of different proposals for rectangular stress block <\/td>\n<\/tr>\n | ||||||
| 19<\/td>\n | 4.8\u2014Recommendations 4.8\u2014Recommendations <\/td>\n<\/tr>\n | ||||||
| 21<\/td>\n | CHAPTER 5\u2014 CONFINEMENT REQUIREMENTS FOR BEAMS AND COLUMNS CHAPTER 5\u2014 CONFINEMENT REQUIREMENTS FOR BEAMS AND COLUMNS 5.1\u2014Constitutive models for confined concrete 5.1\u2014Constitutive models for confined concrete <\/td>\n<\/tr>\n | ||||||
| 22<\/td>\n | 5.2\u2014Previous research and general observations 5.2\u2014Previous research and general observations <\/td>\n<\/tr>\n | ||||||
| 25<\/td>\n | 5.3\u2014Equations to determine amount of confinement reinforcement required in columns 5.3\u2014Equations to determine amount of confinement reinforcement required in columns <\/td>\n<\/tr>\n | ||||||
| 29<\/td>\n | 5.4\u2014Definition of limiting drift ratio on basis of expected drift demand 5.4\u2014Definition of limiting drift ratio on basis of expected drift demand <\/td>\n<\/tr>\n | ||||||
| 30<\/td>\n | 5.5\u2014Use of high-yield-strength reinforcement for confinement 5.5\u2014Use of high-yield-strength reinforcement for confinement <\/td>\n<\/tr>\n | ||||||
| 32<\/td>\n | 5.6\u2014Maximum hoop spacing requirements for columns 5.6\u2014Maximum hoop spacing requirements for columns <\/td>\n<\/tr>\n | ||||||
| 33<\/td>\n | 5.7\u2014Confinement requirements for high-strength concrete beams 5.7\u2014Confinement requirements for high-strength concrete beams <\/td>\n<\/tr>\n | ||||||
| 34<\/td>\n | 5.8\u2014Maximum hoop spacing requirements for high- strength concrete beams 5.8\u2014Maximum hoop spacing requirements for high- strength concrete beams 5.9\u2014Recommendations 5.9\u2014Recommendations <\/td>\n<\/tr>\n | ||||||
| 37<\/td>\n | CHAPTER 6\u2014 SHEAR STRENGTH OF REINFORCED CONCRETE FLEXURAL MEMBERS CHAPTER 6\u2014 SHEAR STRENGTH OF REINFORCED CONCRETE FLEXURAL MEMBERS <\/td>\n<\/tr>\n | ||||||
| 38<\/td>\n | 6.1\u2014Shear strength of flexural members without shear reinforcement 6.1\u2014Shear strength of flexural members without shear reinforcement <\/td>\n<\/tr>\n | ||||||
| 39<\/td>\n | 6.2\u2014Effect of compressive strength on inclined cracking load of flexural members 6.2\u2014Effect of compressive strength on inclined cracking load of flexural members <\/td>\n<\/tr>\n | ||||||
| 40<\/td>\n | 6.3\u2014Effect of compressive strength on flexural members with intermediate to high amounts of transverse reinforcement 6.3\u2014Effect of compressive strength on flexural members with intermediate to high amounts of transverse reinforcement 6.4\u2014Shear strength of members with low shear span- depth ratios 6.4\u2014Shear strength of members with low shear span- depth ratios <\/td>\n<\/tr>\n | ||||||
| 43<\/td>\n | 6.5\u2014Calculation of shear strength of members subjected to seismic loading 6.5\u2014Calculation of shear strength of members subjected to seismic loading <\/td>\n<\/tr>\n | ||||||
| 44<\/td>\n | 6.6\u2014Use of high-strength transverse reinforcement 6.6\u2014Use of high-strength transverse reinforcement 6.7\u2014Recommendations 6.7\u2014Recommendations <\/td>\n<\/tr>\n | ||||||
| 46<\/td>\n | CHAPTER 7\u2014 DEVELOPMENT LENGTH\/SPLICES CHAPTER 7\u2014 DEVELOPMENT LENGTH\/SPLICES 7.1\u2014Design equations for development length of bars in high- strength concrete 7.1\u2014Design equations for development length of bars in high- strength concrete <\/td>\n<\/tr>\n | ||||||
| 47<\/td>\n | 7.2\u2014Design equations for development length of hooked bars in high- strength concrete 7.2\u2014Design equations for development length of hooked bars in high- strength concrete <\/td>\n<\/tr>\n | ||||||
| 48<\/td>\n | 7.3\u2014Recommendations 7.3\u2014Recommendations <\/td>\n<\/tr>\n | ||||||
| 50<\/td>\n | CHAPTER 8\u2014 DESIGN OF BEAM-COLUMN JOINTS CHAPTER 8\u2014 DESIGN OF BEAM-COLUMN JOINTS 8.1\u2014Confinement requirements for beam- column joints 8.1\u2014Confinement requirements for beam- column joints <\/td>\n<\/tr>\n | ||||||
| 51<\/td>\n | 8.2\u2014Shear strength of exterior joints 8.2\u2014Shear strength of exterior joints 8.3\u2014Shear strength of interior joints 8.3\u2014Shear strength of interior joints 8.4\u2014Effect of transverse reinforcement on joint shear strength 8.4\u2014Effect of transverse reinforcement on joint shear strength <\/td>\n<\/tr>\n | ||||||
| 52<\/td>\n | 8.5\u2014Development length requirements for beam- column joints 8.5\u2014Development length requirements for beam- column joints 8.6\u2014Recommendations 8.6\u2014Recommendations <\/td>\n<\/tr>\n | ||||||
| 53<\/td>\n | CHAPTER 9\u2014 DESIGN OF STRUCTURAL WALLS CHAPTER 9\u2014 DESIGN OF STRUCTURAL WALLS 9.1\u2014Boundary element requirements 9.1\u2014Boundary element requirements <\/td>\n<\/tr>\n | ||||||
| 54<\/td>\n | 9.2\u2014Shear strength of walls with low aspect ratios 9.2\u2014Shear strength of walls with low aspect ratios 9.3\u2014Minimum tensile reinforcement requirements in walls 9.3\u2014Minimum tensile reinforcement requirements in walls <\/td>\n<\/tr>\n | ||||||
| 55<\/td>\n | 9.4\u2014Recommendations 9.4\u2014Recommendations CHAPTER 10\u2014 LIST OF PROPOSED MODIFICATIONS TO ACI 318- 05 CHAPTER 10\u2014 LIST OF PROPOSED MODIFICATIONS TO ACI 318- 05 10.1\u2014Proposed modifications to equivalent rectangular stress block 10.1\u2014Proposed modifications to equivalent rectangular stress block <\/td>\n<\/tr>\n | ||||||
| 56<\/td>\n | 10.2\u2014Proposed modifications related to confinement of potential plastic hinge regions 10.2\u2014Proposed modifications related to confinement of potential plastic hinge regions <\/td>\n<\/tr>\n | ||||||
| 57<\/td>\n | 10.3\u2014Proposed modifications related to bond and development of reinforcement 10.3\u2014Proposed modifications related to bond and development of reinforcement <\/td>\n<\/tr>\n | ||||||
| 58<\/td>\n | 10.4\u2014Proposed modifications related to strut- and- tie models 10.4\u2014Proposed modifications related to strut- and- tie models ACKNOWLEDGMENTS ACKNOWLEDGMENTS CHAPTER 11\u2014 CITED REFERENCES CHAPTER 11\u2014 CITED REFERENCES <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" ITG-4.3R-07 Report on Structural Design & Detailing for High Strength Concrete in Moderate to High Seismic Applications<\/b><\/p>\n |