MNL-7(23) GFRP-Reinforced Concrete Design Handbook

Description

The GFRP Reinforced Concrete Design Handbook is a vital reference for professionals interested in the use of non-metallic GFRP reinforcement for concrete structures. It is meant to provide valuable insight to structural engineers on understanding and utilizing the provisions of “Building Code Requirements for Structural Concrete Reinforced with Glass Fiber Reinforced Polymer (GFRP) Bars” (ACI CODE 440.11).

The GFRP Reinforced Concrete Design Handbook provides several engineering design examples for various concrete members reinforced with GFRP bars including beams, one-way slabs, two-way slabs, and slender columns. The examples help illustrate the provisions of ACI CODE 440.11 as they pertain to serviceability, flexural strength, shear strength, torsional strength, axial strength, stability, and structural analysis. Many of the examples are based on a fictious four-story GFRP reinforced concrete building to illustrate how the design provisions work together in a full building design. These examples are also closely related to the example problems presented in the ACI Reinforced Concrete Design Handbook (ACI MNL-17) to allow for comparison to the steel reinforced concrete members presented in MNL-17. Each example starts with a brief problem statement and then presents a full set of design calculations that reference the appropriate provisions in ACI CODE 440.11 (red highlighted text next to equations) to arrive at a solution. Detailed explanations of the design calculations are provided throughout.

In addition to the example problems, this handbook provides general information and guidance about the appropriate use of GFRP reinforcement, its material and durability characteristics, typical applications, and considerations for fire resistance. It also highlights key differences between designing GFRP reinforced concrete versus traditional steel reinforced concrete.

The appendix to this handbook provides additional detailed information from FRP bar manufactures on commercially available products and solutions.

Document Details

Author: ACI/NEx

Pages: 212

ISBN: 9781641952309

Formats: Printed Document or Protected PDF/Web View

Table of Contents

Preface 6

CHAPTER 1—INTRODUCTION 7

1.1—ACI CODE-440.11 format and scope 8

1.2—Format and scope of this manual 10

1.3—Example building floor plan and section 10

1.4—Example building loads 13

1.5—Example building material properties 13

CHAPTER 2—FRP MATERIALS 15

2.1—Constituent materials 15

2.2—Mechanical properties 16

2.3—Thermal properties 18

2.4—Long-term properties 19

CHAPTER 3—BENEFITS AND USE 21

3.1—Introduction 21

3.2—Noncorrosive 21

3.3—Lightweight 22

3.4—Easily cut 23

3.5—Nonmagnetic 24

3.6—Nonconductive 25

3.7—Low thermal conductivity 25

CHAPTER 4—CODES AND STANDARDS 27

4.1—Material tests and standards 27

4.2—Construction standards 29

4.3—Scope of ACI CODE-440.11 29

4.4—ACI CODE-440.11 and the International Building Code 30

CHAPTER 5—APPLICATIONS 33

CHAPTER 6—FIRE 37

6.1—Fire resistance in ACI CODE-440.11 37

6.2—Other fire protection strategies 40

CHAPTER 7—ONE-WAY SLABS 41

ONE-WAY SLAB EXAMPLE—FIVE SPAN CONTINUOUS SLAB 42

STEP 1—MATERIAL REQUIREMENTS 42

STEP 2—SLAB GEOMETRY 43

STEP 3—LOADS AND LOAD PATTERNS 44

STEP 4—ANALYSIS 44

STEP 5—FLEXURAL DESIGN FOR CRACK CONTROL 45

STEP 6—CHECK DEFLECTIONS 48

STEP 7—CHECK SUSTAINED STRESS LIMIT 53

STEP 8—CHECK MOMENT CAPACITY 53

STEP 9—CHECK SHEAR CAPACITY 55

STEP 10—CHECK GFRP REINFORCEMENT LIMITS 57

STEP 11—DEVELOPMENT LENGTH AND SPLICES 57

STEP 12—FINAL DESIGN AND DETAILING 58

CHAPTER 8—TWO-WAY SLABS 59

TWO-WAY SLAB EXAMPLE—DIRECT DESIGN METHOD 60

STEP 1—MATERIAL REQUIREMENTS 60

STEP 2—SLAB GEOMETRY 61

STEP 3—LOADS AND LOAD PATTERNS 61

STEP 4—ANALYSIS 62

STEP 5—FLEXURAL DESIGN FOR SERVICEABILITY 66

STEP 6—CHECK DEFLECTIONS 69

STEP 7—CHECK SUSTAINED STRESS LIMIT 72

STEP 8—CHECK MOMENT CAPACITY 72

STEP 9—ONE-WAY SHEAR STRENGTH 73

STEP 10—TWO-WAY SHEAR STRENGTH 74

STEP 11—DEVELOPMENT LENGTH AND SPLICES 75

STEP 12—FINAL DESIGN AND DETAILING 76

CHAPTER 9—BEAMS 77

BEAM EXAMPLE 1—CONTINUOUS INTERIOR T-BEAM 80

STEP 1—MATERIAL PROPERTIES 80

STEP 2—BEAM GEOMETRY 81

STEP 3—LOADS AND PATTERNS 82

STEP 4—ANALYSIS 83

STEP 5—FLEXURAL DESIGN FOR SERVICEABILITY 83

STEP 6—CHECK SPACING REQUIREMENTS 88

STEP 7—CHECK CREEP RUPTURE STRESS LIMIT 92

STEP 8—CHECK FLEXURAL STRENGTH 93

STEP 9—DEVELOPMENT LENGTHS, HOOKS, AND SPLICES 95

STEP 10—DETAIL THE BOTTOM REINFORCEMENT 96

STEP 11—SKIN REINFORCEMENT 101

BEAM EXAMPLE 2—CONTINUOUS INTERIOR T-BEAM AT FIRST INTERIOR SUPPORT 104

STEP 1—MATERIAL REQUIREMENTS 104

STEP 2—BEAM GEOMETRY 105

STEP 3—FLEXURAL DESIGN FOR SERVICEABILITY 105

STEP 4—CHECK CREEP RUPTURE STRESS LIMIT 111

STEP 5—CHECK FLEXURAL STRENGTH 111

STEP 6—CONSIDER IMPACT ON MIDSPAN DEFLECTION 114

STEP 7—DEVELOPMENT LENGTH AND SPLICES 114

STEP 8—DETAIL THE TOP REINFORCEMENT 115

STEP 9—SKIN REINFORCEMENT 116

BEAM EXAMPLE 3—CONTINUOUS INTERIOR T-BEAM AT EXTERIOR SUPPORT 118

STEP 1—MATERIAL REQUIREMENTS 118

STEP 2—BEAM GEOMETRY 119

STEP 3—FLEXURAL DESIGN FOR SERVICEABILITY 119

STEP 4—CHECK CREEP RUPTURE STRESS LIMIT 122

STEP 5—CHECK FLEXURAL STRENGTH 122

STEP 6—DEVELOPMENT LENGTH AND HOOKS 124

STEP 7—DETAIL THE TOP REINFORCEMENT 126

STEP 9—SKIN REINFORCEMENT 127

BEAM EXAMPLE 4—SHEAR DESIGN OF FIRST INTERIOR BEAM 130

STEP 1—MATERIAL PROPERTIES 130

STEP 2—BEAM GEOMETRY AND LOADS 131

STEP 3—BEAM SHEAR CONTRIBUTION 132

STEP 4—DETERMINE SPACING OF GFRP STIRRUPS 134

STEP 5—CHECK SHEAR AT BAR CUTOFF LOCATIONS 136

STEP 6—FINAL STIRRUP PLACEMENT 137

STEP 7—FINAL STIRRUP DETAILING 138

BEAM EXAMPLE 5—CONTINUOUS EXTERIOR L-BEAM 139

STEP 1—MATERIAL PROPERTIES 139

STEP 2—BEAM GEOMETRY 141

STEP 3—LOADS AND PATTERNS 141

STEP 4—ANALYSIS 142

STEP 5—FLEXURAL DESIGN AT MIDSPAN 143

STEP 6—DETAIL THE BOTTOM REINFORCEMENT 151

STEP 7—NEGATIVE MOMENT REINFORCEMENT 154

STEP 8—SKIN REINFORCEMENT 158

STEP 9—SHEAR REINFORCEMENT REQUIREMENTS 159

STEP 9—TORSION REINFORCEMENT REQUIREMENTS 161

STEP 10—CHECK FLEXURAL STRENGTH IN THE NEGATIVE MOMENT REGION 168

STEP 11—DETAILING LONGITUDINAL REINFORCEMENT 169

CHAPTER 10—COLUMNS 176

COLUMN EXAMPLE 1—INTERIOR COLUMN ANALYSIS 179

STEP 1—DETERMINE COLUMN SIZE 180

STEP 2—EVALUATE SLENDERNESS 182

STEP 3—SWAY OR NONSWAY MOMENT FRAME 184

STEP 4—DETERMINE SECOND-ORDER (P∆) EFFECTS FOR SWAY 185

STEP 5—SUMMARY 186

COLUMN EXAMPLE 2—INTERIOR COLUMN DESIGN 187

STEP 1—LONGITUDINAL REINFORCEMENT MATERIAL PROPERTIES 187

STEP 2—INITIAL DESIGN OF LONGITUDINAL REINFORCEMENT 187

STEP 3—AXIAL LOAD-MOMENT INTERACTION DIAGRAM 188

STEP 4—TRANSVERSE REINFORCEMENT MATERIAL PROPERTIES 193

STEP 5—DETAILING TRANSVERSE REINFORCEMENT 194

STEP 6—REINFORCEMENT THROUGH THE JOINT AT LEVEL 2 196

STEP 7—DETAIL THE COLUMN SPLICE AT JOINT AT LEVEL 2 196

STEP 8—SUMMARY 198

REFERENCES 199

Authored documents 200

APPENDIX 203

ERRATA INFO

Any applicable errata are included with individual documents at the time of purchase. Errata are not included for collections or sets of documents such as the ACI Collection. For a listing of and access to all product errata, visit the Errata page.

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