Description

Fatigue is a mechanical degradation process caused by repeated loads, such as traffic loading or wind loads on a bridge, that results in irreversible damage in concrete structures. Many types of concrete elements are subjected to repeated loads, such as airport and roadway pavements, bridge girders, bridge decks, wind turbines, and prestressed concrete railroad ties. This document provides information that will benefit practicing engineers interested in the design or rehabilitation of concrete structures subjected to high-cycle fatigue—that is, stress cycles in which the material behavior remains within the elastic range. The effects of repeated loads on plain concrete, reinforcing materials, and reinforced concrete systems are discussed based on a summary of available literature. This report does not contain detailed design procedures but rather should be considered a general resource providing a comprehensive overview of fatigue issues in reinforced concrete structures.

Keywords:

design; fabric-reinforced cementitious matrix; fatigue; fiber-reinforced concrete; fiber-reinforced polymers; prestressed concrete; rehabilitation; reinforced concrete; reinforcing materials; service life.

Document Details

Author: ACI Committee 215

Publication Year: 2022

Pages: 37

ISBN: 9781641951753

Formats: Protected PDF/Web View

Table of Contents

CHAPTER 1—INTRODUCTION AND SCOPE, p. 2

1.1—Introduction, p. 2

1.2—Scope, p. 3

CHAPTER 2—NOTATION AND DEFINITIONS, p. 3

2.1—Notation, p. 3

2.2—Definitions, p. 4

CHAPTER 3—PLAIN CONCRETE, p. 4

3.1—Scope, p. 4

3.2—General, p. 4

3.3—Fatigue as a degenerative process, p. 4

3.4—Fatigue life models, p. 6

3.5—Important parameters, p. 6

CHAPTER 4—REINFORCING MATERIALS, p. 9

4.1—Scope, p. 9

4.2—Fatigue of steel, p. 9

4.3—Fatigue of fiber-reinforced polymer composites, p. 14

CHAPTER 5—CONCRETE REINFORCED WITH BARS, p. 16

5.1—Scope, p. 16

5.2—Concrete reinforced with steel bars, p. 16

5.3—Concrete reinforced with FRP bars, p. 18

CHAPTER 6—CONCRETE REINFORCED WITH PRESTRESSING REINFORCEMENT, p. 19

6.1—General, p. 19

6.2—Definitions, p. 19

6.3—Fatigue of fully prestressed concrete, p. 19

6.4—Fatigue of partially prestressed concrete, p. 20

6.5—Fatigue serviceability aspects, p. 22

CHAPTER 7—CONCRETE REINFORCED WITH DISCRETE FIBERS, p. 23

7.1—Scope, p. 23

7.2—General, p. 23

7.3—Fiber types, p. 24

CHAPTER 8—CONCRETE REINFORCED WITH EXTERNAL SHEETS OR LAMINATES, p. 25

8.1—Scope, p. 25

8.2—Steel-reinforced concrete strengthened with external FRP materials, p. 25

8.3—Fatigue of adhesive systems for externally bonded FRP, p. 26

8.4—Steel-reinforced concrete strengthened with external FRCM materials, p. 27

CHAPTER 9—REFERENCES, p. 27

Authored references, p. 28

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