crack control of beams design (cover)
TRANSCRIPT
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Reinforced Concrete Buildings Series
Design Booklet RCB-1.1(1)
Crack Control of BeamsPart 1: AS 3600 Design
OneSteel Reinforcing
Guide to Reinforced Concrete Design
August 2000
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7/29/2019 Crack Control of Beams Design (Cover)
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OneSteel Reinforcing
Guide to Reinforced Concrete Design
Crack Control of Beams (Part 1: AS 3600 Design) August 2000
Reinforced Concrete Buildings: Chapter 1 Beams
RCB-1.1(1)-ii
Published by
OneSteel ReinforcingOneSteel Reinforcing Pty Ltd ACN 004 148 289
Produced by the
Centre for Construction Technology ResearchSCHOOL OF CIVIC ENGINEERING AND ENVIRONMENT
University of Western Sydney
Contributors
Prof. Russell Bridge
Dr. Mark Patrick
Dr. Andrew WheelerCentre for Construction Technology Research
Reviewed by
Prof. Ian GilbertUniversity of New South Wales
Copyright 2000 OneSteel Reinforcing and The University ofWestern Sydney. All rights reserved.
First published: February 2000
Republished:
August 2000
Acknowledgement
Some material in this booklet has been sourced from AustralianStandard AS 3600-1994 and its draft revision Public Review DraftDR 99193 CP, and permission for its use has been kindly granted byStandards Australia.
DisclaimerWhile every effort has been made and all reasonable care taken toensure the accuracy of the material contained herein, thecontributors, editors and publishers of this booklet shall not be heldto be liable or responsible in any way whatsoever, and expresslydisclaim any liability or responsibility for any loss or damage, costs orexpenses, howsoever incurred by any person whether the user ofthis booklet or otherwise including but without in any way limiting anyloss or damage, costs or expenses incurred as a result of or inconnection with the reliance, whether whole or partial by any personas aforesaid upon any part of the contents of this booklet. Shouldexpert assistance be required, the services of a competent person
should be sought.
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7/29/2019 Crack Control of Beams Design (Cover)
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OneSteel Reinforcing
Guide to Reinforced Concrete Design
Crack Control of Beams (Part 1: AS 3600 Design) August 2000
Reinforced Concrete Buildings: Chapter 1 Beams
RCB-1.1(1)-iii
Contents
Preface ........................................................................................................... v
1. SCOPE AND GENERAL
1.1 Scope ................................................................................................... 11.2 General.................................................................................................2
2. TERMINOLOGY ................................................................................................. 3
3. DESIGN CONCEPTS & MODELS
3.1 General.................................................................................................4
3.2 Crack Width Limits ...............................................................................5
3.3 Cracking of Reinforced-Concrete Elements
3.3.1 Introduction ........................................................................5
3.3.2 Cracking in Tension Elements
3.3.2.1 Classical Theory .................................................6
3.3.2.2 Minimum Reinforcement ....................................8
3.3.3 Cracking in Flexural Elements
3.3.3.1 General...............................................................10
3.3.3.2 Minimum Reinforcement ....................................10
3.4 Actions Causing Cracking of Reinforced-Concrete Beams.................. 11
3.5 Crack Width Calculations in Accordance with Eurocode 2
3.5.1 Introduction ........................................................................14
3.5.2 Derivation of Crack Width Formulae.................................. 14
3.5.3 Minimum Reinforcement ....................................................17
3.6 Simplified Design Method in Eurocode 2
3.6.1 Minimum Reinforcement ....................................................17
3.6.2 Crack Width as a Function of Bar Diameter
or Bar Spacing....................................................................19
3.7 Other Relevant Design Requirements in Eurocode 2
3.7.1 Skin Reinforcement (Cl. 4.4.2.3(4)) ...................................23
3.7.2 Bundled Bars (Cl. 5.2.7.1(2)) .............................................23
3.7.3 Minimum Reinforcement Percentage (Cl. 5.4.2.1.1(1)) ..... 23
3.7.4 Detailing in Monolithic Construction (Cl. 5.4.2.1.2(1))........ 23
3.7.5 Avoiding Yielding of Reinforcement (Cl. 4.4.1.1(6-7))........ 24
4. DESIGN APPROACHES
4.1 General.................................................................................................25
4.2 Simplified Design Rules vs Crack Width Calculation ...........................26
4.3 Flowcharts for Simplified Design Approaches...................................... 27
5. DESIGN RULES
5.1 General.................................................................................................33
5.2 AS 3600-1994....................................................................................... 33