Design of Structural Steel Connections
First Edition 2007Contributing author and editor S.A. Munter Author T.J.Hogan
ConnectionHandbook1 BACKGROUNDANDTHEORY
Handbook1:
Handbook1.
Designofstructuralsteel connections.
by
T.J.Hogan
contributingauthor&editorS.A.Munter
firstedition-2007
Copyright @ 2007 by AUSTRALIAN STEEL INSTITUTE
Published by: AUSTRALIAN STEEL INSTITUTE
the written permission of Australian Steel Institute.
Note to mercial software developers:Copyright of the information contained within this publication isheld by Australian Steel Institute (ASl).Written permission must be obtained from ASI for the use of any
FIRST EDITION 2007 (LIMIT STATES)
National Library of Australia Cataloguing-in-Publication entry:
1" ed. Bibliography.2. 1. Steel Structural-Standards - Australlia. Steel Structural-Specifications - Australia.3. I. Joints (Engineering)-Design and construction. Munter S.A.II. III. Australian Steel Institute. Title(Series: Structural steel connection series; 1).
This publication originated as part ofDesign of structural connectionsFirst edition 1978 Second edition 1981Third edition 1988 Fourth edition 1994
ISBN 978 0 909945947 (pbk.).
Also in this series:
Design capacity tables for structura steel Volume 3: Simple connections open sectionsDesign Guide 1: Bolting in structural steel connectionsDesign Guide 2: Welding in structural steel connections Design Guide 3: Web side plate connectionsDesign Guide 4: Flexible end plate connections Design Guide 5: Angle cleat connections Design Guide 6: Seated connections
accuracy of the information contained in this publication this information should not be used or reliedupon for any specific application without investigation and verification as to its accuracy suitability andand expenses incurred as a result of the negligence of the authors editors or publishers.
The information in this publication should not be relied upon as a substitute for independent due osed euossod edoo e o ses u spea su u pue ape eo eussod uor persons should be sought.
CONTENTS
Page
List of figures ivPreface List of tables vAbout the author vii viAbout the contributing author and editor Acknowledgements vi vi
1CONCEPT OF DESIGN GUIDES. 11.1Background 1
2.1 2.2 Forms of construction General considerations 2 32.3 Connection design models 62.4 Connection characteristics 7
3 BOLTS AND BOLT GROUPS 10
3.1 Bolt types and bolting categories 103.2 3.3 Bolt dimensions Dimensions of wrenches for 11instaling bolts 123.4 3.5 Bolt mechanical properties Designrequirements for bolts 14 153.6 AS 4100 Design requirements- Strengthlimit state 173.7 AS 4100 design requirements-3.8 Serviceabilitylimit state Geometric requirements of 233.9 Bolt group loaded in-plane AS 4100 for bolted connections 26 283.10 Design example No. 1- Design of3.11 Design example No. 2-Design of bolts in lap splice connection 393.12 Bolt group loaded out-of-plane bolt group loaded in-plane 41 443.13 Prying action 463.14 Design example No. 3--Design of bolt group loaded out-of-plane 50
4 WELDS AND WELD GROUPS. 52
4.1 Weld types4.2 Standard weld symbols 4.3 Selection of prequalified welding4.4 Weld categories consumables4.5 Design of butt welds Strength limit state4.6 Design of fillet welds4.7 Weld group loaded in-plane Strengthlimit state4.8 3Weld group loaded out-of-plane
4.9Weld group loaded by generalset of design actions 674.10 Properties of mon fillet weld groups 694.11 Practical fillet weld groups 4.12 Design example No. 4 71loaded in-plane Design of fillet weld group4.13 Design example No. 5 75Design of fillet weld group loaded out-of-plane 76
5 CONNECTION COMPONENTS. 77
5.1Angle ponents 775.2 Flat bar ponents 5.3 Plate ponents 80 795.4 Design capacities 81
6 SUPPORTED MEMBERS 86
6.2 Uncoped sections 6.1 General 86 876.3 Design example No. 6-- UB unholed and holed momentand shear capacity 936.5Design example No.7 6.4 Single web coped sections 95UB single web coped moment and shear capacity 1016.6Double web coped sections 1026.7 Design example No.8 UB double web coped moment6.8Lateral torsional buckling and shear capacity 106 1056.9 Block shear failure of coped6.10 Web reinforcement of coped sections 107supported members 109
7 SUPPORTING MEMBERS.. Rationalised dimensions 110 .1107.2 Gaugelines 7.1 113
8 MINIMUM DESIGN ACTIONS ON8.1 AS 4100 Requirements CONNECTIONS. .116 116
9 REFERENCES. .118
APPENDICESA Limcon software 120B ASI Handbook 1 ment form 125
LIST OFFIGURES
Page
PageFigure 33 Design forces per unit lengthFigure 34 Fillet weld subject to longitudinal parallel to weld group axes x y z .61Figure 35 General fillet weld group. and transverse shear forces... .61Figure 36 Horizontal and vertical weld .63in a weld group. ponent forces at a point .65Figure 37 Fillet weld group loaded out-of-plane.Figure 38 General fllet weld group. .67 66Figure 39 Possible critical points in particular fillet weld group... .71Figure 40 Fillet weld group loaded in-Figure 41Two parallel vertical welds and out-of-plane .72Figure42Twoparallel horizontal welds loaded out-of-plane ..72Figure43 Filet weld group loaded in-plane..75 loaded out-of-plane .74Figure 44 Fillet weld group loadedFigure 45 Rectangular connection out-of-plane. 76Figure 46 Rectangular ponent design ponent geometry. ..81moment capacity- Major axis.. 82Figure 47 Rectangular ponent design moment capacity-Minor axis.. .82Figure 48 Rectangular ponent design capacity in axial tension ..Figure 49 Examples of block shear ...83Figure 50 Block shear area in ponents..85 failure in ponents 84Figure52Section with holesin oneflange...8 Figure 51 Section with holes in both flanges.88Figure 53 Section with holes in one flange...89Figure 54 Single web coped (SWC) sections 95 Figure 55 SWC universal beam (UB). .95Figure 56 T-Section of SWC UB showingFigure 57 SWC UB T-section with plastic elastic neutral axis. .96Figure 58 SWC UB T-section with plastic neutral axis in web. 96Figure 59 SWC universal beam example. neutral axis in the flange. ...01 97Figure 60 Double web coped (DWC)Figure 61 Elastic neutral axis in sections. .102Figure 62 DWC universal beam example. DWC section. ..105 .103Figure 63 Block shear failure in DWCFigure 64 Block shear area in SWC members. 107Figure 65 Web reinforcement of coped and DwC members. .108supported members.. .109
Figure 1 Rigid connections. 4Figure2 Figure 3 Momentrotation characteristics Simple connections 5Figure 4 End plate tear-out failure edge of typical connections. 7distances..Figure 5 End plate tear-out failure force ponents. 16Figure 7 Figure 6 Lap joint and brace/gusset End plate tear-out simple case ....16Bolt group subject toin-plane connection ... 21Figure 8 moment. .28Figure 9 forces at centroid. Bolt group subject to shear 29Figure 10 Bolt group subject to a generalFigure 11 Graphical relationship-Bolt force load set.. 29Figure 12 Horizontal and vertical bolt to ponent displacement. ..30forces at an extreme bolt.. 31Figure 13 Single bolt column loaded in-plane... .32Figure 14 Single bolt column-Forces and edge distances for end platetear-out or bearing failure .. ...33Figure 15 Double bolt column loaded in-plane.. 35Figure 16 Double bolt columnForces and edge distances for end platetear-out or bearing failure. 36Figure 18 Bolt group loaded in-plane.. Figure 17 Bolted plate splice .39 41Figure 19 Bolt group loaded out-of-plane- Design actons...Figure 20 Double bolt column geometry. 45Figure 21 Prying mechanism in T-stub connection. 46Figure 22 Graphical relationship-Bolt load/applied load for a stiffT-stub flangeFigure 23 Graphical relationship-Bolt load/applied load for a flexibleFigure 24 T-stub critical dimensions and T-stub flange 47design actions.Figure 25 T-stub parameters. Figure 26 Bolt group loaded out-of-plane ... 50 48Figure 28 Weld types.. Figure 27 T-stub geometry 51 52Figure 29 Symbols for welds on drawings . ... 53Figure 30 Design throat thickness of inplete penetration butt weld.57Figure 31 Design throat thickness ofFigure 32 Design actions on a fillet weld. fillet welds. ....60 89
