Steel Frame Design Manual

283 Pages·2002·4.12 MB·English

by  Steve Pyle

®
ETABS
Integrated Building Design Software
Steel Frame Design Manual
Computers and Structures, Inc.
Version 8
Berkeley, California, USA January 2002

Copyright
The computer program ETABS and all associated documentation are proprietary and
copyrighted products. Worldwide rights of ownership rest with Computers and
Structures, Inc. Unlicensed use of the program or reproduction of the documentation in
any form, without prior written authorization from Computers and Structures, Inc., is
explicitly prohibited.
Further information and copies of this documentation may be obtained from:
Computers and Structures, Inc.
1995 University Avenue
Berkeley, California 94704 USA
Phone: [phone]
FAX: [phone]
e-mail: [email protected] (for general questions)
e-mail: [email protected] (for technical support questions)
web: www.csiberkeley.com
 Copyright Computers and Structures, Inc., 1978-2002.
The CSI Logo is a trademark of Computers and Structures, Inc.
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DISCLAIMER
CONSIDERABLE TIME, EFFORT AND EXPENSE HAVE GONE INTO THE
DEVELOPMENT AND DOCUMENTATION OF ETABS. THE PROGRAM HAS
BEEN THOROUGHLY TESTED AND USED. IN USING THE PROGRAM,
HOWEVER, THE USER ACCEPTS AND UNDERSTANDS THAT NO WARRANTY
IS EXPRESSED OR IMPLIED BY THE DEVELOPERS OR THE DISTRIBUTORS
ON THE ACCURACY OR THE RELIABILITY OF THE PROGRAM.
THIS PROGRAM IS A VERY PRACTICAL TOOL FOR THE DESIGN/CHECK OF
STEEL STRUCTURES. HOWEVER, THE USER MUST THOROUGHLY READ THE
MANUAL AND CLEARLY RECOGNIZE THE ASPECTS OF STEEL DESIGN THAT
THE PROGRAM ALGORITHMS DO NOT ADDRESS.
THE USER MUST EXPLICITLY UNDERSTAND THE ASSUMPTIONS OF THE
PROGRAM AND MUST INDEPENDENTLY VERIFY THE RESULTS.

©COMPUTERS AND STRUCTURES, INC., BERKELEY, CALIFORNIA DECEMBER 2001
STEEL FRAME DESIGN
Contents
General Steel Frame Design Information
1 General Design Information
Design Codes 1-1
Units 1-1
Overwriting the Frame Design Procedure
for a Steel Frame 1-1
Design Load Combinations 1-2
Analysis Sections and Design Sections 1-3
Second Order P-Delta Effects 1-4
Element Unsupported Lengths 1-6
Effective Length Factor (K) 1-7
Continuity Plates and Doubler Plates 1-9
2 Steel Frame Design Process
Steel Frame Design Procedure 2-1
Automating the Iterative Design Process 2-5
3 Interactive Steel Frame Design
General 3-1
Steel Stress Check Information Form 3-1
Overwrites Button 3-4
Details Button 3-4
4 Output Data Plotted Directly on the Model
Overview 4-1
Design Input 4-1
Design Output 4-2
i
Steel Frame Design Manual
Steel Frame Design Specific to UBC97-ASD
5 General and Notation
Introduction to the UBC-ASD Series of
Technical Notes 5-1
Notations 5-3
References 5-6
6 Preferences
General 6-1
Using the Preferences Form 6-1
Preferences 6-2
7 Overwrites
General 7-1
Overwrites 7-1
Making Changes in the Overwrites Form 7-3
Resetting Steel Frame Overwrites to Default
Values 7-4
8 Design Load Combinations
9 Classification of Sections
Overview 9-1
10 Calculation of Stresses
11 Calculation of Allowable Stresses
12 Calculation of Stress Ratios
Axial and Bending Stresses 12-1
Shear Stresses 12-3
13 Seismic Requirements
Ordinary Moment Frames 13-1
Special Moment Resisting Frames 13-1
ii
Contents
Braced Frame 13-2
Eccentrically Braced Frames 13-4
Special Concentrically Braced Frames 13-7
14 Joint Design
Beam/Column Plastic Moment Capacity
Ratio 14-1
Evaluation of Beam Connection Shears 14-3
Evaluation of Brace Connection Forces 14-4
15 Continuity Plates
16 Doubler Plates
17 Input Data
Input Data 17-1
Using the Print Design Tables Form 17-5
18 Output Details
Using the Print Design Tables Form 18-4
Steel Frame Design Specific to UBC97-LRFD
19 General and Notation
Introduction to the UBC97-LRFD Series of
Technical Notes 19-1
Notation 19-3
References 19-7
20 Preferences
General 20-1
Using the Preferences Form 20-1
Preferences 20-2
21 Overwrites
General 21-1
iii