Etabs Steel Frame Design Manual

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Etabs Steel Frame Design Manual


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 4-2Steel Frame Design Manual
ii
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
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 21-1Steel Frame Design Manual
Overwrites 21-1
Making Changes in the Overwrites Form     21-4
Resetting Steel Frame Overwrites to Default
Values 21-5

22      Design Loading Combinations

Reference 22-2

23      Classification of Sections

24      Calculation of Factored Forces and Moments

Reference 24-2

25      Calculation of Nominal Strengths        

26      Calculation of Capacity Ratios

Overview 26-1
Axial and Bending Stresses 26-1
Shear Stresses 26-2

27      Seismic Requirements

Ordinary Moment Frames 27-1
Special Moment Resisting Frames 27-1
Braced Frames 27-2
Eccentrically Braced Frames 27-3
Special Concentrically Braced Frames         27-7

28      Joint Design

Weak-Beam / Strong-Column Measure       28-1
Evaluation of Beam Connection Shears       28-3
Evaluation of Brace Connection Forces       28-4

29      Continuity Plates

30      Doubler PlatesContents

31      Input Data

Input Data 31-1
Using the Print Design Tables Form 31-6

32      Output Details

Using the Print Design Tables Form 32-4
Steel Frame Design Specific to AISC-ASD89

33      General and Notation

Introduction to the AISC-ASD89 Series of
Technical Notes 33-1
Notation 33-2

34      Preferences

General  34-1
Using the Preferences Form 34-1
Preferences 34-2

35      Overwrites

General 35-1
Overwrites 35-1
Making Changes in the Overwrites Form     35-3
Resetting the Steel Frame Overwrites to Default Values 35-4

36      Design Load Combinations

37      Classification of Sections

38      Calculation of Stresses

39      Calculation of Allowable Stresses

Allowable Stress in Tension 39-1
Allowable Stress in Compression 39-1
Flexural Buckling 39-2Steel Frame Design Manual
Flexural-Torsional Buckling 39-4
Allowable Stress in Bending 39-8
I-Sections 39-8
Channel Sections 39-12
T Sections and Double Angles          39-13
Box Sections and Rectangular
Tubes 39-13
Pipe Sections 39-14
Round Bars 39-15
Rectangular and Square Bars 39-15
Single-Angle Sections 39-15
General Sections 39-18
Allowable Stress in Shear 39-18
Major Axis of Bending 39-18
Minor Axis of Bending 39-19

40      Calculation of Stress Ratios

Axial and Bending Stresses 40-1
Shear Stresses 40-4

41      Input Data

Input Data 41-1
Using the Print Design Tables Form 41-5

42      Output Details

Using the Print Design Tables Form 42-3
Steel Frame Design Specific to AISC-LRFD93

43      General and Notation

Introduction to the AISC-LRFD93 Series of
Technical Notes 43-1
Notation 43-2

44      Preferences

General 44-1
Using the Preferences Form 44-1
Preferences 44-2

45      Overwrites

General 45-1
Overwrites 45-1
Making Changes in the Overwrites Form     45-4
Resetting Steel Frame Overwrites to Default
Values 45-4

46      Design Load Combinations

Reference 46-2

47      Classification of Sections

48      Calculation of Factored Forces and Moments

Reference 48-3

49      Calculation of Nominal Strengths

Overview 49-1
Compression Capacity 49-2
Flexural Buckling 49-2
Flexural-Torsional Buckling 49-3
Torsional and Flexural-Torsional
Buckling 49-6
Tension Capacity 49-8
Nominal Strength in Bending 49-8
Yielding 49-9
Lateral-Torsional Buckling 49-9
Flange Local Buckling 49-13
Web Local Buckling 49-17
Shear Capacities 49-21
Major Axis of Bending 49-21
Minor Axis of Bending 49-22

50      Calculation of Capacity Ratios

Overview 50-1Steel Frame Design Manual viii
Axial and Bending Stresses 50-1
Shear Stresses 50-2

51      Input Data

Input Data 51-1
Using the Print Design Tables Form 51-6

52      Output Details


Using the Print Design Tables Form 52-3
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