Practical Steel Connection Software Design Using AISC 2010 Standard

Size: px

Start display at page:

Download "Practical Steel Connection Software Design Using AISC 2010 Standard"

Brice Mills
5 years ago
Views:

1 Practical Steel Connection Software Design Using AISC 2010 Standard Including: Practical Advice for Reviewing Software Generated Connection Designs Steve Ashton, P.E., SECB

2 Limit States that Changed 2

3 Bolt Limit States 3

4 Bolt Materials Group A: (Includes A325 and F1852) F u = 120 ksi * Group B: (Includes A490 and F2280) F u = 150 ksi (* up to 1 diameter) 4

5 Allowable Shear Strength A325N 21 ksi 24 ksi 27 ksi A325X 30 ksi 30 ksi 34 ksi A490N 28 ksi 30 ksi 34 ksi A490X 40 ksi 37.5 ksi 42 ksi 5

6 Table J

7 Table J

8 Bolt Limit States 8

9 Slip Critical Joints 2005 Specification R n = μd u h sc T b N s (J3 4) Prevention of Slip is a Serviceability Limit State LRFD: = 1.00 ASD: = 1.50 Prevention of Slip at Required Strength Level LRFD: = 0.85 ASD: =

10 Slip Critical Joints R n = μd u h sc T b N s (2005 J3 4) = 0.35 (Class A) = 0.50 (Class B) R n = μd u h f T b N s (2010 J3 4) = 0.30 (Class A) = 0.50 (Class B) 10

11 Slip Critical Joints R n = μd u h sc T b N s (2005 J3 4) h sc = 1.00 (STD) h sc = 0.85 (OVS or SSL) h sc = 0.70 (LSL) R n = μd u h f T b N s = 1.00 (STD) = 0.85 (OVS or SSL) = 0.70 (LSL) (2010 J3 4) 11

12 Slip Critical Joints 2010 Specification R n = μd u h f T b N s (J3 4) h f = 1.00 (0 or 1 Filler) h f = 0.85 (2 or more Fillers) 12

13 Limit States 13

14 New Section J4.5 14

15 Other 14 th Ed. Changes Prying Action Single Plate Shear Connections (Shear Tabs) Fillers New Tables 15

16 Other 14 th Ed. Changes Prying Action Single Plate Shear Connections (Shear Tabs) Fillers New Tables 16

17 With prying action: Prying Action (ASD) t min pf u 4Tb' (1 ') T = required strength per bolt p = tributary length per bolt line 2b = 1 d / p d = width of hole along length of fitting 17

18 Prying Action Nomenclature

19 Prying Action Double Angle Connection 19

20 Expanded Bolt Spacing 20

21 Wide Gage 21

22 Narrow Gage 22

23 Narrow Gage and Expanded Bolt Spacing 23

24 Other 14 th Ed. Changes Prying Action Single Plate Connections (Shear Tabs) Fillers New Tables 24

25 Conventional Configuration 25

26 Conventional Configuration 26

27 Single Plate Connection Conventional Configuration 13 th Edition Manual t p or t w d/2 + 1/16 14 th Edition Manual No requirement if n 5 and SSLT 27

28 Single Plate Connection Conventional Configuration 13 th Edition Manual Eccentricity can be ignored if: n 9 and STD or n 12 and SSLT 14 th Edition Manual Eccentricity always considered per Table

29 Other 14 th Ed. Changes Prying Action Single Plate Shear Connections (Shear Tabs) Fillers New Tables 29

30 Fillers 30

31 Fillers: J

32 Fillers: J

33 Fillers: J Commentary 33

34 Other 14 th Ed. Changes Prying Action Single Plate Shear Connections (Shear Tabs) Fillers New Tables 34

35 14 th Edition Manual New Tools Table Approx. Number of Passes for Welds Table Min. Inside Radius for Cold Bending Table Clearances for Skewed Connections Table Seated Connections to HSS 35

36 14 th Edition Manual New Tools Table Approx. Number of Passes for Welds Table Min. Inside Radius for Cold Bending Table Clearances for Skewed Connections Table Seated Connections to HSS 36

37 Tables and

38 14 th Edition Manual New Tools Table Approx. Number of Passes for Welds Table Min. Inside Radius for Cold Bending Table Clearances for Skewed Connections Table Seated Connections to HSS 38

39 Table

40 Practical Steel Connection Software Design Using AISC 2010 Standard Practical Advice for Reviewing Software Generated Connection Designs

41 Software Generated Calculations

42 Reviewing Software Generated Connection Designs Look at Every Connection Know the Required Strengths Determine the Load Path Estimate the Capacity See Evaluating a Connection Handout Quick Hand Calculations (Numbers to Memorize) Printed Calculations Evaluate Constructability! 42

43 Reviewing Software Generated Connection Designs Look at Every Connection Know the Required Strengths Determine the Load Path Estimate the Capacity See Evaluating a Connection Handout Quick Hand Calculations (Numbers to Memorize) Printed Calculations Evaluate Constructability! 43

44 Reviewing Software Generated Connection Designs Look at Every Connection Know the Required Strengths Determine the Load Path Estimate the Capacity See Evaluating a Connection Handout Quick Hand Calculations (Numbers to Memorize) Printed Calculations Evaluate Constructability! 44

45 Required Strengths AISC COSP Section

46 Transfer Forces 46

47 Transfer Forces 47

48 Transfer Forces 48

49 Transfer Forces 49

50 Transfer Forces 50

51 Reviewing Software Generated Connection Designs Look at Every Connection Know the Required Strengths Determine the Load Path Estimate the Capacity See Evaluating a Connection Handout Quick Hand Calculations (Numbers to Memorize) Printed Calculations Evaluate Constructability! 51

52 Load Path Uniform Force Method 52

53 AISC Nomenclature 53

54 Column Forces Uniform Force Method (Equations from Manual) V c P r Hc e r c P Beam forces H b P r Vb e r b P Where r e 2 c e 2 b and tan e tan b e c 54

55 Uniform Force Method (Traditional) 55

56 Connection Calculations 56

57 Uniform Force Method (Compact Gusset) 57

58 Connection Calculations 58

59 Workpoint Relocation (Special Case 1) 59

60 Workpoint Relocation (Special Case 1) 60

61 Workpoint Relocation (Special Case 1) 61

62 Reviewing Software Generated Connection Designs Look at Every Connection Know the Required Strengths Determine the Load Path Estimate the Capacity See Evaluating a Connection Handout Quick Hand Calculations (Numbers to Memorize) Printed Calculations Evaluate Constructability! 62

63 Calculating Capacity 63

64 Calculating Capacity 64

65 Calculating Capacity 10 Numbers to Memorize (2010 ASD)

66 Reviewing Software Generated Connection Designs Look at Every Connection Know the Required Strengths Determine the Load Path Estimate the Capacity See Evaluating a Connection Handout Quick Hand Calculations (Numbers to Memorize) Printed Calculations Evaluate Constructability! 66

67 Constructability

68 Constructability

69 Constructability

70 Constructability

71 Constructability

72 Constructability

73 Constructability

74 Connection Costs

75 Connection Costs

76 Connection Costs

77 Connection Costs

78 Summary Reviewing Software Generated Connection Designs Look at Every Connection Know the Required Strengths Determine the Load Path Estimate the Capacity See Evaluating a Connection Handout Quick Hand Calculations (Numbers to Memorize) Printed Calculations Evaluate Constructability! 78

79 Questions Contact Info: Steve Ashton

Analysis of Shear Lag in Steel Angle Connectors

University of New Hampshire University of New Hampshire Scholars' Repository Honors Theses and Capstones Student Scholarship Spring 2013 Analysis of Shear Lag in Steel Angle Connectors Benjamin Sawyer