Lesson 26: AISC Design Aids for Bending

1
Lesson 26 AISC Design Aids for Bending

• CE311 Fall 2007
• October 26th 2007

2
(No Transcript)
3
(No Transcript)
4
A Business Idea for this Class
5
Produce Charts e.g. Mapp 280 ft-kips, Lb
15
6
Produce Charts e.g. Mapp 280 ft-kips, Lb
15
7
Produce Charts e.g. Mapp 280 ft-kips, Lb
15
8
Produce Charts e.g. Mapp 280 ft-kips, Lb
15
9
e.g.1 LTB Charts pp. 3-96

• Given Pick lightest A992 W
• Mapp 310 ft-kips
• Lb 20 feet

10
e.g.1 LTB Charts pp. 3-96 to

• Given Pick lightest A992 W
• Mapp 310 ft-kips
• Lb 20 feet

11
e.g.1 LTB Charts pp. 3-96 to

• Given Pick lightest A992 W
• Mapp 310 ft-kips
• Lb 20 feet

12
e.g.1 LTB Charts pp. 3-96 to 3-139 (Fy50
ksi !!)

• Given Pick lightest A992 W
• Mapp 310 ft-kips
• Lb 20 feet

13
e.g.1 LTB Charts pp. 3-96 to

• Given Pick lightest A992 W
• Mapp 310 ft-kips
• Lb 20 feet

14
e.g.1 LTB Charts pp. 3-96 to

• Given Pick lightest A992 W
• Mapp 310 ft-kips
• Lb 20 feet

15
e.g.1 LTB Charts pp. 3-96 to

• Given Pick lightest A992 W
• Mapp 310 ft-kips
• Lb 20 feet

16
e.g.1 LTB Charts pp. 3-96 to

• Given Pick lightest A992 W
• Mapp 310 ft-kips
• Lb 20 feet

W24x84
17
e.g.2 Pick a Shape (assume insignif. Self Wt.)

• Given A992

Papp 60kips
24 feet
18
Handy Cb Chart
19
(No Transcript)
20
(No Transcript)
21
(No Transcript)
22
Awesome Design Aids and Limitations

• 1. Plastic
• 2.

23
Awesome Design Aids and Limitations

• The LTB Charts

1. Plastic 2. LTB 3. Flange Local Buckling
24
Awesome Design Aids and Limitations

• The LTB Charts
• Plastic, LTB, and Local Buckling are considered
• Limitations

1. Plastic 2. LTB 3. Flange Local Buckling
25
Awesome Design Aids and Limitations

• The LTB Charts
• Plastic, LTB, and Local Buckling are considered
• Limitations
• Fy 50 ksi
• W and C shapes

1. Plastic 2. LTB 3. Flange Local Buckling
26
Awesome Design Aids and Limitations
1. Plastic 2. LTB 3. Flange Local Buckling
27
Awesome Design Aids and Limitations

• The Z Tables

1. Plastic 2. LTB 3. Flange Local Buckling
28
Awesome Design Aids and Limitations

• The Z Tables
• Plastic and Local Buckling are considered
• Limitations

1. Plastic 2. LTB 3. Flange Local Buckling
29
Awesome Design Aids and Limitations

• The Z Tables
• Plastic and Local Buckling are considered
• Limitations
• Fy 50 ksi
• W and C shapes

1. Plastic 2. LTB 3. Flange Local Buckling
30
Awesome Design Aids and Limitations

• The Uniform Load Tables

1. Plastic 2. LTB 3. Flange Local Buckling
31
Awesome Design Aids and Limitations

• The Uniform Load Tables
• Plastic and Local Buckling are considered

1. Plastic 2. LTB 3. Flange Local Buckling
32
Awesome Design Aids and Limitations

• The Uniform Load Tables
• Plastic and Local Buckling are considered
• They automatically include beam self-weight!

1. Plastic 2. LTB 3. Flange Local Buckling
33
Awesome Design Aids and Limitations

• The Uniform Load Tables
• Plastic and Local Buckling are considered
• They automatically include beam self-weight!
• Limitations

1. Plastic 2. LTB 3. Flange Local Buckling
34
Awesome Design Aids and Limitations

• The Uniform Load Tables
• Plastic and Local Buckling are considered
• They automatically include beam self-weight!
• Limitations
• Uniform Loads
• Fy 50 ksi
• W and C shapes
• Simply-Supported

1. Plastic 2. LTB 3. Flange Local Buckling
35
Handling Word Problems Getting the Fast Answer
1. Plastic 2. LTB 3. Flange Local Buckling
36
Handling Word Problems Getting the Fast Answer

• Select a continuously supported W beam for a
  uniform load

1. Plastic 2. LTB 3. Flange Local Buckling
37
Handling Word Problems Getting the Fast Answer

• Select a continuously supported W beam for a
  uniform load
• Fast Z-tables
• Faster LTB Chart
• Really Fast Uniform Load Tables

1. Plastic 2. LTB 3. Flange Local Buckling
38
Handling Word Problems Getting the Fast Answer

• Select a continuously supported W beam for a
  point load

1. Plastic 2. LTB 3. Flange Local Buckling
39
Handling Word Problems Getting the Fast Answer

• Select a continuously supported W beam for a
  point load
• Fast Z-tables
• Faster LTB Chart
• Really Fast Uniform Load Tables

1. Plastic 2. LTB 3. Flange Local Buckling
40
Handling Word Problems Getting the Fast Answer

• Select a W beam for a point load with Lb 12
  feet

1. Plastic 2. LTB 3. Flange Local Buckling
41
Handling Word Problems Getting the Fast Answer

• Select a W beam for a point load with Lb 12
  feet
• Slow Z-tables
• Faster LTB Chart
• Really Fast Uniform Load Tables

1. Plastic 2. LTB 3. Flange Local Buckling
42
Handling Word Problems Getting the Fast Answer

• Compute the allowable capacity of a built-up
  beam with Lb 12 feet

1. Plastic 2. LTB 3. Flange Local Buckling
43
Handling Word Problems Getting the Fast Answer

• Compute the allowable capacity of a built-up
  beam with Lb 12 feet
• Strictly hand-calcs

1. Plastic 2. LTB 3. Flange Local Buckling