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Texas A&M University College of Engineering

446 Class Lectures – Steel Design – 2014c

Posted on August 3, 2021 by Abigail Stason

Note that getting a text book will be essential to understanding these lectures.  See here.

You can determine what material and pages were covered in the text by checking the dates on the syllabus for this course.

PLEASE NOTE: If you are having problems viewing the files, click here.

 The MP4 files can be downloaded by right-clicking and then “Save Target As.”

You will also need Adobe Reader to view the Notes files. The Notes files can be viewed by left-clicking on them or you can download them to your computer by right-clicking and then “Save Target As.”

Class/Date Streaming Lecture Videos
and Downloads
PDF Class Lecture Notes Materials/Pages Covered
Week 1
Class 1
Monday
9/1
MP4
MOV
Class Notes Introduction, Materials, Loads.
LRFD Design Philosophy.
Material covered in text: pages 1-13.
Class 2
Wednesday
9/3
MP4
MOV
Class Notes Properties of steel. Introduction to use of AISC Manual of Steel Construction. Standard steel shapes. Design philosophy. Broad index of materials to be covered. Factored loads and factored resistance to loads.
Material covered in text: pages 14-29.
Class 3
Friday
9/5
MP4
MOV
Class Notes Properties of factored loads and factored resistances. Equations for predicting likely loads on structural members and available resistances to loads. Example of structure loaded by wind. How tension members fail – by excessive deformation along the length of the member (Gross Section Yield) or by breaking at the ends through the bolt holes (Net Section Fracture).
Material covered in text: pages 23-43.
Week 2
Class 4
Monday
9/8
MP4
MOV
Class Notes How to calculate Ag, An. How to calculate GSY, NSF.  Effective area.  Why, and how to calculate it.  Unconnected outstanding elements of tension members.
Material covered in text: pages 44-50.
Class 5
Wednesday
9/10
MP4
MOV
Class Notes Load drawn out of tension members as it crosses lines of connecting bolts.  U = 1 – xbar/L for every steel shape known, bolted and welded.
Example problems.
Material covered in text: pages 51-57.
Class 6
Friday
9/12
MP4
MOV
Class Notes Staggered bolts in connections.  Workable gages in angles.
Material covered in text: pages 58-65.
Week 3
Class 7
Monday
9/15
MP4
MOV
Class Notes Block shear fracture. Ubs. Design of tension members.
Material covered in text: pages 66-76.
Class 8
Wednesday
9/17
MP4
MOV
Class Notes Photos of block shear.  Yielded bolts.
Compression members.  Effective length factors.  AISC requirements – Global (overall) buckling.  More global buckling examples.  Local buckling of flanges, webs.
Material covered in text: pages 107-119.
Class 9
Friday
9/19
MP4
MOV
Class Notes Column global buckling, local buckling.  Compute design compressive strength of columns using AISC equations.  Global stability.
Material covered in text: pages 119-131e.
Week 4
Class 10
Monday
9/22
MP4
MOV
Class Notes Column buckling about weak or strong axis.  Design of columns which buckle about the weak axis.
Material covered in text: pages 131f-139f.
Class 11
Wednesday
9/24
MP4
MOV
Class Notes Column buckling about weak or strong axis.  Design of columns which buckle about either axis.  Using tables for compression members, tables 4-22 for critical buckling stress. Using tables 4-1 for critical buckling load in the design of a limited selection of columns. Design of columns not in the 4-1 tables by trial and error. Effective column length, KL/r for each possible axis of buckling.  Use of column tables for weak-axis buckling.  Tricking column tables into giving answers for strong-axis buckling,
Material covered in text: pages 140-145f.
Class 12
Friday
9/26
MP4
MOV
Class Notes Columns in multi-story frames as opposed to isolated single-story columns.  Use of G-nomographs to determine effective K for columns. Stiffness Reduction Factors.
Material covered in text: pages 146-152.
Week 5
Class 13
Monday
9/29
MP4
MOV
Class Notes Examples of use of Table for strong-axis buckling.
Beams. Elastic stresses in beams.  Plastic stresses in beams. Plastic moments in beams. Elastic section modulus S, vs. Z, the Plastic Section Modulus.  Comparison of bending strength between a beam subject to an elastic yield moment vs. a plastic moment. Application of Tau b reduction factor.  Beams.
Material covered in text: pages 153-193.
Class 14
Wednesday
10/1
MP4
MOV
Class Notes Plastic moment calculations.  Global and local stability.  Classification of shapes.
Material covered in text: pages 193-198.
Class 15
Friday
10/3
MP4
MOV
Class Notes Bending strength of compact shapes.
Material covered in text: pages 199-203.
Week 6
Class 16
Monday
10/6
MP4
MOV
Class Notes Example problems involving compact beams.  Lateral Torsional Buckling.
Material covered in text: pages 203-206.
Class 17
Wednesday
10/8
MP4
MOV
Class Notes More on Lateral Torsional Buckling.  Shear Strength in the web of the beam.  Increase in lateral torsional buckling strength with Cb.
Introduction to shear strength in beams.
Material covered in text: pages 207-217.
Class 18
Friday
10/10
MP4
MOV
Class Notes Shear capacity of beams.  Block shear capacity on coped beam ends.  Deflection limitations.
Material covered in text: pages 218-225
Week 7
Class 19
Monday
10/13
MP4
MOV
Class Notes Design of beams to resist plastic moment and lateral torsional buckling.
Material covered in text: pages 227-237
Class 20
Wednesday
10/15
Quiz A Quiz A Quiz A
Class 21
Friday
10/17
MP4
MOV
Class Notes Design of beams where two lengths are involved.  Beams where deflections control the design.  Holes drilled in the flanges of beams.
Material covered in text: pages 237-244
Week 8
Class 22
Monday
10/20
MP4
MOV
Class Notes Solution for required thickness of a plate subjected to bending. Beam bearing plates.
Material covered in text: pages 251-254
Class 23
Wednesday
10/22
MP4
MOV
Class Notes Column base plates.  Biaxial bending.  Loads placed through shear center.  Calculation for shear center of a channel.  Loads not placed through shear center.  Biaxial loading. Beam Interaction formulas.  Weak axis capacity of steel shapes.  Example problem of biaxial bending without axial load.  Loads not applied through shear center.
Material covered in text: pages 254-260
Class 24
Friday
10/24
MP4
MOV
Class Notes Biaxial bending.  Shear centers.  Controlling equations for bi-axial bending.  Weak-axis bending strength.
Material covered in text: pages 265-270
Week 9
Class 25
Monday
10/27
MP4
MOV
Class Notes Biaxial bending for various loading cases. Roof purlins. Beam columns. Interaction formulas. Design of members for combined forces – axial and bending about xx and yy axis.
Material covered in text: pages 271-302
Class 26
Wednesday
10/29
MP4
MOV
Class Notes Moment amplification. Combined forces. Three alternative methods of design for stability.
Material covered in text: pages 302-311
Class 27
Friday
10/31
MP4
MOV
Class Notes Columns bent by end moments vs. those bent by transverse loads. Notional loads. Evaluation of moment amplification factor and correction to that factor Cm. Example problems.
Material covered in text: pages 312-315
Week 10
Class 28
Monday
11/3
MP4
MOV
Class Notes Example problems for combined axial and bending. Bolted connections. Shear stress in bolts, bearing stress in plates.
Material covered in text: pages 319-383
Class 29
Wednesday
11/5
MP4
MOV
Class Notes Bearing strength, Spacing, Edge-Distance Requirements, Strength of Fasteners
Material covered in text: pages 383-392
Class 30
Friday
11/7
MP4
MOV
Class Notes Examples, Installation of high-strength bolts, methods of calibrating tension in bolts, How bolts are made, Slip-critical vs. bearing type connections,
Material covered in text: pages 319-383
Week 11
Class 31
Monday
11/10
MP4
MOV
Class Notes Using tables for bolt strength, Design examples, Tensile strength of bolts.
Material covered in text: pages 401-417
Class 32
Wednesday
11/12
Quiz B Quiz B Quiz B
Class 33
Friday
11/14
MP4
MOV
Class Notes Combined shear and tension in fasteners.
Example problems.
Material covered in text: pages 428-431
Class 34
Monday
11/17
MP4
MOV
Class Notes Combined shear and tension in fasteners.
Example problems.
Welded connections.
Material covered in text: pages 437-444
Class 35
Wednesday
11/19
MP4
MOV
Class Notes Cover Quiz B
Class 36
Friday
11/21
MP4
MOV
Class Notes Welds. Fillet welds. Strength. Direction of loading.
Material covered in text: pages 443-449
Class 37
Monday
11/24
MP4
MOV
Class Notes Design of welds. Min/max sizes, other practical considerations.  Material covered in text: pages 450-459
Class 38
Wednesday
11/26
MP4
MOV
Class Notes Examples of Eccentric Connections
Elastic Analysis
Material covered in text: pages 477-483
Thanksgiving
Friday
11/28
Thanksgiving Thanksgiving Thanksgiving
Class 39
Monday
12/1
MP4
MOV
Class Notes Eccentrically loaded bolt groups. Plastic behavior of bolts. Analysis by elastic and instantaneous center of rotation methods.
Material covered in text: pages 483-485
Class 40
Wednesday
12/3
MP4
MOV
Class Notes Material covered in text: pages 485-490
Class 41
Friday
12/5
MP4
MOV
Class Notes Material covered in text: pages 490-495
Week 12
Class 42
Monday
12/8
MP4
MOV
Class Notes Material covered in text: pages 496-506

 

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