Design of Steel Structural 803459-3

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Text Book: Structural Steel Design Authors: Publisher: Pearson Jack C. McCormac and Stephen F. Csernak Publisher: Pearson Edition: Fifth (International) Year: 2012

Manual 14th edition of the Steel Construction Manual (AISCM) Based on the 2010 Specification for Structural Steel Buildings (ANSI / AISC 360-10), (AISCS)

Topics Covered During Class S/N Topic title Lecture Hours Weeks (Equivalent) 1 Introduction to Structural Steel Design 2 0.67 Specifications, Loads, and Methods of Design 0.33 3 Analysis of Tension Members 4 Design of Tension Members 5 Intro to Axially Loaded Compression Members   First Term Exam 6 Design of Axially Loaded Compression Members 7 Design of Axially Loaded Compression Members (Continued) and Column Base Plates 8 Introduction to Beams Second Term Exam 9 Design of Beams for Moments 10 Design of Beams-Miscellaneous Topics (Shear, Deflection, etc) 11 Bending and Axial Force Third Term Exam 12 Bolted Connections 0.66 Forth Term Exam 13 Eccentrically Loaded Bolted Connections and Historical Notes on Rivets 14 Welded Connections Fifth Term Exam Review Final Examination Total 45 15

Structural Steel Advantages Great Strength Light weight Ease of fabrication Uniformity Elasticity Permanence Ductility Toughness Additions to existing structures Ability to be fastened together by several simple connectors Adaptation to prefabrication Speed of erection Ability to be rolled into wide variety of sizes and shapes Reuse Scrap value Structural Steel Design, Fifth Edition, McCormac and Csernak, 2012 (International 10

Structural Steel Disadvantages Corrosion Fireproofing Cost Susceptibility to buckling Fatigue Brittle fracture Structural Steel Design, Fifth Edition, McCormac and Csernak, 2012 (International 11

Effect of temperature on yield strength Structural Steel Design, Fifth Edition, McCormac and Csernak, 2012 (International 12

First Completely Framed with Structural Steel Building Historical Note First Completely Framed with Structural Steel Building Completed in Chicago in 1890 Structural Steel Design, Fifth Edition, McCormac and Csernak, 2012 (International 13

Rolled-steel shapes Structural Steel Design, Fifth Edition, McCormac and Csernak, 2012 (International 14

Cold-formed shapes Structural Steel Design, Fifth Edition, McCormac and Csernak, 2012 (International 15

Concrete floor slabs Cast on formed steel decks 16 Structural Steel Design, Fifth Edition, McCormac and Csernak, 2012 (International 16

Metric Units The metric equivalents of the standard U.S. shapes are provided in section 17 of AISCM W920 X 449 means 920 mm deep and weight 449 kg/m Structural Steel Design, Fifth Edition, McCormac and Csernak, 2012 (International 17

Stress-Strain Relationships Typical stress-strain diagram for mild or low-carbon structural steel at room temperature Structural Steel Design, Fifth Edition, McCormac and Csernak, 2012 (International 18

Stress-Strain Relationships Typical stress-strain curves Structural Steel Design, Fifth Edition, McCormac and Csernak, 2012 (International 19

Brittle steel Typical stress-strain diagram for brittle steel 20 Structural Steel Design, Fifth Edition, McCormac and Csernak, 2012 (International 20

ASTM Specification for Structural Shapes Structural Steel Design, Fifth Edition, McCormac and Csernak, 2012 (International 21

Structural Steel Design, Fifth Edition, McCormac and Csernak, 2012 (International 22

Part of detail drawing Structural Steel Design, Fifth Edition, McCormac and Csernak, 2012 (International 23

Part of erection drawing Structural Steel Design, Fifth Edition, McCormac and Csernak, 2012 (International 24

Responsibilities of the Structural Designer Safety Safely support loads Control deflection Control vibrations Cost Standard size members Simple connections and details Low cost maintenance Constructability Learn detailing Learnt fabrication Learn erection of steel Structural Steel Design, Fifth Edition, McCormac and Csernak, 2012 (International 25

Building Code and Specifications Must refer to Building Code and Specifications Local Building Code and Rules of Municipalities AISCS will be used for Structural steel Structural Steel Design, Fifth Edition, McCormac and Csernak, 2012 (International 26

Loads Accurate estimation Worst possible combinations If no local code  use ASCE 7 (ANSI 58.1 Standards) Structural Steel Design, Fifth Edition, McCormac and Csernak, 2012 (International 27

Dead Loads Other are found in part 17 of AISCM 28 Structural Steel Design, Fifth Edition, McCormac and Csernak, 2012 (International 28

Live Loads Typical minimum uniform table (p.55) 29 Structural Steel Design, Fifth Edition, McCormac and Csernak, 2012 (International 29

Live Loads Typical Concentrated Live Loads table 2.3 p55 30 Structural Steel Design, Fifth Edition, McCormac and Csernak, 2012 (International 30

Impact Impact factor (p. 56) 31 Structural Steel Design, Fifth Edition, McCormac and Csernak, 2012 (International 31

Environmental Loads Snow Rain Wind Earthquake 32 Structural Steel Design, Fifth Edition, McCormac and Csernak, 2012 (International 32

Two Design Methods LRFD (Load and Resistance Factor Design) Reduction factor φ Nominal Strength Rn Computed factored force Ru φ Rn ≥ Ru ASD (Allowable Strength Design) Safety factor Ω Largest computed force Ra 𝑅 𝑛 Ω ≥ Ra Structural Steel Design, Fifth Edition, McCormac and Csernak, 2012 (International 33

Combined Loads