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332 Steel L1 Introduction

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    Design of Steel Structural

    803459-3

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    Mohammed Alsabban [email protected]

    Office : 1153

    Ext. 1142

    Mobile 0-5555-10-233

    Office Hours:

    Sun 8am:10am Tue 11am:12 noon

    Wed 5pm:6pm

    mailto:[email protected]:[email protected]
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    Text Book: Structural Steel Design

    Authors:

    Jack C. McCormac and

    Stephen F. Csernak

    Publisher: Pearson

    Edition: Fifth (International)

    Year: 2012

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    Manual 14thedition of the Steel Construction Manual

    (AISCM)

    Based on the 2010 Specification for Structural

    Steel Buildings (ANSI / AISC 360-10), (AISCS)

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    Topics Covered During ClassS/N Topic title Lecture

    Hours

    Weeks

    (Equivalent)

    1 Introduction to Structural Steel Design 2 0.67

    2 Specifications, Loads, and Methods of Design 1 0.33

    3 Analysis of Tension Members 3 14 Design of Tension Members 3 1

    5 Intro to Axially Loaded Compression Members 3 1

    First Term Exam 1 0.33

    6 Design of Axially Loaded Compression Members 2 0.67

    7 Design of Axially Loaded Compression Members (Continued) and Column

    Base Plates3 1

    8 Introduction to Beams 2 0.67

    Second Term Exam 1 0.33

    9 Design of Beams for Moments 3 1

    10 Design of Beams-Miscellaneous Topics (Shear, Deflection, etc) 3 1

    11 Bending and Axial Force 3 1

    Third Term Exam 1 0.33

    12 Bolted Connections 2 0.66Forth Term Exam 1 0.33

    13 Eccentrically Loaded Bolted Connections and Historical Notes on Rivets2 0.67

    14 Welded Connections 3 1

    Fifth Term Exam 1 0.33

    Review 3 1

    Final Examination 2 0.67

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    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

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    Disadvantages Corrosion

    Fireproofing Cost

    Susceptibility to buckling

    Fatigue

    Brittle fracture

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    Structural Steel

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    First Completely Framed with

    Structural Steel BuildingCompleted in Chicago in 1890

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    Historical Note

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    Rolled-steel shapes

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    Cold-formed shapes

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    Concrete floor slabs Cast on formed steel decks

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    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

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    Stress-Strain Relationships Typical stress-strain diagram for mild or low-

    carbon structural steel at room temperature

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    Stress-Strain Relationships Typical stress-strain curves

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    Brittle steel Typical stress-strain diagram for brittle steel

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    f f

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    ASTM Specification for Structural Shapes

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    f d l d

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    Part of detail drawing

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    Part of erection drawing

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    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

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    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

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    Loads Accurate estimation

    Worst possible combinations

    If no local code

    use ASCE 7 (ANSI 58.1Standards)

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    Dead Loads

    Other are found in part 17 of AISCM

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    Live Loads Typical minimum uniform table (p.55)

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    Live Loads Typical Concentrated Live Loads table 2.3 p55

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    Impact Impact factor (p. 56)

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    Environmental Loads Snow

    Rain

    Wind

    Earthquake

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    Two Design Methods LRFD (Load and Resistance Factor Design)

    Reduction factor

    Nominal Strength Rn

    Computed factored force Ru Rn Ru

    ASD (Allowable Strength Design)

    Safety factor

    Largest computed force Ra

    Ra

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    Combined Loads

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    Combined Loads

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