structural steel design by jay ryan santos
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Structural Steel DesignBy: Engr. Jay Ryan R. Santos
Civil-Structural Engineer
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I. Introduction to Steel DesignII. Tension MembersIII. Columns (Compression Design)IV. Beams (Flexure Design)V. Combined Bending and Axial loadVI. TorsionVII. Frames- Braced, Unbraced and RigidVIII. Bolts
IX. WeldingX. ConnectionsXI. Composite Steel-Concrete ConstructionXII. Steel Design for High Seismic
Course Syllabus
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References: AISC 14thEdition
AISC 360-10
NSCP 6thEdition (2010)
Steel Structures (Design andBehaviour) 5thEdition by
Salmon and Johnson
Course Syllabus
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Why Steel?
Advantages:
1) Lightweight per structure compare to RC
2) Easy to Fabricate and Install
3) High Salvage Value
Introduction to Structural SteelDesign
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Why Steel?
Disadvantages:
1) Fire susceptible
2) High Maintenance (Painting, Rust Proofing, etc..)
3) Vibration Susceptible (thin members supportingheavy and cyclical loadings)
Introduction to Structural SteelDesign
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Introduction to Structural SteelDesign
Fig. 1: Steel Pipe Rack
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Introduction to Structural Steel
Design
Fig. 2: Modular Steel Structures
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Introduction to Structural Steel
Design
Fig. 3: Available Steel Grades and Properties (Salmon and Johnson,Steel Structures 4thEd)
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Types of Structural Steel:
Rolled Shapes
Introduction to Structural Steel
Design
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Types of Structural Steel:
Cold-Formed
Introduction to Structural Steel
Design
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Unstiffened and Stiffened Elements
Introduction to Structural Steel
Design
UnstiffenedElements
StiffenedElement
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Compact and Non- Compact Sections
Introduction to Structural Steel
Design
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Introduction to Structural Steel
DesignSlender and Nonslender Elements
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Allowable Strength Design (ASD) as per AISC 360-10
and NSCP 2010.
Ra Rn/
Introduction to Structural SteelDesign
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Load and Resistance Factor Design (LRFD) as per AISC
360-10 and NSCP 2010.
Ru Rn
Introduction to Structural SteelDesign
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Loads, Load Factors and Load Combinations:
D = dead loadL = live load
Lr= roof live load
S = snow load
R = nominal load due to initial rainwater or ice exclusiveof the pounding contribution.
W = wind load
E= earthquake load
Introduction to Structural SteelDesign
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LRFD Load Combination: AISC 360-10
1. 1.4D
2. 1.2D+1.6L+0.5(Lr OR S or R)
3. 1.2D+1.6(Lr or S or R) + (0.5L or 0.5W)
4. 1.2D+1.0W+0.5L+0.5(Lr or S or R)
5. 1.2D+1.0E+0.5L+0.2S
6. 0.9D+1.0W
7. 0.9D+1.0E
Introduction to Structural SteelDesign
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Introduction to Structural SteelDesign
ASD Load Combination: AISC 360-10
1. D
2. D+L
3. D+(Lr or S or R)
4. D+0.75L+0.75(Lr or S or R)
5. D+(0.6W or 0.7E)
6. 0.6D+0.6W
7. 0.6D+0.7E