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Design of Steel Structure Commercial Building - Two Storey
Typology: Lecture notes
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Objective : To design the structural members of the building; steel beams and column, steel purlins, concrete grade beams and pedestals and footings.
Software: STAAD Pro V8i
Dead Load: Steel Unit Weight 77 KN/m Concrete Unit Weight 24 KN/m 150mm CHB 3.11 KN/m 100mm CHB 2.98 KN/m
Floor Load 150mm Deck Slab 3.6 KN/m Floor Finish 1.10 KN/m Ceiling 0.10 KN/m MEP 0.10 KN/m
Live Load: Light Storage 6 KN/m Roof Live Load 0.60 KN/m
Seismic Parameter:
Wind Parameters: Wind (ASCE7-05/NSCP 2015) Vwind 260Kph Importance Factor 1 Exposure B
Material Properties: Concrete Compressive Strength 21Mpa
Strutural Steel (A36 Steel) Yield Strength 248Mpa Ultimate Tensile Strength 414Mpa
Zone = 4 Seismic Source Type = A Importance Factor ( I ) = 1.0 (Standard Occupancy) Rx = 8.5 Moment Frame Rz = 8.5 Moment Frame Structure is located within 10 km from seismic source
Reference Loads
Seismic Definition (UBC 1997)
Load Cases Details
Wind Along X and Along Z
Actual Maximum Deflection = 9.8mm < L/240, 9.8mm < 17.08mm (PASS)
Maximum Moment and Shear Force
Max Moment is 128.528 KN-m (Use for Connection Design)
Max Shear Force is 87.314 KN (Use for Connection Design)
Maximum Axial Force of 237KN is acting at the innermost column.
Final Design Property of Column: Use HP12x74.
Depth = 300mm Base Flange Width = 300mm Thickness of Flange = 15mm
Thickness of Web = 15mm
Final Design Property of Steel Girder: Use W16x26.
Depth = 400mm Base Flange Width = 140mm Thickness of Flange = 8.8mm
Thickness of Web = 6.4mm
Final Design Property of Steel Roof Beams: Use W10x22.
Depth = 260mm Base Flange Width = 150mm Thickness of Flange = 9.1mm
Thickness of Web = 6.1mm
Final Design Property of Purlins:
Use C7x9.
Depth = 180mm Base Flange Width = 50mm Thickness of Flange = 10mm
Thickness of Web = 5mm
Maximum Axial Force of 271.84KN is acting at Interior Columns
