column base design
DESCRIPTION
Column Base plate design base on Britist code. this is the calculation onlyTRANSCRIPT
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1
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Date
30/8/2013
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COLUMN BASE PLATE DESIGN (BS5950)
COLUMN BASE PLATE DESIGN (BS5950-1:2000)
TEDDS calculation version 1.0.08;
Column section details
Baseplate reference;
Column section; I 305x305x96.9
Column depth; D = 307.9 mm
Column breadth; B = 305.3 mm
Flange thickness; T = 15.4 mm
Web thickness; t = 9.9 mm
Material details
Steel plate design strength; pyp = 275 N/mm2
Characteristic strength of concrete; fcu = 25 N/mm2
Loading details
Design axial compression in column (ULS); Fc = 320.0 kN
Design shear force (ULS); Fv = 20.0 kN
Calculate effective area of base plate
Pressure under base plate; w = 0.6 fcu = 15.0 N/mm2
Required bearing area; Areq = Fc / (0.6 fcu) = 213.3 cm2
; c = 5.0 mm
Minimum recommended plate size; Dp_min = D + 2 c = 317.9 mm
Bp_min = B + 2 c = 315.3 mm
Minimum acceptable plate thickness; tp_min = c (3 w / pyp)0.5 = 2.0 mm
Specified plate size; Dp = 350 mm
Bp = 350 mm
Specified plate thickness; tp = 12.5 mm;
Warning - specified thickness less than section flange thickness
Recalculate c; cactual = tp / (3 w / pyp)0.5 = 30.9 mm
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Project
Job Ref.
Section
Sheet no./rev.
2
Calc. by
P
Date
30/8/2013
Chk'd by
Date
App'd by
Date
Effective area; Aeff = 625.8 cm2
Base Plate is OK
Effective base plate dimensions for concrete base design
Length of loaded area (parallel to flanges); bcx = min(B + 2 cactual, Bp) = 350 mm
Width of loaded area (parallel to web); bcy = min(D + 2 cactual, Dp) = 350 mm
BS 5950-1:2000:Clause 4.13.2
Shear transfer to concrete
Assumed coefficient of friction; = 0.30
Available shear resistance; Pv = Fc = ;96; kN
PASS - Frictional shear capacity is adequate (0.208)