The inclined columns support the entire weight of the building and provide. Reinforcement required about the X-X axis: From the design chart, Asc = 1131 = 0. Slimdek consists of asymmetric steel beams (ASB) support a deep composite slab. Reinforcement required about the Y-Y axis: From the design chart, Asc = 3804 = 1.35% Through inspection: The critical section lies at the top end of the column. Moment distribution along the height of the column for bending about the Y-Y: At the top, My = 500.0 kNm Near mid-height, My = 200.0 kNm At the bottom, My = 500.0 kNm Moments about Y-Y axis( kNm)Ĭheck for miminum eccentricity: Check that the eccentricity excceeds the minimum in the plane of bending: Use emin = 20mm Mmin = 39.0 kNm about the Y-Y axis. The column is bent in double curvature about the Y-Y axis: M1 = Smaller initial end moment = 500.0 kNm M2 = Larger initial end moment = 500.0 kNm The initial moment near mid-height of the column : Mi = -0.4M1 + 0.6M2 0.4M2 = 500.0 kNmĭesign ultimate load and moment: Design axial load: Pu = 1950.0 kN The initial end moments about the X-X axis: M1 = Smaller initial end moment = 0.0 kNm M2 = Larger initial end moment = 0.0 kNm The initial moment near mid-height of the column : Mi = -0.4M1 + 0.6M2 0.4M2 = 0.0 kNm y = 1.20Įffective column height: lex = x Lo = 3.600 m ley = y Lo = 3.600 mĬheck if the column is slender: lex/dia = 6.0 < 10 ley/dia = 6.0 < 10 The column is short. At the bottom end: Condition 1 (fully fixed). x = 1.20Įnd fixity and bracing for bending about the Y-Y axis: At the top end: Condition 1 (fully fixed). Through inspection: Load case 2 (Compression) is critical.Įnd fixity and bracing for bending about the X-X axis: At the top end: Condition 1 (fully fixed). (6) The critical load case is identified as the case yielding the largest steel area about the design axis. (5) The procedure is repeated for each load case. (4) The area steel perpendicular to the design axis is read from the relevant design chart. (3) The steel required for the design axial force and moment is read from the relevant design chart. (2) The design axis and design ultimate moment is determined. The column is designed using the following procedure: (1) The column design charts are constructed. (4) The design axial loads are taken constant over the height of the column. (3) The specified design axial loads include the self-weight of the column.
(2) The section is symmetrically reinforced.
#Prokon column design code
Station 13 - 600mm Type 2P2 Design code : BS8110 - 1997Īssumptions: (1) The general conditions of clause 3.8.1 are applicable.
#Prokon column design software
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