Design of a slender column in a nonsway frame. Figure 9.14 shows an elevation view of amultistory concrete frame building, with 1200 mm wide x 300 mm deep beams on all columnlines, carrying two-way slab floors and roof. The clear height of the columns is 3.95 m. Interiorcolumns are tentatively dimensioned at 450 x 450 mm, and exterior columns at 400 x 400 mm.The frame is effectively braced against sway by stair and elevator shafts having concrete wallsthat are monolithic with the floors, located in the building corners (not shown in the figure).The structure will be subjected to vertical dead and live loads. Trial calculations by first-orderanalysis indicate that the pattern of live loading shown in Fig. 9.14, with full load distributionon roof and upper floors and a checkerboard pattern adjacent to column C3, produces maxi-mum moments with single curvature in that column, at nearly maximum axial load. Dead loadsact on all spans. Service load values of dead and live load axial force and moments for thetypical interior column C3 are as follows:Dead loadP = 990 KNM₂ = 3 kN-mM₁ = -3 kN-mLive loadP = 745 KNM₂ 146 kN-mM₁ = 135 kN-mThe column is subjected to double curvature under dead load alone and single curvature underlive load.Design column C3, using the ACI moment magnifier method. Use f= 28 MPa andf, = 420 MPa.6 stories at 4.25 m - 25.5 m65432OVERHOUDING MENYEBAY ARTEGO AKIMISE AEVERJAARSONIER17777ABColumn C3KONEEN LEDEN7777DC5 bays at 7.3 m - 36.5 m7777E7777F

Since the reinforcing has not been selected we have EI = 0.4*Ec*Ig1+βd Ec = Elastic modulus of…

Answered: Design column C3, using the ACI moment…

Engineering

Civil Engineering

Design column C3, using the ACI moment magnifier method. Use f f = 420 MPa. 28 MPa and

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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