Q3 A reinforced concrete footing carries two 400mm x 400mm columns centered 2m apart and symmetrically arranged on a 4m x 2m x 500mm thick base. The base has been constructed with C25/30 concrete and H20-300 bars in both directions on the bottom face with d=450mm to the lowest longitudinal bars. A proposed change in building use will now impose increased ULS column loads of 2000kN each (4000kN total) on the combined base. Plot the longitudinal SFD and BMD for the combined footing. (a) (b) (c) [5] Confirm that the concrete footing can withstand the new longitudinal bending. Confirm that the concrete footing can also withstand the transverse bending.

Q3 A reinforced concrete footing carries two 400mm x 400mm columns centered 2m apart and symmetrically arranged on a 4m x 2m x 500mm thick base. The base has been constructed with C25/30 concrete and H20-300 bars in both directions on the bottom face with d=450mm to the lowest longitudinal bars. A proposed change in building use will now impose increased ULS column loads of 2000kN each (4000kN total) on the combined base. Plot the longitudinal SFD and BMD for the combined footing. (a) (b) (c) [5] Confirm that the concrete footing can withstand the new longitudinal bending. Confirm that the concrete footing can also withstand the transverse bending.

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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