SITUATION 3 - Design of Rectangular Combined Footing: A set two column loads which are 2.5 m apart on its center will share a foundation. The said footing will resist NO SURCHARGE. Column 1 (400 x 400 mm) D = 320 kN L = 350 kN Column 2 (400 x 400 mm) D=520 kN L = 570 KN The 400 mm side of Column 1 is along a property line. The columns are aligned into a straight line. The footing is placed 1.8 m below the NGL. Use the strength of concrete as 21 MPa and steel yield strength of 345 MPa. Use 16 mm diameter for the main reinforcement. Use unit weight of soil and concrete as 18.0 kN/m³ and 23.6 kN/m³, respectively. The allowable soil bearing capacity is 140 kPa. Use the initial thickness of 650 mm. A. Determine the effective soil pressure B. Determine the size of the footing C. Determine the ultimate soil pressure D. Investigate if the thickness is adequate against one-way shear and two-way shear E. Determine the design moment of the footing. DISREGARD the evaluation of item (D). Draw the shear and moment diagram F. Determine the number of bars each way.

SITUATION 3 - Design of Rectangular Combined Footing: A set two column loads which are 2.5 m apart on its center will share a foundation. The said footing will resist NO SURCHARGE. Column 1 (400 x 400 mm) D = 320 kN L = 350 kN Column 2 (400 x 400 mm) D=520 kN L = 570 KN The 400 mm side of Column 1 is along a property line. The columns are aligned into a straight line. The footing is placed 1.8 m below the NGL. Use the strength of concrete as 21 MPa and steel yield strength of 345 MPa. Use 16 mm diameter for the main reinforcement. Use unit weight of soil and concrete as 18.0 kN/m³ and 23.6 kN/m³, respectively. The allowable soil bearing capacity is 140 kPa. Use the initial thickness of 650 mm. A. Determine the effective soil pressure B. Determine the size of the footing C. Determine the ultimate soil pressure D. Investigate if the thickness is adequate against one-way shear and two-way shear E. Determine the design moment of the footing. DISREGARD the evaluation of item (D). Draw the shear and moment diagram F. Determine the number of bars each way.

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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