A combined footing is proposed to support two columns, C1 and C2, with loads equal to 2000 kN and 3000 kN, respectively. The column C1 has dimensions equal to 25x50 cm and C2 has dimensions 25x75 cm, while the spacing between the two columns is 5 meters. The footing is to be founded in a silty sand soil layer with the following engineering properties: y = IN m 20 kDo Th able is

Structural Analysis
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Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
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Footing

A combined footing is proposed to support two columns, C1
and C2, with loads equal to 2000 kN and 3000 kN, respectively.
The column C1 has dimensions equal to 25x50 cm and C2 has
dimensions 25x75 cm, while the spacing between the two
columns is 5 meters. The footing is to be founded in a silty
sand soil layer with the following engineering properties: y =
18.2 kN/m3; § = 330 and c = 30 kPa. The groundwater table is
very deep, while the foundation level is 2.1 m from the ground
surface, tp.c. (thickness of plane concrete) = 10 cm, fcu = 25
MPa, and the factor of safety against bearing capacity failure is
equal to 5.0. It is required to do the following: (i). calculate the
soil bearing capacity (limit to 2.0 kg/cm2 if exceed this value)
(ii). determine the footing dimensions (iii). design the footing
for flexure (iv). check shear and punching (v). sketch the
required steel reinforcement
Transcribed Image Text:A combined footing is proposed to support two columns, C1 and C2, with loads equal to 2000 kN and 3000 kN, respectively. The column C1 has dimensions equal to 25x50 cm and C2 has dimensions 25x75 cm, while the spacing between the two columns is 5 meters. The footing is to be founded in a silty sand soil layer with the following engineering properties: y = 18.2 kN/m3; § = 330 and c = 30 kPa. The groundwater table is very deep, while the foundation level is 2.1 m from the ground surface, tp.c. (thickness of plane concrete) = 10 cm, fcu = 25 MPa, and the factor of safety against bearing capacity failure is equal to 5.0. It is required to do the following: (i). calculate the soil bearing capacity (limit to 2.0 kg/cm2 if exceed this value) (ii). determine the footing dimensions (iii). design the footing for flexure (iv). check shear and punching (v). sketch the required steel reinforcement
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