2) Design an isolated footing to support a 100 x 40 cms column. The column loads are 150 tons D.L. and 100 tons L.L. Consider only reinforced concrete footing on foundation soil. • Foundation Soil: qall = 2.0 kg/cm², foundation level at depth 3.0m • Concrete: feu = 250 kg/cm² in footing, and 350 kg/cm² in column • Steel: 36/52 Column Reinforcement: 10 $ 22 Provide complete 1:20 detailing drawings for the designed footing.

2) Design an isolated footing to support a 100 x 40 cms column. The column loads are 150 tons D.L. and 100 tons L.L. Consider only reinforced concrete footing on foundation soil. • Foundation Soil: qall = 2.0 kg/cm², foundation level at depth 3.0m • Concrete: feu = 250 kg/cm² in footing, and 350 kg/cm² in column • Steel: 36/52 Column Reinforcement: 10 $ 22 Provide complete 1:20 detailing drawings for the designed footing.

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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Concept explainers

Design criteria for structural loading

The different loads such as loads due to self-weight (dead load) and external loads such as live load, wind loads, seismic load, snow load, and other loads and load combinations that influence the design of a building are called structural loading. The nature of the applied load differs from changes in the location, design, and type of materials used. The design criteria require that structures must be designed and constructed to be able to withstand all load types that are expected to act upon the structure and render its usage for the designated purpose. The structural members such as beams, slabs, columns, and foundations help the structure to withstand the applied load. There are different institutes such as ASCE and ACI that provide building design codes to assure minimum safety requirements and quality of the structures.

Question

2) Design an isolated footing to support a 100 x 40 cms column. The column loads
are 150 tons D.L. and 100 tons L.L. Consider only reinforced concrete footing on foundation
soil.
• Foundation Soil: qall = 2.0 kg/cm², foundation level at depth 3.0m
• Concrete: feu = 250 kg/cm² in footing, and 350 kg/cm² in column
• Steel: 36/52
Column Reinforcement: 10 22
Provide complete 1:20 detailing drawings for the designed footing.

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Step 1: Calculation of loads acting on the footing.

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Step 2: Determination of the required area of the footing

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Step 3: Check the punching shear of the footing

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Step 4: Design the reinforcement of the footing

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Foundation example
Design an isolated rectangular footing: P(dead load) = 225 kN P(live load) = 130 kN Qa = 180 kPa Df = 1.5 m Unit wt. of concrete = 23.5 kN/m^3 Unit wt. of soil =17.2 kN/m^3 Bar diameter = 20 mm f`c = 20.7 MPa fy = 248 MPa Width of footing, B is limited to 2m only Column = 40 cm x 40 cm Assume height of footing = 350 mm (check adequacy, if failed - increase the depth) Use min. cover = 75 mm Determine the following: (a) Effective Soil Bearing Pressure, Qe (b) Footing Dimension, L (c) Ultimate Soil Bearing Pressure, Qu (d) Check for Shear Criteria (Beam Shear) (e) Check for Shear Criteria (Punching Shear) (f) Required Steel Area (Long and Short Direction)
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