Question: Q 1 ) ( 3 3 % ) A continuous footing is planned to be constructed for a load - bearing wall ( shear wall

Q1)(33%)
A continuous footing is planned to be constructed for a load-bearing wall (shear wall). The
width of the wall is 30.5cm, the wall carries 219kNm vertical force, including the weight of
the wall. The base of the footing will be located at a depth of 1m below the ground surface.
There is no ground water table. The wall and the footing will be made of reinforced concrete
having unit weight of 23.6kNm3. Generally, the footing thickness of 1 to 1.5 times the wall
thickness will be adequate. Soil above and below the footing has unit weight of 15.7kNm3.
The wall will also carry a lateral force due to wind (33.5kNm), which is acting at 0.3m above
the ground level, on the wall. The soil at the site has the following CPT data, you may need to
obtain soil parameters using the CPT data given.
a) Design a footing for the load-bearing wall (i.e. determine the width and the thickness of
the continuous footing), such that (1) the allowable bearing capacity (using F.S.3.0) is
not exceeded, (2) max. allowable immediate settlement value, 60mm, is not exceeded,
(3) the minimum base pressure under the footing is greater than or equal to zero. For
immediate settlement calculations use Schmertmann's method, and consider t=1 months
after construction finishes; use Young's modulus =3 x Cone Tip Resistance; ignore
consolidation settlement if there is any. You may use trial and error method to design
the footing. If you use this method, show your trial calculations.
b) For the footing dimension you found in part (a), draw shear force and bending moment
diagrams.
Q 1 ) ( 3 3 % ) A continuous footing is planned

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