Question

In
attempting to derive a rule of thumb for the thickness of a wall
footing, it can be shown that h = a Pu-b, where h = required
thickness of wall footing in mm, Pu = ultimate load in kN/m. If the
allowable bearing capacity of soil = 248 kN/m2, f'c =28 MPa and
average load factor = 1.37, determine the factor a in the above
rule of thumb.

Answer #1

Design a wall footing to support a 300 mm reinforced concrete
wall with dead load of 292KN/m and live load of 200 KN/m. The
bottom of the footing is 1.20 m below the final grade, the soil
weighs 15,700 N/m3. The allowable soil pressure is 190 Kpa. fy =
276.5 Mpa, fc’ = 27.6 Mpa.

A wall is supported on a 1.0 m wide strip footing located 1.5 m
below the ground surface. The surrounding soil has a dry unit
weight of 17.5 kN/m3, a saturated unit weight of 19.0 kN/m3,
cohesion of 8 kPa and angle of internal friction of 26°.
Groundwater was located 2m below ground surface. Using a factor of
safety of 3, determine the allowable bearing capacity if a) the
footing is considered infinitely long, and b) the footing is 8...

A one-way solid slab of a span of 3000 mm and a total thickness,
h, of 150 mm is subjected to a service L.L. of
9.58 kN/m2. The concrete compressive strength,
f'c , is 20.7 MPa, the steel yielding strength,
fy , is 414 MPa, the total cover of steel is 30
mm, minimum reinforcement ratio is ρmin =
0.0033, maximum reinforcement ratio is
ρmax = 0.0135, and density of concrete
γc = 24 kN/m3. What is the required
area of...

Repeat problem 8.2 using Schmertmann’s method, compute the
settlement of this footing att = 50 years. (divide the soil into 6
layers, 3 ft thickness for each layer)
8.2) A 250-k column load is to be supported on a 9 ft square
footing embedded 2 ft below the ground surface. The underlying soil
is a silty sand with an average N60 of 32 and a unit weight of 129
lb/ft3. The groundwater table is at a depth of 35 ft....

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 3 minutes ago

asked 21 minutes ago

asked 28 minutes ago

asked 31 minutes ago

asked 33 minutes ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 2 hours ago