(Please Answer PROBLEM 102) PROBLEM 101: A continuous strip footing is to be located concentrically under a 300 mm wall that delivers service loads D = 360 kN/m and L= 220 kN/m to the top of the footing. The bottom of the footing will be 1.2 m below the final ground surface. The soil has a density of 20Kn/m3 and allowable bearing capacity of 280 Kn/m2 . Materials strengths are fc’ =21 MPa and fy = 276 MPa. Find: a. The required width of footing, b. The required effective and total depths, based on shear, c. The required flexural steel area. d. Give an on-scale schematic structural detail. ***Use 20 mm Ø PROBLEM 102: Referring to problem 101, design the footing considering the moments induce by the following loads given below in addition to the service loads: MD = 50 Kn-m Use the following load combinations: ML = 60 Kn-m U= 1.2D + 1.6 L ME = 36 Kn-M U = 1.2DL + 1.0L + 1.0E a. The required width of footing, b. The required effective and total depths, based on shear, c. The required flexural steel area. d. Give an on-scale schematic structural detail. ***Use 20 mm Ø
(Please Answer PROBLEM 102)
PROBLEM 101:
A continuous strip footing is to be located concentrically under a 300 mm wall that delivers service loads
D = 360 kN/m and L= 220 kN/m to the top of the footing. The bottom of the footing will be 1.2 m below the final
ground surface. The soil has a density of 20Kn/m3
and allowable bearing capacity of 280 Kn/m2
. Materials
strengths are fc’ =21 MPa and fy = 276 MPa. Find:
a. The required width of footing,
b. The required effective and total depths, based on shear,
c. The required flexural steel area.
d. Give an on-scale schematic structural detail.
***Use 20 mm Ø
PROBLEM 102:
Referring to problem 101, design the footing considering the moments induce by the following loads given below
in addition to the service loads:
MD = 50 Kn-m Use the following load combinations:
ML = 60 Kn-m U= 1.2D + 1.6 L
ME = 36 Kn-M U = 1.2DL + 1.0L + 1.0E
a. The required width of footing,
b. The required effective and total depths, based on shear,
c. The required flexural steel area.
d. Give an on-scale schematic structural detail.
***Use 20 mm Ø
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