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- (Please Answer PROBLEM 102) PROBLEM 101:A continuous strip footing is to be located concentrically under a 300 mm wall that delivers service loadsD = 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 finalground surface. The soil has a density of 20Kn/m3and allowable bearing capacity of 280 Kn/m2. Materialsstrengths 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 ØPROBLEM 102:Referring to problem 101, design the footing considering the moments induce by the following loads given belowin addition to the service loads:MD = 50 Kn-m Use the following load combinations:ML = 60 Kn-m U= 1.2D + 1.6 LME = 36 Kn-M U = 1.2DL + 1.0L + 1.0Ea. The required width of footing,b. The required effective and total depths, based on shear,c. The required flexural steel area.d.…The thickness and reinforcement of a spread footing are governed by structuralconcerns. Structural design is governed by the LRFD method, which means theseanalyses are based on the factored loads.A 3 m square footing supports a vertical column load of 200 kN and two moment loads with axes parallel to the sides of the footing, each having a magnitude of 124 kN-m. The embed-ment of the footing is 1 m, and the groundwater table is at a great depth. Determine whether eccentric loading requirements will be met. If these requirements are not met, determine theminimum footing width, B, needed to satisfy these requirements.
- A 400 kN vertical downward column load acts at the centroid of a 1.5 m square footing. Thebottom of this footing is 0.4 m below the ground surface and the top is flush with the groundsurface. The groundwater table is at a depth of 3 m below the ground surface. Compute thebearing pressure.Q2: For the following spread footing, calculated the width of the footing if the footing length is 3.0m and the allowable bearing capacity was 126 kPa. 2a kN 33 kN. m 6 30 kN 1.5 nRedo Problem 16.13 with the following data: gross allowable load = 184,000 lb, = 121 lb/ft3, c = 0, =26, Df = 6.5 ft., and required factor of safety = 2.5. 16.13 A square footing (B B) must carry a gross allowable load of 1160 kN. The base of the footing is to be located at a depth of 2 m below the ground surface. If the required factor of safety is 4.5, determine the size of the footing. Use Terzaghis bearing capacity factors and assume general shear failure of soil. Given: = 17 kN/m3, c = 48 kN/m2, =31.
- Redo Problem 6.2 using the general bearing capacity equation [Eq. (6.28)]. A 5.0 ft wide square footing is placed at 3.0 ft depth within the ground where c = 200 lb/ft2, = 25, and = 115.0 lb/ft3. Determine the ultimate bearing capacity of the footing using Terzaghis bearing capacity equation and the bearing capacity factors from Table 6.1. What is the maximum column load that can be allowed with a factor of safety of 3.0?A 5 * 7 ft footing is founded at a depth of 2 ft and supports a vertical load of 80 k and a moment load of 30 ft-k in the B direction and 50 ft-k in the L direction. Determine the dimen-sions of the equivalent uniformly loaded footing and compute the equivalent bearing pressure.A footing is carrying a design column load of 22 k and a moment of 5 k-ft in one direction.The footing will be founded on sand at a depth of 2 ft. The water table is 3 ft below the groundsurface. Design the footing width for a square footing that will carry the design loads and meetthe presumptive allowable bearing pressure per the International Building Code.