Check the stability of concrete retaining wall shown in figure against sliding and bearing capacity. The hackfill consists of two layers having geotechnical properties as shown in table below.
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- Problem 8.3 Composite Areas Determine the x-coordinate and y-coordinate for the centre of gravity (G) of the concrete retaining wall pictured in the figure. 0.7 m 2.7 m- STRINGER PREDST CONNECTION 1.5 m NUTE PATR STANCHION 0.7 m Temesge 3.8 m HEEL TRANSVERSE "A" STRAKE 0.45 m LONGITUDINALA 150 mm clay reinforced masonry wall of vertical cell units has an effective high tensile steel area in tension of 0.000464 square meters, and a 28-day compressive strength of 8 MPa. In the space below, calculate the wall's rectangular compressive stress block depth. В I U X2 x2What will be the nature of surface of pipe if the flow of water is taking place having roughness size (k) = 0.10mm, yields an average shear stress at pipe boundary To 250N/m², take v = 10-6m²/sec A Hydrodynamically smooth B Hydrodynamically rough C In transition zone D Data insufficient II
- A concret wall with a thickness= The wall carries linear service lods PD and P₁: PD = 9 kips/ft PL = 15 kips/ft Assume a footing thickness= The wall footing is located 8.0 in. 18.0 in. 5.0 ft below ground. The soil unit weight = The concrete unit weight If the allowable soil pressure da The net effective soil pressure qn is most nearly: 18.0 in. 100 pcf 150 pcf 4000 psf Wall 8.0 in. B PD PL 5.0 ftStrength of Materials 5.4 Assuming a density of 120 #/ft.3 for masonry brick- work, determine the maximum height of a brick wall if the allowable compressive stress is limited to 150 #/in.² and the brick is (a) four inches wide and (b) six inches wide. 14 www WISS AK 4 THICK BRICK MASONRY WALL 2634. A 2.10m x 2.10m footing carries concentrically a square column 0.40m x 0.40m. Design data: Column factored loads: DL = 570KN = 460KN %3D Concrete cover to the centroid of footing reinforcement = 110mm Concrete f'c - 21MPA Steel fy= 415MPA %3D %3D Allowable stresses at ultimate loads: For diagonal tension or two-way action shear = 1.52MPA For wide-beam shear 0.78MPA Maximum steel ratio for moment = 0.016 a. What is the minimum thickness (mm) of footing required for punching shear? b. Determine the minimum thickness (mm) of footing required for wide beam shear. Determine the minimum thickness (mm) of footing required for maximum moment. C.
- If FA = 40 kN and FB = 35 kN, determine the magnitude of the resultant force and specify the location of its point of application (x, y) on the slab.Q3 Eor the solid slabs shown in Fig (3). find the spacing of (4 12 mm ) bars required at the locations and directions that idicated by the arrows? Assume - f =30 MPa . Fy =400 MPa Slab thickness = 150 mm Col 35+35 e o Al columas are square of 350 ma = 350 mm TANALYSIS AND DESIGN OF ONE-WAY SLABS: A slab that is 1.8 meters x 4 meters carries a superimposed dead load of 3.5 kPa and a live load of 5 kPa. Design Criteria: f'c = 28 MPa fy = 350 MPa tslab = 125mm unit weight of concrete = 23.54 kN/m³ Design the slab's reinforcement (main and temperature bars). 4 meters 1 m strip 1.8 meters
- 4. Show the differences between punching shear and beam shear. 5. List the rules to establish the axes of rotations and yield lines. 6. List three types of shear reinforcement in slab system. 7. According to the ACI code, define the column strip. 8. What is the purpose of limiting the minimum slab thickness in the ACI Code?In retaining walls, what happen when lateral soil pressure exceeds the weight of the wall (its slab + its heel)? Hint: the wall cross section is ideal with toe and shear key. wall overtunes wall slides wall develops excessive bearing oressureA footing supports a 200mm thick concrete wall. Wall loads: = 175 Dead Load kN/m = 89 Live Load kN/m = 20.6 Concrete, f'c MPа = 415 Steel, fy MPа %3D Unit weight = 23.6 of concrete kN/m3 Factored :1.2D %D load + 1.6L combination Thickness %3D of footing 350mm Steel Cover ( bottom of footing to centroid of 90mm bars) The gross allowable soil pressure is 100 kPa and width of the wall is 200mm. Assume that the top of the footing is at the ground level. A) What should be the width (m) of the footing so that the allowable soil pressure will not be exceeded? (Dimensions in multiples of 50mm) B) Check the adequacy of the footing for Beam Shear considering 1m strip C) Calculate the required spacing reinforcements for diameter 16mm main bars and 10mm shrinkage and temperature bars.