A normal weight, concrete Beam has the following properties: b = 15", d = 21", h = 24", f'c = 5000 psi. What is the location of the critical shear we use to design the stirrups spacing? 21" from the support At the support 24" from the support 15" from the support
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- 4.17. A rectangular beam made using concrete with f c ′ = 6000 psi and steel with f y = 60,000 psi has a width b = 20 in., an effective depth of d = 17.5 in., and a total depth of h = 20 in. The concrete modulus of rupture f r = 530 psi. The elastic moduli of the concrete and steel are, respectively, E c = 4,030,000 psi and E s = 29,000,000 psi. The tensile steel consists of four No. 11 (No. 36) bars. ( a ) Find the maximum service load moment that can be resisted without stressing the concrete above 0 .45 f c′ or the steel above 0.40 f y . ( b ) Determine whether the beam will crack before reaching the service load. ( c ) Compute the nominal flexural strength of the beam. ( d ) Compute the ratio of the nominal flexural strength of the beam to the maximum service load moment, and compare your findings to the ACI load factors and strength reduction factor.A beam cast monolithically with the slab thickness of 110 has a span of 4 m spaced at 6 m center to center. The width of the web is 300 mm and effective depth of 500 mm. It is reinforced on the tension side with 8-20 mm Φ rebars. Fc’ = 30 MPa fy = 310 MPa 1. Which gives the effective width of flange? a. 2000 mm b. 1500 mm c. 2500 mm d. 1000 mm 2. Which gives the depth of the compression stress block? a. 30.55 mm b. 32.56 mm c. 12.45 mm d. 42.14 mmAbout Uncracked and Craked Section 1. A doubly reinforced beam has dimension of 300mmw x 600mmh. It is reinforced with 2-25mm diam compression bars and 4 25mm diam tension bars. Concrete cover from centroid of steel bar is 60mm. On its section has a bending moment of 300KN-m. Using working stress design method what are the stresses acting on the concrete, compressive and tensile steel bars? used n: 8
- The overhanging beam shown supports the given ultimate load Wu= 5okN/m. The section is 300mm by 500mm rectangular beam having f'c=35MPa, fy=420 MPa, stirrups diameter = 10mm and concrete cover 40mm. a.) Calculate the vertical reaction at B in kN b.) Calcute the vertical reaction D in kN c.) Calculate the area of steel reinforcement corresponding to rho max in mm^2. d.) Calculate the location of the point of zero shear in the beam measured from the left support B in mm. e.) Calculate the maximum positive moment in the beam in kN.m.sA simply supported concrete beam 6m long is reinforce with four-28 mm diamgram tension bars. The beam has a width of 300mm and over all depth of 400.the steel covering to the centroid of the renforcement is 70 mm fc=30mpa and fy 418mpa A .draw a stress diagram B.compute for the ultimate capacity of the beam5. A rectangular beam 350 mm wide is to be designed for an ultimate moment of 750 kN·m with f’c = 28 MPa and fy = 415 MPa. The effective depth of the tension bars is 500 mm and 70 mm for compression bars. a. Determine the depth of the stress block if the tensile strain is 0.005 when the concrete crushes at a strain of 0.003. = ____ mm (one decimal place) b. Determine the total amount of tension reinforcement for the given condition above. = ___ sq.mm (whole number) c. Determine the amount of compression reinforcement required. = ___ sq.mm (whole number)
- The simply supported wood beam carries a uniformly distributed load of w = 700 lb/ft, where LAB= 8.0 ft and LBC = 16.0 ft. The beam cross-sectional dimensions are b = 6.2 in., d = 20.4 in., yH = 5.6 in., and yK = 8.0 in. Section a–a is located at x = 4.0 ft from A.(a) At section a–a, determine the magnitude of the shear stress in the beam at point H.(b) At section a–a, determine the magnitude of the shear stress in the beam at point K.(c) If the allowable shear stress for the wood is 140 psi, what is the largest distributed load w that can be supported by the beam? Draw a horizontal line through point H. Use the area above this line to calculate the first moment of area associated with point H.Answer:QH = in.3Let the allowable stresses in the post be ??? = 120 ??? and ??? = 6 ???. Compute the maximum safe axial load P that may be applied. The moduli of elasticity are 200 GPa for steel and 14 GPa for concrete. Each steel bar has cross-sectional area of 900??2A reinforced concrete beam, b by h with tensile reinforcement of 6-25mm diameter bars is simply supported on a clear span of 12m. Given: fc = 12 MPa fs = 140 Mpa wc = 24 kN/m3 n = 12 b = 331 mm h = 602 mm d = 582 mm determine the ff. 1. Compute the moment capacity of concrete in kN-m. 2. Compute the moment capacity of steel in kN-m. 3. Aside from the uniformly distributed self-weight of the reinforced concrete, what will be the maximum two equal concentrated loads it can carry that will be located at its third points in kN?
- A rectangular beam has a width of 300mm and an effective depth of 537.50 mm to the centroid of tension steel bars. Tension reinforcement consists of 6 – 28mm dia in two rows, compression reinforcement consists of 2 – 22mm dia, fc’ = 27.6MPa, fy = 414.7MPa, d’ = 60mm, L = 4m, the Unit weight of concrete is 24.56kN/cu.m 1. Determine the depth of concrete stress block 2. Determine the ultimate moment capacity of the beamA reinforced concrete beam, b by h with tensile reinforcement of 6-25mm diameter bars is simply supported on a clear span of 12m. Given: fc = 12 MPa fs = 140 Mpa wc = 24 kN/m3 n = 12 b = 331 mm h = 602 mm d = 582 mm determine the ff. 1. What is the distance from the top fiber of the beam to the neutral axis in mm? 2. What is the gross moment of inertia of the section in mm4? 3. Compute the moment capacity of concrete in kN-m. 4. Compute the moment capacity of steel in kN-m. 5. Aside from the uniformly distributed self-weight of the reinforced concrete, what will be the maximum two equal concentrated loads it can carry that will be located at its third points in kN? pls solve completelyCalculate the stresses in members AB, DF, and BD. Given:FAB = 51.22 kN (C)FDF = 50 kN (C)FBD = 32.98 kN (C)d = 0.05 m