1. A simply supported rectangular concrete beam has a clear span of 6m has a width...
1. A simply supported rectangular concrete beam has a clear span of 6m has a width of 400mm and has an effective depth of 625mm. The beam supports a total factored load of 168kN/m which includes the weight of the beam. Use fc’=28MPa, fy=414MPa. Use normal weight of concrete with 1.0. Determine approximately the total number of stirrups needed for the beam.
2. A rectangular beam reinforced for tension only has b=200mm and d=350mm. The tension steel area provided is 7-25mm diameter bars with fy=415MPa and fc’=21MPa. Use NSCP 2010 Specifications. Calculate the ultimate moment capacity of the beam.
3. A short rectangular reinforced column is 375mm by 300mm. It is reinforced with 6-28mm bars. Use fc’=28MPa, fy=415MPa. Neglect the area of concrete displaced by compression steel bar. Determine the nominal load Pn if it is acting at an eccentricity of 300mm.
4.A rectangular beam has b=300mm, d=500mm, As= 6-32mm,
fc’=30MPa and fy=414MPa. Calculate the ultimate moment capacity of
the beam.
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1. A simply supported rectangular concrete beam has a
clear span of 6m has a width...
simply supported reinforced concrete beam of rectangular section is hung on the left end by a 400mm square post working in tension, as shown in the figure below. The beam supports a uniform dead l...
simply supported reinforced concrete beam of rectangular section is hung on the left end by a 400mm square post working in tension, as shown in the figure below. The beam supports a uniform dead load (DL) gf 100 KN/m (excluding its own weight) and upiform live load LL) of 40KN/m. The beam is reinforced with 025 longitudinal rebars with 40mm cleat cover to the stirrups. Material properties: fy 420 MPa, fe 25 MPa. Beam dimension b 400mm and h 600mm....
Design a reinforced concrete beam that has a rectangular cross section with a width b =...
Design a reinforced concrete beam that has a rectangular cross section with a width b = 24 in. The depth h is limited by architectural reasons to 16 in. It has to carry a factored moment Mu = 360 kip- ft. including the self-weight. The design should satisfy ACI 318 for tension controlled members. Use Grade 60 steel and a specified concrete compressive strength = 4,000 psi. Determine the flexural reinforcement for the beam, and use compression steel if needed....
A rectangular beam made using concrete of fc' = 6000 psi and steel with fy= 60...
A rectangular beam made using concrete of fc' = 6000 psi and steel with fy= 60 ksi. The beam has a width B=20 in and a total depth of 20 in with an effective depth d=17.5 in. The tensile steel consists of 4 #11 bars at the bottom side. a) Determine the maximum service load moment that can be resisted without stressing the concrete above 0.45fc' or the steel above 0.4fy. b) Calculate the nominal flexural moment capacity of the...
15 points 9. A rectangular concrete beam of width b=24 in. is limited by architectural considerations...
15 points 9. A rectangular concrete beam of width b=24 in. is limited by architectural considerations to a maximum total depth h=16 in. It must carry a total factored load moment Mu 400 k-ft. Design the flexural reinforcement for this member, using compression steel if necessary. Allow 3-in, to the center of the bars from the compression or tension face of the beam. Material strengths are fy=60 ksi and fc=4 ksi. Select reinforcement to provide the needed areas, complete necessary...
2.4 A rectangular reinforced concrete beam 300 x 550 mm (b x d) is provided with...
2.4 A rectangular reinforced concrete beam 300 x 550 mm (b x d) is provided with 4H20 bars as compression steel. Determine the area of tension steel needed for the beam to attain its full moment capacity. Calculate the corresponding ultimate moment of resistance. Assume fck = 30 N/mm2 and fyk = 500 N/mm2.
2. A rectangular beam, 400 x 600 mm gross dimension, is cast using a concrete strength...
2. A rectangular beam, 400 x 600 mm gross dimension, is cast using a concrete strength of fc 30 MPa, reinforced with 5-25 mm diameter steel bar at the effective depth of 500 mm. If is subjected to a moment, M 130 kN-m. Determine the following: Magnitude of the bending moment that cracks the singly-reinforced beam section. (10 pts) b. For the computed cracking moment, determine the maximum compressive stress in the concrete and the stress in the tension steel....
1.Design reinforcement for a rectangular R.C. beam 250mm wide simply supported over an effective span of...
1.Design reinforcement for a rectangular R.C. beam 250mm wide simply supported over an effective span of 4m loaded with service load of 50kN/m including self weight. 2.A simply supported rectangular beam 230mmX415mm (eff..) is subjected to a factored shear of 150kN. Find spacing of 8mm dia. 2 legged Fe 415 steel grade stirrups if beam is reinforced with 0.85% steel. Take M20 concrete grade.
A rectangular concrete beam measures 12 inches wide and has a depth of 26 inches. The...
A rectangular concrete beam measures 12 inches wide and has a depth of 26 inches. The centroid of the tension rebars is located 4 inches from the tension surface of the beam. Use fy = 60 ksi f’c = 3 ksi, compressive failure strain of concrete = 0.003. (A) Find the required tension rebars As to carry Mu = 5,700 kips-in. Show that the steel ratio does not meet the ACI requirements. (B) What can you do to meet ACI...
Problem 1 (50% 16.0 The normal weight reinforced concrete beam shown has a 15' cantilever span...
Problem 1 (50% 16.0 The normal weight reinforced concrete beam shown has a 15' cantilever span and the following properties fc 3000 psi fy - 40 ksi 18.0 6-10 bars (a) (10%) Determine the cracking moment of the beam. 24.0 Do not complete any code checks (min/max steel, min. beam width, etc.) 3.0
Problem 2 (25 points) A rectangular reinforced concrete beam has a width b-15 inches and effecti...
Problem 2 (25 points) A rectangular reinforced concrete beam has a width b-15 inches and effecti Concrete com ve depth d-24 inches. orcement fy- 60 ksi. imate load - 6 k/R pressive strength fe -4,000 psi and yield stress of steel reinf The beam is simply supported and subjected to a uniformly distributed ulti that includes the weight of the beam. Span is 28 feet. Assume interior exposure. s and show the proposed shear reinforcement Design the beam for shear...
simply supported reinforced concrete beam of rectangular section is hung on the left end by a 400mm square post working in tension, as shown in the figure below. The beam supports a uniform dead load (DL) gf 100 KN/m (excluding its own weight) and upiform live load LL) of 40KN/m. The beam is reinforced with 025 longitudinal rebars with 40mm cleat cover to the stirrups. Material properties: fy 420 MPa, fe 25 MPa. Beam dimension b 400mm and h 600mm....
15 points 9. A rectangular concrete beam of width b=24 in. is limited by architectural considerations to a maximum total depth h=16 in. It must carry a total factored load moment Mu 400 k-ft. Design the flexural reinforcement for this member, using compression steel if necessary. Allow 3-in, to the center of the bars from the compression or tension face of the beam. Material strengths are fy=60 ksi and fc=4 ksi. Select reinforcement to provide the needed areas, complete necessary...
2.4 A rectangular reinforced concrete beam 300 x 550 mm (b x d) is provided with 4H20 bars as compression steel. Determine the area of tension steel needed for the beam to attain its full moment capacity. Calculate the corresponding ultimate moment of resistance. Assume fck = 30 N/mm2 and fyk = 500 N/mm2.
2. A rectangular beam, 400 x 600 mm gross dimension, is cast using a concrete strength of fc 30 MPa, reinforced with 5-25 mm diameter steel bar at the effective depth of 500 mm. If is subjected to a moment, M 130 kN-m. Determine the following: Magnitude of the bending moment that cracks the singly-reinforced beam section. (10 pts) b. For the computed cracking moment, determine the maximum compressive stress in the concrete and the stress in the tension steel....
Problem 1 (50% 16.0 The normal weight reinforced concrete beam shown has a 15' cantilever span and the following properties fc 3000 psi fy - 40 ksi 18.0 6-10 bars (a) (10%) Determine the cracking moment of the beam. 24.0 Do not complete any code checks (min/max steel, min. beam width, etc.) 3.0
Problem 2 (25 points) A rectangular reinforced concrete beam has a width b-15 inches and effecti Concrete com ve depth d-24 inches. orcement fy- 60 ksi. imate load - 6 k/R pressive strength fe -4,000 psi and yield stress of steel reinf The beam is simply supported and subjected to a uniformly distributed ulti that includes the weight of the beam. Span is 28 feet. Assume interior exposure. s and show the proposed shear reinforcement Design the beam for shear...
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