Determine the required stirrups spacing, in mm at the critical section Given: Width of the beam = 300mm Total depth = 600mm Clear concrete cover = 40mm f'c = 28 MPa fy = 275 MPa Ultimate Shear Force, Vu = 300 kN Main bar diameter = 28mm

A rectangular beam has b = 350 mm and d = 460 mm.the concrete compression strength is 30 MPa and the steelyield strength fy = 415 MPa. Calculate the required steelreinforcement area if the steel cover is 70 mm.use NSCP 2010 Md = 230 KN-mML = 160 KN-m

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The deep beam shown below supports a factored load of 1500 kips. Draw a truss model neglecting the effects of stirrups and the dead load of the wall. Check the strength of the nodes and structs and design the tension tie. Use 5 ksi normal-weight concrete and fy = 60 ksi. Consider the overall beam height of 12 ft and the effective depth is approximately 11 ft 32" 6 ft A B 1500 kips C 34 in 21 ft D 28"

See the image below. A hot-rolled l-beam section has yield strength fy = 300 MPa, ultimate strength fu = 320 MPa. b = 158 mm, t = 10 mm, H = 266 mm, tw = 13 mm. Calculate the nominal shear capacity of this section (in kN, round to whole number). b I H tw H

SITUATION A: The floor system shown has the following applied loads. Super Imposed Dead Load = 2.00 kPa Live Load = 1.90 kPa Slab Thickness = 100.00 mm Weight of Concrete = 24 kN/m3 Self-Weight of the beam = 1.92 kN/m Material Specifications: f’c = 21.00 MPa fy = 345.00 MPa Steel Cover = 50.00 mm   What is the maximum positive moment of beam BE, acting on the midspan? in kN-m What is the maximum steel ratio of the section located at the supports? What is the actual steel ratio of the beam section at the supports? What is the ultimate moment capacity of the beam at the supports? in kN-m What is the effective flange width at the midspan? in mm What is the height of the compression block of the section at midspan? in mm What is the ultimate moment capacity of the beam at the midspan? in kN-m What would be the height of the CHB that can be placed on beam BE? Assuming the weight of the blocks is 2.30 kN/m per meter height? in meters

Design the reinforcement of the section shown. For concrete, fc' = 21 MPa and for steel, fy = 275 MPa. Beam section has a width of 250 mm and a total depth of 500 mm. The steel cover is 70 mm. a. WD = 5 kN/m (including beam weight), WL = 6 kN/m b. WD = 2 kN/m (including beam weight), WL = 1 kN/m c. WD = 15 kN/m (including beam weight), WL = 26 kN/m

A reinforced concrete beam that is 375 mm wide and 500mm deep must resist a service live load moment of 250 kN-m and a service dead load moment of 150 kN-m. Use f'c-21 MPa and fy=415 MPa. The effective concrete cover is 65mm (to the centroid of reinforcements). 1. Determine the area of compression steel reinforcement (If required. Answer O if not) in mm² 2. Determine the minimum number of 25 mm diameter bars to be provided to satisfy the demand ultimate moment 3. Determine the maximum number of 25 mm diameter bars to be provided to have a tension controlled section Answer 1: 2403.21 correct answer: Answer 2: 9.00 Answer 3: 8.00

The beam section below has 4 #7 bars arranged in one row as shown below. The beam has normal- weight concrete with a compressive strength, f, equal to 4,000 psi, and the yield strength of the reinforcing steel is 60 ksi (Grade 60). 14 in. 3 in. 3 in. 164 #7 bars 21 in. 4 in. 15 in. 5 in. (a) Determine M₁, the nominal moment capacity of the beam. n (b) Consider that the section has four #9 tension bars instead of four #7. In addition, it has four #4 bars in the top flange. The centroid of the top bars is 2.5 in. from the top edge of the beam. Determine M₁, the nominal moment capacity of the beam, taking into account of the compression steel.