T0.3 ine the maximum live load that can be applied on one way slab shown in Fig. (1). The slab is reinforced with main reinforcement of $12 @ 150 mm at top and bottom f = 25 MPa, f, = 400 MPa , 3m 03 Wa = slab weight + 40mm tiling 3m !3! Slabthickness =180 mm All columns = 300 * 300 mm 7m %3D 0.3 Fig (1) All beams = 300 * 600 mm --- %3D

T0.3 ine the maximum live load that can be applied on one way slab shown in Fig. (1). The slab is reinforced with main reinforcement of $12 @ 150 mm at top and bottom f = 25 MPa, f, = 400 MPa , 3m 03 Wa = slab weight + 40mm tiling 3m !3! Slabthickness =180 mm All columns = 300 * 300 mm 7m %3D 0.3 Fig (1) All beams = 300 * 600 mm --- %3D

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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1. The prestressed beam is pre tensioned by a bonded prestress tendon having an area Aps - 650 mm?. fpu = 1728 MPa fpe - 988 MPa fpy - 1486 MPa fc' = 27.6 MPa 300 mm |120 400 mm 600 mm Aps 120 100 a. Find the value of the stress in prestressing reinforcement at nominal length. b. What is the design moment strength of the beam c. Is the beam over or under reinforced.
2. The beam shown is prestressed using a bonded (stress relieved tendons) with a specified tensile strength of prestressing tendons fpu = 1350 MPa, and fc' = 35 MPa. The area prestressed reinforcement in tension zone Aps = 1000 mm?. The specified yield strength of prestressing tendons fpy = 1160 MPa. 0.85fc' C a 430 (d-a/2) Ap=1000 T=ApsSps 250 a. Determine the value of the stress in prestressed reinforcement at nominal strength. b. Determine the value of the depth of the compression block. c. Which of the following gives the ultimate moment capacity of the prestressed beam.
2. The beam shown is prestressed using a bonded (stress relieved tendons) with a specified tensile strength of prestressing tendons fpu = 1350 MPa, and fc' = 35 MPa. The area of prestressed reinforcement in tension zone Aps = 1000 mm2. The specified yield strength of prestressing tendons fpy =1160 MPa. %3D %3D ру 0.85fc' a 430 N.A. |(d-a/2) A=1000 T=Apsfps 250 a. Determine the value of the stress in prestressed reinforcement at nominal strength. b. Determine the value of the depth of the compression block. c. Which of the following gives the ultimate moment capacity of the prestressed beam.
Situation 17: A rectangular beam has a width of 300mm and an effective depth to the centroid of the tension reinforcement of 600mm. The tension reinforcement has an area of 4762mm2 and the area of compression reinforcement placed 62.5mm from the compression face of the beam is 987.5mm2 fy=414.6 MPa, fc’=34.56 MPa. Balanced steel ratio is 0.034. Assume that steel yields. Determine the depth of compression block. Determine the design strength. Determine the concentrated live loads at the midspan in addition to a dead load of 20kN/m including the weight of the beam if it has a span of 6m.
For the slab shown in figure. Determine the steel reinforcement in the short direction for the continuous edge. LL-6 kN/m2. Use f'c-28 MPa, fy = 420 MPa 0.3 4.2 m 0.3 0.3 Ø12 @150 mm Ø12 @120 mm Ø12 @140 mm Ø10 @140 mm 6.0 m * A 0.3
1. The prestressed beam is pre tensioned by a bonded prestress tendon having an area Aps = 650 mm2. fpu = 1728 MPa fpe = 988 MPa %3D fpy = 1486 MPa fc' = 27.6 MPa 300 mm |120 400 mm 600 mm 120 100 a. Find the value of the stress in prestressing reinforcement at nominal length. b. What is the design moment strength of the beam c. Is the beam over or under reinforced.
2. The beam shown is prestressed using a bonded (stress relieved tendons) with a specified tensile strength of prestressing tendons fpy = 1350 MPa, and fc' = 35 MPa. The area of prestressed reinforcement in tension zone Aps = 1000 mm². The specified yield strength of prestressing tendons fpy = 1160 MPa. 0.85fc' C a 430 N.A. |(d-a/2) Ap=1000 T=Ap,Sps 250 a. Determine the value of the stress in prestressed reinforcement at nominal strength. b. Determine the value of the depth of the compression block. c. Which of the following gives the ultimate moment capacity of the prestressed beam.
A beam has a flange width of 810mm and a slab thickness of 50mm. The width of the web section is 300mm and it has an effective depth of 550mm. It is reinforced at the bottom with a steel area of 1750mm2. fc’ = 20MPa, fy = 400MPa. The magnitude of the compressive force of concrete is ____kN
A reinforced concrete beam has a width of 300 mm and effective depth of 500mm to the centroid of the tension reinforcements. Consider the steel reinforcements will be placed in a single layer arrangement. Concrete strength fc’ = 34.5 MPa. Determine the steel ratio of the section if the beam is singly reinforced with the maximum amount of steel for transition control allowed by the Code if the bars has a steel strength of fy = 345 MPa. Determine the steel ratio of the section if the beam is singly reinforced with the maximum amount of steel for tension control if the bars has a steel strength fy = 345 MPa. Determine the number of pieces of 28 mm ᴓ bars required for the section if the beam is singly reinforced with the maximum amount of steel for tension control if the bars has a steel strength fy = 415 MPa.
A prestressed T beam shown which is reinforced with a bonded tendon having an area Aps = 1580 mm2, fc' = 34.5 MPa, fpu = 1862 MPa, and the effective stress after losses fse = 1102 MPa, fpy = %3D %3D %3D 1713 MPa. Span of the beam is 6 m. 1220 mm 0.85 fc' a 80. NA. 600 d-a/2 Aps 60 T=Aps fps 250 Determine the value of the stress in prestressed reinforcement at nominal strength (fps, MPa).
A prestressed T beam shown which is reinforced with a bonded tendon having an area Aps = 1580 mm?, fc' = 34.5 MPa, fpu = 1862 MPa, and the effective stress after losses fse = 1102 MPa, fpy = %3D %3D %3D %3D 1713 MPa. Span of the beam is 6 m. 0.85 fc' C 1220 mm 80 a N.A. 600 d-a/2 Aps 60 T=Aps fps 250 Find the ultimate moment strength capacity of the beam. (kN.m)
Q.1 Determine the short and long term camber of 8ST36 having a span of 75 feet with only self weight acting. Assuming concstant eccentress of pre-stressing reinforcement. The self-weight of beam can be taken at 594 lbs/ft.Assue creep co-efficient equal to 2.5 and free shrinkage sstrein of -0.40x10-³ in/in. Initial jacking stress may be 0.75 FPU.Fc' may be taken as 5000 psi and that at transfer at 3500 psi. The beam has 14, ½ low relaxation strands.what can be the deflection if superimposed DL is 60 psf?