2. The beam shown is prestressed using a bonded (stress relieved tendons) with a specified tensile strength of prestressing tendons fpu = 1350 MPa, a fc' = 35 MPa. The area of prestressed reinforcement in tension zone Aps = 1000 mm2. The specified yield strength of prestressing tendons fpy = 1160 %3D MPа. 0.85fc' a 430 NA. -- (d-a/2)

Structural Analysis
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Chapter2: Loads On Structures
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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.
Transcribed Image Text: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.
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