Determine the value of the stress in the prestressed reinforcement at nominal strength. (MPa)

Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
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The prestressed I beam shown in cross section is pre tensioned using seven ordinary strands grade
250 (fpu = 1728 MPa) carrying an effective prestress fpe = 988 MPa, fpy =1480 MPa.
%3D
300
0.85fc'
150 a
300
440
600
(d-a2)
300
T=Aps fps
Aps =650 mm2
Total depth of beam = 600 mm
Distance from center to tendons to the top of the beam = 440 mm
Aps = 650 mm²
%3D
Average flange thickness = 150 mm
Width of flange = 300 mm
%3D
Thickness of web = 100 mm
%3D
fc' = 27.6 MPa
Determine the value of the stress in the prestressed reinforcement at nominal strength. (MPa)
Transcribed Image Text:The prestressed I beam shown in cross section is pre tensioned using seven ordinary strands grade 250 (fpu = 1728 MPa) carrying an effective prestress fpe = 988 MPa, fpy =1480 MPa. %3D 300 0.85fc' 150 a 300 440 600 (d-a2) 300 T=Aps fps Aps =650 mm2 Total depth of beam = 600 mm Distance from center to tendons to the top of the beam = 440 mm Aps = 650 mm² %3D Average flange thickness = 150 mm Width of flange = 300 mm %3D Thickness of web = 100 mm %3D fc' = 27.6 MPa Determine the value of the stress in the prestressed reinforcement at nominal strength. (MPa)
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