Determine the ultimate moment capacity of the beam in kN-m.

Steel Design (Activate Learning with these NEW titles from Engineering!)
6th Edition
ISBN:9781337094740
Author:Segui, William T.
Publisher:Segui, William T.
Chapter5: Beams
Section: Chapter Questions
Problem 5.6.3P
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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)
e
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
Thickness of web = 100 mm
fc' = 27.6 MPa
Determine the ultimate moment capacity of the beam in kN-m.
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) e 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 Thickness of web = 100 mm fc' = 27.6 MPa Determine the ultimate moment capacity of the beam in kN-m.
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