H.W No.1: A pretension beam with variable eccentricity has a rectangular of 200 mm width and 500 mm depth fc'=28 MPa, fci'=21 MPa, R=0.8. Use allowable stresses: a- Find the initial prestress force. b- What uniformly distributed load can be carried on 12 m simple span? c- Find the max. permissible eccentricity of the prestress tendons at 1/4 of the span to satisfy service allowable stress limits. d- Find the steel area and no. of strands required use 12.7 mm 7-wire strand, fpy=1489 MPa. e- Check stresses at midspan, assume all live load sustained.
H.W No.1: A pretension beam with variable eccentricity has a rectangular of 200 mm width and 500 mm depth fc'=28 MPa, fci'=21 MPa, R=0.8. Use allowable stresses: a- Find the initial prestress force. b- What uniformly distributed load can be carried on 12 m simple span? c- Find the max. permissible eccentricity of the prestress tendons at 1/4 of the span to satisfy service allowable stress limits. d- Find the steel area and no. of strands required use 12.7 mm 7-wire strand, fpy=1489 MPa. e- Check stresses at midspan, assume all live load sustained.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Question
![H.W No.1: A pretension beam with variable eccentricity has a rectangular of
200 mm width and 500 mm depth fc'=28 MPa, fci'=21 MPa, R=0.8. Use
allowable stresses:
a- Find the initial prestress force.
b- What uniformly distributed load can be carried on 12 m simple span?
c- Find the max. permissible eccentricity of the prestress tendons at 1/4 of
the span to satisfy service allowable stress limits.
d- Find the steel area and no. of strands required use 12.7 mm 7-wire strand,
fpy=1489 MPa.
e- Check stresses at midspan, assume all live load sustained.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F0e83790e-6838-4091-8354-cb9a02d0208e%2Faeb92459-07eb-400c-b14d-0862edcc70bc%2Fl6ggqcj_processed.jpeg&w=3840&q=75)
Transcribed Image Text:H.W No.1: A pretension beam with variable eccentricity has a rectangular of
200 mm width and 500 mm depth fc'=28 MPa, fci'=21 MPa, R=0.8. Use
allowable stresses:
a- Find the initial prestress force.
b- What uniformly distributed load can be carried on 12 m simple span?
c- Find the max. permissible eccentricity of the prestress tendons at 1/4 of
the span to satisfy service allowable stress limits.
d- Find the steel area and no. of strands required use 12.7 mm 7-wire strand,
fpy=1489 MPa.
e- Check stresses at midspan, assume all live load sustained.
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