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A prestressed concrete rectangular beam has a width = 400 mm and a depth 900 mm. It is simply supported over a span length of 12m. The beam is subjected to a prestressing force of 2000 KN using a parabolic cable profile

A prestressed concrete rectangular beam has a width = 400 mm and a depth 900 mm. It is simply supported over a span length of 12m. The beam is subjected to a prestressing force of 2000 KN using a parabolic cable profile

Structural Analysis
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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A prestressed concrete rectangular beam has a width = 400 mm and a depth 900 mm. It is simply supported over a span length of 12m. The beam is subjected to a prestressing force of 2000 KN using a parabolic cable profile having an eccentricity of 240 mm at mid span and zero eccentricity at the supports. Calculate the minimum dead load moment including the self weight and the corresponding maximum possible live load moment at the centre span of the beam at service load, if the service load stress in the beam should be never tensile.
Transcribed Image Text:A prestressed concrete rectangular beam has a width = 400 mm and a depth 900 mm. It is simply supported over a span length of 12m. The beam is subjected to a prestressing force of 2000 KN using a parabolic cable profile having an eccentricity of 240 mm at mid span and zero eccentricity at the supports. Calculate the minimum dead load moment including the self weight and the corresponding maximum possible live load moment at the centre span of the beam at service load, if the service load stress in the beam should be never tensile.
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