A prestressed concrete rectangular beam 500mm. by 750 mm. has simple span of 7:30 m and is loaded by a uniform load of 45 KN/m. including its own weight. The prestressing tendon is located 145mm below the neutral axis and the initial prestressing force is 1620 KN. Compute the stresses in the concrete at the midspan section. What would be the stresses if the losses in prestress are 15%? 45 kN/m ¹2 750 500 e 145 mm

Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
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Pls. Solve as shown figure below.
A prestressed- concrete rectangular beam 500mm. by 750 mm. has simple span of 7:30 m
and is loaded by a uniform load of 45 KN/m. including its own weight. The prestressing tendon is
located 145mm below the neutral axis and the initial prestressing force is 1620 KN. Compute the
stresses in the concrete at the midspan section. What would be the stresses if the losses in prestress
are 15%?
A
45 kN/m
2
750
119
500
e = 145 mm
Transcribed Image Text:A prestressed- concrete rectangular beam 500mm. by 750 mm. has simple span of 7:30 m and is loaded by a uniform load of 45 KN/m. including its own weight. The prestressing tendon is located 145mm below the neutral axis and the initial prestressing force is 1620 KN. Compute the stresses in the concrete at the midspan section. What would be the stresses if the losses in prestress are 15%? A 45 kN/m 2 750 119 500 e = 145 mm
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