A prestressed concrete beam 200 mm wide and 300 mm deep, is used over an effective span of 6m to support an imposed load of 4 kN/m. The density of concrete is 24kN/m3. At the quarter span section of the beam, find the magnitude of:a) the concentric prestressing force necessary for zero fiber-stress at the soffit when the beam is fully loaded.b) the eccentric prestressing force located 100 mm from the bottom of the beam which would nullify the bottom fiber stress due to loading. PROBLEM # 1A prestressed concrete beam 200 mm wide and 300 mm deep, is used over an effectivespan of 6m to support an imposed load of 4 kN/m. The density of concrete is 24 kN/m3.At the quarter span section of the beam, find the magnitude of:a) the concentric prestressing force necessary for zero fiber-stress at the soffit when thebeam is fully loaded.b) the eccentric prestressing force located 100 mm from the bottom of the beam whichwould nullify the bottom fiber stress due to loading.

Prestressed concrete is a structural material that allows for predetermined stresses to be fixed in…

Answered: A prestressed concrete beam 200 mm wide…

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 beam 200 mm wide and 300 mm deep, is used over an effective span of 6m to support an imposed load of 4 kN/m. The density of concrete is 24kN/m3. At the quarter span section of the beam, find the magnitude of:

a) the concentric prestressing force necessary for zero fiber-stress at the soffit when the beam is fully loaded.
b) the eccentric prestressing force located 100 mm from the bottom of the beam which would nullify the bottom fiber stress due to loading.

PROBLEM # 1
A prestressed concrete beam 200 mm wide and 300 mm deep, is used over an effective
span of 6m to support an imposed load of 4 kN/m. The density of concrete is 24 kN/m3.
At the quarter span section of the beam, find the magnitude of:
a) the concentric prestressing force necessary for zero fiber-stress at the soffit when the
beam is fully loaded.
b) the eccentric prestressing force located 100 mm from the bottom of the beam which
would nullify the bottom fiber stress due to loading.

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