The simply supported I beam shown is to carry a uniformly distributed service dead and live load with a total of 8.02 kN/m over its 12.19 m spam, in addition to its own weight. Normal concrete having a density of 24 kN/m³ will be used. The beam will be pretensioned (with a draped/parabolic multiple 7wire strands) at the neutral axis at the supports and varying to an eccentricity at midspan equal to 132mm. The prestress force Pi is 752 kN. Time dependent losses due to shrinkage, creep and relaxation is 15% of P₁. Find the flexural stresses at midspan and support sections under initial and final conditions.

The simply supported I beam shown is to carry a uniformly distributed service dead and live load with a total of 8.02 kN/m over its 12.19 m spam, in addition to its own weight. Normal concrete having a density of 24 kN/m³ will be used. The beam will be pretensioned (with a draped/parabolic multiple 7wire strands) at the neutral axis at the supports and varying to an eccentricity at midspan equal to 132mm. The prestress force Pi is 752 kN. Time dependent losses due to shrinkage, creep and relaxation is 15% of P₁. Find the flexural stresses at midspan and support sections under initial and final conditions.

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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