A pre-tensioned rectangular concrete beam 150 mm wide and 300 mm depth is prestressed with three straight tendons, each having a cross-sectional area of 50 mm2, to an initial stress of 1200 N/mm2. The tendons are located at 100 mm from the soffit of the beam. If the modular ratio is 6, the loss of prestressing force (in kN) due to the elastic deformation of concrete only is, O 4 2 2.8 4.8

Structural Analysis
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Chapter2: Loads On Structures
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A pre-tensioned rectangular concrete beam 150 mm wide and 300 mm depth is prestressed with
three straight tendons, each having a cross-sectional area of 50 mm2, to an initial stress of 1200
N/mm2. The tendons are located at 100 mm from the soffit of the beam. If the modular ratio is 6, the
loss of prestressing force (in kN) due to the elastic deformation of concrete only is,
4
2
2.8
4.8
Transcribed Image Text:A pre-tensioned rectangular concrete beam 150 mm wide and 300 mm depth is prestressed with three straight tendons, each having a cross-sectional area of 50 mm2, to an initial stress of 1200 N/mm2. The tendons are located at 100 mm from the soffit of the beam. If the modular ratio is 6, the loss of prestressing force (in kN) due to the elastic deformation of concrete only is, 4 2 2.8 4.8
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