A posttensioned concrete beam with section shown contains prestressing cables 800 mm² with initial prestress of 100 MPa. The beam is supported over a span of 16 m. The centroid of the section is located 240 mm from the extreme compression fiber and the cables are located 110 mm from the bottom of the beam. It is to carry a dead load of 3.5 kN/m and a live load of 4.75 kN/m. The losses of prestress is about 15%. Calculate the stress at service loads of prestress for the bottom fiber. 500 mm 600 mm A = 100,000 mm2 I = 3600 x 106 mm4
A posttensioned concrete beam with section shown contains prestressing cables 800 mm² with initial prestress of 100 MPa. The beam is supported over a span of 16 m. The centroid of the section is located 240 mm from the extreme compression fiber and the cables are located 110 mm from the bottom of the beam. It is to carry a dead load of 3.5 kN/m and a live load of 4.75 kN/m. The losses of prestress is about 15%. Calculate the stress at service loads of prestress for the bottom fiber. 500 mm 600 mm A = 100,000 mm2 I = 3600 x 106 mm4
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Hello is my answer key correct on the stress at service load on bottom and top fiber
Can you indicate which one is the service load and transfer of pre stress
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