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In: Civil Engineering

A post-tensioned concrete beam, 170 mm wide and 320 mm deep, is prestressed five wires of...

A post-tensioned concrete beam, 170 mm wide and 320 mm deep, is prestressed five wires of 8 mm diameter located at constant eccentricity of 50 mm and carrying an initial stress of 840 N/mm. The span of the beam is 10 m. Calculate the percentage loss of stress in wires for The beam is pretensioned and The beam is post- tensioned. Using the following data: Es = 210 kN/mm2, Ec = 35 kN/mm, Creep coefficient = 1.6, %3D Relaxation of steel stress = 5 per cent of the initial stress, Slip at anchorage 1 mm, Frictional coefficient for wave effect = 0.0015 per m, Shrinkage of concrete =300x10 for pretensioning and 200x10° for post-tensioning

concrete
iwan’t answer after 30 minuts please

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Ally Wells answered 2 years ago
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