A rectangular concrete beam 360mm deep and 200mm wide, is prestressed by means of fifteen 5mm diameter wires located 65mm from the bottom of the beam and three 5mm wires, located 275mm from top of the beam, initial tension stress is 840n/mm2. Calculate prestressing force?

A rectangular concrete beam 360mm deep and 200mm wide, is prestressed

1.	A rectangular concrete beam 360mm deep and 200mm wide, is prestressed by means of fifteen 5mm diameter wires located 65mm from the bottom of the beam and three 5mm wires, located 275mm from top of the beam, initial tension stress is 840n/mm2. Calculate prestressing force?
A.	504 10<sup>2</sup>kn
B.	500 10<sup>2</sup>kn
C.	620 10<sup>2</sup>kn
D.	400 10<sup>2</sup>kn
Answer» B. 500 10<sup>2</sup>kn

Discussion

No Comment Found

Related MCQs

The loss of stress due to successive tensioning of curved cables in elastic deformation of concrete is estimated by considering ___________
A post tensioned concrete beam, 100mm wide and 400mm deep is prestressed by three cables, each with a cross sectional area of 50mm2, initial stress of 1200n/mm2. Calculate the stress in concrete at level of steel?
A rectangular concrete beam 360mm deep and 200mm wide, is prestressed by means of fifteen 5mm diameter wires located 65mm from the bottom of the beam and three 5mm wires, located 275mm from top of the beam, initial tension stress is 840n/mm2. Calculate prestressing force?
A pre tensioned concrete beam 100mm wide and 300mm deep, initial force of 150kn at an eccentricity of 50mm, moment of inertia is 225 106mm4, initial stress in steel is 400n/mm2, modular ratio is 8. Estimate the percentage loss?
A pretensioned concrete beam 200mm wide and 300mm deep, is prestressed by straight wires carrying an initial force of 150kn at eccentricity of 50mm, area of steel wires is 188mm2. Find initial stress in steel?
A pretensioned concrete beam, 100mm wide and 300mm deep in prestressed by straight wires and modulus of elasticity of steel and concrete are 210 and 35n/mm2. Find modular ratio?
The loss of stress in steel due to elastic shortening or deformation is ____________
The term Es in losses developed by elastic deformation is defined as ____________
The term Ec in losses developed by elastic deformation is expressed as ____________
The loss of prestress due to elastic deformation of concrete depends on ____________

A rectangular concrete beam 360mm deep and 200mm wide, is prestressed by means of fifteen 5mm diameter wires located 65mm from the bottom of the beam and three 5mm wires, located 275mm from top of the beam, initial tension stress is 840n/mm2. Calculate prestressing force?

Discussion

No Comment Found

Related MCQs

Reply to Comment