High strength steel used in prestressed concrete can take how much maximum strain?
For a rectangular prestressed beam designed for operating stress conditions, what is the maximum prestressing force?
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If a simply supported concrete beam, prestressed with a force of 2500 kN, is designed by load balancing concept for an effective span of 10 m and to carry a total load Of 40 kN/m, the central dip of the cable profile should be
A prestressed concrete beam has a cross section with the following properties:
A = 46,400 mm^{2}, I = 75.8 x 10^{7} mm^{4},
y_{bottom} = 244 mm, y_{top} = 156 mm.
It is subjected to a prestressing force at an eccentricity ‘e’ so as to have a zero stress at the top fibre. The value of ‘e’ is given by
The purpose of reinforcement in prestressed concrete is
The coefficient of shrinkage for high grade concrete for pretensioned work is
If 'P' is the prestressing force applied at a maximum eccentricity 'g' at midspan, figure, to balance the concentrated load 'W', the balancing load will be
Consider the following factors
1. initial prestress
2. losses in prestress
3. depth of cable from extreme compression fibre
Those which affect the ultimate moment capacity of a prestressed concrete beam would include
31 docs280 tests

31 docs280 tests
