GATE CE
Reinforced Cement Concrete
Prestressed Concrete
Previous Years Questions

## Marks 1

The creep strains are
Which one of the following is categorized as a long-term loss of prestress in a prestressed concrete member?
$$IS:$$ $$1343 – 1980$$ limits the minimum characteristic strength of pre-stressed concrete for post tensioned works and pretension work as
As per Indian standard code of practice for prestressed concrete $$(IS:1343-1980)$$ the minimum grades of concrete to be used for post-tensioned and p...
Let $$jd$$ be the lever arm between the resultant tensile force $$T$$ in the reinforcing prestressing steel and the resultant compressive force $$C$$ ...
Let $$jd$$ be the lever arm between the resultant tensile force $$T$$ in the reinforcing prestressing steel and the resultant compressive force $$C$$ ...
A uniformly distributed load intensity, $$w$$ acting on a simply supported prestressed concrete beam of span $$L,$$ producing a bending moment $$M,$$ ...
The loss of prestress due to elastic shortening of concrete is least in

## Marks 2

A simply supported rectangular concrete beam of span $$8$$ $$m$$ has to be prestressed with a force of $$1600$$ $$kN.$$ The tendon is of parabolic pro...
A pre-tensioned rectangular concrete beam $$150$$ $$mm$$ wide and $$300$$ $$mm$$ depth is prestressed with three straight tendones, each having a cros...
In a pre-stressed concrete beam section shown in the figure, the net loss is $$10\%$$ and the final prestressing force applied at $$X$$ is $$750$$ $$... A rectangular concrete beam$$250mm$$wide and$$600mm$$deep is pre-stressed by means of$$16$$high tensile wires, each of$$7mm$$di... A concrete beam prestressed with a parabolic tendon is shown in the sketch. The eccentricity of the tendon is measured from the centroid of the cross-... A rectangular concrete beam of width$$120mm$$and depth$$200mm$$is prestressed by pretensioning to a force of$$150kN$$at an eccent... A pre-tensioned concrete member of section$$200\,\,mm \times 250\,\,mm$$contains tendons of area$$500\,\,m{m^2}$$at the centre of gravity of the ... A concrete beam of rectangular cross-section of size$$120mm$$(width) and$$200mm$$(depth) is prestressed by a straight tendon to an effec... A concrete beam of rectangular cross section of$$200\,\,mm \times 400\,\,mm$$is pre-stressed with a force$$400kN$$at eccentricity$$100m...
A simply supported prestressed concrete beam is $$6$$ $$m$$ long and $$300$$ $$mm$$ wide. Its gross depth is $$600$$ $$mm.$$ It is prestressed by hor...
A concrete column carries an axial load of $$450$$ $$kN$$ and a bending moment of $$60$$ $$kN$$-$$m$$ at its base. An isolated footing of size $$2m \t... A prestressed concrete rectangular beam of size$$300\,\,mm \times 900\,\,mm$$is prestressed with an intial prestressing force of$$700kN$$at a... A prestressed concrete rectangular beam of size$$300\,\,mm \times 900\,\,mm$$is prestressed with an intial prestressing force of$$700kN$$at a... A prestressed concrete beam has a cross-section with the following properties: Area$$A = 46,000\,\,m{m^2},{\rm I} = 75.8 \times {10^7}\,\,m{m^4}...
A rectangular simply supported prestressed concrete beam of span $$L$$ is subjected to a prestressing force of $$P$$ acting centrally at end sections ...

## Marks 5

A $$10m$$ long prestressing bed is used to cast $$4$$ (pretensioned) prestressed concrete beams of $$2.3$$ $$m$$ each. A schematic representation of t...
A simply supported rectangular prestressed concrete beam $$200$$ $$mm$$ wide and $$400$$ $$mm$$ deep has an effective span of $$12$$ $$m.$$ The prest...
A beam with a rectangular cross section of size $$250$$ $$mm$$ wide and $$350$$ $$mm$$ deep is prestressed by a force of $$400$$ $$kN$$ using $$8$$ nu...
The cross-section of a pretensioned pre-stressed concrete beam is shown in Figure. The reinforcement is placed concentrically. If the stress in steel ...
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