1
GATE CE 2024 Set 1
Numerical
+2
-0

An inverted T-shaped concrete beam (B1) in the figure, with centroidal axis X – X, is subjected to an effective prestressing force of 1000 kN acting at the bottom kern point of the beam cross-section. Also, consider an identical concrete beam (B2) with the same grade of concrete but without any prestressing force.

GATE CE 2024 Set 1 Reinforced Cement Concrete - Prestressed Concrete Question 1 English

The additional cracking moment (in kN.m) that can be carried by beam B1 in comparison to beam B2 is ________ (rounded off to the nearest integer).

Your input ____
2
GATE CE 2017 Set 2
Numerical
+2
-0
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 profile having zero eccentricity at the supports. The beam has to carry an external uniformly distributed load of intensity $$30$$ $$kN/m.$$ Neglecting the self - weight of the beam, the maximum dip (in meters, up to two decimal places) of the tendon at the mid-span to balance the external load should be _______________
Your input ____
3
GATE CE 2017 Set 1
Numerical
+2
-0
A pre-tensioned rectangular concrete beam $$150$$ $$mm$$ wide and $$300$$ $$mm$$ depth is prestressed with three straight tendones, each having a cross-sectional area of $$50$$ $$m{m^2},$$ to an initial stress of $$1200$$ $$N/m{m^2}.$$ The tendons are located at $$100$$ $$mm$$ from the soffit of the beam. If the modular ratio is $$6,$$ the loss of prestressing force (in $$kN,$$ up to one decimal place) due to the elastic deformation of concrete only is ________
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4
GATE CE 2015 Set 2
MCQ (Single Correct Answer)
+2
-0.6
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 $$750$$ $$kN.$$ The initial fiber stresses (in $$N/m{m^2}$$ ) at the top and bottom of the beam were: GATE CE 2015 Set 2 Reinforced Cement Concrete - Prestressed Concrete Question 9 English
A
$$4.166$$ and $$20.833$$
B
$$-4.166$$ and $$-20.833$$
C
$$4.166$$ and $$-20.833$$
D
$$-4.166$$ and $$20.833$$
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