GATE CE 2005 | Prestressed Concrete Question 13 | Reinforced Cement Concrete

GATE CE 2005

MCQ (Single Correct Answer)

-0.3

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 pre-tensioned structural elements are respectively

$$M20$$ for both

$$M40$$ and $$M30$$

$$M15$$ and $$M20$$

$$M30$$ and $$M40$$

GATE CE 1993

MCQ (Single Correct Answer)

-0.3

Let $$jd$$ be the lever arm between the resultant tensile force $$T$$ in the reinforcing prestressing steel and the resultant compressive force $$C$$ in concrete of a reinforced / prestressed concrete beam. When subjected to increase in the external bending moment, which one of the following statements is true in reinforced and prestressed concrete beams?

In reinforced concrete beams

$$T$$ increases at a faster rate than $$jd$$

Both $$T$$ and $$jd$$ increases at the same rate

$$jd$$ increases at a faster rate than $$T$$

Neither $$T$$ nor $$jd$$ increases

GATE CE 1993

MCQ (Single Correct Answer)

-0.3

In prestressed concrete beams

$$T$$ increases at a faster rate than $$jd$$

Both $$T$$ and $$jd$$ increases at the same rate

$$jd$$ increases at a faster rate than $$T$$

Neither $$T$$ nor $$jd$$ increases

GATE CE 1992

MCQ (Single Correct Answer)

-0.3

A uniformly distributed load intensity, $$w$$ acting on a simply supported prestressed concrete beam of span $$L,$$ producing a bending moment $$M,$$ at mid-span is to be balanced by a parabolic tendon with zero eccentricity at ends and eccentricity $$e,$$ at mid-span. The prestressing force required depends on

$$w$$ and $$e$$

$$w$$ and $$L$$

$$L$$ and $$e$$

$$M$$ and $$e$$

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GATE CE Subjects

Engineering Mechanics

Work Energy Principle and Impulse Momentum Equation Equilibrium of Force Systems

Strength of Materials Or Solid Mechanics

Centroid and Moment of Inertia Torsion Pure Bending Shear Stress In Beams Strain Energy Method Columns and Struts Complex Stress Deflection of Beams Thin Cylinder Simple Stresses Shear Force and Bending Moment Propped Cantilever Beam

Structural Analysis

Energy Principle Truss Stability and Static Indeterminacy Methods of Analysis Indeterminacy Arches and Cable Slope Deflection Method Matrix Method Moment Distribution Method Influence Line Diagram Plastic Analysis