Shear in prestress concrete

1. TYPES PRESTRESS CONCRETE
MSc Student
Ali Hassan Dabool
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What is Prestressed Concrete?
It is a method of applying recompression to control the stresses resulting due
to external loads below the neutral axis of the beam.

3. Pre-stressed concrete is used in
 • buildings
 • underground structures
 • towers
 • water storage
 • offshore structures
 • types of bridge
 • nuclear reactor
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Types of Pre-stressing
1. External or internal pre-stressing. It is based on the location of the pre-
stressing tendons with respect to concrete section.
(A)-External pre-stressing of a box girder

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(B)-Internal pre-stressing of a box girder

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2. Pre-tensioning or post-tensioning. It based on the sequence of casting
the concrete and applying tension to the tendons.

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Pre-tensioned electric poles

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Non-prestressed reinforcement
Duct for
prestressing
tendon
Biaxial pre-stressing of a slab

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5. Uniaxial, biaxial or multi-axial pre-stressing. It based on the direction of the
pre-stressing member
Circularly pre-stressed containment structure

10. Thank you for your attention
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