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Channel: The Constructor » Prestressed Concrete Design
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LOSSESS IN PRESTRESS OF PRESTRESSED CONCRETE

LOSSESS IN PRESTRESS OF PRESTRESSED CONCRETE The force which is used to stretch the wire to the required length must be available all the time as prestressing force if the steel is to be prevented from...

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PRE-TENSIONING AND POST-TENSIONING

PRE-TENSIONING AND POST-TENSIONING IN PRESTRESSED CONCRETE DESIGN The prestress in a structure is influenced by either of the two processes: Pre-tensioning, and Post-tensioning Pre-tensioning can be...

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PRESTRESSING SYSTEMS AND ANCHORAGES

In concrete structures, prestress is introduced by stretching steel wire and anchoring them against concrete. Therefore, the prestressing systems should comprise essentially a method of stretching the...

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PRESTRESSED CONCRETE- MERITS AND DEMERITS

Prestressed concrete has the following merits: Since the technique of prestressing eliminates cracking of concrete under all stage of loading, the entire section of the structures takes part in...

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Classification of Prestressed Concrete

There are many ways of classifying pre-stress concrete members based of the member of design, construction and application of pre-stress, some of them are as follows:- External or internal...

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Materials for Prestressed Concrete

High strength concrete mix: Pre-stressed concrete requires concrete which has a high compressive strength, with comparatively higher tensile strength. Low shrinkage, minimum creep characteristics and a...

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SPECIFICATIONS OF PRESTRESSING STEEL

Specification of Prestressing Steel For prestressed concrete members, the high-tensile steel, used generally, consists of wires, bars or strands. The high tensile strength of steel is generally...

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MIX DESIGN OF HIGH STRENGTH CONCRETE

The properties of a high-strength concrete-mix with a compressive strength of more than 40 MPa is greatly influenced by the properties of aggregates in addition to that of the water-cement ratio. To...

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MEASURING LOSS OF PRESTRESS IN PRESTRESSED CONCRETE

Instruments for measuring loss of prestress in prestressed concrete: The  initial  pre-stressing  force  applied  to  the  concrete  element  reduces  due to elastic shortening of the concrete,...

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