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Prestressed reinforced concrete attention problems in practical application

2014-10-20 09:24:07

Introduced:
In ordinary reinforced concrete structure, due to the low concrete ultimate tensile strain, in the use of loads, component of steel strain considerably more than the ultimate tensile strain of concrete.
Use:
Can not make full use of rebar in reinforced concrete member strength.So ordinary reinforced concrete structure, the use of high strength steel is unreasonable.
Therefore, in order to make full use of high strength material to bridge the gap between concrete and reinforcing steel bar tensile strain, people apply prestress to the reinforced concrete structure.Or outer loads on the component before, in some way in advance on the artifacts (mainly in the tension zone) exert pressure, when the artifacts produced by external load under tension, the first offset existing prestressing stress in the concrete, and then with the increase of load, to make the concrete in tension and cracks, and delay the emergence and development of cracks artifacts, this is the basic concept of prestressed concrete.

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