Static structures (e.g. – buildings) – With component having discrete prestressing means – Beam – girder – or truss construction
Patent
1984-10-31
1987-09-08
Perham, Alfred C.
Static structures (e.g., buildings)
With component having discrete prestressing means
Beam, girder, or truss construction
52224, 242 672, 248559, 264228, E04C 310, B65H 1602, B65H 1800, B28B 904
Patent
active
046914889
ABSTRACT:
A method for producing a constructional element comprising a steel casing filled with concrete, for instance, a machine body having good load carrying and vibration-absorbing properties. The main steel parts of the element are arranged to form a hollow casing filled with a fluid concrete mass. Internal pressure is supplied in the casing to act on the concrete mass during its hardening phase, the pressure being selected so as to provide in the steel casing an elastic deformation and expansion which substantially exceeds the shrinkage of the concrete mass during its hardening phase. The internal pressure must be sufficient to cause such a deformation of the steel casing that there is a remaining compression between the steel casing against the dry shrunk concrete in the finished element under all the loading and deforming conditions for which the constructional element has been designed. Special concrete mixes and casing filling procedures are used, which produce a concrete and steel construction element having good vibration-absorbing properties.
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Oy Wartsila Ab
Perham Alfred C.
Smolowitz Martin
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