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TUTCRIS

Second-order analysis of prestressed concrete columns

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Yksityiskohdat

AlkuperäiskieliEnglanti
OtsikkoProceedings of the fib Symposium 2019
AlaotsikkoConcrete - Innovations in Materials, Design and Structures
ToimittajatWit Derkowski, Piotr Krajewski, Piotr Gwozdziewicz, Marek Pantak, Lukasz Hojdys
KustantajaInternational Federation for Structural Concrete
Sivut1068-1074
Sivumäärä7
ISBN (elektroninen)9782940643004
TilaJulkaistu - 2019
OKM-julkaisutyyppiA4 Artikkeli konferenssijulkaisussa
Tapahtumafib Symposium -
Kesto: 1 tammikuuta 2000 → …

Julkaisusarja

Nimi FIB symposium proceedings
ISSN (elektroninen)2617-4820

Conference

Conferencefib Symposium
Ajanjakso1/01/00 → …

Tiivistelmä

The use of prestressed concrete columns has been quite rare in Finland, mainly for reason of a lack of national design regulations and guidelines. To promote their use, the Confederation of Finnish Construction Industries initiated a research project on precast prestressed concrete columns, in connection with an extensive research programme at Tampere University examining slender concrete structures. A displacement-based calculation model developed earlier in the programme for reinforced concrete columns and piles was developed further for evaluating the buckling of slender prestressed columns. The researchers applied this model to compare structural behaviour between prestressed and reinforced columns of the same dimensions and concrete strength and to evaluate the structure’s suitability for test specimens for a later, experimental stage of research. The prestressed cross section cracked only after quite considerable bending. With simultaneous compressive force to the top of the column, there was even less cracking. The mathematical calculations took into account the normal force dependent bending stiffness. The results reveal a significant reduction in the amount of steel material necessary when prestressing is applied.

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