Tehnički vjesnik, Vol. 24 No. 5, 2017.
Izvorni znanstveni članak
https://doi.org/10.17559/TV-20150125105926
Innovation of parameter αcc for design resistance of high-strength concrete columns
Radmila Sinđić-Grebović
orcid.org/0000-0002-8301-5691
; University of Montenegro, Faculty of Civil Engineering, Bul. Džordža Vašingtona bb, 81000 Podgorica, Montenegro
Željka Radovanović
; University of Montenegro, Faculty of Civil Engineering, Bul. Džordža Vašingtona bb, 81000 Podgorica, Montenegro
Sažetak
The usage of high-strength concrete has been increased significantly in recent decades. By increasing the compressive strength of concrete, stress-strain features of concrete are changed. In contemporary technical regulations specific provisions for high-strength concrete are proposed. EN 1992-1-1 comprises concretes to the class C90/105. According to EN 1992-1-1 reduction factor for value of concrete compressive strength for design αcc, depends on two parameters, none of which compressive strength of concrete. Test results have shown that calculation of bearing capacity of columns, with recommended αcc and curved-rectangular stress block is non-conservative for high-strength concrete. It was shown that coefficient αcc should be redefined by introducing of new parameter which will cover differences of less design strength for high strength concrete. In many countries value of 0,85 is used for αcc, as proposed in their National Documents. Correlation between calculated capacity of columns and experimental results was used for its redefining.
Ključne riječi
column; design compressive strength; EN 1992-1-1; high-strength concrete; parameter αcc
Hrčak ID:
188242
URI
Datum izdavanja:
25.10.2017.
Posjeta: 1.897 *