A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Inoviranje parametra αcc za proračun otpornosti stubova od betona visoke čvrstoće ; Innovation of parameter αcc for design resistance of high-strength concrete columns
Uporaba betona visoke čvrstoće znatno je porasla u posljednjih nekoliko decenija. Povećanjem tlačne čvrstoća betona, naponsko-deformacijska svojstva betona se mijenjaju. U suvremenim tehničkim propisima predlažu se posebne odredbe za beton visoke čvrstoće. EN 1992-1-1 obuhvaća betone do klase C90/105. Prema EN 1992-1-1 faktor redukcije za vrijednost projektne tlačne čvrstoće betona αcc, ovisi o dva parametra, od kojih niti jedan nije tlačna čvrstoća betona. Rezultati ispitivanja su pokazali da izračun nosivosti stupova, s preporučenom αcc i naponsko-deformacijska veza oblika parabola-pravokutnik je ne-konzervativna za beton visoke čvrstoće. Pokazalo se da koeficijent αcc treba redefinirati uvođenjem novog parametra, koji će pokriti razlike za manju proračunsku čvrstoću betona visoke čvrstoće. U mnogim zemljama koristi se vrijednost 0,85 za αcc, kako je predloženo u njihovim nacionalnim dokumentima. Korelacija između izračunatog kapaciteta stupova i eksperimentalnih rezultata korištena je za njegovo redefiniranje. ; 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.
Inoviranje parametra αcc za proračun otpornosti stubova od betona visoke čvrstoće ; Innovation of parameter αcc for design resistance of high-strength concrete columns
Uporaba betona visoke čvrstoće znatno je porasla u posljednjih nekoliko decenija. Povećanjem tlačne čvrstoća betona, naponsko-deformacijska svojstva betona se mijenjaju. U suvremenim tehničkim propisima predlažu se posebne odredbe za beton visoke čvrstoće. EN 1992-1-1 obuhvaća betone do klase C90/105. Prema EN 1992-1-1 faktor redukcije za vrijednost projektne tlačne čvrstoće betona αcc, ovisi o dva parametra, od kojih niti jedan nije tlačna čvrstoća betona. Rezultati ispitivanja su pokazali da izračun nosivosti stupova, s preporučenom αcc i naponsko-deformacijska veza oblika parabola-pravokutnik je ne-konzervativna za beton visoke čvrstoće. Pokazalo se da koeficijent αcc treba redefinirati uvođenjem novog parametra, koji će pokriti razlike za manju proračunsku čvrstoću betona visoke čvrstoće. U mnogim zemljama koristi se vrijednost 0,85 za αcc, kako je predloženo u njihovim nacionalnim dokumentima. Korelacija između izračunatog kapaciteta stupova i eksperimentalnih rezultata korištena je za njegovo redefiniranje. ; 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.
Inoviranje parametra αcc za proračun otpornosti stubova od betona visoke čvrstoće ; Innovation of parameter αcc for design resistance of high-strength concrete columns
Sinđić-Grebović, Radmila (author) / Radovanović, Željka (author)
2017-10-25
Tehnički vjesnik ; ISSN 1330-3651 (Print) ; ISSN 1848-6339 (Online) ; Volume 24 ; Issue 5
Article (Journal)
Electronic Resource
Croatian , English
DDC:
690
Proračun greda od lakoagregatnog betona ; Analysis of lightweight aggregate concrete beams
| BASE | 2012
Innovation and human resource management ; Inoviranje in management človeških virov
| BASE | 2017
| TIBKAT | 1966