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ID number:185607
 
Author:
Evaluation:
Published: 03.08.2017.
Language: Latvian
Level: College/University
Literature: 15 units
References: Not used
Time period viewed: 2000 - 2010 years
2011 - 2015 years
Extract

1.4.2.Darba stiegrojuma noteikšana atbilstoši SLS (vienkaršota metode)
1.4.2.1. Plaisašanas parbaude
1) Minimalais stiegrojuma šķersgriezuma laukums
Betona laukums stiepes zona Act=0.5·b·d = 0.5·1·0.144·1000·1000 = 72000mm²
Maksimali pie
aujama sprieguma vertiba stiegrojuma tieši pec plaisas atveršanas xs=fyk = 550N/mm²
Betona stiepes stipribas videja vertiba fct,eff=fctm = 3.214N/mm²
Koeficients, kas ieverte nevienmerigo pašlidzsvarojošo spriegumu efektu, ja h 300 mm k = 1
Koeficients, kas ieverte spriegumu sadalijumu šķeluma tieši pirms plaisašanas kc = 0.4
Minimalais stiegrojuma šķersgriezuma laukums, kurš nepieciešamas lai ierobežotu plaisašanu
Acrc
s,min=kc·k·fct,eff·Act/xs = 0.4·1·3.214·72000/550 = 168.297mm²
Parbaude: As,provxAcrc
s,min 1130.4x168.297mm²
2) Maksimala stiegru so
a regulešana
Normativa pastaviga virsmas slodze uz parseguma; gn.G = 5.447kN/m²
Normativa lietderiga virsmas slodze uz parseguma; gn.Q =4.6kN/m²
Parcialais koeficients
₂ =0.8
Kvazi pastaviga slodze m=gn.G+
₂·gn.Q =(5.447+4.6·)=9.127kN/m²
Kopeja apreķina slodze n=xG·gn.G+xQ·gn.Q =(1.35·5.447+1.5·)=14.253kN/m²…

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