PRORAUN POTPORNOG ZIDA
DIMENZIJE:
irina pete zida mora zadovoljiti sljedei uvjet:
Proraun stabilnosti na prevrtanje(GEO/STR)
Sila aktivnog tlaka:
Teina zida podijeljenog na elemente :
Teina zasipa:
Ukupna teina zida (sa zasipom):
Dodatno (promjenjivo) optreenje:
Kontrola stabilnosti na prevrtanje oko toke A:
Nosivost tla ispod temelja (GEO/STR)Sile za zadane proraunske
parametre odreene su kod proprauna stabilnosti na prevrtanje.
Proraunske sile i moment oko toke S:
Ekscentricitet sile :
Traka
Kontrola za nosivost tla:
Iz uvjeta stabilnosti moe se izraziti i stupanj iskoritenosti
kao:
Proraun stabilnosti na klizanje (GEO/STR)
Proraunske sile :
Kontrola stabilnosti na klizanje:
Iz uvjeta stabilnosti moe se izraziti i stupanj iskoritenosti
kao:
Armatura:
Reinforced Concrete Section Design to Bendingaccording to
Eurocode 2 (EN 1992-1-1/2004)Input parameters:C25/30- concrete
grade
B500B- reinforcement grade
MEd= 10.6kNm- design bending moment
b = 100cm- section width
h = 20cm- section height
d1= 3.4cm- distance from the bottom to the centroid of the
reinforcement
C= 1.50- partial safety factor for concrete
S= 1.15- partial safety factor for reinforcing steel
cc= 1.00- coefficient of compressive strength
fck= 25N/mm2- characteristic compressive strength of
concrete
fyk= 500N/mm2- characteristic yield strength of
reinforcement
Design value of concrete compressive strength:fcd= ccfck/C=
1.002.5/1.5 = 1.67 kN/cm2Design yield strength of
reinforcement:fyd= fyk/S= 50/1.15 = 43.48 kN/cm2Effective depth of
a cross-section:d = h - d1= 20 - 3.4 = 16.6 cmValue of
nondimensional bending moment:Ed= MEd/(bdfcd) = 1060/(10016.621.67)
= 0.023For:Rd= 0.027c= 1.2 s1= 20.0 = 0.057 = 0.980Required
reinforcement:As1= MEd/ (fydd) = 1060 / (43.480.98016.6) = 1.50
cm2As1= 1.50 cm2Minimum reinforcement:As,min= 0.26(fctm/fyk)btd =
0.260.26/50.0010016.6 = 2.24 cm2Maximum reinforcement:As,max=
0.04bh = 0.0410020 = 80.00 cm2As1= 1.50 cm2< As,min= 2.24
cm2< Amax= 80.00 cm2Relevant required reinforcement:As,req= 2.24
cm2Beton C25/30, armatura B500B.Odabrana armatura: mree Q335 u obe
zone, zatini sloj zida 3 cm, zatitni sloj stope 4,5 cm.
