pz_stat
DESCRIPTION
Primer proracuna potpornog zidaTRANSCRIPT
STATIČKI PRORAČUN, PZ
KONTROLNI STATIČKI PRORAČUN POTPORNIH ZIDOVA
H=6.60 M; PZ2
( h = 6.60 t = 4.30 ht = 1.00 j = 2.30 )
1.1 ANALIZA OPTEREĆENJA
Zasip za zidom:
20kNm3; = 30°; c= 0.0 kN/m2;
Tlo pod temeljem:
20kNm3; = 30°; c= 0.0 kN/m2;
Gb1 = 66.00 kN/m Gb2 = 51.15 kN/m Gb3 = 107.50 kN/m Gz1 = 303.60 kN/m Gz21 = 0.00 Gz22 = 0.00 Ea1 = 145.20 kN/m Ea2 = 192.53 kN/m Epp1
v = 73.33 kN/m Epp2
v = 84.44 kN/m – vozila p
v= 33.33 kN/m
2
Ep1 = 0.00 Ep2 = 0.00 a1 = 2.20 m a2 = 2.53 m p1
v= 3.30 m p2
v= 3.80 m
STATIČKI PRORAČUN, PZ
1.2 PROVERA PREVRTANJA, KLIZANJA I NOSIVOSTI TEMELJNOG TLA
Presek 1 – 1
N1 = 117.15 kN/m M1 = 545.90 kNm/m H1 = 218.53 kN/m
Presek 2 – 2
N2 = 528.25 kN/m M2 = 565.70 kNm/m H2 = 273.64 kN/m
Presek a – a
Qa = 246.92 kN/m Ma = 128.90 kNm/m Ha = 0.00 kN/m
Presek b – b
Qb = 283.93 kN/m Mb = 383.44 kNm/m Hb = 0.00 kN/m
e= M/N= 565.70/528.25= 1.07 m > B/6 = 0.72 m; emax= 5·B/18= 1.19 cm σ1 = 306.42 kN/m
2; σ2 = -60.72 kN/m
2
2/ ;3
'2eBx
x
Vr
;
eB
V
x
V
2
'
2
'
σr= 326.08 kN/m2; = 244.56 kN/m
2< σdop= 350 kN/m
2 O.K.!
Mstab= 1378.65 kNm/m Mprev= 808.61 kNm/m g = 1.70 => kontrola prevrtanja O.K.!
Rd = N2,k · tg = 563.28 · tg 30˚= 325.21 kN/m H2,k = 191.41 kN/m
g = 1.70 => kontrola klizanja O.K.!
1.3 DIMENZIONISANJE
Razmatran je mirni pritisak tla
K0= (1-sinφ)·(1+sinβ)
K0= (1-sin 30°)·(1+sin0°)= 0.50
maxM1-1= 1.60·(Em·h/3+G·rG)+1.80·( Epp1v ·rpp1
v)= 1395.80kNm/m
N1-1= 1.60· γ·A= 1.60·25·4.56= -182.52 kN/m
T1-1= 1.60·Em+1.80·(Epp1v) = 1.60·217.8+1.80·(110.00)= 546.48 kN/m
8.0
Aa1
8.0
Aa2
y
z
[cm]
102.0
100.0
MB30
Podužna armatura RA 400/500 Mxu = 0.00 kNm Myu = 0.00 kNm Mzu = 1395.80 kNm Nxu = -182.52 kN b/a = -1.664/10.000 ‰ Aa1 = 36.75 + 0.00 = 36.75 cm
2
Aa2 = 0.00 + 0.00 = 0.00 cm2
Aa3 = 0.00 + 0.00 = 0.00 cm2
Aa4 = 0.00 + 0.00 = 0.00 cm2
Poprečna armatura RA 400/500 Tzu = 0.00 kN Tyu = 546.48 kN Mxu = 0.00 kNm Aa,uz = 0.00 + 0.00 = 0.00 cm
2/m
Minimalna potrebna armatura Asmin= 0.2%·b·h= 18.80 cm2/m
USVOJENO: RØ22/10 (38.00 cm2/m), zaštitni sloj a0= 5 cm
podeona armatura RØ16/15 (13.41 cm2/m)