Dimensionare Sarpanta.xls

BREVIAR DE CALCUL ŞARPANTA DIMENSIONARE ELEMENTE STRUCTURALE SARPANTA LEMN CONFORM NP 019-97;NP 005-96; STAS 10101/21-92 INCARCARI CONFORM STAS 10101/1-78

INCARCARI DIN ZAPADA STAS 10101/21-92

MATERIALE

Zona

tigla+capriori astereala 2,4cm vata minerala popi+pane

TOTAL

q normat daN/mp 55 30 10 0

95

n q calcul daN/mp 1.2 66 1.3 39 1.3 13 1.3 0 1.3 0 1.3 0 118

TOTAL INCARCARI DIN ZAPADA qz1 normat 180 qz2 normat 180 qz1 calcul 348.5 qz 2 calcul 348.5

D

dc - distanta dintre capriori [m] 0.7 dp - distanta dintre pane [m] 2.70 Lc - lungime caprior [m] 3.03 INCARCARI PERMANENTE (daN/m) (dc*qc*cosa) 73.60 INCARCARI DIN ZAPADA (daN/m) dc*qz1c*cosa2 193.67 TOTAL INCARCARI (daN/m) permanente+zapada 267.27 INCARCARI UTILE (daN) NORMATA [daN] n CALCUL [daN] 100 1.4 140

ce

clasa de importanta 0.8 3

SLEND (Grup Speciala) unghi caprior-orizontala cz1 cz2 g F=g a - 0,4*(q n / ce*gz) 0,3*ga cos a sin a

DIMENSIONARE CAPRIORI

gz daN/mp 180

ge a [grade]

ga 2.2 0.3 27 1.25 1.25 1.94 0.66

0.8910 0.4540

CARACTERISTICI LEMN CONF. NP 019-97 ; NP 005-96 mui 1 coef.cond.lucru Ri daN/cm2 168 rasinoase-clasa II gI 1.1 coef.partial siguranta k 0.55 k1 1 mdi=(qc*k+qz1c*k1)/(qc+qz1c) 0.8862 Ric=mui*mdi*Ri/gI [daN/cm2] 135 Rc=pcal*Lc/2 [daN] MI=pcal*Lc^2/8 [daNm] MII=(gpcal*Lc^2)/8+(guc*Lc)/4[daNm] WnecI=MI*100/0,9*Ric [cm^3] WnecII=MII*100/0,9*Ric [cm^3] mTi - Coeficient de tratare

405 307 191 252 156 0.9

DIMENSIUNI CAPRIORI 8*10; 8x12; 10x12; 10*15; 12*15 l DIMENSIUNI FINALE CAPRIORI bc [cm] hc [cm] CARACTERISTICI SECTIONALE I ef [cm^4] W ef [cm^3] E [daN/cm^2]

10 15

2812.5 375 110000

VERIFICARE Mr > MI Mr=(Ric*Wef*mTi*mui)/100 457 M=max(MI, MII) 307 VERIFICARE RIGIDITATE fmax MI DA fmax MI Mrp=(Ric*Wefp*mTi*mui)/100 675 MI=(pcalp*Lpc^2)/8 657 VERIFICARE RIGIDITATE fmax MI DA fmax Npop COMPRESIUNE AXIALA [daN] FORTA AXIALA POP [daN] Cr > N pop VERIFICARE LA STABILITATE s = 0,3 g c SLEND (GS) g1 =g c SLUO 0 Zona E SLUR (GF) gF =g b - 0,4*(q normat / ce*gz) >= 0,3 g b SLEN g0 =g d - 0,2*(q normat / ce*gz) >= 0,3 g d SLEND (GS) g1 =g f SLUO 0.2

DATE PT. VERIFICAREA RIGIDITATII CAPRIOR INCARCARI PERMANENTE [daN/m] 59.25 INCARCARI DIN ZAPADA [daN/m] 40.01 TOTAL Pn+Pz [daN/m] 99.26 REACTIUNEA [daN] 150.40 K1df 0.8 K2df 0.45 fp=(5/384)*(Pn*Lc^4)/(E*Ief) 0.210 fz=(5/384)*(Pz*Lc^4)/(E*Ief) 0.142

gf 0.6 0.55 0.5 0.45 0

CALCUL CARACTERISTICI PANA Lungime calcul Lpc=lp-(2*a)/2 [m] g lemn [daN/m^3] gcalc.pana bp*hp*g lemn*1,1[daN/m] g normat pana bp*hp*g lemn[daN/m] gz normat - qz1n*dp [daN/m] CALCULUL MOMENTELOR MIp=(gIc*Lpc^2)/2 [daNm] MIIp=(dpc*Lp^2)/8+(gIIc*Lpc)/4[daNm]

2 600 14.85 13.5 486 657 442

DATE PENTRU VERIFICAREA RIGIDITATE PANA INCARCARI PERMANENTE [daN/m] 301.377 INCARCARI DIN ZAPADA [daN/m] 486 TOTAL Pn+Pz [daN/m] 787.377 gpn=pn*Dp/cos a+gnp/1,1 [daN/m] 180.6 K1df 0.8 K2df 0.45 fpp=(5/384)*(gpn*Lpc^4)/(E*Iefp) 0.135 fzp=(5/384)*(gzn*Lpc^4)/(E*Iefp) 0.218 DATE PENTRU CALCUL POPI Greutate proprie pop b*h*H*glemn*1,2 React. pana ((3*Rc*2)/2)+(gcp*Lpc)/2 Ip= b*h^3/12 Incarcare critica Cr = Ric*A*j*mTi

41 1245 4219 4426

[daN] [daN] [cm] [daN]