DISEÑO DE COLUMNAS PREDIMENSIONAMIENTO Mo Md Ml PL= 5.00 tn Ma= 8.000 3.000 PD= 8.00 tn Mb= 8.000 5.000 F'C= 210 kg/cm2 Mb'= 59.1 FY= 4200 kg/cm2 Ln= 270 cm Pu = 19.7 tn Ag = 1.25*pu / 0.25*f'c Ag = 0.3095 cm2 Usar : b = 30 cm t = 50 cm Longitud de Calculo de la columna v-3 c-3 v-2 b c-2 v-1 a c-1 Elemento b h-t I E L(cm) columna 1 30 50 312500 217370.65 270.00 2.407407 columna 2 30 50 312500 217370.65 270.00 2.407407 columna 3 30 50 312500 217370.65 270.00 viga 1 30 50 312500 217370.65 650.00 viga 2 30 50 312500 217370.65 650.00 Ya = 2.40741 Yb = 2.40741 K= 1.7 tabla 1.01 K=1.00 * Si la columna esta arriostrada usar k =1.00 ( caso contrario k >1.00 ) Luc =K*Ln Luc = 459 cm Indice de Esbeltez klu/y donde y=radio de giry=0.3*t
Hoja1DISEO DE
COLUMNASPREDIMENSIONAMIENTOMoMdMlPL=5.00tnMa=8.0003.000PD=8.00tnMb=8.0005.000F'C=210kg/cm2Mb'=59.1FY=4200kg/cm2Ln=270cmPu
=19.7tnAg = 1.25*pu / 0.25*f'cAg =0.3095cm2Usar :b =30cmt
=50cmLongitud de Calculo de la
columnav-3c-3v-2bc-2v-1ac-1Elementobh-tIEL(cm)columna
13050312500217370.651192842270.002.4074074074columna
23050312500217370.651192842270.002.4074074074columna
33050312500217370.651192842270.00viga
13050312500217370.651192842650.00viga
23050312500217370.651192842650.00Ya =2.4074074074Yb
=2.4074074074K=1.7tabla 1.01K=1.00* Si la columna esta arriostrada
usar k =1.00 ( caso contrario k >1.00 )Luc =K*LnLuc =459cmIndice
de Esbeltezklu/ydonde y=radio de giroy=0.3*ty =15Klu/y =30.6>22
d>>1.00d = Cm / (1-(Pu/(*pc))* Si la columna esta arriostrada
usar Cm =1.00EI = Ec*Ig /
2.5*(1+Bd)Bd=0.4523809524Bd=0.6835871404EI =60062943092.7589d
=1.1367148858PC=233.9935732221
