Hoja1

DISEO DE COLUMNAS GRAVITACIONALES Carga de nivelCarga acumuladaCombinaciones LRFDNIVEL Area t, SFDL, PSFLL, PSFPDL, KipsPLL, KipsPDL, KipsPLL, Kips1.4PDL1.2PDL+1.6PLLPu, Kips48.001080.0087.0040.0093.9643.2093.9643.20131.54181.87181.8736.001080.0095.5080.00103.1486.40197.10129.60275.94443.88443.8824.001080.0095.5080.00103.1486.40300.24216.00420.34705.89705.8912.001080.0095.5080.00103.1486.40403.38302.40564.73967.90967.90NIVEL Longitud, ftKxKyKly, ftSeccionPn, KipsD/CConclusionSeccion48.0012.0020.89.6W12X404080.4457647059OKW12X4536.0012.001.20.657.8W12X454950.8967272727OKW12X87Cambio24.0012.001.20.657.8W12X657980.8845714286OK12.0012.0020.89.6W12X8710400.9306692308OK

CALCULO DE LA CAPACIDAD DE LAS SECCIONES Nivel48ftSeccionW12X45Long=12.00ftKx=2Ky=0.8

Compacidad de los patinesbf/2t=7Fy=50ksir= 0.56E/Fy=13.49Conclusion No Esbelto

Compacidad del almah/tw=29.6Fy=50ksir= 1.49E/Fy=35.88Conclusion No Esbelto

Esbeltez critica de la seccion KL/rx=55.92rx=5.15inKL/ry=59.08ry=1.95inKL/r Critico=59.084.71E/Fy=113.43E3-2=38.74ksiE3-3=71.92ksiFe=82.01ksiFcr=38.74ksi

Capacidad axialPn= *Pcr*Ag=456.73kips=0.9LRFDPcr=38.74KsiAg=13.1in^2D/C0.40ConclusionOK