Cuantia Balanceada

fy 4200 Kg/cm^2Es 2000000 Kg/cm^2

0.003 cm/cm0.0021 cm/cm

f'c 175 210 280 350 420 4501β 0.85 0.85 0.85 0.8 0.75 0.73bρ 0.0180 0.0216 0.0289 0.0333 0.0375 0.0391

minρ 0.00220 0.00242 0.00279 0.00312 0.00342 0.00354

ZONA BAJA SISMICIDADmaxρ 0.0134 0.0162 0.0216 0.0250 0.0281 0.0293

0.3216 0.3240 0.3240 0.3000 0.2812 0.2738Ku 41.0411 49.5301 66.0402 77.7735 88.6713 92.9621

ZONA ALTA SISMICIDADmaxsρ 0.0090 0.0108 0.0145 0.0167 0.0188 0.0196

0.2160 0.2160 0.2168 0.2000 0.1875 0.1825Kus 29.6845 35.6214 47.6359 55.5660 63.0345 65.9540

las cuantias balanceadas y cuantias maximas son aplicables solo a secciones rectangularessin acero en comprension

DesignacionPeso Diametro Area Area (cm^2)

Kg/ml pulg cm cm^2 2 32 0.25 1/4" 0.64 0.32 0.63 0.953 0.56 3/8" 0.95 0.71 1.43 2.144 0.994 1/2" 1.27 1.27 2.53 3.805 1.552 5/8" 1.59 1.98 3.96 5.946 2.235 3/4" 1.91 2.85 5.70 8.558 3.973 1" 2.54 5.07 10.13 15.20

11 7.907 1 3/8" 3.49 9.58 19.16 28.746 mm 0.222 - 0.6 0.28 0.57 0.858 mm 0.395 - 0.8 0.50 1.01 1.51

12 mm 0.888 - 1.2 1.13 2.26 3.39

εcuεy

maxω

maxsω

ϕ 0.9 FLEXIONϕ 0.85 CORTEϕ 0.85 TORSION

ϕ 0.75 REF. HELICOIDALϕ 0.7 REF. ESTRIBOS

Area (cm^2)4 5

1.27 1.582.85 3.565.07 6.337.92 9.90

11.40 14.2520.27 25.3438.32 47.901.13 1.412.01 2.514.52 5.65