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Structural Concrete - Hassoun

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1006 Appendix B Design Tables (SI Units)<br />

Table B.1 Values of R u<br />

and a/d for f ′ c = 21MPa (R u in MPa), (ε t ≥0.005, φ = 0.9 and d = d t )<br />

f y<br />

= 280 MPa f y<br />

= 350 MPa f y<br />

= 420 MPa f y<br />

= 520 MPa<br />

100<br />

ρ Ru a/d R u<br />

a/d R u<br />

a/d R u<br />

a/d<br />

0.2 0.50 0.031 0.62 0.039 0.75 0.047 0.92 0.059<br />

0.3 0.74 0.046 0.92 0.059 1.10 0.071 1.35 0.089<br />

0.4 0.98 0.062 1.22 0.078 1.45 0.094 1.79 0.118<br />

0.5 1.21 0.078 1.50 0.098 1.79 0.118 2.18 0.148<br />

0.6 1.45 0.094 1.79 0.118 2.12 0.141 2.59 0.177<br />

0.7 1.68 0.110 2.06 0.138 2.44 0.165 2.96 0.207<br />

0.8 1.90 0.126 2.33 0.157 2.75 0.189 3.34 0.236<br />

0.9 2.12 0.142 2.59 0.177 3.05 0.213 3.68 0.266<br />

1.0 2.33 0.157 2.84 0.196 3.35 0.238 4.02 0.295<br />

1.1 2.55 0.173 3.10 0.216 3.64 0.260 4.36 0.325<br />

1.2 2.74 0.188 3.35 0.235 3.91 0.280 4.32 0.319<br />

1.3 2.95 0.204 3.59 0.255 4.18 0.306 (ρ max = 1.085)<br />

1.4 3.16 0.220 3.82 0.274 4.44 0.330<br />

1.5 3.35 0.236 4.04 0.294<br />

1.6 3.54 0.252 4.27 0.314<br />

1.7 3.73 0.267 4.32 0.319<br />

1.8 3.91 0.282 (ρ max = 1.37)<br />

1.9 4.09 0.298<br />

2.0 4.27 0.314<br />

2.1 4.43 0.330 4.32 0.319<br />

(ρ max = 1.63)<br />

4.32 0.319<br />

(ρ max = 2.04)<br />

Note: Last values are the maximum for ε t<br />

= 0.005.

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