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From version < 22.1 >
edited by IwonaBudny
on 2018/12/04 15:12
To version < 22.2 >
edited by IwonaBudny
on 2018/12/04 15:14
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130 130  
131 131  == Ultimate limit state ==
132 132  
133 +(% style="text-align: justify;" %)
134 +The design of the slab is performed with respect to the design moments described in 2.2.1 above.
135 +
136 +(% style="text-align: justify;" %)
137 +In order to minimize cracking in the slab a good way is to reinforce according to the elastic moments which normally also leads to good reinforcement economy. The required bending reinforcement is designed according to EC2 3.1.7, where a rectangular stress distribution as shown below has been assumed.
138 +
139 +
140 +(% class="MsoBodyText" style="margin-top:0cm; margin-right:5.25pt; margin-bottom:.0001pt; margin-left:5.5pt; text-align:justify; margin:0cm 0cm 0.0001pt 5.3pt" %)
141 +[[image:1543932761308-583.png||height="175" width="392"]]
142 +
143 +
144 +λ = 0,8 for f,,ck,, ≤ 50 MPa
145 +
146 +λ = 0,8 - (f,,ck,, - 50)/400 for 50 < f,,ck,, ≤ 90 MPa
147 +
148 +and:
149 +
150 +η = 1,0 for f,,ck,, ≤ 50 MPa
151 +
152 +η = 1,0 - (f,,ck ,,- 50)/200 for 50 < f,,ck,, ≤ 90 MPa
153 +
154 +(% style="margin-top:.25pt; margin:0cm 0cm 0.0001pt" %)
155 +
156 +
133 133  == Shear capacity ==
134 134  
135 135  == Punching ==
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