Question

b) A rectangular RC slab has the dimensions and support conditions shown in the Figure 2b, with the dimensions of the slab individual parameters. The yield lines cross the boundary of the free-edge with the yield line pattern shown in the figure. It is also subjected to a UDL, n = w kN/m² Where the UDL, n, is an individual parameter. The amount of steel reinforcement at the top of the section is the same as the amount of steel at the bottom of the section. The amount of steel in the two orthogonal directions is the same as well and is given in the Figure 2b Using the Hillerborg strip method calculate the moment of resistance in the slab using triangular strips where appropriate. Assume any strong strips necessary are 0.5m wide. a b c x y w 2 1 2 5 3 15 x (m) a (m) b (m) c (m) y (m) M + M (13 marks) Note: correction factor K is 1.333 -- $\frac{1.333}{\frac{l_1}{2} + l_2 + \frac{l_4}{2}}$ where $l_1$ and $l_2$ have their usual meaning

          b)
A rectangular RC slab has the dimensions and support conditions shown in the Figure 2b, with the
dimensions of the slab individual parameters. The yield lines cross the boundary of the free-edge with
the yield line pattern shown in the figure.
It is also subjected to a UDL, n = w kN/m²
Where the UDL, n, is an individual parameter. The amount of steel reinforcement at the top of the
section is the same as the amount of steel at the bottom of the section. The amount of steel in the two
orthogonal directions is the same as well and is given in the Figure 2b
Using the Hillerborg strip method calculate the moment of resistance in the slab using triangular strips
where appropriate.
Assume any strong strips necessary are 0.5m wide.
a
b
c
x
y
w
2
1
2
5
3
15
x (m)
a (m)
b (m)
c (m)
y (m)
M
+
M
(13 marks)
Note: correction factor K is 1.333 -- $\frac{1.333}{\frac{l_1}{2} + l_2 + \frac{l_4}{2}}$
where $l_1$ and $l_2$ have their usual meaning

b)
A rectangular RC slab has the dimensions and support conditions shown in the Figure 2b, with the
dimensions of the slab individual parameters. The yield lines cross the boundary of the free-edge with
the yield line pattern shown in the figure.
It is also subjected to a UDL, n = w kN/m²
Where the UDL, n, is an individual parameter. The amount of steel reinforcement at the top of the
section is the same as the amount of steel at the bottom of the section. The amount of steel in the two
orthogonal directions is the same as well and is given in the Figure 2b
Using the Hillerborg strip method calculate the moment of resistance in the slab using triangular strips
where appropriate.
Assume any strong strips necessary are 0.5m wide.
a
b
c
x
y
w
2
1
2
5
3
15
x (m)
a (m)
b (m)
c (m)
y (m)
M
+
M
(13 marks)
Note: correction factor K is 1.333 – (1.333)/((l1)/(2) + l2 + (l4)/(2))
where l1 and l2 have their usual meaning

Added by Jennifer P.

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