## Check stability

Assume base extends 0.3 m beyond either end of wall A, i.e. is 5.0 m long and is 1.2 m wide by 0.9 m deep Overturning moments

Wind (see Figure 6.6)

Mk = 0.51 x 17.2 x 14.1 x [14.1 / 2 + 1.5] = 1057.5

Global imperfections (see Figure 6.7)

Mk = 0.51 x [8.5 x 14.7 + 11.2 x (11.4 + 8.1 + 4.8 + 1.5)] = 0.51 x [125.0 + 11.2 x 25.8] = 0.51 x 414.0 = 211 kNm

Restoring moment

Mk = (1021.0 + 5.0 x 1.2 x 0.9 x 25 + 0 x 225.1 ) x (0.3 + 2.2) = 2890 kNm

At ULS of EQU,

Overturning moment

= fn(Ya1Qk1 + YasupGk) = 1.5 x 1057.5 + 1.1 x 211.0 = 1818.4 kNm Restoring moment = fn(yG.infGk)

6.2.16 Design summary

Figure 6.13 Wall design summary

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### Responses

• norman
How to check stability of structures?
8 years ago