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Ywxh kN

Characteristic thrust from water behind dam: Pw Gk --- 99.3-

( h ^ kNm and its moment about the dam toe is: Mpw Gk = PwGkx ~ = 149"

Integrating the pressure diagram above to obtain the characteristic uplift on kN

This value obtained by assuming a linear fall in pressure across the dam is:

Taking moments of the pressure diagram about the toe, we get the kNm characteristic overturning moment due to uplift: Mu Gk = 93.3-

Effects of actions

According to EN 1997-1, partial factors on destabilizing and stabilizing permanent actions are yg dst = 1.1 and yg stb = 0.9 respectively.

The design destabilizing moment about the toe is: O

The design stabilizing moment about the toe is:©

MEd,stb = YG,stb x MW,Gk = 243.4_m~ Verification of stability against overturning_

The degree of utilization is

MEd,stb

The design is unacceptable if the degree of utilization is > 100% The traditional lumped factor of safety for this design based on gross

MPw,Gk + MU,Gk but based on net moments (i.e. deducting the uplift from the self-weight of

MPw,Gk Actions

The self-weight of the dam and thrust from water behind dam are unchanged from above. Integrating the pressure diagram to obtain the characteristic uplift on the dam with a cutoff at its heel, we get: kN

Taking moments about the toe, the characteristic overturning moment due to kNm uplift is then: Mu Gk = 43.1-

Dam with cutoff at heel

Effects of actions

The design destabilizing moment about the toe is:

The design stabilizing moment about the toe is:

The degree of utilization is

The degree of utilization is

The design is unacceptable if the degree of utilization is > 100% The traditional lumped factor of safety based on gross moments is:

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