4.2 Variation of radial moment in raft
The variation in radial moment due to the effect of soil flexibility is studied on 200 m chimney, modelled with annular raft. The structure is assumed to be resting on very soft to stiff soils, modelled using elastic model, and the percentage variation in radial moment with conventional method are tabulated in table 3. The variation is plotted in
Figure 1 and figure 2, for H/Db 17 with Do/t 15 and Do/t 20 respectively.