Published Paper Details:

Nonlinear finite element analysis has been performed to understand the behaviour of piled raft under plane strain condition. The soil has been idealized by Extended Drucker-Prager yield criterion. The raft and piles have been considered as linear elastic material. Four nodedisparametric finite elements has been used for discretization. The number of nodes are 243 and number of elements is 208. At all loading intensity the settlement of raft is more than piled rafts. For piled raft having pile of length to diameter ratio equal to 10 settles more than other piles of piled raft. For piled rafts having pile of length to diameter ratio of 20 settle more than piled raft having pile length to diameter ratio equal to 30. The load settlement curve for raft and piled rafts are nonlinear. When the thickness (T) is 0.5 m, the settlements of raft and piled raft both decreases. The raft undergoes maximum settlement followed by piled raft having piles of length to diameter equal to 10,20 and 30. When the thickness (T) is 1.0 m, the settlements of raft and piled raft both decreases than at thickness (T)= 0.50 m. Similarrly at thickness equal to 2.0, the settlement of raft and piled raft decreases than at thickness 1.0 m. The axial load is maximum at the top and minimum at the bottom at all loading intensity. The axial load increases with increase in loading intensity. The axial load distribution curve is nonlinear. This nonlinearity is maximum at loading intensity equal to 60 kN/m2. The axial load is greater for all loading intensity for L/d ratio 20 than L/d=10. Similarly the axial load is greater for all loading intensity for L/d ratio 30 than L/d=20.