Effectiveness of Piled Raft Foundation for Seismic Performance of Tall Buildings
Dr Atul K Desai, Head, Applied Mechanics Department, S V National Institute of Technology, Surat.
The last two years have seen the start of many mega construction projects in India, which include several skyscrapers having more than 40 floors and several more than 150m tall. Their foundation types may be very much different depending on the structural loading and subsurface conditions. In recent years, there have been an increasing number of structures using piled rafts as the foundation to reduce the overall and differential settlements. For cases where a piled raft is subjected to a non-uniform loading, the use of combined pile-raft can improve the performance of the foundation.
Computer aided finite element coding is done by sap2000 v14 for analysis of different foundation system with inclusion of varying soil parameters with respect to different soil layers. For piled rafts embedded in layered soil, the modulus of each layer of soil is used in the computation and accurate solutions are obtained without the use of an averaging technique.
- NBM&CW August 2011