Abstract:
In design of High-rise buildings, the main issue is to transfer the subjected loads to the
ground safely. So to prevent probable damages and to reduce the deformation, a proper
design of foundation is required. In theses cases a combined piled raft foundation is being
preferred from two to three decades. However, when the piles are connected to the
raft, high stresses are generated in the piles. To overcome this problem a new approach,
to disconnect the piles from raft forming a new type of foundation called disconnected
piled raft foundation (DPRF), has been suggested. The work done in this field is very
less specially under dynamic loads.
The objective of this work to perform numerical analysis on connected and disconnected
Soil-Pile Systems under different soil conditions and loading taking into account the
nonlinear soil-pile-raft interaction modeling the interfaces appropriately using Finite element
software PLAXIS 3D. Furthermore, the influence of geosynthetic reinforcements
in the granular layer of disconnected systems should be investigated.
In detail, the following subjects should be dealt with:
Literature review on existing design approaches and guidelines combined pile
raft foundations (connected and disconnected with and without geosynthetic reinforcement).
Description of the load transfer mechanism of different system under vertical and
horizontal loading.
Representation of different modeling techniques of elements used in the system.
Numerical simulation of connected and disconnected (with and without geosynthetic
reinforcement) Soil-Pile-Raft Systems under dynamic loads.
Comparison of the calculation results of the different systems with regard to the
determination of the influence of various parameters on the load-bearing and deformation
behavior.
Evaluation of the achievements and identification of further research needs.
