Modelling the pile - raft foundation of high - rise building considering the effect of the ground

Abstract

ABSTRACT

A pile - raft foundation is a combination of the raft and piles foundation, so the interaction between the raft, piles, and the ground is an important factor in design. The advantage of this type of foundation include high load-carrying capacity, rigidity, and large space to use for basements, so this type of foundation has been applied for many highrise buildings in our country. However, at present, there are no design guidelines for pile raft foundations, so the application is still challenging. To evaluate the influence of the ground on the behavior of the structure, this study presents two modeling for pile-raft foundations with and without consideration of the ground coefficient Cz. The 3D finite element model was performed using ETABS and SAFE software. The simulation results show that the internal force values of raft and piles decrease when considering the ground coefficient and the settlement of the foundation also decreases.

Keywords: Pile foundation; pile - raft foundation; the foundation for high-rise buildings; ground coefficient.