Volume 43, N. 3

Special Issue: 70 years of ABMS (Invited Editor: Waldemar Hachich), July-September, 2020

Foundation-structure interaction on high-rise buildings

Article

Volume 43, N. 3, Special Issue: 70 years of ABMS (Invited Editor: Waldemar Hachich), July-September, 2020 | PDF (40 downloads)

Abstract

This article addresses the importance of considering foundation-structure interaction in the design of high-rise buildings. Embedding the behavior of the foundation in the analysis of structures is fundamental to simulate the real deformability of these constructions. On the foundation design side, the addition of structure stiffness implies in the reduction of maximum settlement and angular distortions. On the structural dimensioning side, the consideration of the foundation settlement modifies the flexibility of the structure by changing internal efforts in several parts, which is against safety in many cases. The study of a building with 50 floors is presented, as well as the report of 13 cases of construction where the settlements measurements reached more than 10 times the results of the load test of the isolated element, illustrating the effect of the interaction between different foundation elements. There was a considerable increase in the loads of corner columns and an increase in the overall building’s stability. The gz that is a parameter associated to second-order effects increased exponentially with the increase in the building’s non-verticality.

Keywords: Foundations, Global stability, Load redistribution, Soil-structure interaction, Spring coefficient,


Submitted on June 05, 2020.
Final Acceptance on June 20, 2020.
Discussion open until December 31, 2020.
DOI: 10.28927/SR.433441