Determine the load transfer in the interaction soil structure of a post-tensioned foundation slab

Abstract

Introduction. The proposed research analyzes the load transfer of a post-tensioned slab compared to a conventional foundation on soils with low bearing capacity. The design was developed using computer programs to compare the absorbed loads and deformations of both systems in unstable terrain. The results show that post-tensioned foundation slabs have a greater capacity to distribute loads and control deformations, significantly reducing differential settlements. Objective. Determine the absorbed load capacity of a post-stressed foundation slab compared to a conventional slab. Methodology. As we do not have local regulations for the proposed slab design, we rely on bibliographic resources and the post-tensioning foundation slab design method developed by the Post-Tensioning Institute, known as the PTI Method, is based on experimental research carried out since the 1970s. Results. The results obtained show that the post-stressed foundation slab, with a smaller cross-section than the conventional slab, absorbs greater bending moment with a significant reduction of materials such as concrete and reinforcing steel. Conclusion. The reduction of the section of the post-tensioned slab is determined compared to the conventional slab and in the same way the reduction of reinforcing steel. General area of study: civil engineering. Specific study area: Foundations of structures. Type of study: Original article.