Theoretical-experimental analysis of column-foundation connection through socket of precast concrete structures

Author(s)

Rejane Martins Fernandes Canha

• Document type: Doctoral Thesis
• Press: São Carlos. , gráficos, ilustrações, tabelas.
• Institution: Universidade de São Paulo (USP). Escola de Engenharia de São Carlos (EESC/SBD)
• Defense date: 2004-10-01

Examining board members

Mounir Khalil El Debs; Marcio Roberto Silva Correa; Joao Bento de Hanai; Angelo Rubens Migliore Junior; Ibrahim Abd El Malik Shehata

• Advisor: Mounir Khalil El Debs
• Field of knowledge: Engineering - Civil Engineering
• Indexed in: Banco de Dados Bibliográficos da USP-DEDALUS; Biblioteca Digital de Teses e Dissertações - USP
• Location: Universidade de São Paulo. Biblioteca da Escola de Engenharia de São Carlos; EESC/TESE

Abstract

This research presents a theoretical-experimental analysis of column-foundation connection through socket of precast concrete structures, with emphasis in pedestal walls. The experimental program included five models submitted to normal load with large eccentricity, changing the type and the condition of interface: three models had smooth interface and two models had rough interface. In two of smooth models, the bond was eliminated to represent the more appropriate situation of design. Two different configurations of shear keys were used in rough models. Numerical simulations, by finite elements method, were developed on the smooth models without bond, using physical and contact non-linear analyses, and on the rough socket connections, using physical non-linear analyses and perfect adherence of interfaces. The experimental results indicated the need to revalue the principal design methods for this connection. In that way, a design model was proposed for the smooth socket connection, considering friction between the interfaces, and the design of longitudinal walls was suggested as corbels. As it was verified the proximity of rough physical models behavior with a monolithic connection, its vertical reinforcings design was recommended, admitting the total transfer of the efforts. Numerical models had a good convergence and likeness with cracking and tensions field of physical prototypes, in spite of deformations have been smaller than experimental results. (AU)