Title:
Behavior of Socket Base Connections Emphasizing Pedestal Walls
Author(s):
Rejane Martins Fernandes Canha, Mounir Khalil El Debs, Kenneth de Borja Jaguaribe Jr., and Ana Lucia Homce de Cresce El Debs
Publication:
Structural Journal
Volume:
106
Issue:
3
Appears on pages(s):
268-278
Keywords:
connection; friction; pedestal walls; precast concrete; shear key; socket base.
DOI:
10.14359/56491
Date:
5/1/2009
Abstract:
To evaluate the main design models for socket base connections of precast concrete structures, an experimental investigation was carried out on specimens of this connection with smooth and rough interfaces in contact with cast-in-place concrete. The specimens consisted of pedestal walls and were submitted to loads with large eccentricities. Based on the experimental results, two rational design models are proposed for this connection. One of these models accounts for the friction and is applied to socket bases with smooth interfaces. The main behavior model was verified for sockets with this type of interface and the design of the longitudinal walls as corbels is also suggested in this case. Because the behavior of the rough interface specimens was very close to a monolithic connection, the other proposed model is an adaptation of the bending theory to calculate the vertical reinforcement of socket bases with rough interfaces.