Estudo teórico-experimental da ligação pilar-fundação por meio de cálice em estruturas de concreto pré-moldado / Theoretical-experimental analysis of column-foundation connection through socket of precast concrete structures

AUTOR(ES)
DATA DE PUBLICAÇÃO

2004

RESUMO

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.

ASSUNTO(S)

concreto pré-moldado colarinho shear key chave de cisalhamento experimental research investigação experimental simulação numérica ligação numerical simulation cálice de fundação connection pedestal walls precast concrete socket base

ACESSO AO ARTIGO

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