Le unioni a secco tra elementi prefabbricati in c.a.: i risultati di un'indagine sperimentale

Dry connections are typically used in precast structures to connect different types of precast elements. They have been also introduced in column- to-column and column-to-foundation joints, allowing for faster installation of precast columns and reduction of foundation dimensions and represent an efficient alternative to the classic solution which uses monolithic columns to be connected to precast plinths. Actually the classic solution is hardly used when the columns are so high that both their transportation and installation are difficult. The paper concerns the results obtained in an experimental campaign which has been performed to investigate the behavior of dry connections for precast columns in presence of both static and cyclic loads. Particularly their ductility and energy dissipation capacity have been investigated for their use in seismic areas, where the behavior of precast structures depends mainly on the seismic behavior of joints. The research is part of a wider experimental program involving other Italian Universities with the aim of investigating the static and dynamic behavior (in presence of seismic actions) of dry connections used to link not only column segments but also other precast elements (beams, panels, etc.).