Analytical investigations of beam-column connections in precast buildings under seismic loads.

The critical point which defines behavior of precast buildings under cyclic loading is connections. The experience gathered from the past earthquakes together with existing analytical and experimental investigations are not sufficient enough to explain their seismic behavior. Therefore, experimental investigations of existing beam-column dowel connections were carried out by Slovenian researchers at the University of Ljubljana, (Fischinger at al, 2011). In parallel, analytical investigations of nonlinear behavior of the above beam-column connections under earthquake loading were realized at UKIM-IZIIS, Skopje (Apostolska, Necevska-Cvetanovska at al, 2011). Based on the above investigations, the numerical model for connection behavior is proposed. Presented in the paper are selected results from experimental and analytical research of the obtained response parameters for different types of beam-column connections under seismic action