Earticle

The PCS system, which consists of precast concrete column and steel beam, is a kind of composite structural systems. In this paper, experimental study and Nonlinear finite element analysis is conducted to predict the structural behavior of precast concrete column and steel beam connected by using bolted connections. Based on experimental results from the seismic testing of eight interior PCS specimens, it shows that the PCS system is satisfied with seismic performance criteria of ACI such as strength deterioration, stiffness degradation and energy dissipation capacity except initial stiffness. In order to investigate cause of initial stiffness loss, we experiment one specimen applied symmetry monotonic loading and perform 3-D finite element analysis using the nonlinear FE program, ABAQUS. Analysis is stiffer than testing result, but we estimate testing results using the GAP element.

The ultimate capacity of end-plate connection is investigated through nonlinear finite element analysis. The example models are divided into stiffened case and unstiffened one. The refined finite element models are analyzed by utilizing a general purpose structural analysis computer program ADINA and the moment-rotation relationships of the connection are determined. The results are compared with the regression equation deduced by Krishnamurthy. It is planned to deduce a bilinear regression equation through a parametric study on various dimensions of the connection.