NONLINEAR FINITE ELEMENT ANALYSIS ON SLIT T STEEL CONNECTIONS

摘要

In practice most connections of steel frames actually show semi-rigid deformation behavior that can contribute substantially to overall displacements of the structure and to the distribution of member forces. So it is very necessary that studying the behavior of these semi-rigid connections. Full-scale model of the slit T steel connections using H-section member had been analyzed using ANSYS. The objective of the work is to determine the behavior of slit T steel connections under monotonic loading well into the inelastic range and to ascertain the effect of design parameters such as column flange stiffener, pre-tension of bolts and the slit T steel flange thickness on the overall behavior. Observations were made concerning the response of the connection and its elements in terms of strength, stiffness and energy dissipation. It is concluded that slit T steel connections can possess the relative high stiffness, strength and excellent ductility as moment-resisting components in the seismic design of frames. Some of the input energy was dissipated in the flange of slit T steel and the column participated some in the energy dissipation process in the computing. The slit T steel stiffness (the thickness of the flange) is the most important factor, which has crucial influence on the behavior of connections.