Behavior of Connections between Hollow Section Steel Beam to Concrete Infilled

Abstract

Infilling concrete into hollow section steel columns is one of popular method to enhance the axial capacity of the members. The infilled concrete strength is typically higher than the specific value because the close section hollow steel is perfectly confined container. However, infilling concrete into the columns is not only enhance the axial capacity of the members but also affects to behavior of beam-to-columns. This paper aims to study about the influence of infilling concrete into the columns on the behavior of beam-to-column connections which the beam width is smaller than the column width. Cantilever tests of the studied beam-to-column connections are performed. Results show that initial stiffness of the connection with infilled concrete is increased about 2.5 time while moment capacity of the connection with infilled concrete is increased about 3.9 time compared to those without concrete.