Behaviour of hybrid stainless-carbon steel composite beam-column joints

Abstract

Concrete-filled steel tubular (CFST) columns have been widely used in high-rise building structure due to its excellent structural properties such as high strength, high stiffness, high ductility and large energy absorption capacity. For this reason, the combined use of CFST columns and steel beams in composite building construction is increasing. Conventionally, welded connections are often used to connect steel beams to CFST columns. Such connections are very costly and also require on-site welding. In recent years, blind-bolted connections have been developed to simplify the in-situ installation procedure, while allowing the connection to maintain good structural performance. Although extensive studies have been conducted on steel beam-CFST column joints without slab, the opposite is true for steel beam-CFST column joints with slab. As a result, the development of blind-bolted connections is still in its infancy stage. The main objective of this study is to develop reliable connection between steel beams and CFST columns using blind bolts and to provide detailed information from experimental and numerical investigations, using mathematical models for predicting the initial rotational stiffness and moment-rotation relationship of blind-bolted connections in steel beam-CFST column joints with slab.

Date of Award	2016
Original language	English