Behaviour of T-stub connection to concrete-filled circular column with blind bolts and extensions

Abstract

This paper presents the results of an experimental and analytical investigation into the structural behaviour of an innovative moment-resisting connection to concrete-filled circular hollow sections using Ajax blind bolts. A large-scale T-stub connection with full instrumentation was tested to failure in tension. The favourable strength and stiffness characteristics of this type of connection showed that it could be an alternative to the conventional welded moment connections.A three dimensional finite element (FE) model was developed to simulate the behaviour of blind-bolted T-stub connections. The FE model took into account material nonlinearities, geometrical discontinuities and complex c..