Finite element analysis of steel and composite top-and-seat and web angle connection

This paper presents a three-dimensional (3-D) analysis of steel and composite top-and-seat and web (TSW) angle connections to simulate structural responses so that their moment-rotation characteristics can be predicted. The reported research work is part of an ongoing project aimed at understanding connection behaviour under fire conditions. A general purpose finite element software MSCMARC was used to model the connections. Beam, column and angles were modelled using 4-noded shell elements and the concrete slab with 3D brick elements. The bolts and shear studs were also considered in the modelling. Due to a lack of elevated-temperature test data, the predictions from using the proposed 3-D model are compared with the ambient connection experimental data. The proposed 3-D model can predict accurate moment-rotation characteristics of connections which can be incorporated in analysis of global frame behaviour. The predicted connection response can also enrich the database of connection behaviour at ambient temperatures.