Seismic response of unbraced steel frames

Abstract In the analysis and design of unbraced steel frames various models are employed to represent the behaviour of beam‐to‐column connections. In one such model, termed here as ‘Simple Construction’, pinned connections are assumed when resisting gravity loads, whereas the same connections are assumed to be moment‐resistant rigid connections when resisting lateral loads due to an earthquake or wind. Such connections are designed for moments …