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Effects of Connections on Composite Frames

by N. Jarrett, Building Research Station,
T. Lennon, Building Research Station,



Document Type: Proceeding Paper

Part of: Composite Construction in Steel and Concrete II

Abstract:

This paper summarizes the preliminary findings from an experimental and theoretical study of the influence of composite connections on frame behaviour. The first part of the work included tests on cruciform and cantilever assemblages incorporating different bare steel connections and reinforcement details. The tests emphasized the difference between actual connection behaviour and current design assumptions and showed that many composite connections have only limited rotation capacity. To investigate the effects of connections on composite frame behaviour, a theoretical frame analysis was carried out incorporating the experimental connection moment rotation curves. A simple composite sub-frame was analyzed using a computer program developed at BRE and verified by two full scale sub-frame tests. The research programme is still at an early stage, but results indicate that common forms of connection have very different affects on composite frame behaviour at both service and ultimate design loads.

Subject Headings: Structural behavior | Connections (structural) | Structural analysis | Steel structures | Composite structures | Frames | Composite materials

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