Fire Performance of Undamaged and Pre-Damaged Welded Steel-Concrete Composite Beam-To-Column Joints with Concrete Filled Tubes

Abstract eng:
Major earthquakes in urban areas have often been followed by significant conflagrations that have been difficult to control and have resulted in extensive damage to property. Earthquakes then, increase the risk of loss of life if a fire occurs within a building. It is obvious therefore that a seismic-induced fire is a design scenario that should be properly addressed in any performance-based design, in locations where significant earthquakes can occur. In this paper both experimental and numerical results of undamaged and pre-damaged welded steel-concrete composite beam-to-column joints under fire are described as part of a European project aimed at developing fundamental data, design guidelines and prequalification of ductile and fire resistant composite beam-to-column joints. In detail, both the experimental program and fire experimental results are presented and discussed in this paper together with thermal numerical simulations on frames and joints. Both the experimental activity and the numerical work demonstrated the adequacy of the concurrent seismic and joint fire design.

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