Residual capacity of fire-exposed concrete-filled steel hollow section columns

摘要: Abstract Concrete filled steel hollow structural (CFS) sections are an increasingly popular means to support large compressive loads in buildings. Whilst the response of unprotected CFS during a fire is reasonably well researched, their post-fire residual performance less established. A better understanding fire-damaged columns needed enable performance-based engineering buildings incorporating sections. This paper presents compression tests on and protected along with control six unheated The confirm that as maximum exposed temperature within cross-section increases, strength capacity, ductility axial–flexural stiffness decrease. data subsequently used assess ability predict capacity after fires, using available material models in-fire ambient models.