RCFST columns exposed to fire: Non-standard thermal test and 'hot' compression test results discussion

摘要

This paper presents a discussion on the experimental results of the 'hot' condition compression test performed on full-scale fire-exposed, Reinforced Concrete-Filled Steel Tubes (RCFST) and Reinforced Concrete (RC) short columns (outer diameter 457 mm and length 1600 mm). In the companion papers, full details about the test procedure, thermal field load-displacement curves are provided. In particular, that research work presents the results of five tests for thermal field measurements, that consider four specimens heated in a gas furnace in standard fire conditions (ISO 834) and one specimen heated in an electric furnace in non-standard conditions; the results of six axial compressive tests are also given. In this paper, the results of non-standard thermal tests and a 'hot' condition compression test are discussed. Also, numerical-experimental and analytical-experimental comparisons are proposed for non-standard thermal tests and 'hot' condition compression test, respectively.