Thermal and axial compression behaviour of full-scale concrete-filled steel-tube columns (RCFST) exposed to fire: Experimental Study

This paper presents experimental results of fire and compression tests 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 paper, full details about the test procedure, thermal field, load-displacement curves and main remarks about the results are given. In particular, this research work pre-sents the results of five tests for thermal field measurements, that consider four specimens heated in a gas fur-nace in standard fire conditions (ISO 834) and one specimen heated in an electric furnace in non-standard conditions. Also, the study presents the results of six axial compressive tests. In association to this work, three other papers are presented. In the first companion paper, the results of standard thermal tests are discussed and a numerical-experimental comparison is proposed. In the second companion paper, the results of residual compression tests are discussed and an analytical-experimental comparison is proposed. In the third compan-ion paper, the results of non-standard thermal test and a “hot” condition compression test are discussed. Also, a numerical-experimental and an analytical-experimental comparisons are proposed for non-standard thermal tests and “hot” condition compression test respectively