Analysis of composite steel and concrete columns at high temperatures

Abstract

The growing demand for knowledge about the effect of fire on structures has stimulated research worldwide. This article presents experimental results of short, composite columns made of steel and concrete when submitted to high temperatures in furnaces, with and without axial compression loading, as well as a numerical analysis of the temperature distribution in these columns. The columns were modeled as concrete-filled tubes with three thicknesses and two diameters considered. In addition, standard fire temperature-time curves were obtained experimentally for use in the numerical calculations.

An experimental study of damage characteristics at bond of RC after microwave heating

“…The residual compressive strength agreed with the residual bond GRAĐEVINAR 73 (2021) 2, 107-117 An experimental study of damage characteristics at bond of RC after microwave heating strength of S420a and S500a, whereas the residual flexural strength agreed with the residual bond strength of S220a. To sum up, although many research activities are currently conducted on the demolition of reinforced concrete structures, there are still many shortcomings that hinder wider use [18][19][20][21]. As a systematic crushing and dismantling method, microwaveassisted machinery is not only applicable to rock breaking [22,23] but can also be applied to the demolition in narrow urban spaces and to the demolition of special reinforced concrete structures.…”