doi:10.3850/978-981-08-9247-0_rp069-icsas11

ABSTRACT

This paper presents the fire resistance of high strength steel (HSS) with tensile strength of 744 MPa to be used as tubular columns infilled with ultra high strength concrete with compressive strength of 180MPa. The tensile tests of HSS under high temperatures, as well as room temperature, were carried out in steady-state tensile tests. The comparisons with carbon steels in EN 1993-1-2:2005 (EC 3) indicate that HSS has smaller thermal elongations, but higher Elastic modulus. The strengths of HSS at different strain levels reduce faster than carbon steels at high temperatures. The critical temperatures were also compared and it was found that the critical temperature of HSS is about 50°C lower than that of carbon steels.

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