高温度における建築用鋼材の力学的性質に関する研究

概要

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In order that the temperature fields calculated with reference to an external thermal effect produced by a fire on a steel or reinforced concrete structure or a structural part may be interpreted in terms of the load-bearing capacity available at different instants throughout the duration of the fire, it is required to possess detailed information which shows how the strength and deformation properties of the structural materials vary with the temperature in the temperature range associated with the fire. In this paper, the strength and deformation properties of two kinds of mild structural steels under the action of tensile loads in the temperature range 20 to 600℃ are shown. The following test specimens are prepaired. Steel Grade Test Specimen Mark Heat Treatment SS41 SS41-A no heat treatment SS41 SS41-B normalising, 900℃, 1/2 hour WEL-TEN60 WEL-TEN60-A no heat treatment WEL-TEN60 WEL-TEN60-B annealing, 500℃, 1 hour Fig. 8 to 11 show how the stress-strain diagrams of mild structural steels change with the temperature, and Fig. 12 to 23 illustrate the variations in the tensile strength, in the modulus of elasticity, in the 0.2 per cent yield strength, in the proportional limit, in the elongation, and in the reduction of area, with the temperature.
社団法人日本建築学会の論文
1971-07-30