Abstract:

A full-process analytical proposed,in which the effect of expl bility of the program is validated by parameters on the fire resistances of program for high-strength concrete columns subjected to high temperature is osive spalling of high-strength concrete is approximately considered.The relia-the test results of other researchers．In order to reveal the effects of the main high-strength concrete columns.480 specimens with different axial loading ratios,cross-section dimensions,reinforcement ratios and load eccentricity ratios are selected to analyze the high-tem-perature reaction of the high·strength concrete columns.The results are then compared with those of common con-crete columns.Moreover,a simplified way to quantitatively determine the fire resistance of high-strength concrete columns is presented based on the simulated results.It is indicated that the explosive spalling has significant influence on the fire resistance of high-strength concrete columns,and that the fire resistance of the high-strength concrete columns with both central axial loading and eccentric axial loading can be effectively improved by reducing the axial loading ratio and the load eccentricity ratio,and by increasing the cross-section dimension.

Key words: high-strength concrete, column, high temperature, fire resistance, explosive spalling