轴心受压高强度H型钢柱抗火性能

Fire-resistance performance of high-strength-steel H shaped columns under the axial compression

引入高强度钢高温下的力学性能参数,推导了高强度钢轴心受压柱在高温下的临界应力,进而得到高温下整体稳定系数与临界温度。将高强度钢和普通钢轴心受压柱在高温下的稳定系数和临界温度进行了对比,结果表明:普通钢轴心受压柱高温下的整体稳定系数和临界温度不适用于高强度钢轴心受压柱,高强度钢轴心受压柱整体稳定系数比普通钢低。使用有限元方法对文中给出的高强度钢轴心受压柱的整体稳定系数进行了验证,二者得出的结果吻合较好。

In order to investigate the fire-resistance performance of high-strength-steel column,this paper deduces the critical stress of high-strength-steel columns under the axial compression at high temperature by introducing the mechanical properties of high-strength-steel at high temperature. Moreover,coefficients of overall stability and critical temperature for high-strength-steel column under the axial compression are obtained which can provide a reference for design. The comparison of overall stability coefficient and critical temperature between high-strength-steel and normal steel is made. The results show that the overall stability coefficient and critical temperature for normal steel is not applicable for high-strength-steel,and the overall stability coefficient for high-strength-steel is smaller than that for normal steel. The paper uses the finite element analysis to validate the overall stability coefficient,and good match was found between them.