轴心受压高强度钢构件抗火性能研究
首发时间:2010-01-13
摘要:为了得到高强度钢基本构件的抗火性能,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力构件在高温下的临界应力,进而得到高强度钢轴心受力构件高温下整体稳定系数与临界温度,可供工程设计采用。将高强度钢和普通钢轴心受力构件在高温下的稳定系数和临界温度进行了对比,结果表明:普通钢轴心受力构件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力构件,高强度钢轴心受力构件整体稳定系数比普通钢低。使用有限元方法对本文给出的高强度钢轴心受力构件的整体稳定系数进行了验证,二者得出的结果吻合较好。
关键词: 高强度钢 轴心受力构件 抗火性能 整体稳定 临界温度
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Fire-resistance Study of High-strength-steel Columns Subjected to Axial Compression
Abstract:In order to investigate the fire-resistance of high-strength-steel fundamental members,by introducing the mechanical properties of high-strength-steel at elevated temperature, critical stress of high-strength-steel column subjected to axial compression at elevated temperature is deduced. Moreover, coefficient of globe stability and critical temperature for high-strength-steel column subjected to axial compression is obtained and which can provide a reference for design. The comparison of globe stability coefficient and critical temperature between high-strength-steel and normal steel is made. The results show that the globe stability coefficient and critical temperature for normal steel is not applicable for high-strength-steel and the globe stability coefficient for high-strength-steel is smaller than for normal steel. The finite element analysis is carried out to validate the globe stability coefficient obtained in the paper and good agreement is found between them.
Keywords: high-strength-steel axial compression column fire resistance globe stability critical temperature
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