基于当量时间的钢结构构件性能化耐火设计方法

T-equivalent for performance-based fire-resistantdesign method of steel structure element

对等面积当量时间和等温度当量时间进行了比较,结果表明,采用等温度当量时间进行钢构件的耐火设计能更好地反映真实火灾对构件的破坏程度,火灾荷载密度和通风系数是当量时间的主要影响因素。利用当量时间进行钢构件的耐火设计,与构件的实际工作情况更为接近。

Equal-area T-equivalent and Equal-temperature T-equivalent method were compared. Results showed that Equaltemperature T-equivalent for fire-resistant design can reflect the real fire damage to steel element better. Fire load density and ventilation coefficient are the main influence factors of Equivalent time. T-equivalent for fire-resistant design method is much closer to the actual work of steel element.