建筑用不锈钢的抗火性能

通过分析高温材料性能试验结果，描述了建筑用不锈钢在高温下的材料力学性能，并与建筑结构中常用的碳素钢及合金钢进行了比较.给出了不锈钢的弹性模量、屈服强度、抗拉强度等材料性能随温度折减的计算公式.提出了应变为应力函数的完整的不锈钢高温本构关系表达式，并与试验数据进行了比较.结果表明，与碳素钢和合金钢相比，不锈钢具有更为优越的抗火性能，在高温下不锈钢的材料性能折减系数更高；提出的计算公式基本正确地反映了不锈钢在高温下的材料性能折减规律；提出的本构关系表达式能够精确地描述不锈钢在高温下的完整应力 应变关系.

Behaviour of constructional stainless steel at elevated temperatures

Based on the test results,the material properties of constructional stainless steel at elevated temperatures were described and compared with those of constructional carbon steel and alloy steel.Equations for the reduction factors of elastic modulus,yield strength,ultimate strength and ultimate strain were proposed.In addition,the stress-strain curve equations for stainless steel at elevated temperatures based on Abdella's explicit stress formulation were also presented.The results showed that the stainless steel has relatively superior fire resistance ability and generally larger reduction factors of material properties than those of carbon steel and alloy steel at elevated temperatures.The predictions from the proposed reduction factor equations are generally in agreement with the test results.The proposed equations accurately predict the stress-strain curves of stainless steel at elevated temperatures.