- 摘 要
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李国强 陈 凯 蒋首超 殷颖智
(同济大学 上海 200092)[提要] 主要对我国建筑钢结构中常用的Q345钢进行了高温下的材料性能试验。试验得到的数据有:应力-应变关系曲线、屈服强度、极限强度、弹性模量和延伸率。根据试验结果得到了可用于理论分析的高温钢材模型,并与其他国家推荐的高温钢材模型进行了比较。
[关键词] 高温试验 材料性能 材料模型Expcrimcntal studics on the high-tcmpcrature matcrial propcrtics of Q345 stccl which is widcly uscd in stccl structurcs arc carricd out. The tcst data include strcss-strain curve, yicld strcngth, tcnsile strcngth, moduius of ciasticity and clongation. Bascd on the data of the tcsts, the mathcmatical modcl for prcdicting the propcrtics of Q345 stccl at clcvatcd tcmpcraturcs is prcscntcd. In addition,a comparison bctwccn the high tcmpcrature modcl for Q345 stccl proposcd and the modcls for gcncral stccl proposcd in the codcs of scvcral othcr countrics has bccn madc.
Keywords: high-tcmpcraturc; cxpcrirncnt; matcrial propcrty; matcrial modcl