不锈钢材料高温力学性能与本构模型  

Elevated temperature mechanical properties and constitutive model of stainless steel

作　　者：邢哲 全坤韬 毋凯冬 范圣刚[2] 王元清[3] XING Zhe;QUAN Kuntao;WU Kaidong;FAN Shenggang;WANG Yuanqing(College of Civil and Transportation Engineering,Hohai University,Nanjing 210024,China;School of Civil Engineering,Southeast University,Nanjing 211189,China;Department of Civil Engineering,Tsinghua University,Beijing 100084,China)

机构地区：[1]河海大学土木与交通学院,南京210024 [2]东南大学土木工程学院,南京211189 [3]清华大学土木工程系,北京100084

出　　处：《东南大学学报(自然科学版)》2025年第2期410-417,共8页Journal of Southeast University:Natural Science Edition

基　　金：国家自然科学基金资助项目(52208162);国家重点研发计划资助项目(2022YFA1604704).

摘　　要：不锈钢材料的高温力学性能是研究不锈钢结构抗火性能的基础。不锈钢作为一种高性能钢材,相较于普通碳钢,具有非线性强、无明显屈服点和屈服平台、应变硬化显著以及抗火性能优异等特性。基于一组不锈钢的高温材性试验,综合大量国内外不锈钢材料的高温力学性能试验结果,对不同牌号的不锈钢进行分组,并给出了较为准确的不锈钢材料力学性能的高温折减系数及相关计算公式。基于我国《不锈钢结构技术规程》(CECS 410—2015)中不锈钢材料的常温本构模型,提出了不锈钢材料的高温本构模型,并利用该组不锈钢材料的高温力学性能试验结果对模型的准确性加以验证。结果显示,该模型预测结果总体相对准确,可为我国后续不锈钢结构抗火性能的研究和设计提供参考依据。Elevated temperature mechanical properties of stainless steel is the basis of the research on fire behaviour of stainless steel structures.Stainless steel,as a type of high-performance steel,has characteristics of non-linearity,no obvious yield point and yield plateau,strain hardening and superior fire-resistance,compared with carbon steel.On the basis of a group of elevated temperature material tests of stainless steel combined with comprehensive elevated temperature material test results of stainless steel,stainless steels with different grades are classified and then the material properties of reduction factors and formula of stainless steel are proposed.The elevated temperature constitutive model is developed based on the room temperature constitutive model provided in the Technical Specification for Stainless Steel Structures(CECS 410—2015),which is assessed by the test results of that group of elevated temperature material tests of stainless steel in terms of accuracy.The results show that the prediction results of the model are relatively accurate,which can provide a reference for the further research and design of stainless steel structures in fire in China.

关 键 词：不锈钢 高温 材料力学性能 折减系数 本构模型 

分 类 号：TU511.3[建筑科学—建筑技术科学]