Q890高强结构钢高温蠕变性能  

Creep Behavior of Q890 High-Strength Structural Steel at Elevated Temperature

作　　者：王谋渊 吴晚博 曾翔[1] 曹宝珠[1] Wang Mouyuan;Wu Wanbo;Zeng Xiang;Cao Baozhu(College of Civil Engineering and Architecture,Hainan University,Haikou 570228,China)

机构地区：[1]海南大学土木建筑工程学院,海南海口570228

出　　处：《海南大学学报（自然科学版）》2022年第1期76-83,共8页Natural Science Journal of Hainan University

基　　金：海南省重大科技计划(ZDKJ201803)。

摘　　要：为了解Q890高强结构钢在高温下的蠕变性能,在恒温恒载下对Q890高强结构钢进行了高温蠕变试验研究,试验参数包括温度(400℃、500℃、600℃和700℃)与应力比(0.45~0.95).通过试验,得到了各个温度及应力比下Q890钢的蠕变-时间曲线及蠕变速率-时间曲线,并对其进行了分析.基于蠕变速率-时间曲线,划分了Q890钢高温蠕变过程的发展阶段.最后,利用蠕变试验数据拟合了Field&Field蠕变模型的参数,拟合得到的蠕变模型与Q890高强钢的试验曲线吻合良好.In order to understand the creep behavior of Q890 high-strength structural steel at elevated temperature,in the report,the high-temperature creep tests of Q890 steel were performed under the condition of constant temperature and constant load.The parameters included temperature(400℃,500℃,600℃,and700℃)and stress ratio(0.45-0.95).The creep versus time curves and creep rate versus time curves were obtained,and the data were analyzed.Based on the creep rate versus time curves,three stages of creep development at elevated temperature were determined.Finally,the parameters of the Field&Field creep model were acquired by fitting the test results,and the Field&Field creep model for Q890 steel at elevated temperature is in accordance with the experimental curves.

关 键 词：Q890高强钢 高温蠕变试验 高温蠕变曲线 高温蠕变模型 

分 类 号：TU392[建筑科学—结构工程]