工程科学学报2017，Vol.39Issue(9)：1428-1435,8.DOI:10.13374/j.issn2095-9389.2017.09.017
HTRB600级高强钢筋高温下的力学性能
Mechanical properties of high-strength HTRB600 steel bars under high temperature
摘要
Abstract
Tensile testing of HTRB600 steel bars under high temperature was conducted to determine the mechanical properties of the steel under high temperature. The elastic modulus, proportional limit, yield strength, ultimate strength, and stress-strain curves of steel bars at 20, 200, 300, 400, 500, 600, 700, and 800℃ were obtained. The experimental results show that the elastic modu-lus, proportional limit, yield strength, and ultimate strength of the bars obviously decrease with increasing temperature. The yield strength, ultimate strength, proportional limit, and elastic modulus of the steel bars at 500 and 800℃ decrease to less than 50% and 10%, respectively, of those of the sample at room temperature. The stress-strain curve of the steel bars smoothens as the temperature increases, and the yield terrace disappears at 200℃. The degree of decrease in yield strength and ultimate strength of the 600 MPa steel bar is obviously larger than that of the <500 MPa steel bar. Finally, a simplified calculation method to determine the stress-strain curve of HTRB600 steel bars under high temperature was proposed.关键词
HTRB600高强钢筋/高温下/力学性能/简化计算模型Key words
HTRB600 high-strength steel bar/under high temperature/mechanical properties/simplified calculation method分类
建筑与水利引用本文复制引用
公伟,胡克旭,王懿迪..HTRB600级高强钢筋高温下的力学性能[J].工程科学学报,2017,39(9):1428-1435,8.基金项目
国家自然科学基金资助项目(51478362) （51478362）
