摘要
研究600MPa级新型抗震钢筋受力特性与本构模型.通过试验测试得到不同直径的600MPa级新型抗震钢筋的应力-应变全曲线.确定600MPa级新型抗震钢筋的屈服强度、抗拉极限强度、强屈比等强度指标;研究其弹性模量、断后伸长率、最大力总伸长率等变形指标.结果表明:600MPa级新型抗震钢筋具有良好的受力性能,其强度与变形指标均符合中国、美国、欧洲等国内外规范对抗震钢筋的要求.基于试验结果,给出600MPa级新型抗震钢筋拉伸本构关系的数学表达式和特征值.研究成果可为配置600MPa级新型抗震钢筋建筑结构中的设计、理论分析及受力钢筋数值模型的合理建立等提供试验依据.
The mechanical properties and constitutive models of 600 MPa seismic steel bar were studied. The complete stress-strain curves of 600 MPa seismic steel bar were obtained. Based on experimental research,strength parameters of 600 MPa seismic steel bar with different diameter,such as yield strength,tensile strength,and the ratio of tensile strength and yield strength were experimentally determined. Meanwhile,deformation parameters of 600 MPa seismic steel bar were also acquired from the test,including modulus of elasticity,percentage elongation after fracture percentage,and percentage total extension at maximum force. These experimental results confirm that 600 MPa seismic steel bars have good mechanical performance,and strength and deformation index such as can meet the requirement of codes of China,USA and Europe.According to experimental data,the mathematical expressions of tensile constitutive relation and eigenvalues for 600 MPa seismic steel bar were proposed. The research results can provide experimental basis for establishing reasonable steel bar model in structural design of building structures with 600 MPa seismic steel bar,theoretical analysis and numerical models.
作者
管俊峰
张谦
王丹
姚贤华
王伟夙
赵顺波
GUAN Junfeng1, ZHANG Qian2 WANG Dan1 YAO Xianhua1 WANG Weisu1 ZHAO Shunbo1(1. School of Civil Engineering and Communication, North China University of Water Resources and Electric Power, Zhengzhou 450045, China ; 2. School of Civil Engineering, Qinghai University, Xining 810016, Chin)
出处
《应用基础与工程科学学报》
EI
CSCD
北大核心
2018年第1期122-131,共10页
Journal of Basic Science and Engineering
基金
国家自然科学基金项目(51779095,51679092)
郑州市科技攻关项目(153PKJGG111)
青海省基础研究计划(2017-ZJ-766)
关键词
600MPa级新型抗震钢筋
应力-应变全曲线
力学特性
断后伸长率
最大力总伸长率
本构模型
600MPa seismic steel bar
stress-strain curves
mechanical properties
percentageelongation after fracture
percentage total extension at maximum force
constitutive model