摘要
高强钢材工程应用广泛,但其焊接接头处存在脆性断裂倾向。因此,文中针对Q460高强钢母材、焊缝、热影响区进行了系列低周疲劳材性试验,基于Chaboche本构理论,识别了各类Q460高强钢等向-随动混合强化材性参数,可用于准确模拟Q460高强钢缺口材性试件荷载-位移滞回曲线,为高强钢构件、节点及体系的性能研究提供技术支撑。
With the popularization of high strength steelin the actual project, brittle fatigue tendency becomes an inevitable problem around its welded connections. Therefore, a series of low-cycle fatigue experiments are conducted on the high strength base material, welds and heat affected zone of Q460 high-strength steel. Additionally, based on the Chaboche constitutive theory, the combined isotropic-kinematic hardening parameters of various Q460 high-strength steels are identified, which can be used to accurately simulate the load-displacement hysteretic curves of notched specimens. Research results of this paper can provide technical support for members,joints and structures made of Q460 high-strength steel.
作者
张丽
邱晨
邢佶慧
ZHANG Li;QIU Chen;XING Jihui(China Railway Huatie Engineering Design Group Co.,Ltd.,Beijing 100071,China;School of Civil Engineering,Beijing Jiaotong University,Beijing 100044,China)
出处
《低温建筑技术》
2020年第8期19-23,共5页
Low Temperature Architecture Technology
基金
国家自然科学基金面上项目(51878029,51578045)。
