摘要
采用Abaqus软件建立上翼缘垫板加强T形管节点的抗冲击非线性有限元模型,在模型试验验证的基础上,进行其抗冲击性能机理研究。通过分析上翼缘垫板加强对节点受冲击破坏模态的影响,同时通过对节点破坏机理的研究以及冲击力-变形关系曲线、能量耗散等抗冲击性能指标的分析,得出上翼缘垫板的局部加强机理为垫板将节点塑性区外移,降低节点域损伤,且加强垫板最佳厚度受节点屈曲相关性影响。此研究旨在为该类结构的抗冲击设计和修复加固提供参考。
Based on Abaqus software,the nonlinear finite element model of the upper flange plate reinforced T-shaped cold-formed steel tubular joints under impact loading was developed.Based on the verification with the test results,a numerical model was presented to analyze the impact mechanism of flange plate reinforced T-shaped steel tubular joints.The local reinforced mechanism of cover plate that reduced connection zone damage by relocating the plastic zone outward can be obtained by analyzing the cover plate's effect on impact failure mode,and the impact resistance indexes such as impact-deformation curve,energy dissipation.The optimum thickness of cover plate is affected by the complex buckling correlation of the reinforced connection zone.The numerical analysis in the paper could serve a useful reference for the anti-impact design and strengthening design of the steel tubular structures.
出处
《中国科技论文》
CAS
北大核心
2015年第1期10-15,20,共7页
China Sciencepaper
基金
高等学校博士学科点专项科研基金资助项目(20130161110018)
教育部新世纪优秀人才计划资助项目(NCET-11-0123)
关键词
管节点
垫板加强
抗冲击
有限元
破坏机理
能量耗散
steel tubular joint
backing plate reinforcement
impact resistant
finite element
failure mechanism
dissipated energy
