西南交通大学学报2017，Vol.52Issue(6)：1075-1081,7.DOI:10.3969/j.issn.0258-2724.2017.06.006
高温作用后混凝土损伤动态本构模型研究
Analysis of Dynamic Damage Constitutive Model for Concrete Exposed to High Temperature
王飞 1钱永久 1许金余 2李志武3
作者信息
- 1. 西南交通大学土木工程学院,四川成都610041
- 2. 空军工程大学工程学院机场建筑工程系,陕西西安710038
- 3. 西北工业大学力学与土木建筑学院,陕西西安710072
- 折叠
摘要
Abstract
To fill a gap in the field of dynamic constitutive model research of concrete,a dynamic damage constitutive model for concrete was established based on a nonlinear viscoelastic constitutive model and damage mechanics,while considering the effect of damage on the mechanical properties of the material.The proposed dynamic damage constitutive model contained nine parameters such as material parameters and modulus of elasticity.High temperature is considered to directly influence the material parameters of the model,and these model parameters were obtained for various temperatures by fitting the experimental stress-strain curves.The comparison of stress-strain curves between the model predictions and experimental results shows that the error of peak stress,peak strain,and modulus of elasticity is less than 5％,9％,and 7％,respectively,and the fitting similarities are greater than 0.93.Consequently,the model can be used to simulate the mechanical behavior of concrete after exposure to high temperatures.关键词
固体力学/动态本构模型/霍普金森压杆/混凝土/高温后/损伤Key words
solid mechanic/dynamic constitutive model/split Hopkinson pressure bar/concrete/after high temperature exposure/damage分类
数理科学引用本文复制引用
王飞,钱永久,许金余,李志武..高温作用后混凝土损伤动态本构模型研究[J].西南交通大学学报,2017,52(6):1075-1081,7.
