摘要
混凝土结构在外界因素如荷载、温度等作用下,将会产生应力和应变,根据损伤力学的概念,混凝土结构同时将会发生损伤并且产生损伤积累,从而导致材料性能不断劣化,最终产生宏观裂缝直至整个结构破坏.本文提出了一种损伤—应变耦合模型,可计算混凝土结构的损伤场随荷载变化的全过程.3点弯曲梁的算例表明,该模型的分析结果更符合混凝土结构的实际应力场和位移场变化情况,从而为复杂混凝土结构的损伤仿真分析研究奠定了基础.
Stress and strain are occurred in concrete structures under loading and temperature change. According to damage mechanics, damage is also appeared in concrete structures.Thus, the material properties of concrete may be degenerated,at last crack is appeared, and the structure is ruptured. In this paper, a simple damage_strain coupling model is established. The damage field of concrete structure is calculated under loading. An example of three_point bending beam shows that the analytical solution of present paper agrees well with the result of experiment. This work provides a sound background for analyzing the damage of complex concrete structures.
出处
《北方交通大学学报》
CSCD
北大核心
2003年第1期32-35,共4页
Journal of Northern Jiaotong University
基金
国家自然科学基金资助项目(59739180)
关键词
混凝土
损伤
仿真
耦合
3点弯曲梁
concrete
damage
simulation
coupling
three_point bending beam
