摘要
根据能量耗散等价假设对二维平面应力问题,建立了单轴拉伸与双轴拉伸情况下混凝土宏观损伤变量与细观损伤参数(微裂纹密度)的关系.在双轴拉伸情况下,材料破坏时微裂纹密度为一定值,与σ1和σ2的变化无关;但破坏时的宏观损伤值随横向拉应力的增大而增大.
The relationships between macroscopic damage variabls and microscopic damage parametes for concrete under uniaxial and biaxial tension stresses are derived based on the equivalence principle of energy dissipation. The mi-crocrack density parameter at ultimate stress is almost a constant value,and is irrelevant to the biaxial stress ratio,but the maximum longitudinal macroscopic damage increases with the increase of lateral stress.
出处
《三峡大学学报（自然科学版）》
CAS
2004年第2期154-156,共3页
Journal of China Three Gorges University：Natural Sciences
