摘要
根据已有的资料和试验参数,分别采用三点弯曲梁和楔入式紧凑拉伸试件,利用有限元方法分析了混凝土裂缝尖端的应力、应变之间关系,以及裂缝口张开位移与试验结果进行对比分析,数据比较吻合,验证了模拟计算的合理性.根据以上结果,计算了带裂缝混凝土构件的损伤场,得到了裂缝发展中缝端的起裂损伤和失稳损伤.
Based on existing data and test data, the experimental researches on three-point bending beam and wedging compact tension specimens are carried out; and then the relationships between stress and strain of concrete crack tip are analyzed by using the finite element method; and crack mouth opening displacement （CMODc） is obtained. The results calculated by the finite element method are consistent with ones of the ex- periments. Obviously, the numerical consequences are reasonable. According to above results of numerical simulation, the damage field of the concrete structure with cracks is calculated; and the crack fracture damage and instability damage are obtained. The simulation results from the perspective of damage play an important guiding role in analysis of crack stability in engineering.
出处
《三峡大学学报（自然科学版）》
CAS
2014年第3期75-78,87,共5页
Journal of China Three Gorges University：Natural Sciences
基金
国家自然科学基金(50878077)
"十一五"国家科技支撑计划(2008BAB29B03)
关键词
混凝土
损伤
有限元
起裂损伤
失稳损伤
concrete
damage
finite elements
initial damage
instability damage
