【摘要】 基于动态损伤问题的势能原理基面力元法,利用再生混凝土随机圆骨料模型,针对应变率敏感性对再生混凝土动态力学性能的影响问题进行研究,讨论了不同应变率(10-5/s~10-2/s)下,再生混凝土立方体试件的应力—应变关系的变化规律。研究结果表明:随应变率的增大,试件的峰值应力、弹性模量逐渐增大,基面力元法可以用于模拟再生混凝土细观结构和宏观动态力学性能的关系。更多还原

【Abstract】 Based on the potential energy principle of dynamic damage,through the Base Force Element Method( BFEM),the effect of strain rate sensitivity on recycled concrete is studied with the random circular aggregate model,and the stress-strain relationship for recycled concrete cube specimens under the strain rates from 10-5/s to 10-2/s is discussed. The simulation results show that the peak stress and elastic modulus gradually increase with the strain rate,the peak strain change is not obvious,and the BFEM can simulate the relationship between the microstructure and the dynamic mechanical properties of regenerated concrete.更多还原