摘要
本文完成了应变率由１０－５ｌ／ｓ—１０２ｌ／ｓ７个数量级范围内的混凝土受压试验，发现应变率不同的全过程曲线具有很好的相似性，峰值应力和峰值应变随应变率的增加有所提高，但弹性模量基本不变．在此基础上，建立了考虑不可逆应变影响的损伤本构模型，其计算结果与实验吻合较好．
In this paper,the complete process of concrete under compression with different strian rate from 10 -5 l/s to 10 2l/s has been investigated.It has been found that the stress strain curves in the process with different strain rate are somewhat similar,with the peak stress and peak strain increase when the strain rate increases.While the elastic modulus does not changed.Based on the internal variable theory and damage mechanics,a damage constitutive model considering the effect of irreversible strain is then proposed.It can describe the mechanical propertics of concrete under different strain rate when the changes of peak strain were considered. The analytical results are in good agreement with the experimental date.
出处
《水利学报》
EI
CSCD
北大核心
1997年第7期72-77,共6页
Journal of Hydraulic Engineering
基金
国家杰出青年科学基金
国家教委跨世纪优秀人才专项基金
