摘要
分别基于经典弹塑性理论和界面理论建立混凝土的本构模型,此两种模型都能保证在单调加载条件下应力-应变曲线是光滑的,在峰值点处严格遵守强度准则的要求,在下降段有稳定的变化趋势。能够描述从柔性到脆性的破坏过程中,体积压缩与膨胀的特性,与试验数据相比较,模拟的结果令人满意。并且通过对两种模型的模拟计算分析,提出了边界面模型与经典塑性力学模型的区别。
Two constitutive models for concrete,built respectively within the framework of elastoplastic and bounding surface theory,are presented.The models have properties as follows:stress-strain curve is smooth during monotonic loading;the stress at peak point obeys the law of strength;the variation has a steady trend even in the softening period.The material characteristics are influenced by the confining pressure,which displays a smooth transition from a ductile to brittle behavior.Volume compression and dilatancy can be well described.The results of numerical simulations are compared with the experiment data available in the literature.The difference between bounding surface model and elastoplastic model is presented,by means of simulation and computation of the two models.
出处
《工业建筑》
CSCD
北大核心
2006年第z1期875-879,共5页
Industrial Construction
关键词
弹塑性
边界面
本构关系
混凝土
elastoplastic constitutive relation concrete bounding surface
