某大型深埋罐室围岩和混凝土试验及本构模型研究  

Study on Test and Constitutive Model of a Large Deep Buried Tank Surrounding Rock and Concrete

作　　者：谢全敏[1] 刘文文 晏理想 XIE Quan-min;LIU Wen-wen;YAN Li-xiang(School of Civil Engineering and Architecture,Wuhan University of Technology,Wuhan 430070,China;Organization Department of Huanggang CPC Municipal Committee,Huanggang 438021,China)

机构地区：[1]武汉理工大学土木工程与建筑学院,武汉430070 [2]中共黄冈市委组织部,黄冈438021

出　　处：《武汉理工大学学报》2024年第3期48-55,共8页Journal of Wuhan University of Technology

摘　　要：目前的材料动态本构模型还不能很好地真实反映大型深埋罐室的混凝土和玄武岩动态损伤力学特性,为此,采用MTS实验和SHPB实验对某大型深埋罐室支护衬砌混凝土和围岩玄武岩性能进行了试验研究。结果表明,混凝土为塑性剪切破坏形式,而玄武岩为脆性碎裂破坏形态;随着冲击荷载应变率不断增大,混凝土和玄武岩的破坏均由碎块状逐渐过渡为粉末状,玄武岩在抵抗冲击载荷下能力高于混凝土;混凝土具有较强的延展性,呈现出非脆性破坏,而玄武岩呈现出脆性破坏;玄武岩及混凝土的动态应力增长因子DIF随应变率的增大而增大,DIF与应变率呈良好的线性关系。基于动弹模量,对朱-王-唐的动态损伤本构模型参数进行了简化,构建了混凝土和玄武岩峰值应力前的动态损伤本构模型,并结合SHPB实验数据验证了该动态损伤本构模型的合理性,研究成果为后续的大型深埋罐室的抗爆特性研究提供了理论支持。In order to study the anti-explosion characteristics of a large deep buried tank house,the current dynamic constitutive model of materials can not really reflect the dynamic damage mechanical characteristics of concrete and basalt of the large underground tank house.Therefore,MTS and SHPB experiment were used to support the tank chamber lining concrete and the surrounding rock basalt respectively.The results shows that the concrete is plastic shear failure,while the basalt is brittle fracture failure,and the yield stress,peak strain,elastic modulus and Poisson's ratio are obtained.Through SHPB experimental device,the dynamic performance test of lining supporting concrete and tank chamber surrounding basalt was carried out,and the sample failure state and failure rule at different impact strain rate are obtained.The dynamic stress growth factor DIF of basalt and concrete increases with the strain rate,and the good linear relationship between DIF and strain rate.Based on the dynamic modulus,the parameters of Zhu-Wang-Tang's dynamic damage constitutive model are simplified,and the dynamic damage constitutive model of concrete and basalt before the peak stress is constructed,and the rationality of this dynamic damage constitutive model is verified by SHPB experimental data.The research results provide theoretical support for the subsequent research on the anti-explosion characteristics of large deep buried tanks.

关 键 词：大型深埋罐室围岩及混凝土 MTS实验 SHPB实验 破坏规律 动态应力增长 动态损伤模型 

分 类 号：O347.1[理学—固体力学]