冲击爆炸荷载下UHPC动态本构模型研究现状  

UHPC dynamic constitutive model under impact and explosion load:a state of the art review

作　　者：杜闯 刘晓彤 李艳艳 宋帅 高启辉 DU Chuang;LIU Xiaotong;LI Yanyan;SONG Shuai;GAO Qihui(School of Civil Engineering and Transportation,Hebei University of Technology,Tianjin 300401,China)

机构地区：[1]河北工业大学土木与交通学院,天津300401

出　　处：《混凝土》2024年第11期51-54,60,共5页Concrete

基　　金：河北省高等学校科学研究项目(ZD2022140);国家自然科学基金委员会面上项目(52278254)。

摘　　要：混凝土动态本构模型是冲击爆炸荷载作用下数值模拟准确性的关键。现有的混凝土动态本构模型都是基于普通混凝土而构建的,不能直接应用于超高性能混凝土(Ultra-high Performance Concrete,简称UHPC)。目前缺乏广泛接受的针对UHPC材料的动态本构模型。回顾了基于不同理论和试验的各种普通混凝土动态本构模型,对目前UHPC材料的动态本构模型的研究现状进行了综述,最后对UHPC动态本构模型进行了分析。分析表明:目前研究的UHPC动态本构模型理论上都是一种损伤塑性本构模型,目前研究的UHPC动态本构模型实际上是对已有普通混凝土动态本构模型的一种改进。这也是构建UHPC本构模型的思路,关键是如何结合UHPC材料力学特性开展研究。同时,指出了UHPC动态本构模型研究的不足,为进一步建立适合于UHPC动态本构模型提供参考。The dynamic constitutive model of concrete is the key to the accuracy of numerical simulation under impact and explosion loads.The existing dynamic constitutive models of concrete are based on ordinary concrete and cannot be directly applied to ultra-high performance concrete(UHPC)materials.Currently,there is a lack of widely accepted dynamic constitutive models for UHPC materials.It reviews various dynamic constitutive models for ordinary concrete based on different theories and experiments,summarizes the current research of dynamic constitutive models for UHPC materials,and finally analyzes the dynamic constitutive models for UHPC materials.The analysis shows that the current UHPC dynamic constitutive models are theoretically a damage plastic constitutive model,and the current UHPC dynamic constitutive model is actually an improvement on the existing ordinary concrete dynamic constitutive model.It also the idea of constructing a UHPC constitutive model,and the key is how to combine the mechanical properties of UHPC materials.At the same time,the shortcomings of UHPC dynamic constitutive model research are pointed out,providing a reference for further establishing suitable UHPC dynamic constitutive model.

关 键 词：超高性能混凝土 钢纤维 动态本构模型 数值模拟 

分 类 号：TU528.01[建筑科学—建筑技术科学]