一种高韧性水泥基复合材料单轴抗压应力-应变本构模型  

A Uniaxial Compressive Stress⁃strain Constitutive Model for Ultra⁃high Toughness Cement⁃based Composites

作　　者：彭胜 袁园 孙杰[1,2] 杨曌 朱红兵[1,2] 伍彩 PENG Sheng;YUAN Yuan;SUN Jie;YANG Zhao;ZHU Hongbing;WU Cai(College of Urban Construction,Wuhan University of Science and Technology,Wuhan,Hubei 430065,China;Urban Renewal Hubei Engineering Research Center,Wuhan,Hubei 430065,China;College of Civil Engineering,Hubei University of Engineering,Xiaogan,Hubei 432000,China)

机构地区：[1]武汉科技大学城市建设学院,湖北武汉430065 [2]城市更新湖北省工程研究中心,湖北武汉430065 [3]湖北工程大学土木工程学院,湖北孝感432000

出　　处：《水利与建筑工程学报》2023年第5期122-130,共9页Journal of Water Resources and Architectural Engineering

基　　金：湖北省自然科学基金资助项目(2022CFB662);湖北省高校优秀中青年科技创新团队计划项目(T202202);湖北省建设科技计划项目(202144);江汉大学精细爆破国家重点实验室开放基金(PBSKL2022D05)。

摘　　要：为研究纤维材料对高韧性水泥基复合材料抗压性能及应力-应变本构关系的影响,设计制作四组标准立方体试件,并对其进行抗压试验,观察试件受力的全过程和破坏形态。结果表明,高韧性水泥基复合材料抗压性能较普通混凝土均有一定程度的下降;在受压过程中,高韧性水泥基复合材料剥落量较少,破坏后仍能保持一个整体;钢纤维高韧性水泥基复合材料试件抗压强度较高。用已有本构模型对系数进行修正,提出高韧性水泥基复合材料应力-应变曲线修正模型,修正模型计算结果与试验结果吻合良好,能够较好预测高韧性水泥基复合材料抗压趋势。In order to analyze the influences of fiber materials on the compressive performance and stressstrain constitutive relations of high toughness cementitious composite,four sets of standard cube specimens were designed and made,and the compression tests were carried out.The whole process of loading and failure pattern of the specimen were observed.The results showed that the compressive performance of high toughness cementitious composites were lower to a certain extent than those of ordinary concrete.During the compression process,the high toughness cementbased composite material has less spalling and can still maintain a whole after failure.The specimens of steel fiber high toughness cementitious composite had higher compressive strength.By referring to the existing constitutive model,the coefficients were modified,and the calculated results of the modified stressstrain curve model for high toughness cementbased composites were compared with the experimental results.It can be used to predict the compressive strength of high toughness cementbased composites.

关 键 词：高韧性水泥基复合材料 聚乙烯醇纤维 钢纤维 聚乙烯纤维 抗压强度 应力-应变曲线 

分 类 号：TB332[一般工业技术—材料科学与工程]