不同地域沙漠砂贫混凝土的抗压性能及单轴压缩本构模型  

Mechanical properties and stress-strain constitutive models of desert sand concrete in different regions

作　　者：关英林 邹承君 康亚明 杨宝平 GUAN Yingin;ZOU Chengjun;KANG Yaming;YANG Baoping(School of Chemistry and Chemical Engineering,North Minzu University,Yinchuan 750021,China;School of Electromechanical Engineering,North Minzu University,Yinchuan 750021,China;Ningxia Yueyuan Engineering Co.Ltd.,Ningxia Guyuan 750000,China)

机构地区：[1]北方民族大学化学与化学工程学院,银川750021 [2]北方民族大学机电工程学院,银川750021 [3]宁夏跃元工程有限公司,宁夏固原750000

出　　处：《内蒙古工业大学学报（自然科学版）》2024年第1期63-69,共7页Journal of Inner Mongolia University of Technology：Natural Science Edition

基　　金：国家自然科学基金项目(515369001);北方民族大学校企联合横向项目(2102000247)。

摘　　要：选取毛乌素沙漠砂、三沙源沙漠砂和宁夏沙湖附近沙漠砂,分别配制了三种不同配合比的沙漠砂贫混凝土,并对其抗压性能进行了研究,结果表明,随着水泥含量的提高,沙漠砂贫混凝土的强度和刚度随之提高,峰值应变也逐渐增大;在相同配合比下,宁夏沙湖沙漠砂贫混凝的强度和刚度相对较大,三沙源沙漠砂贫混凝土的峰值应变和耗能系数相对较大,毛乌素沙漠砂贫混凝土峰后曲线较为平缓,说明其在破坏后仍具有一定的延性特征。通过与三种普通混凝土本构模型的对比,并利用Origin对实验数据进行拟合,提出了适用于沙漠砂贫混凝土的本构模型。In this study,three kinds of desert sand concrete with different mixing ratios were prepared by selecting Maohuusu desert sand,Sanshayuan desert sand and desert sand near Ningxia Sand Lake,and their compressive properties were investigated.The results show that with the increase of cement content,the strength and stiffness of desert sand concrete increase,and the peak strain also increases gradually;under the same ratio,the strength and stiffness of Ningxia Sand Lake desert sand concrete are relatively larger,and the peak strain and energy dissipation coefficient of Sanshayuan desert sand concrete are relatively larger;the post-peak curve of Maohuusu desert sand concrete is relatively flat,which indicates that it still has certain ductility characteristics after damage.By comparing with the three ordinary concrete constitutive models and fitting the experimental data with Origin,the constitutive model applicable to desert sand concrete is proposed.

关 键 词：沙漠砂 抗压性能 沙漠砂贫混凝土 应力-应变曲线 本构模型 

分 类 号：TU451[建筑科学—岩土工程]