非水反应高聚物喷涂材料的动力特性  

Dynamic Property of Non-water Reacted Polymer Spraying Materials

作　　者：孙博 郭成超 陈震 王雪珂[1,2,3,4] 王复明 SUN Bo;GUO Chengchao;CHEN Zhen;WANG Xueke;WANG Fuming(School of Civil Engineering,Sun Yat-Sen University,Guangzhou 510275,China;Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai),Zhuhai 519080,China;Guangdong Provincial Key Laboratory of Oceanic Civil Engineering,Sun Yat-Sen University,Guangzhou 510275,China;Guangdong Provincial Research Center for Underground Space Exploitation Technology,Sun Yat-Sen University,Guangzhou 510275,China)

机构地区：[1]中山大学土木工程学院,广东广州510275 [2]南方海洋科学与工程广东省实验室(珠海),广东珠海519080 [3]中山大学广东省海洋土木工程重点实验室,广东广州510275 [4]中山大学广东省地下空间开发工程技术研究中心,广东广州510275

出　　处：《建筑材料学报》2023年第5期492-498,共7页Journal of Building Materials

基　　金：“十四五”国家重点研发计划项目(2021YFB2600800);“十三五”国家重点研发计划项目(2018YFC1802303)。

摘　　要：基于扫描电镜和共振柱系统,研究了动剪应变、围压和密度对高聚物喷涂材料动力特性的耦合影响规律和机理.结果表明:随着动剪应变的增大,高聚物喷涂材料的动剪切模量呈线性减小,阻尼比增速先快后慢;相同密度条件下,围压越大,高聚物喷涂材料的动剪切模量越大,阻尼比越小;动剪应变、围压和密度对高聚物喷涂材料动剪切模量的耦合影响效应显著,围压和密度对其阻尼比的耦合影响效应显著;泡孔间的错动摩擦和对波动的传播衰减构成高聚物耗能机制,较高围压下,密度为0.250 g/cm3的高聚物喷涂材料表现出“耗能最优”.Based on scanning electron microscope and resonance column system,the regularity and mechanism of the coupling effects of dynamic shear strain,confining pressure,and density on the dynamic property of polymer spraying materials were studied.The results show that the dynamic shear modulus decreases linearly with the increase of dynamic shear strain,and the damping ratio first increases rapidly and then increases slowly.At the same density,the higher the confining pressure,the greater the dynamic shear modulus and the smaller the damping ratio of polymer spraying materials.The dynamic shear strain,confining pressure and density have significant coupling effects on the dynamic shear modulus of the polymer spraying materials,and the coupling effects of density and confining pressure on its damping ratio are significant.The staggered friction between bubbles and the propagation attenuation of waves constitute the energy consumption mechanism of polymer.Under high confining pressure,the polymer spraying material with the density of 0.250 g/cm3 shows“the best energy consumption”.

关 键 词：高聚物喷涂材料 动力特性 共振柱 动剪切模量 阻尼比 

分 类 号：TU411[建筑科学—岩土工程]