非水反应高聚物–混凝土界面单调剪切特性及本构模拟  

Constitutive Simulation and Interfacial Shear Characteristics of Non-water Reaction Polymer and Concrete

作　　者：王钰轲 于博文 曹天才 郭成超 钟燕辉[1,2,3] 石明生 WANG Yuke;YU Bowen;CAO Tiancai;GUO Chengchao;ZHONG Yanhui;SHI Mingsheng(College of Water Conservancy Sci.and Eng.,Zhengzhou Univ.,Zhengzhou 450001,China;National Local Joint Eng.Lab.of Major Infrastructure Testing and Rehabilitation Technol.,Zhengzhou 450001,China;Collaborative Innovation Center of Water Conservancy and Transportation Infrastructure Safety Protection,Zhengzhou 450001,China;School of Civil Eng.,Sun Yat-sen Univ.,Guangzhou 510275,China)

机构地区：[1]郑州大学水利科学与工程学院,河南郑州450001 [2]重大基础设施检测修复技术国家地方联合工程实验室,河南郑州450001 [3]水利与交通基础设施安全防护河南省协同创新中心,河南郑州450001 [4]中山大学土木工程学院,广东广州510275

出　　处：《工程科学与技术》2021年第6期122-131,共10页Advanced Engineering Sciences

基　　金：国家重点研发计划项目(2019YFC1510803);国家自然科学基金项目(52178369;52109140);河南省重大科技专项(181100310400);国家铁路集团公路科技研究开发计划重大课题(K219G032)。

摘　　要：土与结构物的界面力学性质一直都是岩土工程探究的热点,为了探究非水反应高聚物与混凝土的界面剪切特性,基于单调直接剪切试验研究了竖向应力、剪切速率对高聚物–混凝土界面抗剪强度和剪切模量等特性的影响。结果表明:在给定的竖向应力与剪切速率下,随着剪切位移的增加,高聚物–混凝土界面呈现出剪切软化的现象。剪切速率对界面抗剪强度、黏聚力、摩擦角影响较小,对界面剪切模量值有显著影响,并且剪切模量值随着剪切速率的增加不断减小,减小幅值明显;竖向应力对高聚物–混凝土界面抗剪强度以及剪切模量值有显著影响,高聚物–混凝土界面抗剪强度、剪切模量值随着竖向应力的增加而不断增加。最后,建立了高聚物–混凝土界面的双曲线本构模型,并依据相关试验结果初步验证了模型的有效性。The mechanical properties of the interface between soil and structure have always been a hot topic in geotechnical engineering.In order to explore the interfacial shear characteristics of non-water reaction polymer and concrete,the effects of vertical stress and shear rate on shear strength and shear modulus of polymer concrete interface were studied based on monotonic direct shear test.The experimental results showed that:under the given vertical stress and shear rate,with the increase of shear displacement,the polymer concrete interface presented shear softening phenomenon.The shear rate had little effect on the interfacial shear strength,cohesion and friction angle,but had a significant impact on the interfacial shear modulus,and the shear modulus value decreased with the increase of shear rate,and the decrease amplitude was obvious;the vertical stress had a significant impact on the shear strength and shear modulus of polymer concrete interface,and the shear strength and shear modulus of polymer concrete interface changed with the increase of shear rate.The vertical stress increased continuously.At the same time,the hyperbolic constitutive model formula of polymer concrete interface was systematically deduced,and the validity of the model was preliminarily verified according to the relevant experimental results.

关 键 词：高聚物 界面剪切特性 抗剪强度 剪切模量 本构模型 

分 类 号：TU375.4[建筑科学—结构工程]