纹理构造对结构-砂界面力学特性的影响  

THE INFLUENCE OF GROOVE CONSTRUCTION ON THE MECHANICAL PROPERTIES OF THE STRUCTURE-SAND INTERFACE

作　　者：韩延吉 孟凡涛[2] HAN Yanji;MENG Fantao(Shandong Road and Bridge Construction Group Co.,Ltd.,Jinan 250000,China;Shandong Transport Vocational College,Shandong Weifang 261206,China)

机构地区：[1]山东省公路桥梁建设集团有限公司,济南250000 [2]山东交通职业学院,山东潍坊261206

出　　处：《低温建筑技术》2024年第5期36-40,共5页Low Temperature Architecture Technology

摘　　要：结构物表面纹理尺寸的设计直接影响到界面抗剪强度的发挥,研究纹理尺寸效应具有重要意义。文中利用改进的剪切装置研究了不同表面纹理形态的钢板与细砂间的宏观剪切表现,结果表明界面剪切应力与剪切位移的关系曲线可分为线性增长阶段、非线性增长阶段和稳定阶段;界面峰值剪切应力与纹理宽度成正比,与纹理深度的关系规律不明显,纹理尺寸与砂粒径的相对比值影响了界面剪切应力的发挥;不同纹理宽度和纹理深度条件下的界面摩擦角分别集中在25°~28°和26°~27°范围内,纹理深度2mm、纹理宽度3mm的界面抗剪强度最大。The surface groove size of structures directly affects the performance of interface shear strength,which is of great significance.This article employs an improved shear device to study the macroscopic shear performance be⁃tween steel plates with different surface groove shapes and fine sand.The results show that the relationship curve be⁃tween the interface shear stress and shear displacement can be divided into linear growth stage,nonlinear growth stage,and stable stage.The peak shear stress at the interface is directly proportional to the groove width,and the re⁃lationship with the groove depth is not obvious.The relative ratio of groove size to sand particle size affects the devel⁃opment of interface shear stress.The interface friction angles under different groove widths and depths are concen⁃trated in the range of 25°~28°and 26°~27°,respectively.The interface shear strength is highest at a groove depth of 2 mm and a groove width of 3 mm.

关 键 词：纹理宽度 纹理深度 峰值剪切应力 界面摩擦角 

分 类 号：TU473[建筑科学—结构工程]