摘要
在结构物与土体相互作用的研究中,分析界面剪切特性并建立合理的本构关系具有重要意义。利用改进的直剪设备,对粉质黏土与光滑或粗糙界面钢之间的剪切性能进行试验,分析剪切应力-剪切位移关系和界面抗剪强度指标,依据Gompertz曲线模型和Clough-Duncan双曲线模型对试验结果进行拟合,结果表明:剪切应力随剪切位移增大而增加,达到峰值剪切应力后基本不变,未出现弱化现象;峰值剪切应力和峰值剪切位移均随法向应力和粗糙度的增加而增大;粗糙界面的黏聚力和摩擦角较光滑界面的更大;在法向应力较低的情况下,按Clough-Duncan双曲线模型和Gompertz曲线模型拟合效果均较好,在法向应力较高的情况下,Gompertz曲线模型拟合结果更合理。
Research on shear characteristics of inteaction between structure and soil is of great significance to analyze interfacial shear characteristics and establish reasonable constitutive relationship.The direct shear tests between silty clay and steel plate with smooth or rough interface were carried out with an improved direct shear equipment,the relationship between shear stress and shear displacement and interfacial shear strength indexes were analyzed,and the fitting relations by Gompertz curve model and Clough-Duncan hyperbolic model were established.The results showed that the shear stress increased with the increase of shear displacement,the peak shear stress was basically unchanged,there was no weakening phenomenon,and the peak shear stress and its displacement increased with the increase of normal stress and roughness for interface,and the cohensive forces and friction angles of rough interfaces were larger than that of smooth interfaces.Under the condition of low normal stress,both the fitting relations by Clough-Duncan hyperbolic model and the Gompertz curve model were all applicable,but it was more reasonable for the fitting raletion by Gompertz curve model under the condition of high normal stress.
作者
王瑞
郭聚坤
寇海磊
荣文涛
王虎
WANG Rui;GUO Jukun;KOU Hailei;RONG Wentao;WANG Hu(Civil Engineering Institute of Transportation,Shandong Jiaotong University,Jinan 250357,China;School of Highway and Architecture,Shandong Transport Vocational College,Weifang 261206,China;School of Highway,Chang’an University,Xi’an 710064,China;College of Engineering,Ocean University of China,Qingdao 266100,China)
出处
《工业建筑》
CSCD
北大核心
2019年第10期123-128,150,共7页
Industrial Construction
基金
国家自然科学基金项目(51879246,51408439)
潍坊市科技发展计划资助项目(2017GX083,2019GX087)
中国海洋大学青年英才工程计划项目(841717014)
山东省职业教育技艺技能传承创新平台(公路工程智慧检测技术传承创新平台)资助项目
作者简介
第一作者:王瑞,男,1996年出生,本科;通信作者:郭聚坤,gjk_1986@126.com。
