摘要
恒阻大变形(CRLD)锚索已广泛应用于许多边坡的预警和加固。为了分析恒阻大变形锚索的恒阻力,根据恒阻器的形状和尺寸,将其看作类似厚壁圆筒问题进行处理。厚壁圆筒问题不同于经典拉梅和薄壁圆筒两种问题,研究时需考虑径向应力及切应力对恒阻力的影响,为此建立三维弹塑性力学模型进行分析求解。若引入平面应变假设,则该三维解析模型回归为二维经典拉梅公式。为验证此方法的合理性,进行三组恒阻大变形锚索的拉伸实验,并将三维弹塑性模型所得恒阻力值与二维弹塑性模型及拉伸试验结果进行对比,三维弹塑性力学模型的解更接近室内实验力值,该模型可用于估算各种型号CRLD锚索的恒阻力值,并可为其优化设计提供理论支持。
Constant-resistance-large-deformation（CRLD） cables have been widely applied in a large number of slopes for monitoring and reinforcement. In order to analyze the constant resistance of the CRLD cable,it is considered as a thick-walled cylinder problem according to the shape and the dimension of the pipe. Differing from the classical Lame equation and thin-walled cylinder issues,this study took into account the effects of axial and shear stresses,and established a 3-dimensional elasto-plastic analytical model. The 3D analytical model became the Lame equation in 2D under the plane strain assumption. In order to verify this analytical model,static tension tests were performed to 3 samples with different geometric parameters. The experimental results were compared with 2D and 3D analytical models. The calculated results with 3D model was close to the experimental data. The 3D analytical model can be used to estimate the constant resistance of different CRLD cables and for optimal design.
作者
吕谦
陶志刚
李兆华
何满潮
安文博
LV Qian;TAO Zhigang;LI Zhaohua;HE Manchao;AN Wenbo(School of Mechanics and Civil Engineering, China University of Mining and Technology, Beijing 100083, China;State Key Laboratory for Geomeehanics and Deep Underground Engineering, China University of Mining and Technology, Beoing 100083, China;Shandong Geotechnical Investigation and Design Institute, Yantai, Shandong 264001, China)
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2018年第4期792-800,共9页
Chinese Journal of Rock Mechanics and Engineering
基金
国家自然科学基金资助项目(41502323)~~
关键词
边坡工程
CRLD锚索
吸能锚杆
厚壁圆筒
静力拉伸试验
三维弹塑性力学模型
slope engineering
CRLD cables
energy-absorbing cables
thick-walled cylinder problem
statictension test
3D elasto-plastic analytical model
作者简介
吕谦（1987-），男，2009年毕业于河北工业大学电气及其自动化专业，现为博士研究生，主要从事边坡监测、预警和锚杆力学性能方面的研究工作。E-mail：lvqian1009@126.com。;通讯作者：李兆华（1985-），男，博士现任讲师。E-mail：lizheng6224166@126.com
