带肋钢筋与堆石料接触面剪切特性
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摘要
设计了一种用于堆石料中筋材拉拔试验的试验装置,并开展了带肋钢筋在堆石料中的一系列拉拔试验,研究钢筋-堆石料接触面的剪切特性。试验结果表明:接触面的剪应力-剪切位移关系曲线均呈明显的非线性关系,形状类似于下端开口的抛物线;堆石料上覆压力对试验结果影响较大,随着上覆压力的增加,峰值和残余剪应力均逐渐增加,但峰值剪切位移逐渐减小。此外,基于损伤力学理论建立了一个接触面损伤本构模型,该模型能较好地模拟上覆压力对接触面剪切特性的影响,以及剪应力-剪切位移曲线的应变硬化、应变软化、残余状态等非线性特征。
A test device for the pullout test of reinforced bar in the rockfil has been designed. After that,a series of pullout tests for the ribbed steel bars in rockfill were carried out,and the shear characteristics of contact interface in the reinforced rockfill were studied. The experimental results show that the relationship curves between shear stress and shear displacement of the contact surface is obviously nonlinear,and the shape is similar to the parabola at the lower end. Meanwhile,the influence of overburden pressure on the test results is larger,and the peak and residual shear stress increases with the increase of overburden pressure,while the peak shear displacement decreases gradually. In addition,a damage constitutive model of contact surface is established based on the theory of damage mechanics,which can better simulate the influence of overlying pressure on the shear characteristics of contact surface and the nonlinear characteristics including the strain hardening,the strain softening and the residual state.
A test device for the pullout test of reinforced bar in the rockfil has been designed. After that,a series of pullout tests for the ribbed steel bars in rockfill were carried out,and the shear characteristics of contact interface in the reinforced rockfill were studied. The experimental results show that the relationship curves between shear stress and shear displacement of the contact surface is obviously nonlinear,and the shape is similar to the parabola at the lower end. Meanwhile,the influence of overburden pressure on the test results is larger,and the peak and residual shear stress increases with the increase of overburden pressure,while the peak shear displacement decreases gradually. In addition,a damage constitutive model of contact surface is established based on the theory of damage mechanics,which can better simulate the influence of overlying pressure on the shear characteristics of contact surface and the nonlinear characteristics including the strain hardening,the strain softening and the residual state.
引文
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[14]张嘎,张建民.粗粒土与结构接触面三维本构关系及数值模型[J].岩土力学,2007,28(2):288-292.(ZHANG Ga,ZHANG Jianmin.Three-dimensional model of intekface between structure and coarse grained soil[J].Rock and Soil Mechanics,2007,28(2):288-292.(in Chinese))
[15]曹文贵,王江营,翟友成.考虑残余强度影响的结构面与接触面剪切过程损伤模拟方法[J].土木工程学报,2012,45(4):127-133.(CAO Wengui,WANG Jiangying,ZHAI Youcheng.Study of simulation method for the shear deformation of rock structural planes and interfaces with consideration of residual strength[J].China Civil Engineering Journal,2012,45(4):127-133.(in Chinese))
[16]杨林德,刘齐建.土-结构物接触面统计损伤本构模型[J].地下空间与工程学报,2006,2(1):79-82.(YANG Linde,LIUQijian.Research on statistical damage model for soil structure interface[J].Chinese Journal of Underground Space and Engineering,2006,2(1):79-83.(in Chinese))
[17]夏红春,周国庆,商翔宇.基于Weibull分布的土-结构接触面统计损伤软化本构模型[J].中国矿业大学学报,2007,36(6):734-737(XIA Hongchun,ZHOU Guoqing,SHANG Xiangyu.Statistical damage softening constitutive model of soilstructure interface based on Weibull random distribution[J].Journal of China University of Mining&Technology,2007,36(6):734-737(in Chinese))
[18]王保田,周炳生,周天宝,等.基于统计损伤理论的锚杆受力全历程分析[J].河海大学学报(自然科学版),2018,46(4):314-321.(WANG Baotian,ZHOU Bingsheng,ZHOU Tianbao,et al.Analysis of the whole course for the force transferring mechanism in anchor bar based on statistical damage constitutive theory[J].Journal of Hohai University(Natural Sciences),2018,46(4):314-321.(in Chinese))
[19]郑山锁,张晓辉,黄威曾,等.多龄期钢框架时变损伤模型研究[J].地震工程学报,2018,40(3):389-397.(ZHENGShansuo,ZHANG Xiaohui,HUANG Weizeng,et al.Study on time-varying damage model of multi-age steel frame structures[J].China Earthquake Engineering Journal,2018,40(3):389-397.(in Chinese))
[2]LOPES M L,LADRIRA M.Influence of the confinement,soildensity and displacement rate on soil geogrid interaction[J].Geotextiles and Geomembranes,1996,14(10):543-554.
[3]MOHIUDDIN A.Ananysis of laboratory and field pull-out test of geosynthetics In clayed soils[D].Baton:Louisiana State University,USA,2003.
[4]王协群,张俊峰,邹维列.格栅-土界面抗剪强度模型及其影响因素[J].土木工程学报,2013,46(4):133-141.(WANGXiequn,ZHANG Junfeng,ZOU Weilie.A shear strength model of geogrid-soil interface and its influence factors[J].China Civil Engineering Journal,2013,46(4):133-141.(in Chinese))
[5]杨广庆,李广信,张保俭.土工格栅界面剪切特性试验研究[J].岩土工程学报,2006,28(8):948-952.(YANG Guangqing,LI Guangxin,ZHANG Baojian.Experimental studies on interface friction characteristics of geogrids[J].Chinese Journal of Geotechnical Engineering,2006,28(8):948-952.(in Chinese))
[6]徐超,廖星樾,叶观宝,等.土工合成材料界面摩擦特性的室内剪切试验研究[J].岩土力学,2008,29(5):1285-1289.(XUChao,LIAO Xingyue,YE Guanbao,et al.Research on interface frictional characteristics of geosynthetics[J].Rock and Soil Mechanics,2008,29(5):1285-1289.(in Chinese))
[7]JURAN I,GUERMAZI A,CHEN C L.et al.Modeling and simulation of load transfer in reinforced soil,part1[J].International Journal of Numerical Analysis and Methods in Geomechanics,1988,12(2):141-155.
[8]张绪涛,张强勇.土工直接拉伸试验装置的研制及应用[J].岩土工程学报,2014,36(7):1309-1315.(ZHANG Xutao,ZHANG Qiangyong.Development and application of geotechnical direct tensile test device[J].Chinese Journal of Geotechnical Engineering,2014,36(7):1309-1315.(in Chinese))
[9]吴海民,束一鸣.土工合成材料双向拉伸多功能试验机的研制与初步应用[J].岩土工程学报,2014,36(1):170-175.(WU Haimin,SHU Yiming.Geosynthetic materials development and preliminary application of two way stretch multi-function testing machine[J].Chinese Journal of Geotechnical Engineering,2014,36(1):170-175.(in Chinese))
[10]施建勇,李砚.糙面土工膜与无纺土工织物界面剪切强度及表面粗糙度变化规律[J].河海大学学报(自然科学版),2016,44(3):214-218.(SHI Jianyong,LI Yan.Interface shear strength of textured geomenbran with nonwoven geotextile and change pattern of surface asperity[J].Journal of Hohai University(Natural sciences),2016,44(3):214-218.(in Chinese))
[11]梁越,储昊,曾超.干湿循环作用下钢-土界面剪切特性试验[J].水利水电科技进展,2016,36(1):49-52.(LIANG Yue,CHU Hao,ZENG Chao.Experimental study on shear characteristics at steel-soil interface with drying-wetting cycles[J].Advances in Science and Technology of Water Resources,2016,36(1):49-52.(in Chinese))
[12]BERGADO D T,HARDIYATIMO H C,CISNEROS C B,et al.Pullout resistance of steel geogrids with weathered clay as back fill material[J].Geotechnical Testing Journal,1992,15(1):33-46.
[13]胡黎明,濮家骝.土与结构物接触面损伤本构模型[J].岩土力学,2002,23(1):6-11.(HU Liming,PU Jialiu.Damage model of soil-structure interface[J].Rock and Soil Mechanics,2002,23(1):6-11.(in Chinese))
[14]张嘎,张建民.粗粒土与结构接触面三维本构关系及数值模型[J].岩土力学,2007,28(2):288-292.(ZHANG Ga,ZHANG Jianmin.Three-dimensional model of intekface between structure and coarse grained soil[J].Rock and Soil Mechanics,2007,28(2):288-292.(in Chinese))
[15]曹文贵,王江营,翟友成.考虑残余强度影响的结构面与接触面剪切过程损伤模拟方法[J].土木工程学报,2012,45(4):127-133.(CAO Wengui,WANG Jiangying,ZHAI Youcheng.Study of simulation method for the shear deformation of rock structural planes and interfaces with consideration of residual strength[J].China Civil Engineering Journal,2012,45(4):127-133.(in Chinese))
[16]杨林德,刘齐建.土-结构物接触面统计损伤本构模型[J].地下空间与工程学报,2006,2(1):79-82.(YANG Linde,LIUQijian.Research on statistical damage model for soil structure interface[J].Chinese Journal of Underground Space and Engineering,2006,2(1):79-83.(in Chinese))
[17]夏红春,周国庆,商翔宇.基于Weibull分布的土-结构接触面统计损伤软化本构模型[J].中国矿业大学学报,2007,36(6):734-737(XIA Hongchun,ZHOU Guoqing,SHANG Xiangyu.Statistical damage softening constitutive model of soilstructure interface based on Weibull random distribution[J].Journal of China University of Mining&Technology,2007,36(6):734-737(in Chinese))
[18]王保田,周炳生,周天宝,等.基于统计损伤理论的锚杆受力全历程分析[J].河海大学学报(自然科学版),2018,46(4):314-321.(WANG Baotian,ZHOU Bingsheng,ZHOU Tianbao,et al.Analysis of the whole course for the force transferring mechanism in anchor bar based on statistical damage constitutive theory[J].Journal of Hohai University(Natural Sciences),2018,46(4):314-321.(in Chinese))
[19]郑山锁,张晓辉,黄威曾,等.多龄期钢框架时变损伤模型研究[J].地震工程学报,2018,40(3):389-397.(ZHENGShansuo,ZHANG Xiaohui,HUANG Weizeng,et al.Study on time-varying damage model of multi-age steel frame structures[J].China Earthquake Engineering Journal,2018,40(3):389-397.(in Chinese))
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