周期荷载作用下土钉支护的累积效应有限元分析
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摘要
针对交通荷载下土钉支护边坡的力学特征,将交通荷载简化为循环荷载,以室内模型试验为基础,基于Mohr-Coulomb准则,建立土钉支护动力稳定分析的弹塑性平面应变有限元模型,加载频率为2Hz,加载幅值为10～30kPa。研究结果表明:坡面位移随循环加载次数增加而增大,出现明显的累积效应,坡顶沉降出现沉降槽,累积效应不明显;土钉轴力的变化与位置有关,在动载下,靠近坡顶的轴力增加较大,但随着循环加载次数增加出现衰减效应,下部土钉轴力变化不大;室内模型试验结果与数值模拟结果存在一致性。
According to the mechanism of soil nailing, traffic load was simplified as cyclic load, an elasto-plastic finite element model was set up under dynamic load based on Mohr-Coulomb criterion, with frequency of 2 Hz and load intensity of 10-30 kPa. The results show that the displacement of panel increases with the increase of cyclic load number, indicating obvious accumulative effect. The shape of settlement of slope crest is half-bowl with unobvious accumulative effect. Axial force of soil nails has obvious increment at upper position, whereas no distinct increment at lower position, and the increment shows attenuation with cyclic number. The experimental results are in accordance with the simulated ones.
According to the mechanism of soil nailing, traffic load was simplified as cyclic load, an elasto-plastic finite element model was set up under dynamic load based on Mohr-Coulomb criterion, with frequency of 2 Hz and load intensity of 10-30 kPa. The results show that the displacement of panel increases with the increase of cyclic load number, indicating obvious accumulative effect. The shape of settlement of slope crest is half-bowl with unobvious accumulative effect. Axial force of soil nails has obvious increment at upper position, whereas no distinct increment at lower position, and the increment shows attenuation with cyclic number. The experimental results are in accordance with the simulated ones.
引文
[1]陈肇元,崔京浩.土钉支护在基坑工程中的应用[M].2版.北京:中国建筑工业出版社,2000.CHEN Zhao-yuan,CUI Jing-hao.Applications of soil nailing in pits[M].2nd ed.Beijing:China Architecture&Building Press,2000.
[2]GJB5055—2006,土钉支护技术规范[S].GJB5055—2006,Technical specifications for soil nailed support[S].
[3]曾宪明,杜云鹤,李世民.土钉支护抗动载原型与模型对比试验研究[J].岩石力学与工程学报,2003,22(11):1892-1897.ZENG Xian-ming,DU Yun-he,LI Shi-min.Testing study of prototype and model comparison on resisting dynamical load with soil nail supporting[J].Chinese Journal of Rock Mechanics and Engineering,2003,22(11):1892-1897.
[4]张宗领.复合土钉支护施工过程及地震作用下的有限元分析[D].兰州:兰州理工大学土木工程学院,2007.ZHANG Zong-lin.The FEM analysis of composite soil nailed wall in construction process and earthquake action[D].Lanzhou:School of Civil Engineering,Lanzhou University of Technology,2007.
[5]董建华,朱彦鹏.地震作用下土钉支护边坡稳定性分析[J].中国公路学报,2008,21(6):20-25.DONG Jian-hua,ZHU Yan-pen.Stability analysis of slope supported by soil nailing retaining wall under earthquake[J].China Journal of Highway and Transport,2008,21(6):20-25.
[6]喻晓今,余学文,张豫.数种情形下土钉的瞬态应变累积效应分析[J].华东交通大学学报,2006,23(4):1-4.YU Xiao-jin,YU Xue-wen,ZHANG Yu.Analysis of the effect of cumulation of transient strain on soil nail in several cases[J].Journal of East China Jiaotong University,2006,23(4):1-4.
[7]赵延庆,贾渝,曹荣吉.交通荷载轴载谱参数的确定及分析[J].中外公路,2007,27(2):185-188.ZHAO Yan-qing,JIA Yu,CAO Rong-ji.Determination and analysis of axle load and its spectrum under traffic load[J].Journal of China&Foreign Highway,2007,27(2):185-188.
[8]颜可珍,夏唐代,姜爱华.交通荷载作用下地基中瑞利波的传播特性[J].岩土力学,2004,25(增刊2):414-417.YAN Ke-zhen,XIA Tang-dai,JIANG Ai-hua.Characteristics of rayleigh wave in soils generated by traffic load[J].Rock and Soil Mechanics,2004,25(Suppl.2):414-417.
[9]冯冰,杨临弟.文县杨木材物理力学性质试验分析[J].甘肃林业科技,2006,31(1):12-14.FENG Bing,YANG Lin-di.Experimental research on the timber physic mechanics character of Wenxian poplar[J].Journal of Gansu Forestry Science and Technology,2006,31(1):12-14
[10]祝方才,廖新贵,李建华.循环荷载下非饱和重塑土土钉支护边坡的模型试验研究[J].岩石力学与工程学报,2009,28(增1):2994-3000.ZHU Fang-cai,LIAO Xin-gui,LI Jian-hua.Laboratory model test of soil nailed wall under cyclic load in unsaturated compacted soils[J].Chinese Journal of Rock Mechanics and Engineering,2009,28(Suppl1):2994-3000.
[11]Jahanandish M,Keshavarz A.Seismic bearing capacity of foundations on reinforced soil slopes[J].Geotextiles and Geomembranes,2005,23(1):1-25.
[12]TAO Lian-jin,JIANG De-yi,ZHANG Zhuo-yuan.Dynamic discrete element method and its application in rock mass engineering[J].Transaction of Nonferrous Metals Society of China,2000,10(6):842-846.
[13]许瑾,郑书英.边界元法分析边坡动态稳定性[J].西北建筑工程学院学报:自然科学版,2000,17(4):72-75.XU Jin,ZHENG Shu-ying.The slope dynamic stability analysis by BEM[J].Journal of North West Institute of Architecture Engineering:Natural Sciences,2000,17(4):72-75.
[14]Meschke G,Helnwein P.Large-strain3D-analysis of fibre-reinforced composite using rebar elements:Hyperelastic formulation for cords[J].Computational Mechanics,1994,13(4):241-254.
[15]潘昌实.隧道力学数值方法[M].北京:中国铁道出版社,1995.PAN Chang-shi.Numerical methods of tunnel mechanics[M].Beijing:China Railway Press,1995.
[16]张明聚.土钉支护工作性能的研究[D].北京:清华大学土木水利学院,2000:107-108.ZHANG Ming-ju.Research on behaviors of soil nailing[D].Beijing:School of Civil Engineering,Tsinghua University,2000:107-108.
[17]王立峰,朱向荣.土钉墙面层位移和内力的计算分析[J].岩土力学,2008,29(2):437-441.WANG Li-feng,ZHU Xiang-rong.Analysis of displacement and inner force in soil-nailing walls[J].Rock and Soil Mechanics,2008,29(2):437-441.
[18]龚晓南.土钉和复合土钉支护若干问题[J].土木工程学报,2003,36(10):80-83.GONG Xiao-nan.Some problems on soil nailing and composite soil nailing[J].China Civil Engineering Journal,2003,36(10):80-83.
[19]杨林德,李象范,钟正雄.复合型土钉墙的非线性有限元分析[J].岩土工程学报,2001,23(2):149-152.YANG Lin-de,LI Xiang-fan,ZHONG Zheng-xiong.The nonlinear analysis of FEM on composite soil-nailed retaining wall[J].Chinese Journal of Geotechnical Engineering,2001,23(2):149-152.
[2]GJB5055—2006,土钉支护技术规范[S].GJB5055—2006,Technical specifications for soil nailed support[S].
[3]曾宪明,杜云鹤,李世民.土钉支护抗动载原型与模型对比试验研究[J].岩石力学与工程学报,2003,22(11):1892-1897.ZENG Xian-ming,DU Yun-he,LI Shi-min.Testing study of prototype and model comparison on resisting dynamical load with soil nail supporting[J].Chinese Journal of Rock Mechanics and Engineering,2003,22(11):1892-1897.
[4]张宗领.复合土钉支护施工过程及地震作用下的有限元分析[D].兰州:兰州理工大学土木工程学院,2007.ZHANG Zong-lin.The FEM analysis of composite soil nailed wall in construction process and earthquake action[D].Lanzhou:School of Civil Engineering,Lanzhou University of Technology,2007.
[5]董建华,朱彦鹏.地震作用下土钉支护边坡稳定性分析[J].中国公路学报,2008,21(6):20-25.DONG Jian-hua,ZHU Yan-pen.Stability analysis of slope supported by soil nailing retaining wall under earthquake[J].China Journal of Highway and Transport,2008,21(6):20-25.
[6]喻晓今,余学文,张豫.数种情形下土钉的瞬态应变累积效应分析[J].华东交通大学学报,2006,23(4):1-4.YU Xiao-jin,YU Xue-wen,ZHANG Yu.Analysis of the effect of cumulation of transient strain on soil nail in several cases[J].Journal of East China Jiaotong University,2006,23(4):1-4.
[7]赵延庆,贾渝,曹荣吉.交通荷载轴载谱参数的确定及分析[J].中外公路,2007,27(2):185-188.ZHAO Yan-qing,JIA Yu,CAO Rong-ji.Determination and analysis of axle load and its spectrum under traffic load[J].Journal of China&Foreign Highway,2007,27(2):185-188.
[8]颜可珍,夏唐代,姜爱华.交通荷载作用下地基中瑞利波的传播特性[J].岩土力学,2004,25(增刊2):414-417.YAN Ke-zhen,XIA Tang-dai,JIANG Ai-hua.Characteristics of rayleigh wave in soils generated by traffic load[J].Rock and Soil Mechanics,2004,25(Suppl.2):414-417.
[9]冯冰,杨临弟.文县杨木材物理力学性质试验分析[J].甘肃林业科技,2006,31(1):12-14.FENG Bing,YANG Lin-di.Experimental research on the timber physic mechanics character of Wenxian poplar[J].Journal of Gansu Forestry Science and Technology,2006,31(1):12-14
[10]祝方才,廖新贵,李建华.循环荷载下非饱和重塑土土钉支护边坡的模型试验研究[J].岩石力学与工程学报,2009,28(增1):2994-3000.ZHU Fang-cai,LIAO Xin-gui,LI Jian-hua.Laboratory model test of soil nailed wall under cyclic load in unsaturated compacted soils[J].Chinese Journal of Rock Mechanics and Engineering,2009,28(Suppl1):2994-3000.
[11]Jahanandish M,Keshavarz A.Seismic bearing capacity of foundations on reinforced soil slopes[J].Geotextiles and Geomembranes,2005,23(1):1-25.
[12]TAO Lian-jin,JIANG De-yi,ZHANG Zhuo-yuan.Dynamic discrete element method and its application in rock mass engineering[J].Transaction of Nonferrous Metals Society of China,2000,10(6):842-846.
[13]许瑾,郑书英.边界元法分析边坡动态稳定性[J].西北建筑工程学院学报:自然科学版,2000,17(4):72-75.XU Jin,ZHENG Shu-ying.The slope dynamic stability analysis by BEM[J].Journal of North West Institute of Architecture Engineering:Natural Sciences,2000,17(4):72-75.
[14]Meschke G,Helnwein P.Large-strain3D-analysis of fibre-reinforced composite using rebar elements:Hyperelastic formulation for cords[J].Computational Mechanics,1994,13(4):241-254.
[15]潘昌实.隧道力学数值方法[M].北京:中国铁道出版社,1995.PAN Chang-shi.Numerical methods of tunnel mechanics[M].Beijing:China Railway Press,1995.
[16]张明聚.土钉支护工作性能的研究[D].北京:清华大学土木水利学院,2000:107-108.ZHANG Ming-ju.Research on behaviors of soil nailing[D].Beijing:School of Civil Engineering,Tsinghua University,2000:107-108.
[17]王立峰,朱向荣.土钉墙面层位移和内力的计算分析[J].岩土力学,2008,29(2):437-441.WANG Li-feng,ZHU Xiang-rong.Analysis of displacement and inner force in soil-nailing walls[J].Rock and Soil Mechanics,2008,29(2):437-441.
[18]龚晓南.土钉和复合土钉支护若干问题[J].土木工程学报,2003,36(10):80-83.GONG Xiao-nan.Some problems on soil nailing and composite soil nailing[J].China Civil Engineering Journal,2003,36(10):80-83.
[19]杨林德,李象范,钟正雄.复合型土钉墙的非线性有限元分析[J].岩土工程学报,2001,23(2):149-152.YANG Lin-de,LI Xiang-fan,ZHONG Zheng-xiong.The nonlinear analysis of FEM on composite soil-nailed retaining wall[J].Chinese Journal of Geotechnical Engineering,2001,23(2):149-152.
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