基于钢筋粘结滑移模型的灌浆-锚杆界面力学性能分析
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摘要
为了研究锚杆-灌浆体系界面应力-应变关系,提高预应力锚杆锚固效应,运用前人提出的钢筋粘结滑移模型来模拟灌浆-锚杆之间力学性能。重点分析了锚杆全长范围内应力状态中的弹性阶段、弹性软化阶段两种应力状态下,锚杆沿杆长分布的轴力-位移关系。最后通过拉拔试验进行验证和校准,得出锚杆与灌浆界面的剪切力呈非线性力学特征,并与理论推导出的锚杆-灌浆界面切应力变化趋势一致,这对于研究锚杆围岩的受力和变形具有参考意义。
In order to study the stress-strain relationship at the interface between anchor and grouting and improve the anchoring effect of prestressed anchor. Reinforcement bonding model was proposed to simulate the mechanical properties between grouting and anchor. The axial force-displacement relationship of the anchor rod along the length of the rod under the two stress states of the elastic stage and elastic softening stage was analyzed emphatically. Finally, the tensile test was used to verify and calibrate that the shear force at the interface between grouting and grouting is non-linear and consistent with the trend of shear stress at the interface between grouting and grouting, which has the great significance for the research on the stress and deformation of rock.
In order to study the stress-strain relationship at the interface between anchor and grouting and improve the anchoring effect of prestressed anchor. Reinforcement bonding model was proposed to simulate the mechanical properties between grouting and anchor. The axial force-displacement relationship of the anchor rod along the length of the rod under the two stress states of the elastic stage and elastic softening stage was analyzed emphatically. Finally, the tensile test was used to verify and calibrate that the shear force at the interface between grouting and grouting is non-linear and consistent with the trend of shear stress at the interface between grouting and grouting, which has the great significance for the research on the stress and deformation of rock.
引文
[1]建筑边坡工程技术规范:GB 50330-2002[S].北京:中国建筑工业出版社,2002.
[2]铁路路基支挡结构设计规范:TB 10025-2001[S].石家庄:中国铁道出版社,2002.
[3]岩土工程预应力锚索设计与施工技术规范:GJB3635-1999[S].北京:中国标准出版社,1999.
[4]建筑基坑工程技术规范:YB 9285-97[S].北京:冶金出版社,1997.
[5]尤春安,战玉宝.预应力锚索锚固段的应力分布规律及分析[J].岩石力学与工程学报,2005(6):925-928.
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[7]程良奎.岩土锚固的现状与发展[J].土木工程学报,2001(3):7-12,34.
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[10]AHMET TEYMEN.Effect of mineral admixture types on the grout strength of fully-grouted rockbolts[J].Construction and Building Materials,2017,145:376-382.
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[15]尤春安.全长粘结式锚杆的受力分析[J].岩石力学与工报,2000,19(3):339-341.
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[17]CHEN J F,TENG J G.Anchorage strength models for FRP and steel plates bonded to concrete[J].Journal of Structural Engineering,2001,127(1):784-79.
[18]谢晶晶.纤维增强塑料筋锚杆锚固机理及设计方法的研究[D].郑州:郑州大学,2002.
[19]MINDLIN,RAYMOND D.Force at a point in the interior of a semi-inifnite solid[J].Physies,1936,17:195-202.
[20]YUAN H,TENG JG,SERACINO R,et al.Full-range behavior of FRP-to-concrete bonded joints[J].Engineering Structures,2004,26(5):553-65.
[21]CHEN W W,REN F F.Mechanical behavior of the bamboo-steel composite rockbolt:2006BAK30B02[R].Lanzhou:Dunhuang Academy&Cultural Relics Protection Center of Lanzhou University,2008.
[22]RONG G,ZHU H C,ZHOU C B.Testing study on working mechanism of fully grouted bolts of thread steel and smooth steel[J].Chinese Journal of Rock Mechanics and Engineering,2004,23(3):469-75.
[2]铁路路基支挡结构设计规范:TB 10025-2001[S].石家庄:中国铁道出版社,2002.
[3]岩土工程预应力锚索设计与施工技术规范:GJB3635-1999[S].北京:中国标准出版社,1999.
[4]建筑基坑工程技术规范:YB 9285-97[S].北京:冶金出版社,1997.
[5]尤春安,战玉宝.预应力锚索锚固段的应力分布规律及分析[J].岩石力学与工程学报,2005(6):925-928.
[6]徐祯祥.岩土锚固工程技术发展之回顾与展望[J].市政技术,2009,27(2):136-140,185.
[7]程良奎.岩土锚固的现状与发展[J].土木工程学报,2001(3):7-12,34.
[8]徐有邻.钢筋混凝土粘结滑移本构关系的简化模型[J].工程力学,1997(增刊):34-38.
[9]殷有泉.岩石力学与岩石工程的稳定性[M].北京:北京大学出版,2011:54-60.
[10]AHMET TEYMEN.Effect of mineral admixture types on the grout strength of fully-grouted rockbolts[J].Construction and Building Materials,2017,145:376-382.
[11]XU C,WANG G Z,LIANG Z Z,et al.Study on grout cracking and interface debonding of rockbolt grouted system[J].Construction and Building Materials,2017,135:665-673.
[12]周丞.地下工程预应力锚索施工技术研究[D].重庆:重庆交通大学,2011.
[13]XIAO S J,CHEN C F.Mechanical mechanism analysis of tension type anchor based on shear displacement method[J].Journal of Central South University,2008,15:106-111.
[14]弗洛林B A.土力学原理(第一卷)[M].北京:中国工业出版社,1965:132-140.
[15]尤春安.全长粘结式锚杆的受力分析[J].岩石力学与工报,2000,19(3):339-341.
[16]徐芝伦.弹性力学[M].北京:高等教育出版社,1998:73-78.
[17]CHEN J F,TENG J G.Anchorage strength models for FRP and steel plates bonded to concrete[J].Journal of Structural Engineering,2001,127(1):784-79.
[18]谢晶晶.纤维增强塑料筋锚杆锚固机理及设计方法的研究[D].郑州:郑州大学,2002.
[19]MINDLIN,RAYMOND D.Force at a point in the interior of a semi-inifnite solid[J].Physies,1936,17:195-202.
[20]YUAN H,TENG JG,SERACINO R,et al.Full-range behavior of FRP-to-concrete bonded joints[J].Engineering Structures,2004,26(5):553-65.
[21]CHEN W W,REN F F.Mechanical behavior of the bamboo-steel composite rockbolt:2006BAK30B02[R].Lanzhou:Dunhuang Academy&Cultural Relics Protection Center of Lanzhou University,2008.
[22]RONG G,ZHU H C,ZHOU C B.Testing study on working mechanism of fully grouted bolts of thread steel and smooth steel[J].Chinese Journal of Rock Mechanics and Engineering,2004,23(3):469-75.