深层调蓄排水盾构隧道管片接头预埋件抗拉试验三维数值模拟研究
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摘要
文章基于上海市深层调蓄排水盾构隧道管片接头预埋件抗拉试验进行数值模拟,研究适用于该隧道管片接头力学性能分析的数值方法。通过应用混凝土塑性损伤模型及非线性弹簧,建立了考虑接头预埋件的复杂形状和混凝土与锚筋粘接滑移作用的三维精细化数值模型。另外,单独建立三种不同精细化程度的预埋件模型并进行简单加载,通过比较计算结果并综合考虑计算花费时间与计算精度,确定了整体模型中所采用的预埋件简化形式。混凝土与锚筋之间采用非线性弹簧约束模拟钢筋与混凝土之间的粘结滑移作用,并且建立了锚筋与混凝土之间采用绑定约束和面-面接触的对比模型,三类模型均按照试验工况进行加载,并将数值计算结果与试验结果对比。结果表明,相比较于"面-面接触模型"及"绑定约束模型",考虑钢筋混凝土粘结滑移作用的"非线性弹簧模型"与试验结果更加吻合,模型也能很好地反映结构的破坏模式,本文采用的三维精细化建模方法适用于该类纯拉拔试验。
The numerical simulation was carried out based on tensile test of the embedded components in segment joints of the deep buried storage and drainage shield-driven tunnel in Shanghai in order to study the numerical approach for mechanical analysis of segment joints of the tunnel. Using the concrete damage plasticity model and nonlinear springs, the 3D refined numerical model was established, in which the embedded components with complex geometries and the bond-slip behaviors between the concrete and bars were taken into consideration. Three kinds of embedded component models with different degrees of refinement were established and simply loaded. By comparing the calculation results and considering the spent time and the accuracy of calculation, the simplified form of the embedded components used in the overall model was determined. Nonlinear springs between anchor bars and concrete were set in the model in order to simulate the bond-slip behavior between them. In addition, two contrast models were also established using binding constraint and face-face contact constraint between concrete and anchor bars respectively. The three types of models were loaded in accordance with the test conditions. Comparing the results of the numerical calculation with the test results, it is shown that the "nonlinear spring model", which takes the bond-slip behavior into consideration, is more consistent with the test results than the "face to face contact model" and "binding model". And the model also reflects the failure mode very well. It indicates that the three dimensional refined modeling method used in this paper is applicable for similar tensile tests.
The numerical simulation was carried out based on tensile test of the embedded components in segment joints of the deep buried storage and drainage shield-driven tunnel in Shanghai in order to study the numerical approach for mechanical analysis of segment joints of the tunnel. Using the concrete damage plasticity model and nonlinear springs, the 3D refined numerical model was established, in which the embedded components with complex geometries and the bond-slip behaviors between the concrete and bars were taken into consideration. Three kinds of embedded component models with different degrees of refinement were established and simply loaded. By comparing the calculation results and considering the spent time and the accuracy of calculation, the simplified form of the embedded components used in the overall model was determined. Nonlinear springs between anchor bars and concrete were set in the model in order to simulate the bond-slip behavior between them. In addition, two contrast models were also established using binding constraint and face-face contact constraint between concrete and anchor bars respectively. The three types of models were loaded in accordance with the test conditions. Comparing the results of the numerical calculation with the test results, it is shown that the "nonlinear spring model", which takes the bond-slip behavior into consideration, is more consistent with the test results than the "face to face contact model" and "binding model". And the model also reflects the failure mode very well. It indicates that the three dimensional refined modeling method used in this paper is applicable for similar tensile tests.
引文
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[9]隋涛.大直径深层调蓄排水盾构隧道的受力特性分析[J].特种结构,2016,(1):32-38.SUI Tao.Force Analysis of Deep Buried Storage and Drainage Sield Tunnel with Large Diameter[J].Special Structures,2016,(1):32-38.
[10]陆新征,叶列平,缪志伟.建筑抗震弹塑性分析(第二版)[M].北京:中国建筑工业出版社,2009.LU Xinzheng,YE Lieping,MIAO Zhiwei.Aseismic Elastoplastic Analysis of Buildings(Second Edition)[M].Beijing:China Architecture&Building Press,2009.
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[12]王扬禅.球墨铸铁QT600在不同应力状态下断裂的试验与数值研究[D].南宁:广西大学,2017.WANG Yangchan.Experimental and Numerical Study on the Fracture of Nodular Graphite Cast Iron QT600 under Different Stress States[D].Nanning:Guangxi University,2017.
[13]NILSON A H.Internal Measurement of Bond Slip[J].Am.Concrete Inst.Journal&Proceedings,1972,69(7):439-441.
[14]MIRZA S M,HOUDE J.Study of Bond Stress-Slip Relationships in Reinforced Concrete[J].Journal of the American Concrete Institute,1979,76(1):19-46.
[15]腾智明,张合贵.钢筋混凝土梁中劈裂粘结破坏及钢筋延伸长度的试验研究[J].土木工程学报,1989,(2):33-43.TENG Zhiming,ZHANG Hegui.Experimental Study on Splitting Bond Failure and Development Length of Reinforcing Bars in Reinforced Concrete Beams[J].China Civil Engineering Journal,1989,(2):33-43.
[16]狄生林.钢筋混凝土梁的非线性有限元分析[J].东南大学学报(自然科学版),1984,14(2):87-96.DI Shenglin.Nonlinear Finite Element Analysis of Reinforced Concrete Beams[J].Journal of Southeast University(Natural Science),1984,14(2):87-96.
[2]兰学平,鲁亮,刘利惠.超大隧道衬砌管片接头力学性能试验研究[J].结构工程师,2009,25(5):114-118.LAN Xueping,LU Liang,LIU Lihui.Experimental Study on Mechanical Properties for Segment Joints of Super Tunnel Lining[J].Structural Engineers,2009,25(5):114-118.
[3]闫治国,彭益成,丁文其,等.青草沙水源地原水工程输水隧道单层衬砌管片接头荷载试验研究[J].岩土工程学报,2011,33(9):1385-1390.YAN Zhiguo,PENG Yicheng,DING Wenqi,et al.Load Tests on Segment Joints of Single Lining Structure of Shield Tunnel in Qingcaosha Water Conveyance Project[J].Chinese Journal of Geotechnical Engineering,2011,33(9):1385-1390.
[4]蒋首超,刘仁勇,柳献,等.矩形盾构管片接头抗剪试验研究[J].建筑施工,2015,(1):114-117.JIANG Shouchao,LIU Renyong,LIU Xian,et al.Share Test Study on Rectangular Shield Tunnel Segment Joint[J].Building Construction,2015,(1):114-117.
[5]朱建文,孟晗,闫治国,等.高承载力盾构管片接头预埋件抗拉性能试验[J].中国公路学报,2017,30(8):149-155.ZHU Jianwen,MENG Han,YAN Zhiguo,et al.Test of Tensile Performance for Embedded Part with High Bearing Capability of Segment Joints in Shield Tunnel[J].China Journal of Highway and Transport,2017,30(8):149-155.
[6]廖少明,闫治国,宋博,等.钢纤维管片接头局部应力的数值模拟试验[J].岩土工程学报,2006,28(5):653-659.LIAO Shaoming,YAN Zhiguo,SONG Bo,et al.Numerical Modeling Tests on Local Stress of SFRC Tunnel Segment Joints[J].Chinese Journal of Geotechnical Engineering,2006,28(5):653-659.
[7]陈俊生,莫海鸿.盾构隧道管片接头抗弯刚度的三维数值计算[J].铁道学报,2009,31(4):87-91.CHEN Junsheng,MO Haihong.Three-dimensional FEM Analysis on Flexural Rigidity of Segment Joints in Shield Tunnel[J].Journal of the China Railway Society,2009,31(4):87-91.
[8]张建刚,何川.复杂接缝面管片接头的力学性能数值分析[J].地下空间与工程学报,2013,9(6):1350-1354.ZHANG Jiangang,HE Chuan.Numerical Analysis of Mechanical Property of Shield Tunnel Segmental Joint with Complex Interface[J].Chinese Journal of Underground Space and Engineering,2013,9(6):1350-1354.
[9]隋涛.大直径深层调蓄排水盾构隧道的受力特性分析[J].特种结构,2016,(1):32-38.SUI Tao.Force Analysis of Deep Buried Storage and Drainage Sield Tunnel with Large Diameter[J].Special Structures,2016,(1):32-38.
[10]陆新征,叶列平,缪志伟.建筑抗震弹塑性分析(第二版)[M].北京:中国建筑工业出版社,2009.LU Xinzheng,YE Lieping,MIAO Zhiwei.Aseismic Elastoplastic Analysis of Buildings(Second Edition)[M].Beijing:China Architecture&Building Press,2009.
[11]BIRTEL V,MARK P.Parameterised Finite Element Modelling of RC Beam Shear Failure[C]//Proceedings of 2006 ABAQUESUser?s Conferece,2006:95-108.
[12]王扬禅.球墨铸铁QT600在不同应力状态下断裂的试验与数值研究[D].南宁:广西大学,2017.WANG Yangchan.Experimental and Numerical Study on the Fracture of Nodular Graphite Cast Iron QT600 under Different Stress States[D].Nanning:Guangxi University,2017.
[13]NILSON A H.Internal Measurement of Bond Slip[J].Am.Concrete Inst.Journal&Proceedings,1972,69(7):439-441.
[14]MIRZA S M,HOUDE J.Study of Bond Stress-Slip Relationships in Reinforced Concrete[J].Journal of the American Concrete Institute,1979,76(1):19-46.
[15]腾智明,张合贵.钢筋混凝土梁中劈裂粘结破坏及钢筋延伸长度的试验研究[J].土木工程学报,1989,(2):33-43.TENG Zhiming,ZHANG Hegui.Experimental Study on Splitting Bond Failure and Development Length of Reinforcing Bars in Reinforced Concrete Beams[J].China Civil Engineering Journal,1989,(2):33-43.
[16]狄生林.钢筋混凝土梁的非线性有限元分析[J].东南大学学报(自然科学版),1984,14(2):87-96.DI Shenglin.Nonlinear Finite Element Analysis of Reinforced Concrete Beams[J].Journal of Southeast University(Natural Science),1984,14(2):87-96.