装配式钢筋混凝土管型通道数值模拟与现场试验
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摘要
建立了钢筋混凝土管型通道的力学模型,通过面-面接触单元模拟回填土与管型通道及管型通道与管片接缝处的相互作用,有效地分析了管型通道的变形及管片的应力分布状况;运用单元的"生"、"死"功能模拟装配式管型通道的吊装及土体回填的施工全过程,同时利用该模型分析了六安—武汉高速公路装配式管型通道施工过程的变形及应力分布情况,并与现场试验实测值进行了对比分析。结果表明:该模型能较真实地模拟施工过程中管型通道的变形和受力,且能有效地分析装配式管型通道及盾构隧道衬砌管片的力学特性。
Based on FEM,a three-dimensional contact model for mechanical analysis of prefabricated reinforced concrete tubular channel was presented. Using the surface-surface contact elements,the interactions between backfill soil and tubular channel,tubular segment joint were simulated. Deformation of tubular channel and stress distribution state of tubular segment were effectively analyzed. Using life-death element technique,whole construction process for installation and backfill of prefabricated reinforced concrete tubular channel was simulated. Using the presented model,the deformation and stress distributions of prefabricated reinforced concrete tubular channel on Lu'an-Wuhan Expressway were analyzed during construction process. The numerical results were compared with the results of in-situ test. The results show that the model can simulate deformation and stress of the whole construction process. Numerical results are agreement with the results of in-situ test and can be used to analyze mechanical property of prefabricated reinforced concrete tubular channel and lining segment of shield tunnel.
Based on FEM,a three-dimensional contact model for mechanical analysis of prefabricated reinforced concrete tubular channel was presented. Using the surface-surface contact elements,the interactions between backfill soil and tubular channel,tubular segment joint were simulated. Deformation of tubular channel and stress distribution state of tubular segment were effectively analyzed. Using life-death element technique,whole construction process for installation and backfill of prefabricated reinforced concrete tubular channel was simulated. Using the presented model,the deformation and stress distributions of prefabricated reinforced concrete tubular channel on Lu'an-Wuhan Expressway were analyzed during construction process. The numerical results were compared with the results of in-situ test. The results show that the model can simulate deformation and stress of the whole construction process. Numerical results are agreement with the results of in-situ test and can be used to analyze mechanical property of prefabricated reinforced concrete tubular channel and lining segment of shield tunnel.
引文
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[2]胡如军.盾构隧道衬砌管片设计理论研究[D].南京:河海大学,2002.HU Ru-jun.Research of Design Theory of Lining Segment for Shield Tunnel[D].Nanjing:Hohai Uni-versity,2002.
[3]朱伟,黄正荣,梁精华.盾构衬砌管片的壳-弹簧设计模型研究[J].岩土工程学报,2006,28(8):940-947.ZHU Wei,HUANG Zheng-rong,LIANG Jing-hua.Studies on Shell-spring Design Model for Segment of Shield Tunnels[J].Chinese Journal of Geotechnical Engineering,2006,28(8):940-947.
[4]苏宗贤,何川.盾构隧道管片衬砌内力分析的壳-弹簧-接触模型及其应用[J].工程力学,2007,24(10):131-136.SU Zong-xian,HE Chuan.Shell-spring-contact Modelfor Shield Tunnel Segmental Lining Analysis and Its Application[J].Engineering Mechanics,2007,24(10):131-136.
[5]张厚美,过迟,付德明.圆形隧道装配式衬砌接头刚度模型研究[J].岩土工程学报,2000,22(3):309-313.ZHANG Hou-mei,GUO Chi,FU De-ming.A Study on the Stiffness Model of Circular Tunnel Prefabri-cated Lining[J].Chinese Journal of Geotechnical En-gineering,2000,22(3):309-313.
[6]丁峻宏,金先龙,郭毅之,等.沉管隧道地震响应的三维非线性数值模拟方法及应用[J].振动与冲击,2005,24(5):18-22.DINGJun-hong,JIN Xian-long,GUO Yi-zhi,et al.3D Numerical Si mulation Method and Its Application in Calculation of Seismic Response of I mmersed Tunnel[J].Journal of Vibration and Shock,2005,24(5):18-22.
[7]李俊伟,李永刚,黄宏伟,等.涵洞施工全过程弹塑性有限元模拟分析[J].岩石力学与工程学报,2005,24(增2):5634-5640.LI Jun-wei,LI Yong-gang,HUANG Hong-wei,et al.Elastoplastic Finite Element Si mulation Analysis of the Whole Processes During Culvert Construction[J].Chinese Journal of Rock Mechanics and Engineering,2005,24(S2):5634-5640.
[8]陈万吉,胡志强.三维摩擦接触问题算法精度和收敛性研究[J].大连理工大学学报,2003,43(5):541-547.CHEN Wan-ji,HU Zhi-qiang.Study of Convergence of Exact Algorithm to Solve the Three-di mensional Frictional Contact Problems[J].Journal of Dalian University of Technology,2003,43(5):541-547.
[9]汤文锋,王毅红,史耀华.新型钢管混凝土节点的非线性有限元分析[J].长安大学学报:自然科学版,2004,24(5):60-63.TANG Wen-feng,WANG Yi-hong,SHI Yao-hua.Nonlinear Finite Element Analysis of New Type Joint in CFST(Concrete Filled Steel Tubular)[J].Journal of Chang an University:Natural Science Edition,2004,24(5):60-63.
[10]丁发兴,余志武,欧进萍.混凝土单轴受力损伤本构模型[J].长安大学学报:自然科学版,2008,28(4):70-73.DING Fa-xing,YU Zhi-wu,OU Jin-ping.Damage Constitutive Model for Concrete Under Uniaxial Stress Conditions[J].Journal of Chang an University:Natural Science Edition,2008,28(4):70-73.
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