• ISSN 0258-2724
  • CN 51-1277/U
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Volume 20 Issue 6
Dec.  2007
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Article Contents
XU Xun, QIANG Shizhong. New Model for Full Process Analysis of Bearing Behavior of Externally Prestressed Concrete Beams[J]. Journal of Southwest Jiaotong University, 2007, 20(6): 732-738.
Citation: XU Xun, QIANG Shizhong. New Model for Full Process Analysis of Bearing Behavior of Externally Prestressed Concrete Beams[J]. Journal of Southwest Jiaotong University, 2007, 20(6): 732-738.

New Model for Full Process Analysis of Bearing Behavior of Externally Prestressed Concrete Beams

  • Received Date: 12 Mar 2007
  • Publish Date: 25 Dec 2007
  • Based on FEM(finite element method),a numerical model for an externally prestressed concrete beam was proposed by considering the material and geometrical nonlinearities of this structure in order to investigate its behavior at the ultimate state of bearing capacity.In this model,a grid-section model is introduced to determine the sectional tangent stiffness of reinforced concrete beam element and analyze its degeneration process,and three-node friction-sliding tendon elements are employed to analyze the friction and sliding of external tendons at deviators or sliding blocks.Furthermore,major factors affecting the structural behavior,altogether with the axial second-order moment and the second-order effect,are taken into account in this model.The capability and efficiency of the proposed model were verified by comparing the numerical and experimental results of the characteristic parameters,the external prestress increment,the friction-sliding effect and the second-order effect of experimental beams.The research results show that the friction and sliding of external tendons at deviators or sliding blocks are important factors affecting the structural behavior.

     

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  • NORDIN H.Strengthening structures with externally pretressed tendons[R].Lulea University of Technology,2005.[2] 周履.无粘结力筋与体外力筋预应力混凝土桥梁的发展历程与现状[J].桥梁建设,1997(3):1-11.ZHOU Lü.A historical review and the state of the art of the application of unbonded and external tendons in prestressed concrete bridges[J].Bridge Construction,1997(3):1-11.[3] 方德平.考虑P-Δ效应的体外预应力梁的M-φ分析法[J].工程力学,2002,19(4):113-117.FANG Deping.Analysis of P-Δ effect of externally pretressed beams by the method of M-φ relationship[J].Engineering Mechanics,2002,19(4):113-117.[4] WU Xiaohan,LU Xilin.Tendon model for nonlinear analysis of externlly pretressed concrete structures[J].Journal of Structural Engineering,ASCE,2003,129(1):96-104.[5] KANG Y J,SCORDELIS A C.Nonlinear analysis of prestressed concrete frames[J].Journal of the Structural Division,ASCE,1980,106(ST2):445-462.[6] 沈殷,李国平,陈艾荣.体外预应力混凝土梁的非线性有限元分析[J].同济大学学报,2003,31(7):803-807.SHEN Yin,LI Guoping,CHEN Airong.Nonlinear models of externally prestressed concrete beams[J].Journal of Tongji University,2003,31(7):803-807.[7] 孙海,黄鼎业,王增春,等.体外预应力简支梁受力性能研究与非线性分析[J].土木工程学报,2000,33(2):25-29.SUN Hai,HUANG Dingye,WANG Zengchun,et al.Mechanical properties and nonlinear analysis of simply-supported concrete beams with post-tensioned external tendons[J].China Civil Engineering Journal,2000,33(2):25-29.[8] DEVALAPURA R K,TADROS M K.Stress-strain modeling of 270 ksi low-relaxation prestressing strands[J].PCI Journal,1992,37(2):512-523.[9] 王勖成.有限单元法[M] ,北京:清华大学出版社,2003:617-624.[10] LOU Tiejiong,XIANG Yiqiang.Finite element modeling of concrete beams prestressed with external tendons[J].Engineering Structures,2006,28(14):1 919-1 926.[11] 魏建东.索结构分析的滑移索单元法[J].工程力学,2004,21(6):172-176.WEI Jiandong.Gliding cable element for the analysis of cable structures[J].Engineering Mechanics,2004,21(6):172.176.[12] TAN K H,NG C K.Effects of deviators and tendon configuration on behavior of externally prestressed beams[J].ACI Structures Journal,1997,94(1):13-22.
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