Computers and Concrete

  • 제20권3호
  • /
  • Pages.319-327
  • /
  • 2017
  • /
  • 1598-8198(pISSN)
  • /
  • 1598-818X(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Structural analysis of a prestressed segmented girder using contact elements in ANSYS

  • Lazzari, Paula M. (Infrastructure Engineering Graduate Program, Federal University of Santa Catarina) ;
  • Filho, Americo Campos (Civil Engineering Graduate Program, Federal University of Rio Grande do Sul) ;
  • Lazzari, Bruna M. (Civil Engineering Graduate Program, Federal University of Rio Grande do Sul) ;
  • Pacheco, Alexandre R. (Civil Engineering Graduate Program, Federal University of Rio Grande do Sul)
  • 투고 : 2017.03.09
  • 심사 : 2017.05.03
  • 발행 : 2017.09.25
⟨ 이전 논문 다음 논문 ⟩

초록

Studying the structural behavior of prestressed segmented girders is quite important due to the large use this type of solution in viaducts and bridges. Thus, this work presents a nonlinear three-dimensional structural analysis of an externally prestressed segmented concrete girder through the Finite Element Method (FEM), using a customized ANSYS platform, version 14.5. Aiming the minimization of the computational effort by using the lowest number of finite elements, a new viscoelastoplastic material model has been implemented for the structural concrete with the UPF customization tool of ANSYS, adding new subroutines, written in FORTRAN programming language, to the main program. This model takes into consideration the cracking of concrete in its formulation, being based on fib Model Code 2010, which uses Ottosen rupture surface as the rupture criterion. By implementing this new material model, it was possible to use the three-dimensional 20-node quadratic element SOLID186 to model the concrete. Upon validation of the model, an externally prestressed segmented box concrete girder that was originally lab tested by Aparicio et al. (2002) has been computationally simulated. In the discretization of the structure, in addition to element SOLID186 for the concrete, unidimensional element LINK180 has been used to model the prestressing tendons, as well as contact elements CONTA174 and TARGE170 to simulate the dry joints along the segmented girder. Stresses in the concrete and in the prestressing tendons are assessed, as well as joint openings and load versus deflection diagrams. A comparison between numerical and experimental data is also presented, showing a good agreement.

키워드

참고문헌

  1. Amiri, G.G., Jahromi, A.J. and Mohebi, B. (2012), "Determination of plastic hinge properties for static nonlinear analysis of FRPstrengthened circular columns in bridges", Comput. Concrete, 10(5), 435-455. https://doi.org/10.12989/cac.2012.10.5.435
  2. Anil, O. and Uyaroglu, B. (2013), "Nonlinear finite element analysis of loading transferred from column to socket base", Comput. Concrete, 11(5), 475-492. https://doi.org/10.12989/cac.2013.11.5.475
  3. Aparicio, C.A., Gonzalo, R. and Casas, R.J. (2002), "Testing of externally prestressed concrete beams", Eng. Struct., 24(4-8), 73-84. https://doi.org/10.1016/S0141-0296(01)00062-1
  4. Bulut, N., Anil, O . and Belgin, C.M. (2011), "Nonlinear finite element analysis of RC beams strengthened with CFRP strip against shear", Comput. Concrete, 8(6), 717-733. https://doi.org/10.12989/cac.2011.8.6.717
  5. Chen, W.F. and Han, D.J. (1988), Plasticity for Structural Engineers, Springer-Verlag, New York, U.S.A.
  6. Comite Euro-International du Beton (2012), CEB-FIP Model Code 2010, Bulletin N. 65.
  7. Demir, S. and Husem, M. (2015), "Investigation of bond-slip modeling methods used in FE analyis of RC members", Struct. Eng. Mech., 56(2), 275-291. https://doi.org/10.12989/sem.2015.56.2.275
  8. Ergun, M. and Ates, S. (2015), "The stress analysis of a shear wall with matrix displacement method", Struct. Eng. Mech., 53(2), 205-226. https://doi.org/10.12989/sem.2015.53.2.205
  9. Hinton, E. (1988), Numerical Methods and Software for Dynamic Analysis of Plates and Shells, Pineridge Press Limited, Swansea, Wales, U.K.
  10. Kazaz, I. (2011), "Finite element analysis of shear-critical reinforced concrete walls", Comput. Concrete, 8(3), 143-162. https://doi.org/10.12989/cac.2011.8.2.143
  11. Lazzari, B.M., Campos Filho, A., Lazzari, P.M. and Pacheco, A. R. (2017), "Using element-embedded rebar model in ANSYS for the study of reinforced and prestressed concrete structures", Comput. Concrete, 19(4), 347-356. https://doi.org/10.12989/cac.2017.19.4.347
  12. Lazzari, B.M. (2015) "Finite element analysis of reinforced and prestressed concrete elements under plane stress states", M.S. Dissertation, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil.
  13. Lazzari, P.M. (2016) "Numerical simulation of construction stages of cable-stayed bridges through the finite element method", Ph.D. Dissertation, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil.
  14. Oner, E., Yaylaci, M. and Birinci, A. (2015), "Analytical solution of a contact problem and comparison with the results from FEM", Struct. Eng. Mech., 54(4).
  15. Ottosen, N.S. (1977), "A failure criterion for concrete", J. Eng. Mech. Div., 103(4), 527-535.
  16. Shaheen, Y.B.I., Mahmoud, A.M. and Refat, H. (2016), "Structural performance of ribbed ferrocement plates reinforced with composite materials", Struct. Eng. Mech., 60(4), 567-594. https://doi.org/10.12989/sem.2016.60.4.567
  17. Vasudevan, G. and Kothandaraman, S. (2015), "RC beams retrofitted using external bars with additional anchorages-a finite element study", Comput. Concrete, 16(3), 415-428. https://doi.org/10.12989/cac.2015.16.3.415
  18. Wahab, M.A. (2014), The Mechanics of Adhesives in Composite and Metal Joints: Finite Element Analysis with ANSYS, DEStech Publications, Inc., Pennsylvania, U.S.A.