Techno Press
You logged in as Techno Press

Structural Engineering and Mechanics
  Volume 85, Number 2, January25 2023 , pages 163-177

Numerical simulation by the finite element method of the constructive steps of a precast prestressed segmental bridge
Gabriela G. Machado, Américo Campos Filho, Paula M. Lazzari, Bruna M. Lazzari and Alexandre R. Pacheco

    The design of segmental bridges, a structure that typically employs precast prestressed concrete elements and the balanced cantilever construction method for the deck, may demand a highly complex structural analysis for increased precision of the results. This work presents a comprehensive numerical analysis of a 3D finite element model using the software ANSYS, version 21.2, to simulate the constructive deck stages of the New Guaiba Bridge, a structure located in Porto Alegre city, southern Brazil. The materials concrete and steel were considered viscoelastic. The concrete used a Generalized Kelvin model, with subroutines written in FORTRAN and added to the main model through the customization tool UPF (User Programmable Features). The steel prestressing tendons used a Generalized Maxwell model available in ANSYS. The balanced cantilever constructive steps of a span of the New Guaiba Bridge were then numerically simulated to follow the actual constructive sequence of the bridge. A comparison between the results obtained with the numerical model and the actual vertical displacement data monitored during the bridge's construction was carried out, showing a good correlation.
Key Words
    ANSYS; balanced cantilever method; construction stages; finite element method; precast concrete; prestressed concrete; segmental bridges; UPF-User Programmable Features
Gabriela G. Machado, Américo Campos Filho, Paula M. Lazzari, Bruna M. Lazzari and Alexandre R. Pacheco: Civil Engineering Graduate Program, Federal University of Rio Grande do Sul, 99 Osvaldo Aranha Ave., 90035-190, Porto Alegre, RS, Brazil

Techno-Press: Publishers of international journals and conference proceedings.       Copyright © 2023 Techno Press
P.O. Box 33, Yuseong, Daejeon 305-600 Korea, Tel: +82-42-828-7996, Fax : +82-42-828-7997, Email: