RT info:eu-repo/semantics/conferenceObject
T1 Influence of the backfill parameters in distinct element modeling (DEM) of a backfill masonry arch bridge through the pfc2d software
A1 García Gómez, Felipe
A1 Martínez Martínez, José Antonio
A1 García Castillo, Luis Mª
A1 Aragón Torre, Ángel
K1 Discrete Element Method
K1 Backfill Masonry Bridge
K1 PFC2D
K1 Geomechanical modelling
K1 Soil-structure interaction
K1 Ingeniería civil
K1 Civil engineering
K1 Resistencia de materiales
K1 Strength of materials
K1 Informática
K1 Computer science
AB This paper presents an investigation on how to model a backfill masonry arch bridge using the discrete element method (DEM). The calculations that geotechnical engineers use the most today are elastic calculations, which use an elastic modulus “E”, or plastic analysis that check the equilibrium limit, through a cohesion “c” and a friction angle “”. There is an important problem here in determining these parameters. Soils are not homogeneous materials, but have a great variability. The micromechanics of particles arises here to solve these difficulties  PFC2D software is used for this purpose. A certain backfill masonry arch bridge is modelled, with different types of fill, mortar and voussoir materials. Contact bonds and parallel bonds are installed to create the arch at a first stage, positioning balls by their center and radius. Secondly the fill is introduced in several layers and finally the arch is loaded until its collapse in three different load cases. A biaxial test has been programmed using ‘FISH’ code to obtain the micro-parameters used in the model so that they match the macro-parameters obtained from a real biaxial test. Also, a macro within a spreadsheet has been created to simplify the process of introducing the geometry of the arch.  Further discussion on the influence of the DEM backfill parameters is presented as well as a sensitivity analysis for the arch bridge, specially with backfill parameters and load position. Advantages, disadvantages and limitations of this method of analysis are identified in relation to other frequently used methods.
PB Lombillo Vozmediano, Ignacio
SN 978-84-09-17873-5
SN 2386-8198
YR 2020
FD 2020
LK http://hdl.handle.net/10259/8678
UL http://hdl.handle.net/10259/8678
LA eng
NO Trabajo presentado en: 8th Euro-American Congress on Construction Pathology, Rehabilitation Technology and Heritage Management, REHABEND 2020. Granada, 24-27 de marzo de 2020.
DS Repositorio Institucional de la Universidad de Burgos
RD 14-may-2024