Numerical simulation of orthotropic steel deck bridges with two membrane layers systems
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Abstract: The finite element system CAPA-3D was utilized as the numerical simulation platform, two structural FE models of orthotropic steel bridge decks were set up, the static and dynamic FE simulations under different loading conditions were carried out, the special attention was given to identify the critical wheel load location, and the maximum tensile stress distribution and the variation of strain rate inside membrane layers. Simulation result shows that the FE models are capable of simulating the realistic behavior of orthotropic steel bridge. The distributions of strains and stresses inside the surfacing materials depend highly on wheel load level, wheel load frequency, wheel position, membrane bonding strength as well as the thicknesses and characteristics of surfacing layers.The maximum tensile stress of membrane layers is found around 0.4 MPa, which coincides with the minimum requirement for the adhesive bonding strength of membrane material proposed by the standards NF P98-282and TP-BEL-B.The maximum membrane strain rate is found around 0.1, which is an important information that can be utilized for the characterization of membrane products.
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Table 1. Material elasticity properties
Material Modulus/MPa Poisson ratio Steel 2 100 000 0.20 Guss asphalt 7 000 0.35 Porous asphalt 5 500 0.35 Top membrane 100-300 0.30 Bottom membrane 100-300 0.30 
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[1] LIU X, MEDANI T O, SCARPAS A, et al. Experimental and numerical characterization of a membrane material for orthotropic steel deck bridges: part 2: development and implementation of a nonlinear constitutive model[J]. Finite Elements in Analysis and Design, 2008, 44(9/10): 580-594. [2] MEDANI T O. Design principles of surfacings on orthotropic steel bridge decks[D]. Delft: Delft University of Technology, 2006. [3] MEDANI T O, LIU X, HUURMAN M, et al. Experimental and numerical characterization of a membrane material for orthotropic steel deck bridges: part 1: experimental work and data interpretation[J]. Finite Elements in Analysis and Design, 2008, 44(9/10): 552-563. [4] MEDANI T O, SCARPAS A, KOLSTEIN M H, et al. Design aspects for wearing courses on orthotropic steel bridge decks[C]//International Society for Asphalt Pavements. Ninth Interna-tional Conference on Asphalt Pavement. Copenhagen: Inter-national Society for Asphalt Pavements, 2002: 1-18. [5] HUURMAN M, MEDANI T O, MOLENAAR A, et al. 3D-FEM for estimation of the behaviour of asphalt surfacings on orthotropic steel deck bridges[C]//TRB. 83rd TRB Annual Meeting. Washington DC: TRB, 2004: 1-24. [6] SCARPAS A, LIU X. CAPA-3Dfinite elements system users manual, parts Ⅰ, Ⅱ and Ⅲ[D]. Delft: Delft University of Technology, 2008. [7] LIU X, SCARPAS A, LI J, et al. Application of MAT device to characterize the adhesive bonding strength of membrane in orthotropic steel deck bridges[C]//ISAP. ISAP 2012, International Symposium on Heary Duty Asphalt Pavements and Bridge Deck Pavements. Nanjing: ISAP, 2012: 1-10. -
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