Explicit finite element modelling of bridge girder bearing pedestals

Yahya, Norrul Azmi & Dhanasekar, Manicka (2014) Explicit finite element modelling of bridge girder bearing pedestals. In Smith, Scott T. (Ed.) 23rd Australasian Conference on the Mechanics of Structures and Materials (ACMSM23), Southern Cross University, Byron Bay, Australia, p. 849.

Abstract

Bridge girder bearings rest on pedestals to transfer the loading safely to the pier headstock. In spite of the existence of industry guidelines, due to construction complexities, such guidelines are often overlooked. Further, there is paucity of research on the performance of pedestals, although their failure could cause exorbitant maintenance costs. Although reinforced concrete pedestals are recommended in the industry design guidelines, unreinforced concrete and/ or epoxy glue pedestals are provided due to construction issues; such pedestals fail within a very short period of service. With a view to understanding the response of pedestals subject to monotonic loading, a three-dimensional nonlinear explicit finite element micro-model of unreinforced and reinforced concrete pedestals has been developed. Contact and material nonlinearity have been accounted for in the model. It is shown that the unreinforced concrete pedestals suffer from localised edge stress singularities, the failure of which was comparable to those in the field. The reinforced concrete pedestals, on the other hand, distribute the loading without edge stress singularity, again conforming to the field experience.

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ID Code: 79849
Item Type: Conference Paper
Refereed: Yes
Additional URLs:
Keywords: Explicit Finite Element Modelling, Concrete Bridge Pedestal, Concrete Damage Plasticity, Localised Damages, Stress Singularities, Surface to Surface Contact
ISBN: 9780994152008
Divisions: Current > Schools > School of Civil Engineering & Built Environment
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Deposited On: 08 Jan 2015 05:27
Last Modified: 13 Jan 2015 01:19

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