Lattice models of debonding in composite concrete pavements

D. Tompkins, L. Khazanovich, J. E. Bolander

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Recent research in the United States has focused on the design, construction, and performance of composite concrete pavements-that is, two heterogeneous concrete layers placed sequentially using "wet-on-wet" techniques. These techniques introduce some uncertainties over conventional single-layer paving, including the possibility of thermally, hygrally, or mechanically induced fracture and separation at the interface of the concrete layers. In this work, the potential for mixed-mode fracture at the interface is assessed using three-dimensional lattice models. This discrete approach is coupled with a finite element model for plate behavior away from the potential cracking zone. The model, using two damage criteria, was verified and validated against experimental data for failure in notched concrete beams in three-point testing. In addition, simulations were conducted using each criterion for interface failure in a composite concrete pavement. The simulation results suggest that interface fracture is unlikely, even in the presence of extreme thermal gradients over the pavement depth.

Original languageEnglish (US)
Title of host publicationComputational Modelling of Concrete Structures - Proceedings of EURO-C 2014
Pages477-485
Number of pages9
StatePublished - Mar 5 2014
EventEURO-C 2014 Conference - St. Anton am Arlberg, Austria
Duration: Mar 24 2014Mar 27 2014

Publication series

NameComputational Modelling of Concrete Structures - Proceedings of EURO-C 2014
Volume1

Other

OtherEURO-C 2014 Conference
CountryAustria
CitySt. Anton am Arlberg
Period3/24/143/27/14

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