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A time domain boundary element method for modeling the quasi-static viscoelastic behavior of asphalt pavements
2007 (English)In: Engineering analysis with boundary elements, ISSN 0955-7997, Vol. 31, no 3, 226-240 p.Article in journal (Refereed) Published
Abstract [en]

A time domain boundary element method (BEM) is presented to model the quasi-static linear viscoelastic behavior of asphalt pavements. In the viscoelastic analysis, the fundamental solution is derived in terms of elemental displacement discontinuities (DDs) and a boundary integral equation is formulated in the time domain. The unknown DDs are assumed to vary quadratically in the spatial domain and to vary linearly in the time domain. The equation is then solved incrementally through the whole time history using an explicit time-marching approach. All the spatial and temporal integrations can be performed analytically, which guarantees the accuracy of the method and the stability of the numerical procedure. Several viscoelastic models such as Boltzmann, Burgers, and power-law models are considered to characterize the time-dependent behavior of linear viscoelastic materials. The numerical method is applied to study the load-induced stress redistribution and its effects on the cracking performance of asphalt pavements. Some benchmark problems are solved to verify the accuracy and efficiency of the approach. Numerical experiments are also carried out to demonstrate application of the method in pavement engineering.

Place, publisher, year, edition, pages
2007. Vol. 31, no 3, 226-240 p.
Keyword [en]
time domain BEM, viscoelasticity, displacement discontinuities, time marching, viscoelastic models, asphalt pavements, stress redistribution, displacement discontinuity method, fracture
URN: urn:nbn:se:kth:diva-16443DOI: 10.1016/j.enganabound.2006.09.007ISI: 000244802200005OAI: diva2:334485
QC 20100525Available from: 2010-08-05 Created: 2010-08-05Bibliographically approved

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Birgisson, Björn
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