Dynamic Analysis of Flexible Pavement Under Accelerated Vehicle Loading
Date
2021-09
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Pulchowk Campus
Abstract
A three-dimensional flexible pavement simulated in ANSYS for typical road section in
Nepal. The pavement's adopted finite element model (FE) is validated with the classical
theoretical formulations for half-space pavement. The validated model is further
utilized to understand pavement response with and without considering friction
between the pavement and material nonlinearity. The material properties of pavement
considered in the analysis is taken from typical road section used in Nepal. The
inclusion of friction in FEM pavement represents more to the realistic nature of
pavement with which the computation becomes more demanding due to frictional
nonlinearity. The vertical displacement has increased while the stress and strain have
decreased compared to the bonded model. The nonlinear pavement model produce
response result always higher than the corresponding elastic loading under accelerated
vehicular loading. The vertical displacement at bottom of asphalt is about 19 % and 12
% larger for nonlinear response. A comparison between maximum response during
constant velocity and deaccelerated loading, the maximum stress on pavement under
deaccelerated loading (with 5 m/s2
from 10km/hr to 5 km/hr) is lesser than the constant
velocity loading (5km/hr) while is greater than vehicle loading moving with 10 km/hr.
The result of pavement from ANSYS simulation can be used for designing purpose
basesd on iterative modeling of section for economical and safe design.
Description
A three-dimensional flexible pavement simulated in ANSYS for typical road section in
Nepal. The pavement's adopted finite element model (FE) is validated with the classical
theoretical formulations for half-space pavement.
Keywords
Flexible Pavement, Accelerated effect, Three-Dimensional Elastic Analysis, Dynamic Analysis
Citation
MASTER OF SCIENCE IN STRUCTURAL ENGINEERING