To facilitate long term infrastructure asset management systems, it is necessary to determine the bearing capacity of pavements. Currently it is common to conduct such measurements in a stationary manner, however the evaluation with stationary loading does not correspond to reality a tendency towards continuous and high speed measurements in recent years can be observed. The computational program SAFEM was developed with the objective of evaluating the dynamic response of asphalt under moving loads and is based on a semi-analytic element method. In this research project SAFEM is compared to commercial finite element software ABAQUS and field measurements to verify the computational accuracy. The computational accuracy of SAFEM was found to be high enough to be viable whilst boasting a computational time far shorter than ABAQUS. Thus, SAFEM appears to be a feasible approach to determine the dynamic response of pavements under dynamic loads and is a useful tool for infrastructure administrations to analyze the pavement bearing capacity.
. [J]. Frontiers of Structural and Civil Engineering, 2018, 12(2): 215-221.
Pengfei LIU, Dawei WANG, Frédéric OTTO, Markus OESER. Application of semi-analytical finite element method to analyze the bearing capacity of asphalt pavements under moving loads. Front. Struct. Civ. Eng., 2018, 12(2): 215-221.
strain along the traffic direction on the bottom of the asphalt base course [μm/m]
81.5
87.0
6.75%
86.3
5.88%
vertical tensile stress on the top of the gravel base layer [MPa]
-0.0556
-0.0316
-43.1%
-0.0283
-49.1%
Tab.2
ABAQUS
SAFEM
elements
160016
2958
nodes
274122
6167
computational time (h)
19.22
0.92
Tab.3
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