TY  - JOUR
T1  - Effect of Load Frequency on the Track Rail and Subgrade Layer Settlement
AU - Majeed, Qutaiba G. AU - Fattah, Mohammed Y. AU - H. Joni, Hassan 
JO  - Journal of Engineering and Applied Sciences
VL  - 14
IS  - 18
SP  - 6723
EP  - 6730
PY  - 2019
DA  - 2001/08/19
SN  - 1816-949x
DO  - jeasci.2019.6723.6730
UR  - https://makhillpublications.co/view-article.php?doi=jeasci.2019.6723.6730
KW  - Railway track
KW  -finite elements
KW  -cyclic loading
KW  -unsaturated soil
KW  -saturation
KW  -predefined
AB  - In this study, a full scale railway track model is d by Abaqus V6.14 program in order to implement a
parametric study. Numerical simulation with 3D model adopted to simulate analysis to get the results. Thirty
six cases models are investigated and simulated with include subgrade layer of 100, 70 and 60% degree of
saturation at load frequency 1, 2, 4, 6, 8 and 10 Hz under two loaded amplitude 200 and 250 kN. The effect of
degree saturation had established by entering the value of matric suction in the geostatic step followed by
static step of soil procedure and then propagating its effect on the soil as stiffness to the next steps. The matric
suction value, according to that will not be changed through the dynamic step and will be the same one that
was entered as a predefined value at the initial stage. The values of strains are calculated reflecting the effect
of matric suction on the stiffness of the soil without regarding to the matric suction change effect. It had been
concluded that the increase of load frequency lead to increase in rate of track and this rate of increases are
almost same for all degrees of saturation. While the increase of load frequency lead to increase in rate of
subgrade settlement and this rate of increases was higher at the higher load amplitude and the lower degree of
saturation.
ER  -