Analytical study of the dynamic response of a double-beam model for a geosynthetic-reinforced embankment under traffic loads

被引:40
作者
Zhang, Ling [1 ]
Ou, Qiang [1 ]
Zhou, Shuai [1 ]
机构
[1] Hunan Univ, Coll Civil Engn, Changsha 410082, Peoples R China
基金
中国国家自然科学基金;
关键词
Geosynthetic-reinforced layer; Double-beam model; Traffic load; Deformation; CLOSED-FORM SOLUTION; VISCOELASTIC FOUNDATION; ELASTIC-FOUNDATION; TIMOSHENKO BEAM; BEHAVIOR; VIBRATION; DEFORMATION; PERFORMANCE;
D O I
10.1016/j.compgeo.2019.103330
中图分类号
TP39 [计算机的应用];
学科分类号
081203 ; 0835 ;
摘要
In this paper, a double-beam model of a composite working system including an upper pavement structure under traffic loads, an embankment fill layer, a geosynthetic-reinforced mattress, and the lower soft soil over the roadbed is developed. In the model, the reinforced mattress layer surrounded by viscoelastic materials has been assumed to have finite bending stiffness and carry the self-weight of embankment fill and the transferred traffic load. Furthermore, the pavement structure and the geosynthetic-reinforced layer have been respectively idealized as the upper typical Euler-Bernoulli beam and the lower modified Euler-Bernoulli beam supported by a series of discretely distributed spring-dashpot systems with different stiffnesses and damping coefficients. Based on these assumptions, governing differential equations for the response of the double-beam system are derived by the perturbation theory. Finally, a parametric study has been undertaken to inquire the influence of the flexural rigidities ratio of two beams, the stiffness ratio of upper and lower soil layers, the height of the upper soil layer, velocity of the traffic load, and the damping ratio.
引用
收藏
页数:13
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