Double-Beam Model to Analyze the Performance of a Pavement Structure on Geocell-Reinforced Embankment

Zhang, Ling; Ou, Qiang; Zhao, Minghua

doi:10.1061/(asce)em.1943-7889.0001453

Cited by 22 publications

(3 citation statements)

References 24 publications

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“…Adopting the similar concept of beam-spring model Wu et al 27 and Chaudhuri and Choudhury 28 examined the dynamic behaviour of buried pipe subjected to surface and subsurface blast loads respectively. Further, Zhang et al 29 , 30 investigated the response of pavement structure on geocell reinforced embankment under vehicle loads (concentrated loads and moving load respectively) using double beam model. As per the author’s knowledge closed-form analytical study on pipe below road pavement with and without intermediate safeguard is not available in the literature.…”

Section: Introductionmentioning

confidence: 99%

Protection of pipeline below pavement subjected to traffic induced dynamic response

Chaudhuri

Choudhury

2023

Sci Rep

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Failure of pipelines below road pavement results to the disruption of both the traffic movement and the consumers of the pipelines. Intermediate safeguard layer can be used to protect the pipeline from heavy traffic loads. The present study proposed analytical solutions to obtain the dynamic response of buried pipe below road pavement with and without considering safeguard based on the concept of triple and double beam system respectively. Pavement layer, safeguard and the pipeline are considered as Euler Bernoulli’s beam. Advanced soil model is used (viscoelastic foundation with shear interaction between springs) to model the surrounding soil. Self-weight of soil is also considered in the present study. The obtained governing coupled differential equations are solved adopting finite sine Fourier transform, Laplace transform and their inverse transformation. The proposed formulation is initially verified with the past numerical and analytical studies and then validated with the three-dimensional finite element based numerical analysis. From parametric study it is perceived that the stability of the pipe can be significantly increased by providing intermediate barrier. Further, pipe deformation is increases with increasing traffic loads. At very high-speed range (> 60 m s−1), pipe deformation is significantly rises with increasing traffic speed. The present study can be useful in preliminary design stage before performing rigorous and expensive numerical or experimental study.

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Section: Introductionmentioning

confidence: 99%

Protection of pipeline below pavement subjected to traffic induced dynamic response

Chaudhuri

Choudhury

2023

Sci Rep

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“…Taking the railway slab track as an example, the rail can be regarded as the upper beam and the slab as the lower beam [3,4]. For the embankment structures, the pavement structure can be treated as an upper beam, and the geo-cell reinforced layer idealized as the lower beam [5]. Therefore, the dynamic behaviors of these infrastructures travelled by moving vehicles is the concern of most researchers.…”

Section: Introductionmentioning

confidence: 99%

Connection Damage Detection of Double Beam System under Moving Load with Genetic Algorithm

Zhang

Song

Yang

et al. 2021

mech

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In this paper, a novel damage detection approach for the spring connection of the double beam system using the dynamic response of the beam and genetic algorithm is presented. The double beam system is regarded as both Bernoulli-Euler beams with simply supported ends, the upper and lower beams are connected by a series of linear springs with certain intervals. With the genetic algorithm, the dynamic acceleration response of double beam system under moving load, which can be solved by the Newmark-β integration procedure, is used as the input data to detect the connection damage. Thus the dynamic response of the double beam system with a certain damage pattern can be calculated employing the moving load model. If the calculated result is quite close to the recorded response of the damaged bridge, this damage pattern will be the solution. The connection damage detection process of the proposed approach is presented herein, and its feasibility is studied from the numerical investigation with simple and multiple damages detection. It is concluded that the sophisticated damage conditions need much longer time to detect successfully.

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“…The experimental study conducted by Raymond (2002) and Indraratna et al (2015) indicated the importance of bending stiffness of the reinforcement layer which can be incorporated in analytical models by idealizing it as a beam. This consideration results in a double beam model which were used to simulate pavement or foundation beam lying over geocell improved earth bed subjected to static load (Maheshwari and Viladkar, 2009;Zhao et al, 2016;Zhang et al, 2018). Other engineering systems were also studied by utilizing such models to understand the behavior of response under moving load considering perfect contact between the top beam and neighboring material (Hussein and Hunt, 2006;Yuan et al, 2009;Auersch, 2012;Mohammadzadeh et al, 2014;Deng et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Modeling of Rail Tracks on Stone Column Reinforced Tensionless Foundations

Bhatra

Maheshwari

2019

Front. Built Environ.

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This research investigates the response of rails on geocell-stone column composite reinforced foundation beds under a moving load. Improved earth bed has been considered to respond only to compressive forces. The granular mat below the rail has been idealized as a Pasternak shear layer and geocell reinforcement as an infinite beam with finite bending stiffness. Soft soil and stone columns have been symbolized by Winkler springs of different stiffnesses. Analysis has been carried out with due consideration to viscous damping in the system. The governing differential equations have been established and simplified for general use with the help of dimensionless parameters. These equations have been solved in presence of appropriate boundary conditions by utilizing Finite difference method in combination with iterative Gauss-Seidel procedure. Inclusion of stone columns has been observed to significantly affect the onset of separation between rail and the soil layer underneath. Various parameters namely, applied load and its velocity, stiffnesses of top, bottom soil layers and stone columns, damping ratio, relative flexural rigidity, depth of placement of geocell, configuration of stone columns have been found to affect the response of soil-foundation system significantly. Improvement in the properties of soil by means of higher value of relative compressibility resulted in typical reduction of 50% in maximum deflection. It has been observed that the region of detachment reduces on increasing the depth of placement of the bottom beam. Sensitivity analysis highlighted the greater sensitivity of upward deflection as compared to the downward deflection of rail with respect to all the parameters except for relative compressibility of the soil and relative stiffness of the stone columns.

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Double-Beam Model to Analyze the Performance of a Pavement Structure on Geocell-Reinforced Embankment

Cited by 22 publications

References 24 publications

Protection of pipeline below pavement subjected to traffic induced dynamic response

Protection of pipeline below pavement subjected to traffic induced dynamic response

Connection Damage Detection of Double Beam System under Moving Load with Genetic Algorithm

Modeling of Rail Tracks on Stone Column Reinforced Tensionless Foundations

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