Evaluation of geogrid reinforcement of flexible pavement performance: A review of large-scale laboratory studies

Alimohammadi, Hossein; Zheng, Junxing; Schaefer, Vernon R.; Siekmeier, John; Velasquez, Raul

doi:10.1016/j.trgeo.2020.100471

Cited by 49 publications

(22 citation statements)

References 15 publications

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“…3 School of Mechanical Engineering, University of Tehran, Tehran, Iran. 4 The Department of Civil and Environmental Engineering and Construction, University of Nevada, Las Vegas, USA.…”

Section: Discussionmentioning

confidence: 99%

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Physical modeling of the long-term behavior of integral abutment bridge backfill reinforced with tire-rubber

et al. 2021

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The primary objective of this study is to investigate the benefits of adding tire rubber as an inclusion to backfill behind integral bridge abutments. In this respect, four physical model tests that enable cyclic loading of the backfill-abutment are conducted and evaluated. Each test consisted of 120 load cycles, and both the horizontal force applied to the top of the abutment wall and the pressures along the wall-backfill interface is measured. The primary variable in this study is the tire rubber content in the backfill soil behind the abutment. Results show adding tire rubber to the backfill would be beneficial for both pressure and settlement behind the abutment. According to results, adding tire rubber to soil decreases the equivalent peak lateral soil coefficient (Keq-peak) up to 55% and earth pressure coefficient ($${K}^{*}$$ K ∗ ) at upper parts of the abutment up to 59%. Moreover, the settlements of the soil behind the wall are decreased up to 60%.

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“…3 School of Mechanical Engineering, University of Tehran, Tehran, Iran. 4 The Department of Civil and Environmental Engineering and Construction, University of Nevada, Las Vegas, USA.…”

Section: Discussionmentioning

confidence: 99%

“…One of the most effective ways to decrease geotechnical problems is using reinforcement in soils [4,23,34,45,52,65]. The use of reinforced soil is an effective way to reduce the horizontal pressure on the abutment and the backfill's subsequent settlement [39,47].…”

Section: Introductionmentioning

confidence: 99%

Physical modeling of the long-term behavior of integral abutment bridge backfill reinforced with tire-rubber

et al. 2021

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“…), traffic, temperature, properties of the materials in place, properties of the rehabilitation materials, properties of the geogrid layer and, finally, the geogrid-asphalt interaction. The choice of the type and location of the geogrid is therefore mainly based on experience [14].…”

Section: Figure 1 Rise and Propagation Of Cracks On The Road Pavementmentioning

confidence: 99%

Tests on the Influence of Cyclic Loading and Temperature on the Behaviour of Flexible Pavement Reinforced by Geogrids with Numerical Simulation

2023

Teh. vjesn.

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Crack growth is one of the most common failure modes in flexible linear infrastructure as a result of the effect of cyclic traffic loads and the climate influence. The results of an experimental study performed by applying different types of geogrids on asphalt concrete (AC) samples are presented in this paper. Static then cyclic loading are applied to these specimens reinforced before loading and the rest pre-cracked and loaded. Also, the influence of the type of geogrid, the type of loading, the frequency of cyclic loading and the variation of the ambient temperature were examined, by simulating the performance of real pavements in the great Algerian south, where the thermal gradient may reach the value of 30 °C. A total of 20 specimens were tested to evaluate the tensile strength, stresses and strains. A numerical analysis based on the finite element method, using an adapted software, was performed to match the experimental results found. The results (experimental and numerical) indicate that the optimal type and location of the geogrid, by static or cyclic loading, is critical to achieve stress and strain gains of up to 26% and thus can result in an aging delay of approximately five years compared to the application of traditional methods.

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“…Therefore, the consideration of the interaction between superstructure, foundation, abutments and backfill soil in bridge design is important [ 30 , 31 ]. Abutment–backfill soil interaction problems can be avoided by means of a soil reinforcement approach [ 32 , 33 ] or by adding tire rubber to the backfill of bridge abutments [ 34 ]. On the other hand, [ 35 ] both calculate the fragility curves of corroded concrete bridges and propose seismic loads for the structural reliability assessment due to the effect of corrosion.…”

Section: Introductionmentioning

confidence: 99%

Fragility Assessment of RC Bridges Exposed to Seismic Loads and Corrosion over Time

Herrera

Tolentino

2023

Materials

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A methodology to estimate the structural fragility of RC bridges, considering the effects of seismic loadings and corrosion over time, is presented. Two scenarios are considered: (a) The structure is exposed only to seismic loads, (b) Both the effect of corrosion and seismic loads are present in the system. The uncertainties related to material properties, structural geometry, seismic occurrences, corrosion initiation time, cracking and corrosion evolution are considered. Different time stages, such as 0, 50, 75, 100, and 125 years are selected to evaluate the effect of both seismic loads and seismic loads plus corrosion. The calculation of fragility curves implies a structural design, nonlinear modeling of structures with simulated properties, estimation of both corrosion times and seismic occurrences, and evaluation of structural demand over time considering the effect of seismic loads and corrosion. An illustrative example is provided on an RC continuous bridge with AASHTO beams, cap beams and circular columns located in Acapulco, Guerrero, Mexico. A performance level equal to 0.002 is chosen for the design of the structure. Results show that the probability of exceeding the design performance levels for both cases (seismic and seismic plus corrosion) are similar at the stage of time equal to zero (a newly built bridge). However, such probabilities, after 150 years, are equal to 0.61 and 0.85 due to the cumulative damage caused by seismic and seismic plus corrosion, respectively. The estimation of the probability of exceeding a certain performance level, considering the effect of corrosion together with seismic loads, highlights the importance of considering more than one type of solicitation for these kinds of structural systems. Lastly, recommendations about design are given.

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Evaluation of geogrid reinforcement of flexible pavement performance: A review of large-scale laboratory studies

Cited by 49 publications

References 15 publications

Physical modeling of the long-term behavior of integral abutment bridge backfill reinforced with tire-rubber

Physical modeling of the long-term behavior of integral abutment bridge backfill reinforced with tire-rubber

Tests on the Influence of Cyclic Loading and Temperature on the Behaviour of Flexible Pavement Reinforced by Geogrids with Numerical Simulation

Fragility Assessment of RC Bridges Exposed to Seismic Loads and Corrosion over Time

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