首页|Effect of Testing Mechanisms on the Load-Strain-Time Behavior of Geosynthetic Reinforcements

Effect of Testing Mechanisms on the Load-Strain-Time Behavior of Geosynthetic Reinforcements

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  • NETL
  • NSTL
  • Amer Soc Testing Materials
This study compares how geosynthetics behave under load, under strain, and over time whensubjected to confined tensile tests in soil, employing two commonly used mechanisms inresearch. One test type simulates a reinforced layer, where tensile loads are indirectly appliedto the geosynthetic via stresses transferred from the soil. In contrast, the other test appliestensile loads directly to the geosynthetic material using clamps while under soil confinement.The objective is to elucidate how these testing mechanisms might yield differing in-soil tensilecharacteristics for different geosynthetics. The study involved conducting load-strain-timetests on samples of nonwoven and woven geotextiles, as well as a geogrid, under varyingsustained loads over a 120-h period within a sand clay soil providing soil confinement to geosyntheticsat different surcharge levels. The results suggest that soil confinement plays a significantrole in shaping the load-strain-time behavior of geosynthetics. Furthermore, it wasnoted that the impact of testing mechanisms on this behavior is contingent upon the typeand stiffness of the geosynthetics, as well as their interaction with the confining soil. In general,in-soil tests in which tensile loads are mobilized by geosynthetics and transferred from the soilprovide more confident results for better simulating operation conditions. Tests that directlyapply tensile loads to the geosynthetic while maintaining stationary soil confinement may yieldmisleading results, especially for geosynthetics that have poor interaction with the soil.

creep behaviorgeosyntheticssoil confinementstress relaxation

Rafael Ribeiro Plácido、Fernando Henrique Martins Portelinha、Marcos Massao Futai、Tiago de Jesus Souza

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Department of Civil Engineering,Maua Institute of Technology,Maua Square 1, Sao Caetano,Sao Paulo 09580-900, Brazil

Department of Civil Engineering,Federal University of São Carlos,Washington Luis Rd., km 235, SãoCarlos, São Paulo 13565-905

Department of Structural andGeotechnical Engineering,University of Sao Paulo, Prof.Almeida Prado Ave. 83, São Paulo,São Paulo 05508-900, Brazil

2024

10.1520/GTJ20230399

Geotechnical testing journal

Geotechnical testing journal

SCI
ISSN：0149-6115
年,卷(期)：2024.47(6)
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