Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Displacement and load transfer mechanisms of geogrids under pullout condition
Reinforcing elements embedded within soil mass improve stabilization through a load transfer mechanism between the soil and the reinforcement. Geogrids are a type of geosynthetic frequently used for soil reinforcement, consisting of equally spaced longitudinal and transverse ribs. Under pullout conditions, the longitudinal ribs are responsible for tensile resistance, while transverse ribs contribute to a passive resistance. This paper describes a new analytical model capable of reproducing both load transfer and displacement mechanisms on the geogrid length, under pullout conditions. The model subdivides the geogrid into rheological units, composed by friction/adhesion and spring elements mounted in line. Friction/adhesion elements respond to the shear component mobilized at the soil/geognd interface. Spring elements respond to the geogrid's tensile elongation. Model parameters are obtained through tensile strength tests on geognds and conventional direct shear tests on soil specimens. The need for instrumented pullout tests becomes therefore eliminated. Results predicted from this new model were compared to instrumented pullout test data from two types of geogrids under various confining stress levels The results revealed that the new model is capable of reasonably predicting load and displacement distributions along the geogrid
Displacement and load transfer mechanisms of geogrids under pullout condition
Reinforcing elements embedded within soil mass improve stabilization through a load transfer mechanism between the soil and the reinforcement. Geogrids are a type of geosynthetic frequently used for soil reinforcement, consisting of equally spaced longitudinal and transverse ribs. Under pullout conditions, the longitudinal ribs are responsible for tensile resistance, while transverse ribs contribute to a passive resistance. This paper describes a new analytical model capable of reproducing both load transfer and displacement mechanisms on the geogrid length, under pullout conditions. The model subdivides the geogrid into rheological units, composed by friction/adhesion and spring elements mounted in line. Friction/adhesion elements respond to the shear component mobilized at the soil/geognd interface. Spring elements respond to the geogrid's tensile elongation. Model parameters are obtained through tensile strength tests on geognds and conventional direct shear tests on soil specimens. The need for instrumented pullout tests becomes therefore eliminated. Results predicted from this new model were compared to instrumented pullout test data from two types of geogrids under various confining stress levels The results revealed that the new model is capable of reasonably predicting load and displacement distributions along the geogrid
Displacement and load transfer mechanisms of geogrids under pullout condition
Verschiebungs- und Kraftübertragungsmechanismen für Geogitter unter Auszieh-Bedingungen
Sieira, Ana Cristina C.F. (Autor:in) / Gerscovich, Denise M.S. (Autor:in) / Sayao, Alberto S.F.J. (Autor:in)
Geotextiles and Geomembranes ; 27 ; 241-253
2009
13 Seiten, 23 Bilder, 4 Tabellen, 34 Quellen
Aufsatz (Zeitschrift)
Englisch
Displacement and load transfer mechanisms of geogrids under pullout condition
| Online Contents | 2009
Displacement and load transfer mechanisms of geogrids under pullout condition
| Online Contents | 2009
A Realistic Stress Transfer Model for Geogrids in Pullout
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Experimental Behavior of Polymeric Geogrids in Pullout
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Long-Term Pullout Behavior of Polymeric Geogrids
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