Analysis of bending stresses in soil beams

Ajaz, A.; Parry, R. H. G.

doi:10.1680/geot.1975.25.3.586

Cited by 9 publications

(10 citation statements)

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“…This method can be an interesting tool to help us understanding the mechanical behaviour of clay layers. Ajaz and Parry (1975) proposed an alternative suitable analytical model (differential model) to interpret and analyse the bending tests on clay soils. This model does not assume a preferred stress-strain relationship, the behaviour law is unknown…”

Section: Predicting the Bending Test Resultsmentioning

confidence: 99%

“…We can also note that the differential method gives a higher stresses values compared with those obtained by the numerical model. According to several authors (Ajaz and Parry, 1975;Satyanarayana and Satyanarayana, 1972;Ramanathan and Raman, 1975), the ratio between the compression and the tensile stresses varies between 1 and 3 on experimental beam tests. This ratio increases with the increase of water content and becomes more and more sensitive.…”

Section: Comparison Between the Dem And Analytical Modelmentioning

confidence: 99%

“…In the literature, three methods were proposed. The first model is the classical elastic beam theory, based on the assumption that the Young's modulus has the same value in tension as in compression (Ajaz and Parry, 1975). The tensile strength is directly obtained using the measurement of applied force during the test.…”

Section: Introductionmentioning

confidence: 99%

“…The tensile strength is directly obtained using the measurement of applied force during the test. The second model, called the direct method or bi-modular method, keeps the assumption that the stress is proportional to strain, but the value of Young's modulus in tension may differ from that in compression (Ajaz and Parry, 1975). In this method the measurement of the strains in the extreme fibres is required in addition.…”

Section: Introductionmentioning

confidence: 99%

“…The behaviour law is so unknown (Prentis, 1951). Besides, this method has been appeared as an alternative analytical model to interpret the bending tests (Ajaz and Parry, 1975).…”

Section: Introductionmentioning

confidence: 99%

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Numerical study of bending test on compacted clay by Discrete Element Method: tensile strength determination

Ammeri¹,

Jamei²,

Bouassida³

et al. 2009

IJCAT

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The study of the tensile behaviour of clay is one of the topics which requires a specific lighting especially when one pays a close attention to the pathology of work built with or on clays subjected to significant tensile forces. Therefore, failure or damage of clay, under specific conditions, can be related to tensile stress limit and not to shear stress limit. It is the case of compacted clay liners in landfill cap cover subjected to differential settlements within the waste. In order to study the tensile compacted clay behaviour, a series of laboratory bending tests were carried out. The analysis of the results and the determination of relevant parameters are difficult. Extrapolation to mechanical clay behaviour could not be directly obtained. On the basis of the test results, different numerical simulations using Discrete Element Method were performed and compared with an analytical model, which seems to be the most suitable to interpret bending tests results for the clay soils. As main result, the Discrete Element Method confirms that the compression stress remains linear function of the strain during the bending test until the failure. However, the tensile stresses increase as a non-linear function. For the tensile strength determination, the analytical differential model remains efficient only when the tensile strain field is well measured.

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Section: Predicting the Bending Test Resultsmentioning

confidence: 99%

Section: Comparison Between the Dem And Analytical Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…The behaviour law is so unknown (Prentis, 1951). Besides, this method has been appeared as an alternative analytical model to interpret the bending tests (Ajaz and Parry, 1975).…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Numerical study of bending test on compacted clay by Discrete Element Method: tensile strength determination

Ammeri¹,

Jamei²,

Bouassida³

et al. 2009

IJCAT

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Balkenbiegeversuche an zwei Tonen und Verformbarkeitsnachweis für eine multifunktionale Deponieabdichtung

Vrettos

Becker

2017

Geotechnik

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Für den Nachweis der Verformbarkeit mineralischer Deponieabdichtungen werden Angaben zu den Grenzzugdehnungen benötigt. Biegeversuche stellen eine praxisnahe Alternative zur indirekten Ermittlung dieser Werte dar. Zwei Tone wurden diesbezüglich untersucht. Zum Einsatz kamen Drei‐ und Vier‐Punkt‐Versuche sowie Versuche mit einer flächigen Belastung. Die Rückrechnung der Dehnungen aus den Durchbiegungen erfolgt anhand eines FEM‐Modells des Balkens als Kontinuum und ein Vergleich mit gängigen Methoden der Balkentheorie wird vorgenommen. Die Ergebnisse werden dann für den Nachweis der Verformbarkeit einer multifunktionalen Abdichtung eines Deponie‐auf‐Deponie‐Systems verwendet. Die Beanspruchungen im Deponiekörper werden ebenfalls mittels der FEM bestimmt. Die bodenmechanischen Eingangsparameter werden aus der Auswertung von In‐situ Messungen hergeleitet. Der Beitrag beschreibt die Versuchstechnik, die experimentellen Ergebnisse, die Auswertungsprozedur sowie die einzelnen Schritte der Nachweisführung.

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Crack Initiation and Propagation of Clays Under Indirect Tensile Strength Test by Bending Related to the Initial Suction

Ameur¹,

Hattab²

2017

Advances in Laboratory Testing and Modelling of Soils and Shales (ATMSS)

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Analysis of bending stresses in soil beams

Cited by 9 publications

References 0 publications

Numerical study of bending test on compacted clay by Discrete Element Method: tensile strength determination

Numerical study of bending test on compacted clay by Discrete Element Method: tensile strength determination

Balkenbiegeversuche an zwei Tonen und Verformbarkeitsnachweis für eine multifunktionale Deponieabdichtung

Crack Initiation and Propagation of Clays Under Indirect Tensile Strength Test by Bending Related to the Initial Suction

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