extensiÓn de una ecuaciÓn constitutiva hipoplÁstica para simular ensayos triaxiales cÍclicos extension of a hypoplastic constitutive equation to simulate cyclic triaxial tests
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2010
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Abstract
La ecuación constitutiva hipoplástica es una herramienta matemática que puede simular de manera confiable el comportamiento que experimentan materiales granulares no tratados (GNT) bajo carga estática y monotónica. Sin embargo, para el caso de cargas cíclicas, como las que ocurren en un pavimento, la ecuación sobreestima la acumulación de las deformaciones permanentes. En el presente artículo se presenta una versión extendida de la ecuación constitutiva hipoplástica de Wolffersdorff (1996) (una de las más utilizadas actualmente en el mundo) que intenta mejorar dicha limitación. Adicionalmente se presenta la simulación de ensayos triaxiales cíclicos con presión de confinamiento constante y variable (los cuales son los más utilizados en el mundo para estudiar el comportamiento de GNT en pavimentos) utilizando la versión extendida. Las simulaciones realizadas demuestran la amplia capacidad que tiene la ecuación hipoplástica para reproducir el comportamiento que el material granular experimenta en los ensayos cíclicos.
Hypoplastic constitutive equation is a mathematical tool which offers the possibility to reliably simulate unbound granular materials (UGM) behavior under static and monotonic loads. However, such equation overestimates the permanent strain accumulation under cyclic loads (e.g. in a pavement structure). This paper presents an extension of the Wolffersdorff's Hypoplastic constitutive equation (1996) (currently one of the most used equations), aiming for improving its performance under cyclic loads. Beside this, cyclic triaxial tests simulations are presented using the extended version with constant and variable confining pressures. Triaxial tests are the most used when studying UGM behavior in pavements. Simulation results demonstrated the ability of the proposed equation for reproducing the behavior of granular materials under cyclic tests.
Hypoplastic constitutive equation is a mathematical tool which offers the possibility to reliably simulate unbound granular materials (UGM) behavior under static and monotonic loads. However, such equation overestimates the permanent strain accumulation under cyclic loads (e.g. in a pavement structure). This paper presents an extension of the Wolffersdorff's Hypoplastic constitutive equation (1996) (currently one of the most used equations), aiming for improving its performance under cyclic loads. Beside this, cyclic triaxial tests simulations are presented using the extended version with constant and variable confining pressures. Triaxial tests are the most used when studying UGM behavior in pavements. Simulation results demonstrated the ability of the proposed equation for reproducing the behavior of granular materials under cyclic tests.
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| Authors | ;Hugo Alexander Rondón Quintana |
| Journal | international journal of electrical and computer engineering |
| Year | 2010 |
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