Advanced Numerical Simulations of Laboratory Tests for Triaxial Apparatus

<p>Numerical simulations of laboratory tests in triaxial apparatus have become increasingly important for modeling soil behavior in geotechnical earthquake engineering. These simulations provide valuable insights into soil mechanics and help validate experimental results. The constitutive models in numerical simualtions should provide a mathematical description of the mechanical behaviour of material and represent the most important aspects of soil behaviour. Understanding these limitations is crucial for selecting appropriate models for specific applications and interpreting their results within the proper context. Unfortunately, there is no single material model which can simulate all soil behaviours successfully. Many successful applications of numerical models for simulation of sand behavior show the importance of both triaxial tests and the constitutive relations used in simulation. In this work several triaxial tests have been simulated using different material models while the soil model is simulated as multiphase medium. The triaxial monotonic tests have been performed at the Laboratory for soil dynamics and foundation engineering at the Institute of Earthquake Engineering and Engineering Seismology in Skopje, N.Macedonia (IZIIS) with the presence of colleagues from University of Nish, Serbia. The collaborative nature of this research enhances the validity and reliability of the experimental results. The numerical analyses were performed using the finite element software Plaxis, which offers a comprehensive suite of constitutive models suitable for geotechnical applications. The findings of this comparative analysis contribute to the broader understanding of soil behavior under seismic conditions and provide practical guidelines for selecting appropriate material models in geotechnical earthquake engineering applications.</p>