Home » Research
Category Archives: Research
Application of LEM, FEM and DEM in stability analysis of highly jointed rock slopes
Melentijevic, S., Gutiérrez-Ch, J.G., Berisavljević, Z., Graterol, E.P., Berisavljević, D. Abstract The comparative slope stability analysis of the highly fractured rock slope by three different methods is presented. The usually applied slope stability methods of the rock mass obeying the Hoek and Brown failure criterion comprises the limit equi-librium and/or the finite element method, quantifying […]
DEM modelling of shaft load transfer behavior of rock-socketed piles
Gutiérrez-Ch, J.G., Melentijevic, S., Senent, S., Jimenez, R. Abstract The behavior of rock-socketed piles (RSPs) has been the aim of extensive research through field load tests, centrifuge tests, numerical simulations, etc. In this work, the Distinct Element Method (DEM) is employed to study the load transfer behavior at the shaft of rough rock-socketed piles (RSPs) […]
Centrifuge Tests on Rock-Socketed Piles: Effect of Socket Roughness on Shaft Resistance
J.G. Gutiérrez-Ch, G. Song, Heron, C.M., Marshall, A., Jimenez, R. Abstract Preliminary estimations of shaft resistance of rock-socketed piles are usually conducted using empirical formulations that relate to the uniaxial compressive strength (𝜎𝑐) of the weaker material involved (intact rock or pile). However, there are other factors, such as the degree of socket roughness, that […]
Numerical modelling of pore water pressure response beneath a raft foundation during real river floods
E.P. Graterol, J.G. Gutiérrez-Ch, L. Mediero, S. Senent /*! elementor – v3.22.0 – 17-06-2024 */ .elementor-heading-title{padding:0;margin:0;line-height:1}.elementor-widget-heading .elementor-heading-title[class*=elementor-size-]>a{color:inherit;font-size:inherit;line-height:inherit}.elementor-widget-heading .elementor-heading-title.elementor-size-small{font-size:15px}.elementor-widget-heading .elementor-heading-title.elementor-size-medium{font-size:19px}.elementor-widget-heading .elementor-heading-title.elementor-size-large{font-size:29px}.elementor-widget-heading .elementor-heading-title.elementor-size-xl{font-size:39px}.elementor-widget-heading .elementor-heading-title.elementor-size-xxl{font-size:59px} Abstract Tall buildings with basement levels are increasingly being built due to need for space in large cities. Frequently, such structures are built involving a raft foundation and diaphragm walls below the water table. In addition, sometimes such buildings are […]
Discrete element modelling of rock creep behaviour using rate process theory
J.G. Gutiérrez-Ch, S. Senent, E. Estebanez, R. Jimenez /*! elementor – v3.21.0 – 08-05-2024 */ .elementor-heading-title{padding:0;margin:0;line-height:1}.elementor-widget-heading .elementor-heading-title[class*=elementor-size-]>a{color:inherit;font-size:inherit;line-height:inherit}.elementor-widget-heading .elementor-heading-title.elementor-size-small{font-size:15px}.elementor-widget-heading .elementor-heading-title.elementor-size-medium{font-size:19px}.elementor-widget-heading .elementor-heading-title.elementor-size-large{font-size:29px}.elementor-widget-heading .elementor-heading-title.elementor-size-xl{font-size:39px}.elementor-widget-heading .elementor-heading-title.elementor-size-xxl{font-size:59px} Abstract Rock creep behaviour is crucial in many rock engineering projects. Different approaches have been proposed to model rock creep behaviour; however, many cannot reproduce tertiary creep (i.e., accelerating strain rates leading to rock failure). In this work, the distinct […]
A DEM-Based Factor to Design Rock-Socketed Piles Considering Socket Roughness
J.G. Gutiérrez-Ch, S. Senent, S. Melentijevic, R. Jimenez Abstract The Distinct Element Method (DEM) has gained recent attention to study geotechnical designs with rock-concrete or rock–rock interfaces, such as rock-socketed piles. In this work, 3D DEM models with non-standard contacts laws (the Smooth-Joint and Flat-Joint contact models) are proposed to analyze the response of axially loaded rock-socketed piles […]
Distinct-Element Method Simulations of Rock-Socketed Piles: Estimation of Side Shear Resistance Considering Socket Roughness
J.G. Gutiérrez-Ch, S. Melentijevic, S. Senent, R. Jimenez Abstract Rock-socketed piles are foundational elements designed to transmit large concentrated loads to stronger materials located at greater depths. The rock-socket side shear resistance is commonly estimated using empirical criteria as a percentage of the rock or concrete uniaxial compressive strength. However, this approach neglects the influence of other important aspects, such […]
Distinct element method simulations of rock-concrete interfaces under different boundary conditions
J.G. Gutiérrez-Ch, S. Senent, S. Melentijevic, R. Jimenez Abstract The shear behaviour of concrete-rock interfaces has been the aim of extensive research in geotechnical engineering applications such as rock socketed piles, rock bolts and concrete dam arch bridge foundations. Several experimental studies through direct shear tests have been conducted to evaluate the shear behaviour of rock-concrete interfaces under CNL (Constant Normal Load) and […]
DEM simulation of rock creep in tunnels using Rate Process Theory
J.G. Gutiérrez-Ch, S. Senent, P. Zeng , R. Jimenez Abstract The time-dependent (creep) behaviour of rocks affects the safety and stability of tunnels excavated in weak rocks and at great depths. Several theories have been proposed to simulate the creep deformation in rock; i.e., the progressive time-dependent damage that rocks (or other materials) exhibit under constant stress. However, most of these theories do […]
Rock shear creep modelling: DEM – Rate process theory approach
J.G. Gutiérrez-Ch, S. Senent, E.P. Graterol, P. Zeng , R. Jimenez Abstract Understanding the rock creep behavior is necessary to determine the long-term strength and safety of several geotechnical designs. There are several formulations to study the rock creep; however, most of them do not properly capture the tertiary creep. To overcome such limitation, model improvements have been made and new creep models (e.g., creep models […]