A5004154675- Geotechnical Engineering and Soil Mechanics
- Geotechnical Engineering and Underground Structures
- Geotechnical Engineering and Soil Stabilization
- Seismic Performance and Analysis
- Geotechnical Engineering and Analysis
- Seismic Waves and Analysis
- Landslides and related hazards
- Soil Moisture and Remote Sensing
- Geophysical and Geoelectrical Methods
- Soil Geostatistics and Mapping
- Fluid Dynamics and Vibration Analysis
- Structural Health Monitoring Techniques
Pontificia Universidad Católica de Chile
2010-2024
National Yang Ming Chiao Tung University
2024
National Taiwan University
2024
National Taiwan University of Science and Technology
2024
University of Colorado Boulder
2019-2022
Universidad Andrés Bello
2014-2018
Dense granular columns (DGCs) are generally known to mitigate the liquefaction hazard through a combination of (1) installation-induced ground densification, (2) enhanced drainage, and (3) shear reinforcement. However, relative contribution these mitigation mechanisms remains poorly understood. A recent case history successful embankment performance on liquefiable site treated with DGCs that had relatively low area replacement ratios (Ar) (where drainage is not notably enhanced) suggested...
This paper presents a probabilistic model for evaluating the liquefaction-triggering hazard in level, layered, and saturated granular soil profiles improved with dense columns (DGCs). The is developed using results of comprehensive numerical parametric study, validated dynamic centrifuge test, subsequently tested available case histories involving DGCs as liquefaction countermeasure. database includes total 30,000, three-dimensional (3D), fully coupled, nonlinear, finite-element simulations...
ResumenEn el contexto de la práctica ingenieril, problema capacidad soporte sísmica fundaciones superficiales generalmente ha sido resuelto, modo indirecto, ya sea considerando un incremento en las tensiones admisibles estáticas del suelo, asociado a probabilidad ocurrencia cierto evento sísmico diseño, o bien adoptando enfoque tipo pseudoestático equivalente.Sin embargo, durante últimas décadas se han desarrollado una serie métodos analíticos que abordan directamente desde punto vista...
Monopile foundations are known as the most common foundation solution for offshore wind turbines (OWTs). However, state of practice designing monopile in high seismicity areas is still limited. In this paper, three-dimensional, fully coupled, nonlinear finite-element analyses were used to evaluate seismic performance hypothetical 5MW on layered, liquefiable sites under motions with and without forward directivity. The numerical results showed that pile movements induced by loading led a bias...
Infrastructure failure due to soil liquefaction has been repeatedly observed in past megathrust earthquakes, causing significant material and structural functionality losses. In most seismic regions, potential is assessed using updated versions of the cyclic-stress-based simplified procedure initially proposed by Seed Idriss 1971. However, application these procedures large-magnitude (Mw > 7.5) subduction earthquakes shown discrepancies between forward predictions field observations,...
Tras el terremoto del Maule 2010 (Mw 8.8), grandes cambios se produjeron en la normativa sísmica a nivelnacional. Uno de los aspectos interesantes fue cambio metodología para clasificación suelos normaNCh433. En pocas palabras, pasó uso parámetros resistencia al dinámicos suelo,como promedio armónico velocidad propagación ondas corte 30 m superiores terreno (Vs30)y periodo predominante (Tg), que evalúa incorporarlo. este estudio, comparan resultados obtenidos por4 equipos trabajo exploran...
Dense granular columns (DGC) have become a common soil improvement strategy for embankment structures founded on liquefiable deposits. However, the state-of-practice design of DGCs is still limited to simplified methods where influence key mitigation mechanisms likelihood triggering considered in decoupled manner. Further, effects soil-column-embankment interaction, performance, site characteristics, layer-to-layer and ground motion's evolutionary characteristics are not included current...
Current practice for seismic design of earth structures considers the use displacement-based methods, which allow a quick and quantitative estimation movement soil masses under earthquake loading. This type procedures are aimed to establish relationship between (i) main parameters, (ii) critical acceleration, (iii) corresponding permanent displacements structure. In this sense, based on well-known Newmark’s sliding block method, several regression models intended purposes have been proposed...