Bernardo Caicedo

Universidad de Los Andes

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Trends

Author Order

Document Type

Co-Authors

Luc Thorel

Université Gustave Eiffel

Luis E. Vallejo

University of Pittsburgh

Juan P. Villacreses

Universidad San Francisco de Quito

Silvia Caro

Universidad de Los Andes

Julián Tristancho

District University of Bogotá

Catalina Lozada

Pontificia Universidad Javeriana

Octavio Coronado

Laboratoire de Mécanique des Sols, Structures et Matériaux

Cristhian Mendoza

Universidad Nacional de Colombia

Jairo Martin Espitia

Pedagogical and Technological University of Colombia

A. Gomes Correia

University of Minho

Cooperative Institutions

Universidad de Los Andes

Centre National de la Recherche Scientifique

Universidad de Los Andes

Universidad Nacional de Colombia

Jet Propulsion Laboratory

Universidade de Brasília

Laboratoire de Mécanique des Sols, Structures et Matériaux

California Institute of Technology

CentraleSupélec

Université Paris-Saclay

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Field

An integrated method to optimise the infrastructure costs of bus rapid transit systems

Structure and Infrastructure Engineering (2010)

Bernardo Caicedo Manuel Ocampo Mauricio Sánchez‐Silva

A significant effort has been directed in many countries to develop economically feasible transportation solutions which include, in many cases, buses that run on express lanes or that are used as part of a feeder system; these systems are identified as ‘bus rapid transit systems’ (BRT). The purpose of this paper is to present a reliability cost-based optimisation model of these systems. The model couples the transportation requirements and the mechanical performance of asphalt pavement structures. Also it includes critical transportation parameters such as bus sizes, frequency of the routes and passenger demands. Regarding the pavement, the model takes into account the life-cycle of existing or new pavements, which involves a stochastic model of the pavement's mechanical properties and its overall performance. The model is applied to the actual case of Bogota's rapid transportation system, i.e. Transmilenio, showing the importance of this integrated approach to build efficient BRT systems.

Bus rapid transit

Life Cycle Costing

Transit system

10.1080/15732479.2010.499951

Cite

Citations (7)

Micromechanical Characterization of Diatom Frustules of Multiple Origin

Daniel Alberto Zuluaga Astudillo Juan Carlos Ruge Bernardo Caicedo

Characterization

10.2139/ssrn.4972717

Cite

Citations (0)

A Study of the Influence of Water Content Profile on the Dynamic Behavior of Rammed Earth Structures

Proceedings of the World Congress on Civil, Structural, and Environmental Engineering (2021)

Juan P. Villacreses Bernardo Caicedo Felipe Poveda Fabricio Yépez Laura Ibagón

This research assesses the influence of water content in the dynamic performance of rammed earth structures.The procedure uses a finite element model based on hypothetical moisture profiles.The finite element model uses six layers where materials were assigned based on the water content profile.The research uses seven water profiles to establish the saturation degree as a function of wall depth.The mechanical properties for each layer were assigned according to the water content profile.Finally, the frequencies and modal shapes of the structure were calculated using a finite element model.The results showed an important change in the structural stiffness.Then, a response spectrum of accelerations was used to analyze the difference in the dynamic response of the structure due to the water content profile.The results suggest that the walls have different seismic behavior at the beginning of the construction phase and change with the different residual water content states of the structure.

Rammed Earth

Content (measure theory)

10.11159/icgre21.lx.103

Cite

Citations (1)

Physical modelling on unsaturated soils using centrifuge

CRC Press eBooks (2010)

Bernardo Caicedo Julián Tristancho Luc Thorel

Centrifuge

Physical modelling

10.1201/b10526-98

Cite

Citations (0)

REDUCTION DES VIBRATIONS EN CENTRIFUGEUSE A L'AIDE DE BARRIERES EN POLYSTYRENE EXPANSE MODELING OF VIBRATION ISOLATION USING EXPANDED POLYSTYRENE EPS BARRIERS IN CENTRIFUGE

Carol Murillo Luc Thorel Bernardo Caicedo

RESUME – Avec une barriere en polystyrene expanse, une etude parametrique de reduction des vibrations se propageant dans un sable de Fontainebleau est realisee en centrifugeuse. L’efficacite du systeme d‘isolation est discutee selon la geometrie de la barriere (epaisseur, profondeur, distance a la source) et les frequences (150 a 2000Hz) generees par une ceramique piezoelectrique.

Expanded polystyrene

Centrifuge

Source

Cite

Citations (0)

Homogenization of Rammed Earth Walls Under Changing Environmental Conditions

Juan P. Villacreses Bernardo Caicedo Eduardo J. Rueda Laura Ibagon Johana Acosta

The modelling of rammed earth walls under changing environmental conditions using a finite element approach requires knowledge of the mechanical properties of soils in a wide range of water contents, since in most cases these elements are present in direct contact with humidity and radiation that modify the state of the soil according to its level of exposure, creating several materials in the same element, taking into account that the properties and behaviour of a soil are a function of interaction between its phases. This heterogeneity in the behaviour of the soil, either due to the interaction of different types of soils or being the same soil with different conditions, makes its analysis difficult and therefore it is pertinent to explore methodologies that reduce this variability. For this reason, this research analyses a multilayer model of a soil wall that presents variation in water content throughout its thickness (simulating different states in the material) and compares it with a model that considers a soil with homogeneous characteristics. As a result, the homogenization of rammed earth walls using the Hashin & Shtrikman upper bound gives similar results to simulations of heterogenous rammed earth walls.

Homogenization

Rammed Earth

10.2139/ssrn.4618226

Cite

Citations (1)

Elastic response of unsaturated soils

CRC Press eBooks (2013)

Carol Murillo Bernardo Caicedo Luc Thorel Christophe Dano

Most of the studies involving bender elements have been performed on purely frictional sands or soft cohesive soils (clays). The present study provides new results about the elastic properties of intermediate unsaturated soils made of mixtures of sand and clay, identified using the benderextender elements testing device.

10.1201/b14393-46

Cite

Citations (0)

Centrifuge modelling of wetting-induced collapse in embankment base

CRC Press eBooks (2013)

Luc Thorel Ibatsam Khokhar Valéry Ferber Bernardo Caicedo

Regarding soil physical properties, the dry density after compaction is the main parameter affecting wetting-induced deformations under vertical stress (Lawton et al., 1992; Rao et al., 2000; Estabragh et al., 2004; Ferber et al., 2008). Moreover, the long-proposed experimental methods for the prediction of wetting-induced deformations, like the single or double oedometer tests (Jennings & Knights, 1957), though remaining pertinent (Basma et al., 1992), need to be compared with observations like physical models. Physical modelling has been used to study the collapse of embankments (Miller et al., 2001) without focusing on the relationships between initial dry density and settlements.

Centrifuge

Base (topology)

10.1201/b14393-22

Cite

Citations (0)

Modelling crushing of granular materials using Markovian processes

CRC Press eBooks (2014)

Bernardo Caicedo Manuel Ocampo Luis E. Vallejo

10.1201/b17395-177

Cite

Citations (0)

Structural features and hydro-mechanical behaviour of a compacted andesitic volcanic soil

Géotechnique Letters (2018)

O. Hernandez Manoel Porfírio Cordão Neto Bernardo Caicedo

Soils derived from volcanic ash comprise 0·84% of the soils worldwide and this proportion increases in countries located on the Andean mountains. These soils have very unusual properties due to the presence of clay minerals not found in sedimentary soils. Particularly, the hydromechanical and structural properties of volcanic soils undergo huge changes depending on the degree of pre-drying of the samples. Although the main characteristics of volcanic soils have been studied during the last 50 years, few works focused on the hydromechanical and structural behaviour of compacted volcanic soils, which forms the purpose of this study. The behaviour of volcanic soil was evaluated using mineralogical characterisation tests, thermogravimetric analysis, compressibility, direct shear, water-retention curves and distribution of pores in the structure. The results showed the high irreversibility of the characteristics of the soil depending on the changes in water content that the soil undergoes before compaction.

Volcanic ash

Andosol

10.1680/jgele.18.00056

Cite

Citations (8)