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Publications (24)
Non-linear dynamic analyses methods generally provide a more adjusted modeling of the structural response for strong seismic events. Such a dynamic seismic nonlinear
evaluation took place for six buildings: two 5 story-height, two 12 story-height and two 20 story-high and with a regular configuration. The structural systems of
the buildings complie...
Los métodos de análisis dinámico no lineal generalmente proporcionan modelos más ajustados de la respuesta estructural para fuertes movimientos sísmicos. Por
ello, se realizó una evaluación sísmica no lineal dinámica de seis edificaciones: dos de 5, dos de 12 y dos de 20 pisos de altura y con una planta regular. El sistema
estructural de los edific...
The present research summarizes the test results of mechanical capacity of built-up structural elements, intending to introduce the possibility of using RTPBB as material for creating structural solutions for temporary housing, and for small houses. Hollow columns and beams models helped in understanding theoretical behavior by using nonlinear stre...
The Escollera Tower was supposed to be the tallest building in Colombia in 2007 with a total projected height of 200.3 m. However, on May 13, 2007, when the tower reached the height of 152.3 m, an unusual wind hit the city of Cartagena, affecting the structure of the building. It swayed approximately 1 m at the tip of construction, resulting in sig...
The present research summarizes the test results of mechanical capacity of built-up structural elements, intending to introduce the possibility of using RTPBB as material for creating structural solutions for temporary housing, and for small houses. Hollow columns and beams models helped in understanding theoretical behavior by using nonlinear stre...
Construction is one of the human activities that contributes most to global warming: It is estimated that between 1970-2004, built environment and new construction originated 70% of global warming emissions. In contemporary buildings, the biggest portion of embodied energy corresponds to structural materials (concrete and reinforcement), taking 59,...
The fatigue properties of two variants of AISI 1018 steel samples were measured in a series of 33 experiments using new kinds of magnetic diagnostics. An MTS-810 servohydraulic test machine applied sinusoidal fully reversed (R = -1) loads under strain (σ) control in the range of 0.0008 (σ) 0.0020. In 28 experiments, the number of cycles to fatigue...
Con ayuda de un SEM, se obtuvo una serie de microgramas de las superficies fracturadas de muestras de dos tipos de acero AISI-1018, después de haber aplicado una serie de ensayos de fatiga con relación de esfuerzo R=-1. Se usaron varios niveles de carga controlada por deformación unitaria en el rango ±0.0008 < s < ±0.0014 siguiendo una carga de tip...
A series of SEM micro-graphs were obtained from the cracked surfaces of samples from two types of AISI-1018 steel after applying fatigue tests at a stress ratio of R=-1. Various strain-control levels were used in the range ±0.0008 ≤ ε ≤ ±0.0014 following a sinusoidal load pattern. From the many micro-graphs obtained, eight types of cracks were dete...
This article is an investigation of buckling of cold-rolled gusset plates subjected to cyclic axial load for various unsupported length-to-thickness ratios (L/e). A total of twelve specimens were tested and their respective time-to-failure (in terms of the number of cycles) were measured. Using the data obtained, the dependence of time-to-failure o...
This research determines the axle loads of trucks traveling on a bridge located in one of the most important corridors of Colombia, using the technique of control BWIM (Bridge Weight in Motion), not used before in the country. Our research group developed a Genetic Algorithm based in a trial test, implementation and monitoring to the bridge called...
This research determines the axle loads of trucks traveling on a bridge located in one of the most important corridors of Colombia, using the technique of control BWIM (Bridge Weight in Motion), not used before in the country. Our research group developed a Genetic Algorithm based in a trial test, implementation and monitoring to the bridge called...
Este artículos presenta una propuesta para aplicar técnicas de optimización a la calibración de modelos de elementos finitos en análisis estructural. Concretamente, estas técnicas son aplicadas a un modelo computacional del puente Puerto Salgar, localizado en Colombia, sobre la carretera Honda-Río Ermitaño, en la abscisa correspondiente al cruce so...
This document presents the analysis of seismic vulnerability and load capacity for Cesar Gaviria Trujilo Viaduct, by means of structural reliability techniques based on instrumentation works. Such study includes: geophysical trial tests, trials tests on material mechanical properties, environmental vibrations, measurements on the effects of traffic...
This document presents the analysis of seismic vulnerability and load capacity for Cesar Gaviria Trujilo Viaduct, by means of structural reliability techniques based on instrumentation works. Such study includes: geophysical trial tests, trials tests on material mechanical properties, environmental vibrations, measurements on the effects of traffic...
This article is an evaluation of bridge collapse causes in Colombia, based on the study of 63 real cases of reported failures since 1986. Through the analysis of each failure case, the main causes of total or partial collapse of the bridge structures were identified and studied. The 36% of the cases studied corresponds to steel structures that fail...
In this document, seismic vulnerability and load carrying capacity analyses are presented for a bridge in Colombia after monitoring by means of reliability of structures. Results of this work are part of a new methodology to evaluate existing bridges carried out though a partnership among University – Private Companies – and Goverment. This study h...
In this document, seismic vulnerability and load carrying capacity analyses are presented for a bridge in Colombia after monitoring by means of reliability of structures. Results of this work are part of a new methodology to evaluate existing bridges carried out though a partnership among University - Private Companies - and Goverment. This study h...
El grupo de investigación denominado Estructuras, viene trabajando, desde hace tres años en el tema de evaluación de puentes existentes, mediante técnicas de confiabilidad estructural, apoyada en instrumentación. Dentro de este proyecto se desarrolló un prototipo consistente en un modelo a escala (1:20) del puente en acero Puerto Salgar, cuya obra...
This paper shows a reliability analysis evaluation of the main frames of one of the most important Colombian bridges. The evaluation was carried out by employing the following techniques: geometrical detailing, mechanical tests, traffic counting, load deformation tests, structural calibration of the bridge model, instrumentation, electrical monitor...
Research group "Estructuras", has been working since year 2002 in the evaluation of existing bridges using structural reliability techniques supported by instrumentation. As part of this project a fully 1:20 scaled model of the Puerto Salgar Bridge was developed. This Bridge is one of the most important in Colombia. T he prototype measures, in real...
