Browsing by Autor "Alberto Sarria"

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    Crisis y realidades de la ingeniería civil colombiana
    (Universidad de Los Andes, 2003) Alberto Sarria
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    Efecto de las diferentes componentes sísmicas de moviemiento sobre las naves industriales de grandes luces
    (Universidad de Los Andes, 2002) Daniel Ruiz; Alberto Sarria
    Mediante análisis dinámicos contra el tiempo y análisis de “Pushover” se estudió el efecto de los sismos sobre las armaduras y demás elementos estructurales de las naves industriales de grandes luces. Se encontró que para este tipo de estructuras la componente sísmica vertical podría llegar a tener una importancia relativa en el campo cercano de los sismos. Así mismo se determinó que este tipo de estructuras presenta amortiguamientos con respecto al crítico y valores de R relativamente bajos. Finalmente se estableció que la variabilidad espacial de la onda sísmica representa una combinación de carga importante para este tipo de estructuras.
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    Exploración geofísica y medio ambiente
    (Universidad de Los Andes, 2001) Alberto Sarria
    Seismic surveying for hydrocarbon detection is done in several ways; perhaps the most extended procedure is the reflection method where small charges of seimigel are detonated and reflections are gathered in geophones. The analysis of the records allow the geophysicist to estimate the spatial position of geologic formations that may accumulate hydrocarbons. There is the concern if detonations have some environmental impact. This paper explores it and concludes that if some minimum distances from the explosion to constructions and the like are maintained, there is no possibility to affect the environment.
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    Non-Structural masonry walls strengthened with GFRP laminates
    (Universidad de Los Andes, 2002) E.D. Bastidas; Larissa Molina; Luis E. Yamín; Alberto Sarria; J.P. Ortega
    One of the major construction systems in Colombia, and in general throughout Latin America, consists of multistory moment resisting reinforced concrete (RC) frames filled with unreinforced masonry (URM) walls. These non-structural masonry walls are conventionally built using clay tiles. Due to the high seismic activity in Colombia, this kind of masonry wall is prone to damage. One of the alternatives being explored in Colombia to prevent the failure or lessen the damages in clay tile URM walls is to strengthen them with Glass Fiber Reinforced Polymer (GFRP) laminates. This paper presents promising results of experimental tests conducted on twenty-six wallettes of 9x70x70 cm and 9x120x120 cm, which were strengthened with different layouts of GFRP laminates. In addition, a full-scale wall was tested to validate the technology. The paper discusses the effect of GFRP laminates on the failure mechanisms, capacity and ductility parameters as well as on the overall reduction of earthquake damage for clay tile URM walls.