3 research outputs found
Modelación física de la capacidad de carga lateral de pilotes de madera en suelos granulares
No full textThe analysis of piles subjected to lateral loads is a very important aspect in the design of both conventional structures and maritime infrastructure. This article presents results of an experimental investigation carried out under the hypothesis that it is possible to replicate the behavior of piles with scale tests so that these data can be useful in future investigations and designs. As part of the research, an apparatus was developed that allows the application of lateral loading on small-scale pile models. For the experiments presented here, sandy soil and wooden piles were used. The data were validated by using analytical methods that allow estimating the ultimate capacity of piles under lateral loads. The results show a good correlation between the experimental results and the analytical predictions.El análisis de pilotes sometidos a cargas laterales es un aspecto de suma importancia dentro del diseño de estructuras tanto convencionales como también infraestructura marítima. Este artículo presenta resultados de una investigación experimental realizada bajo la hipótesis de que es posible replicar el comportamiento de pilotes con pruebas a escala de modo que estos datos puedan ser de utilidad en futuras investigaciones y diseños. Como parte de la investigación, se desarrolló un aparato que permite la aplicación de carga lateral en modelos de pilotes a pequeña escala. Para los experimentos aquí presentados, se utilizó suelo arenoso y pilotes de madera. Los datos fueron validados mediante la utilización de métodos analíticos que permiten estimar la capacidad última de pilotes bajo cargas laterales. Los resultados muestran una buena correlación entre los resultados experimentales y las predicciones analíticas
Estudio Sísmico de Zonas Portuarias de David Mediante las Técnicas de Razón Espectral H/V (HVSR) y Refracción de Microtremores (ReMi)
No full textLa finalidad de este estudio es realizar una clasificación de los suelos en la zona costera de la ciudad de David y alrededores mediante las técnicas de HVSR y ReMi. Uno de los impactos que generará esta investigación (y sus estudios consecuentes) estará orientada hacia la elaboración de normativas actualizadas para el diseño y construcción de futuras estructuras portuarias y no portuarias en la ciudad de David, tomando en cuenta las vibraciones y fuerzas sísmicas. Es importante mencionar que este tipo de información es muy escasa. Adicionalmente, de darse un evento extremo en Chiriquí, la correcta construcción de estructuras representaría un factor importante de optimización de recursos económicos y contribuirá a la mitigación de pérdidas humanas
Horizontal-to-Vertical Spectral Ratios and Refraction Microtremor Analyses for Seismic Site Effects and Soil Classification in the City of David, Western Panama
No full textThe City of David constitutes one of the most important commercial centers of the Republic of Panama. However, it is located on a coastal plane, close to an area with high seismic activity and has been affected by significant earthquakes (18 July 1934, Mw = 7.4 and 12 March 1962, Mw = 6.7). The goal of this study is to estimate the seismic effects and to classify the soil in the City of David. The experimental work entailed the measurement of environmental noise for H/V spectral ratio (HVSR) analyzed at 22 stations. A series of microtremor refraction studies (ReMi) at six stations distributed from north to south of the city was also performed. The stations were distributed around urban areas of the city, which are characterized by the presence of water supply, sewerage, buildings, roads, etc. The spectral analysis of environmental noise allowed the generation of three different types of maps: First, predominant frequency maps (f0) with zones composed mainly of rigid and semi-rigid soils in the southern end of the city and rigid soils in the central and northern regions. Secondly, maximum H/V amplitude maps (A0) which evidence a low range of HVSR amplitude in the city, ranging from 1.1 to 3.8. Finally, liquefaction vulnerability (Kg) maps, with values less than 2 Hz−1, representative of a low liquefaction risk. Soil classification using ReMi and calculation of the corresponding Vs30 reveal type D soils, which correlate well with results obtained using HVSR analyses. A comparison between HVSR and ReMi shows that HVSR curves that exhibit clear peaks tend to be related to ReMi stations that presented relatively large shear-wave velocity contrasts at some depth. The results from this research are intended to aid the decision-making process related to the future development of the city, as well as government level maintenance and mitigation plans
