Francisco Grajales

Francisco Grajales
Universidad Tecnológica de Panamá | UTP · School of Civil Engineering

Doctor of Philosophy

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7
Publications
1,849
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31
Citations
Additional affiliations
January 2008 - July 2018
Universidad Tecnológica de Panamá
Position
  • Professor

Publications

Publications (7)
Article
Geotechnical centrifuge tests were conducted to examine the behavior of low-aspect-ratio piles and caissons in clayey soils subject to high moment loading. Model piles with an aspect ratio of two were tested in the 150g-t centrifuge at Rensselaer Polytechnic Institute. Results include moment-inclination and force-displacement response for different...
Conference Paper
Many offshore structures currently in use are supported by piles with large length-to-diameter aspect ratios, because it is well known that such foundations can hold large forces and moments. In environments where long piles are not suitable, structures will use foundations with very low aspect ratios such as skirts and mats. Capacity of long piles...
Conference Paper
This paper presents a series of studies in which traditional upper bound plastic limit analysis (PLA) methods are modified to accommodate non-linear strength profiles which correspond to soils with crust. The collapse mechanism presented comprises a surface failure wedge, a flow-around region and a spherical base failure surface. Results are compar...
Conference Paper
In the ever expanding quest to understand the nature and behavior of soil, translucent and even transparent media have been developed to serve as soil simulates. These artificial soils can be used in experimental models to make visual measurement of phenomena such as geosystem kinematics, soil mass movement, soil particle motion, and pore fluid flo...
Conference Paper
Full-text available
Geotechnical centrifuge tests were conducted to examine monotonic behavior of low aspect ratio piles in soft clays. Monopiles with aspect ratio of two were tested in the 150g-ton centrifuge at Rensselaer Polytechnic Institute. Initial pile test results include force-displacement for displacement controlled loading. This paper focuses on ultimate ca...
Conference Paper
Full-text available
Offshore wind power has gained momentum as a means to diversify the world s energy infrastructure; however, little is still known of the global stiffness behavior of the large diameter low aspect ratio monopiles which have become the foundation of choice for offshore wind towers. Traditionally, offshore foundations have been associated with gravity...
Conference Paper
Installation of driven piles and suction caissons in clayey soils generates excess pore pressures that temporarily reduce load capacity due to side resistance. Time dependent dissipation of these excess pore pressures leads to recovery of side resistance, a process known as ‘setup’. Since many facilities cannot be put into operation until sufficien...

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