Seismic soil-structure interaction in piles and piers: case III

José Medina

In the proceedings of: GEO2011: 64th Canadian Geotechnical Conference, 14th Pan-American Conference on Soil Mechanics and Geotechnical Engineering, 5th Pan-American Conference on Teaching and Learning of Geotechnical Engineering

Session: Other General

ABSTRACT: A new matrix procedure is presented to determine soil-foundation contact reaction and lateral displacement on piles and piers in seismic conditions. The foundation is considered free to rotate at the head, with embedding at the point, and the base can to rotate by deformation of the surrounding material. The method takes into account the compressibility of the soil, the rigidity of the foundation and the drag forces induced by the lateral displacements of the soil by seismic action. The procedure has the advantages of not being iterative, of being easily programmed and readily extended to other boundary conditions, such as other kinds of foundations -shallow and deep-, and different subsoil conditions.

RESUMEN: Se expone un nuevo procedimiento matricial para determinar los esfuerzos de contacto y los desplazamientos horizontales en pilotes o pilas de cimentación sujetos a fuerzas sísmicas. Se considera que la pila puede girar libremente en la cabeza, con empotramiento en la base y giro en ésta por deformación del material que la rodea. El método toma en cuenta las características de compresibilidad de la masa de suelo, la rigidez de la cimentación y las fuerzas de arrastre que actúan contra la cimentación debidas al desplazamiento horizontal de la masa de suelo durante la acción sísmica. El método presenta las ventajas de no ser iterativo, de la sencillez de su programación y su posibilidad de extenderse con facilidad a otras condiciones de frontera, otros tipos de cimentaciones -superficiales o profundas- y distintas condiciones del subsuelo de cimentación.

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