Parametric analysis on bridge reinforced concrete elevated pile-cap foundations

Blanco Fernández, Guillermo (2015). Parametric analysis on bridge reinforced concrete elevated pile-cap foundations. Thesis (Master thesis), E.T.S.I. Caminos, Canales y Puertos (UPM).

Description

Title: Parametric analysis on bridge reinforced concrete elevated pile-cap foundations
Author/s:
  • Blanco Fernández, Guillermo
Contributor/s:
  • Ye, Aijun
  • Goicolea Ruigómez, José María
Item Type: Thesis (Master thesis)
Masters title: Ingeniería de las Estructuras, Cimentaciones y Materiales
Date: 2015
Subjects:
Freetext Keywords: Capacity protection principle; Elevated RC pile-cap foundation; Cyclic loading; Pushover analysis; Ductility
Faculty: E.T.S.I. Caminos, Canales y Puertos (UPM)
Department: Mecánica de Medios Continuos y Teoría de Estructuras
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

Current design practices recommend to comply with the capacity protection principle, which pays special attention to ensuring an elastic response of the foundations under ground motion events. However, in cases such as elevated reinforced concrete (RC) pile-cap foundation typologies, this design criterion may lead to conservative designs, with excessively high construction costs. Reinforced concrete elevated pile-cap foundations is a system formed by a group of partially embedded piles connected through an aboveground stayed cap and embedded in soil. In the cases when they are subjected to ground motions, the piles suffer large bending moments that make it difficult to maintain their behavior within the elastic range of deformations. Aiming to make an in-depth analysis of the nonlinear behavior of elevated pile-cap foundations, a cyclic loading test was performed on a concrete 2x3 pile configuration specimen of elevated pile-cap foundation. Two results of this test, the failure mechanism and the ductile behavior, were used for the calibration of a numerical model built in OpenSees framework, by using a pushover analysis. The calibration of the numerical model enabled an in-depth study of the seismic nonlinear response of this kind of foundations. A parametric analysis was carried for this purpose, aiming to study how sensitive RC elevated pile-cap foundations are, when subjected to variations in the diameter of piles, reinforcement ratios, external loads, soil density or multilayer configurations. This analysis provided a set of ductility factors that can be used as a reference for design practices and which correspond to each of the cases analyzed.

More information

Item ID: 37244
DC Identifier: http://oa.upm.es/37244/
OAI Identifier: oai:oa.upm.es:37244
Deposited by: Biblioteca ETSI Caminos
Deposited on: 30 Jul 2015 07:55
Last Modified: 30 Jul 2015 07:55
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