This paper presents the results of free vibration tests carried out on a near-shore steel pipe pile vibrodriven into soft marine clay. The tests were carried out by quickly releasing a free head pile from a deformed configuration obtained by applying a quasi-static horizontal loading by means of a hydraulic jack. Different tests were performed at increasing loading levels with the aim of investigating the dynamic soil-water-pile system interaction and investigating how the nonlinear dynamic behaviour develops as the applied load increases. The results of experimental modal analyses, based on the signals recorded by strain gauges applied along the pile, are presented in terms of natural frequencies and damping ratios of the soil-water-pile system and the variations with loading level, due to the nonlinear behaviour of the system, are discussed. The dynamic effects induced on two pipe piles vibrodriven near the loaded pile to form an L-shaped in plan configuration are also discussed on the basis of signals measured by accelerometers applied at the head of the receiver piles; in order to investigate the pile-to-pile dynamic interaction.

NONLINEAR DYNAMIC RESPONSE OF NEAR-SHORE PILES SUBJECTED TO SNAP-BACK TESTING / Francesca, Dezi; Gara, Fabrizio; Roia, Davide. - CD-ROM. - (2014). (Intervento presentato al convegno 15th European Conf. on Earthquake Engineering and Seismology, 15ECEES tenutosi a Istanbul, Turkey nel 25-29 August 2014).

NONLINEAR DYNAMIC RESPONSE OF NEAR-SHORE PILES SUBJECTED TO SNAP-BACK TESTING

GARA, Fabrizio;ROIA, DAVIDE
2014-01-01

Abstract

This paper presents the results of free vibration tests carried out on a near-shore steel pipe pile vibrodriven into soft marine clay. The tests were carried out by quickly releasing a free head pile from a deformed configuration obtained by applying a quasi-static horizontal loading by means of a hydraulic jack. Different tests were performed at increasing loading levels with the aim of investigating the dynamic soil-water-pile system interaction and investigating how the nonlinear dynamic behaviour develops as the applied load increases. The results of experimental modal analyses, based on the signals recorded by strain gauges applied along the pile, are presented in terms of natural frequencies and damping ratios of the soil-water-pile system and the variations with loading level, due to the nonlinear behaviour of the system, are discussed. The dynamic effects induced on two pipe piles vibrodriven near the loaded pile to form an L-shaped in plan configuration are also discussed on the basis of signals measured by accelerometers applied at the head of the receiver piles; in order to investigate the pile-to-pile dynamic interaction.
2014
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11566/225197
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus ND
  • ???jsp.display-item.citation.isi??? ND
social impact