CONTRIBUTION TO THE STUDY OF THE VIBRATORY DRIVING OF SHEET PILES - STUDY OF THE ROLE OF INTERNAL DAMPING IN A HIGH FREQUENCY EXCITATION/BAR SYSTEM

CONTRIBUTION A L'ETUDE DU VIBRO-FONCAGE DES PALPLANCHES- ETUDE DU ROLE DE L'AMORTISSEMENT INTERNE DANS UN SYSTEME EXCITATEUR A HAUTE FREQUENCE-BARRE

Driving is all the more effective as the amplitudes of deformations of the pile are large. If the internal damping of the material forming the sheet pile is not taken into account, all natural frequencies of the excitation/pile system appear suitable, which is not verified experimentally. The author studied the influence of damping on the amplitudes of deformation of the pile as a function of excitation frequency. This article presents the analytical solution to this problem. Measurements made on a real system show good agreement between theoretical and experimental results. While in general it is accepted that the influence of damping increases with frequency, the numerical application performed shows that it is the third natural frequency (2717 hz) which is the least sensitive to damping. The theory outlined above is only a step forward allowing for a more rational study of vibratory driving, in particular theeproblem of lateral friction. (TRRL)

• Corporate Authors:

  Laboratoire Central des Ponts et Chausees (LCPC)

  Boulevard Lefebvre 58
  Paris Cedex 15,   France  F-75732
• Authors:
  • Sieffert, J G
• Publication Date: 1978-5-6

Language

• French

Media Info

• Features: Figures; References;
• Pagination: p. 5-12
• Serial:
  • Bulletin de Liaison des Lab des Ponts et Chaussees
  • Issue Number: 95
  • Publisher: Laboratoire Central des Ponts et Chausees (LCPC)

Subject/Index Terms

• TRT Terms: Amplitude (Physics); Bars (Building materials); Damping (Engineering); Damping (Physics); Deformation; Excitation; Frequency (Electromagnetism); Friction; High frequency; Natural frequency; Pile driving; Sheet pile walls; Sheet piling; Support piles; Vibratory equipment
• Uncontrolled Terms: Inside; Lateral loads
• Old TRIS Terms: Internal damping; Vibrating equipment
• ITRD Terms: 6988: Amplitude; 5559: Damping; 5595: Deformation; 6997: Frequency; 5452: Friction; 9033: Inside; 5549: Natural frequency; 3399: Pile; 3369: Sheet pile wall; 3630: Vibratory driving
• Subject Areas: Geotechnology; Highways;

Filing Info

• Accession Number: 00315233
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Files: ITRD, TRIS
• Created Date: Feb 6 1981 12:00AM