An analytical technique for the seismic response assessment of slender bridge piers

E. Tubaldi, L. Tassotti, A. Dall'Asta, L. Dezi

Research output: Contribution to conferencePaper

1 Citation (Scopus)

Abstract

This work proposes an analytical technique for the analysis of the effects of axial loads on the dynamic behaviour and seismic response of tall and slender bridge piers. The pier is modeled as a linear elastic Euler-Bernoulli cantilever beam with uniformly distributed mass, representing the pier mass, and a tip mass at the free end, representing the deck mass. The beam is subjected to the reaction due to deck loads, and to the pier self weight. The seismic problem is described by a linear partial differential equation of seismic motion with variable coefficients. This equation is decoupled by using the exact vibration modes which are obtained by applying the Frobenius method. By this way, the seismic response can be evaluated in terms of superposition of modal contributions. The proposed formulation is applied to the seismic analysis of a realistic slender bridge pier. The results of the study permit to shed light on the effect of axial load on the various vibration modes that contribute to the seismic response and to evaluate the suitability of amplification factors commonly used by seismic codes to account for axial load effects.
Original languageEnglish
Pages4079-4094
Number of pages16
Publication statusPublished - 14 Jun 2013
Event4th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering - Kos, Greece
Duration: 12 Jun 201313 Jun 2013
Conference number: 4

Conference

Conference4th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering
Abbreviated titleCOMPDYN 2013
CountryGreece
CityKos
Period12/06/1313/06/13

Keywords

  • analytical models
  • axial loads
  • bridge piers
  • civil engineering
  • computational methods
  • engineering geology
  • partial differential equations
  • structural dynamics
  • dynamic behaviours
  • earthquake engineering
  • linear partial differential equations
  • load effects
  • seismic problems
  • variable coefficients
  • vibration
  • amplification factors
  • seismic response

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  • Cite this

    Tubaldi, E., Tassotti, L., Dall'Asta, A., & Dezi, L. (2013). An analytical technique for the seismic response assessment of slender bridge piers. 4079-4094. Paper presented at 4th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering, Kos, Greece.