Free vibration problem of prsi bridges: analytical solution and parametric analysis

E. Tubaldi, A. Dall'asta

Research output: Contribution to conferencePaper

Abstract

This paper analyzes the dynamic behavior of partially restrained seismically isolated (PRSI) bridges. These are a particular class of multi-span seismically isolated bridges in which isolation bearings are posed only at the top of the piers, while seismic stoppers restrain the transverse motion of the superstructure at the abutments. The transverse dynamic behavior of these partially-restrained bridges is described analytically by considering a two-dimensional simply supported beam model, with intermediate visco-elastic restraints whose properties are calibrated to describe the substructures' behavior. Particular simplified configurations are considered which allow to identify a minimal set of characteristic problem parameters that completely describe the dynamic response. The properties of the dynamic systems are analyzed by considering separately the undamped and the damped case. The results of the study contribute to improve the understanding of the dynamic behavior of partially restrained seismically isolated bridges and allow to draw some conclusions useful for their preliminary assessment and design.
Original languageEnglish
Number of pages20
Publication statusPublished - 2011
Event3rd International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering - Corfu, Greece
Duration: 25 May 201128 May 2011
Conference number: 3
http://eccomas.cimne.com/cvdata/cntr1/spc14/dtos/img/mdia/COMPDYN-2011-Brochure.pdf

Conference

Conference3rd International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering
Abbreviated titleCOMPDYN 2011
CountryGreece
CityCorfu
Period25/05/1128/05/11
Internet address

Keywords

  • analytical solutions
  • dynamic behaviors
  • free vibration
  • free vibration problem
  • isolation bearings
  • mlti-spans
  • non-classical damping
  • parametric analysis
  • partial restraint
  • preliminary assessment
  • problem parameters
  • seismic isolation
  • simply supported beam model
  • transverse dynamics
  • transverse motions
  • visco-elastic
  • civil engineering
  • computational methods
  • dynamic response
  • earthquakes
  • engineering geology
  • structural dynamics
  • bearings (structural)
  • vibration analysis

Fingerprint Dive into the research topics of 'Free vibration problem of prsi bridges: analytical solution and parametric analysis'. Together they form a unique fingerprint.

Cite this