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.

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

Fingerprint

Bearings (structural)
Piers
Dynamic response
Dynamical systems

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

Cite this

Tubaldi, E., & Dall'asta, A. (2011). Free vibration problem of prsi bridges: analytical solution and parametric analysis. Paper presented at 3rd International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering, Corfu, Greece.
Tubaldi, E. ; Dall'asta, A. / Free vibration problem of prsi bridges : analytical solution and parametric analysis. Paper presented at 3rd International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering, Corfu, Greece.20 p.
@conference{9f7035da3d54473981f1470a5768dab2,
title = "Free vibration problem of prsi bridges: analytical solution and parametric analysis",
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.",
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",
author = "E. Tubaldi and A. Dall'asta",
note = "cited By 0; 3rd International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering, COMPDYN 2011 ; Conference date: 25-05-2011 Through 28-05-2011",
year = "2011",
language = "English",
url = "http://eccomas.cimne.com/cvdata/cntr1/spc14/dtos/img/mdia/COMPDYN-2011-Brochure.pdf",

}

Tubaldi, E & Dall'asta, A 2011, 'Free vibration problem of prsi bridges: analytical solution and parametric analysis' Paper presented at 3rd International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering, Corfu, Greece, 25/05/11 - 28/05/11, .

Free vibration problem of prsi bridges : analytical solution and parametric analysis. / Tubaldi, E.; Dall'asta, A.

2011. Paper presented at 3rd International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering, Corfu, Greece.

Research output: Contribution to conferencePaper

TY - CONF

T1 - Free vibration problem of prsi bridges

T2 - analytical solution and parametric analysis

AU - Tubaldi, E.

AU - Dall'asta, A.

N1 - cited By 0

PY - 2011

Y1 - 2011

N2 - 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.

AB - 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.

KW - analytical solutions

KW - dynamic behaviors

KW - free vibration

KW - free vibration problem

KW - isolation bearings

KW - mlti-spans

KW - non-classical damping

KW - parametric analysis

KW - partial restraint

KW - preliminary assessment

KW - problem parameters

KW - seismic isolation

KW - simply supported beam model

KW - transverse dynamics

KW - transverse motions

KW - visco-elastic

KW - civil engineering

KW - computational methods

KW - dynamic response

KW - earthquakes

KW - engineering geology

KW - structural dynamics

KW - bearings (structural)

KW - vibration analysis

UR - https://www.scopus.com/inward/record.uri?eid=2-s2.0-80054803936&partnerID=40&md5=35bb365d7b0ad72871aeb3f105b7d72e

M3 - Paper

ER -

Tubaldi E, Dall'asta A. Free vibration problem of prsi bridges: analytical solution and parametric analysis. 2011. Paper presented at 3rd International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering, Corfu, Greece.