Fluid viscous damper optimal design for seismic protection of bridges

S. Berton, T. Takahashi, Yoshimi Sonoda

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In bridge structures during strong earthquakes impact as well as intermediate joint unseating can occur when the induced deformations exceed the joint gaps or the joint seat lengths, respectively. Passive dissipation devices such as fluid viscous dampers (FVDs) have been recently used for seismic protection of bridges. These devices are usually installed at the expansion joint or abutment locations and activated by the relative movements of the structural components induced by earthquakes. In this paper the benefits of using FVDs to prevent seismic induced damage in bridges is investigated through a series of finite element time history analyses. The example model used in this study represents a reinforced/prestressed concrete box-girder bridge having five spans and only one expansion joint at one of the infiection points of the intermediate span. The effect of the nonlinear FVDs is taken into account by using a modified Maxwell type element that connects the two independent frames at the structural joint. From the numerical simulation results, an optimal damper degree of non-linearity and damper size are selected so that the structural response is optimized. Analysis results confirm that FVDs can be effective in improving the overall dynamic behavior of bridge structures and emphasize the better performance of nonlinear devices. Additional benefits include significant reductions in base-shear forces and longitudinal pier moments.

Original languageEnglish
Title of host publicationProceedings of the 10th International Conference on Civil, Structural and Environmental Engineering Computing, Civil-Comp 2005
Publication statusPublished - Dec 1 2005
Event10th International Conference on Civil, Structural and Environmental Engineering Computing, Civil-Comp 2005 - Rome, Italy
Duration: Aug 30 2005Sep 2 2005

Other

Other10th International Conference on Civil, Structural and Environmental Engineering Computing, Civil-Comp 2005
CountryItaly
CityRome
Period8/30/059/2/05

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All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Building and Construction
  • Environmental Engineering

Cite this

Berton, S., Takahashi, T., & Sonoda, Y. (2005). Fluid viscous damper optimal design for seismic protection of bridges. In Proceedings of the 10th International Conference on Civil, Structural and Environmental Engineering Computing, Civil-Comp 2005