Asymmetric vibration of finger-type bridge expansion joint for design consideration

Goangseup Zi, Xingji Zhu

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)


An asymmetric vibration is proposed for the design consideration of finger-type bridge joints. It is shown, both experimentally and numerically, that the vibration of the joint-plate is not symmetric, but asymmetric; and that the end moment of finger-type bridge joints becomes maximum when the joint plate springs upward, after the load moves out from the joint, in which the tension of the anchor bolts due to this upturned vibration is much greater than the static load case with the load at the tip of the joint-plate. A simplified design formula is developed based on an energy concept, to consider this new failure mode in the design procedure. It is shown that the actual maximum moment and tension can be closely estimated by a simple formula.

Original languageEnglish
Pages (from-to)53-62
Number of pages10
JournalEngineering Structures
Publication statusPublished - 2014 Jul 1

Bibliographical note

Funding Information:
This work was supported by Korea Institute of Energy Technology Evaluation and Planning (KETEP) (Grant No. R1400331 ) and the project titled as “Development of design basis and concrete technologies for offshore wind turbine support structures/20120093” funded by Ministry of Oceans and Fisheries, Korea .


  • Asymmetric vibration
  • Design formula
  • Dynamic amplification factor
  • Energy conservation
  • Finger joints

ASJC Scopus subject areas

  • Civil and Structural Engineering


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