Free vibration analysis of multi-span orthotropic bridge deck with rubber bearings
Farah Imed 1  
,   Abdelouahab Rezaiguia 1  
,   Mouassa Ahcene 2  
,   Laefer Debra F. 3  
,   Guenfoud Salah 1  
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Applied Mechanics of New Materials Laboratory, University of 8 Mai 1945 Guelma, P.O.B 401, Guelma 24000, Algeria
Mechanic and Structures Laboratory, University of 8 May 1945-Guelma, Algeria
Center for Urban Science and Progress and Department of Civil Engineering, Tandon School of Engineering, New York University, United States of America
Abdelouahab Rezaiguia   

Applied Mechanics of New Materials Laboratory, University of 8 Mai 1945 Guelma, P.O.B 401, Guelma 24000, Algeria
Submission date: 2020-04-30
Final revision date: 2020-11-18
Acceptance date: 2021-01-05
Online publication date: 2021-01-08
Publication date: 2021-03-04
Diagnostyka 2021;22(1):11–21
In this paper, a semi-analytical approach is proposed for free vibration analysis of a multi-span, orthotropic bridge deck with rubber bearings. This allows more realistic modeling of vibration transmission from a bridge’s deck to its supports. The approach is based on modal superposition incorporating intermodal coupling. The bridge deck was modeled as a continuous, multi-span, orthotropic rectangular plate with equivalent rigidities. The rubber bearings were inserted between the girders and rigid supports to absorb traffic-induced vibrations. The rubber bearing was modeled by linear elastic, vertical supports as very flexible in rotation and highly rigid in the vertical direction. The method’s efficacy was validated against two numerical examples. The absolute error was less than 10%.
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