Earthquakes and Structures

  • 제1권1호
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  • Pages.21-41
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  • 2010
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  • 2092-7614(pISSN)
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  • 2092-7622(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Transverse seismic response of continuous steel-concrete composite bridges exhibiting dual load path

  • Tubaldi, E. (DACS, Dipartimento di Architettura Costruzione e Strutture, Universita Politecnica delle Marche) ;
  • Barbato, M. (Department of Civil & Environmental Engineering, Louisiana State University and A&M College) ;
  • Dall'Asta, A. (Dipartimento di Progettazione e Costruzione dell'Ambiente, University of Camerino)
  • 투고 : 2009.12.01
  • 심사 : 2010.02.08
  • 발행 : 2010.03.25
⟨ 이전 논문 다음 논문 ⟩

초록

Multi-span steel-concrete composite (SCC) bridges are very sensitive to earthquake loading. Extensive damage may occur not only in the substructures (piers), which are expected to yield, but also in the other components (e.g., deck, abutments) involved in carrying the seismic loads. Current seismic codes allow the design of regular bridges by means of linear elastic analysis based on inelastic design spectra. In bridges with superstructure transverse motion restrained at the abutments, a dual load path behavior is observed. The sequential yielding of the piers can lead to a substantial change in the stiffness distribution. Thus, force distributions and displacement demand can significantly differ from linear elastic analysis predictions. The objectives of this study are assessing the influence of piers-deck stiffness ratio and of soil-structure interaction effects on the seismic behavior of continuous SCC bridges with dual load path, and evaluating the suitability of linear elastic analysis in predicting the actual seismic behavior of these bridges. Parametric analysis results are presented and discussed for a common bridge typology. The response dependence on the parameters is studied by nonlinear multi-record incremental dynamic analysis (IDA). Comparisons are made with linear time history analysis results. The results presented suggest that simplified linear elastic analysis based on inelastic design spectra could produce very inaccurate estimates of the structural behavior of SCC bridges with dual load path.

키워드

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  4. Influence of Model Parameter Uncertainty on Seismic Transverse Response and Vulnerability of Steel–Concrete Composite Bridges with Dual Load Path vol.138, pp.3, 2012, https://doi.org/10.1061/(ASCE)ST.1943-541X.0000456
  5. Transverse free vibrations of continuous bridges with abutment restraint vol.41, pp.9, 2012, https://doi.org/10.1002/eqe.1190
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