Structural Monitoring and Maintenance

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Assessment of masonry arch bridges retrofitted by sprayed concrete under in-plane cyclic loading

  • Mahdi Yazdani (Department of Civil Engineering, Faculty of Engineering, Arak University) ;
  • Mehrdad Zirakbash (Faculty of Civil Engineering and Transportation, University of Isfahan)
  • Received : 2023.12.26
  • Accepted : 2024.03.20
  • Published : 2024.03.25
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Abstract

Masonry arch bridges as a vital infrastructure were not designed for seismic loads. Given that masonry arch bridges are made up of various components, their contribution under the seismic actions can be very undetermined and each of these structural components can play a different role in energy dissipation. Iran is known as a high-risk area in terms of seismic excitations and according to the seismic hazard zoning classification of Iran, most of these railway infrastructures are placed in the high and very high seismicity zones or constructed near the major faults. Besides, these ageing structures are deteriorated and thus in recent years, some of these bridges using various retrofitting approaches, including sprayed concrete technique are strengthened. Therefore, investigating the behavior of these restored structures with new characteristics is very significant. The aim of this study is to investigate the cyclic in-plane performance of masonry arch bridges retrofitted by sprayed concrete technique through the finite element simulation. So, by considering the fill-arch interaction, the nonlinear behavior of a bridge has been investigated. Finally, by extracting the hysteresis and enveloping curves of the retrofitted and non-retrofitted bridge, the effect of strengthening on energy absorption and degradation of material has been investigated.

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References

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