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Strengthening of RC Bridges

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Book cover Strengthening and Retrofitting of Existing Structures

Part of the book series: Building Pathology and Rehabilitation ((BUILDING,volume 9))

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Abstract

During past seismic events several cases of concrete bridges with poor structural behaviour and severe damage were reported. In this chapter, common damage patterns in RC bridges are illustrated, with reference to several previous studies about the seismic performance of bridge components. The focus of the chapter is on pier behaviour, wherein damage is usually more significant and quite often there is a need to retrofit these elements. In this context, the main objective of this chapter is to present the most common retrofitting strategies for RC bridges and the resulting benefits to their structural behaviour. Several types of piers are considered, where the cross section ranges from solid to hollow and from circular to rectangular. One of the most common retrofit measures for RC bridge piers is the full or partial jacket, which can be made in FRP, steel or RC. Experimental and numerical tests were carried out to assess the benefits to bridge pier behaviour, resulting from shear strengthening of piers with hollow cross section. Moreover, analytical studies are presented on the performance of bridges retrofitted using different techniques, aiming at strengthening and/or confinement, and a method for assessing the seismic fragility of retrofitted bridges is described, along with an application to a bridge with circular piers.

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Acknowledgements

Part of this work reports to research financially supported by Project POCI-01-0145-FEDER-007457—CONSTRUCT—Institute of R&D in Structures and Construction, funded by FEDER funds through COMPETE2020—Programa Operacional Competitividade e Internacionalização (POCI) and by national funds through Fundação para a Ciência e a Tecnologia (FCT).

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Authors and Affiliations

  1. Department of Civil Engineering, School of Technology and Management, Polytechnic Institute of Viana do Castelo, Apartado 574, 4901-908, Viana do Castelo, Portugal

    Pedro Delgado

  2. CONSTRUCT-LESE, Faculty of Engineering (FEUP), University of Porto, 4200-465, Porto, Portugal

    Pedro Delgado

  3. Research Centre for Civil Engineering Structures, City University of London, Northampton Square, London, EC1V 0HB, UK

    Andreas Kappos

Authors
  1. Pedro Delgado
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  2. Andreas Kappos
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Correspondence to Pedro Delgado .

Editor information

Editors and Affiliations

  1. Department of Civil Engineering, RISCO, University of Aveiro, Aveiro, Portugal

    Aníbal Costa

  2. CONSTRUCT-LESE, Faculdade de Engenharia, Universidade do Porto, Porto, Portugal

    António Arêde

  3. CONSTRUCT-LESE, Faculdade de Engenharia, Universidade do Porto, Porto, Portugal

    Humberto Varum

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Delgado, P., Kappos, A. (2018). Strengthening of RC Bridges. In: Costa, A., Arêde, A., Varum, H. (eds) Strengthening and Retrofitting of Existing Structures. Building Pathology and Rehabilitation, vol 9. Springer, Singapore. https://doi.org/10.1007/978-981-10-5858-5_9

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  • DOI: https://doi.org/10.1007/978-981-10-5858-5_9

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  • Publisher Name: Springer, Singapore

  • Print ISBN: 978-981-10-5857-8

  • Online ISBN: 978-981-10-5858-5

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