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A model for the anchorage of corroded reinforcement: Validation and application
Chalmers University of Technology, Sweden.
RISE, SP – Sveriges Tekniska Forskningsinstitut, CBI Betonginstitutet AB. Chalmers University of Technology, Sweden.ORCID iD: 0000-0003-4565-5345
Ramböll Sverige AB, Sweden.
2015 (English)In: Concrete - Innovation and Design: fib Symposium Proceedings, Technical University of Denmark , 2015, p. 135-136Conference paper, Published paper (Refereed)
Abstract [en]

When reinforcement in concrete corrodes, splitting stresses around corroded bars may lead to cover cracking and even cover spalling, affecting the anchorage. The aim of this study was to validate an existing one-dimensional (1D) analysis for anchorage capacity, and to show how it can be applied in assessment of existing bridges. The 1D analysis was validated through comparisons to experiments and detailed 30 finite element analyses. The methodology is exemplified in assessment of two bridges built in the 1960s. The bridges exhibit systematic damage in the form of spalled concrete on the bottom side of the main beams at cast joints where large amounts of reinforcement are spliced. The anchorage length needed to anchor the yield force was calculated from the bond-slip response, using the one-dimensional bond-slip differential equation. The model proved to be easy to use in practical design work. Furthermore, the bridges could be shown to have sufficient capacity, and costly strengthening could be avoided. This work clearly demonstrates the potential to certify sufficient load-carrying capacity of corroded reinforced concrete structures through improved models.

Place, publisher, year, edition, pages
Technical University of Denmark , 2015. p. 135-136
Keywords [en]
Anchorage, Assessment, Bond-slip, Concrete, Corrosion, Reinforcement, Anchorages (foundations), Concretes, Differential equations, Finite element method, Reinforced concrete, Anchorage lengths, Bond slips, Corroded reinforcement, Cover cracking, Existing bridge, Large amounts, Splitting stress, Concrete reinforcements
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-42347Scopus ID: 2-s2.0-85015457645OAI: oai:DiVA.org:ri-42347DiVA, id: diva2:1384101
Conference
2015 fib Symposium: Concrete - Innovation and Design, 18 May 2015 through 20 May 2015
Available from: 2020-01-09 Created: 2020-01-09 Last updated: 2020-01-09Bibliographically approved

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Zandi, Kamyab

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