The Effectiveness of a Retrofit Method for Cantilever Slabs Using Reinforced Concrete Beams

A new retrofit method was developed, geared mainly for cantilever rigid-frame viaducts, which involves the installation of RC beams in each of the viaduct's columns to improve cantilever performance against strong wind loads, generated by noise prevention barriers which are higher than before....

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Bibliographic Details
Published inQuarterly Report of RTRI Vol. 57; no. 3; pp. 191 - 198
Main Authors NIHEI, Tatsuya, KITO, Naoki, OKAMOTO, Masaru
Format Journal Article
LanguageEnglish
Published Tokyo Railway Technical Research Institute 2016
Japan Science and Technology Agency
Subjects
Bend strength
Cantilever beams
Cantilever members
cantilever slab
Columns (structural)
Concrete slabs
Effectiveness
Reinforced concrete
renewal
retrofit
Retrofitting
Viaducts
wind load
Wind loads
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Summary:A new retrofit method was developed, geared mainly for cantilever rigid-frame viaducts, which involves the installation of RC beams in each of the viaduct's columns to improve cantilever performance against strong wind loads, generated by noise prevention barriers which are higher than before. This paper describes the experiments and FEM analyses conducted to evaluate the effectiveness of this method. Firstly, confirmation was obtained that this method can be used on cantilever viaducts to increase resistance. Secondly verifications were made to ensure that that this method allows cantilevers to support barriers of about 5 m. Finally, a method was proposed which can be used to calculated the allowable bending strength using this method.
ISSN:0033-9008
1880-1765
DOI:10.2219/rtriqr.57.3_191