CUED Publications database

An upper-bound plastic approach to the capacity of reinforced concrete slab-on-beam structures strengthened in shear with externally bonded CFRP

Foster, RM and Morley, CT and Lees, J (2017) An upper-bound plastic approach to the capacity of reinforced concrete slab-on-beam structures strengthened in shear with externally bonded CFRP. In: UNSPECIFIED pp. 126-131..

Full text not available from this repository.

Abstract

Externally bonded FRP fabrics are commonly used in a range of applications for the strengthening of existing concrete structures. In many shear strengthening applications the presence of a slab allows only partial 'U' wrapping of the down stand beam. It has been widely observed that existing design methods do not provide a good prediction of the actual strengthening effect in such cases. In some experimental situations it has further been noted that beams 'strengthened' with externally bonded CFRP fabric have failed at lower shear loads than nominally identical unstrengthened control beams. Such results are difficult to explain in terms of the models that underpin most existing design guidance. Recent work by the authors has shown that an upper bound plastic analysis provides a useful insight into these counterintuitive results and points to an alternative way of thinking about the behaviour of slab-on-beam structures strengthened with externally bonded U-wrapped CFRP. This paper explains this thinking and proposes a new, rational limit on the enhancement that can be expected from externally bonded U-wrapped CFRP. The upper bound plastic analysis and the proposed limit on enhancement are discussed with respect to the implications for the design of externally bonded CFRP strengthening.

Item Type: Conference or Workshop Item (UNSPECIFIED)
Subjects: UNSPECIFIED
Divisions: Div D > Structures
Depositing User: Cron Job
Date Deposited: 15 May 2018 01:36
Last Modified: 18 Feb 2021 18:58
DOI: