Preliminary Investigation on Steel Jacketing Retrofitting of Concrete Bridges Half-Joints

An innovative strengthening system for dapped-end beams is studied numerically and experimentally in this paper. The system is developed for the half-joint regions of bridge beams also commonly called “gerber saddles”, but it can be adapted to different scenarios. The strengthening system consists o...

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Bibliographic Details
Published in:Applied sciences 2023-07, Vol.13 (14), p.8181
Main Authors: Bertagnoli, Gabriele, Ferrara, Mario, Giordano, Luca, Malavisi, Marzia
Format: Article
Language:English
Subjects:
beams
Bibliographic literature
Bridge construction
Bridges
Composite materials
Concrete
dapped-end beams
Design
half-joints
Highway construction
Investigations
Simulation methods
strengthening
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Summary:An innovative strengthening system for dapped-end beams is studied numerically and experimentally in this paper. The system is developed for the half-joint regions of bridge beams also commonly called “gerber saddles”, but it can be adapted to different scenarios. The strengthening system consists of two steel plates that are clamped on both sides of the webs of the beams by means of bolts. The purpose of the system is to transfer the highest possible amount of shear from the concrete webs to the steel plate elements reducing the resistance demand of the concrete half joint. Shear is transferred by friction from concrete to steel plates. The system is designed to be applied on existing bridges without heavy work interesting the carriageway, therefore reducing the interference with the traffic. Some interesting considerations emerge from the study, including the influence of the flange web connection on the structural behavior and the possible presence of brittle failure mechanisms that are difficult to model numerically using f.e.m. simulations.
ISSN:2076-3417
2076-3417
DOI:10.3390/app13148181