If a beam is damaged, corroded or cracked, how could be reinforced ?
I do not think internal reinforcement is possible in a damaged, corroded or cracked beam. Only external reinforcement can be done after repair of the damaged beam.
Yes, I guess it's not as concrete, but is adding elements to the damaged beam the only way we have to solve the problem ?
Hi,
I propose you to have a look to this recent article concerning a bridge.
Several available methods were tested.
https://www.researchgate.net/publication/264811873_RENFORCEMENT_ET_REMISE_EN_PEINTURE_DES_PONTS_DU_DANCOURT
wWith kind regards.
Article RENFORCEMENT ET REMISE EN PEINTURE DES PONTS DU DANCOURT
If you mean to upgrade the beam by strengthening it, there some ways such as using FRP materials as external applying or near surface methos(NSM).
In addition to near surface mounted FRP some other methods are also possible, e.g.
- additional steel-reinforced shotcrete-layer with bond anchors or
- textile reinforced concrete
see articles attached
Article New Repair Techniques for Concrete Structures
Article WET-MIXED SHOTCRETE WALLS TO RETROFIT LOW DUCTILE RC FRAMES
Hello Aicha
we did such a work in some projects.
if the steel is corroded, you can strengthen it by welding steel sheet "dimension and thickness of steel sheet should be calculated carefully".
I have reinforced many steel structural elements over the years. Most of that reinforcing was done by welding structural shapes (usually plates) to the parent (damaged) element. Structural steel shapes can be reinforced under load or unloaded. There are some considerations that need to be added for loaded structures. I have also bolted on plates to reinforce steel beams. A cracked structural steel shape may be a different issue. You can research Ray Tide to find a lot of articles on reinforcing structural steel. I would suggest you obtain the AISC Design Guide 15 AISC Rehabilitation and Retrofit Guide as a starting point. Chapters 3 and 4 would be good for you. You will also find great references in Chapter 5.
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