Carbon-fiber-reinforced polymer (CFRP), is a fiber-reinforced
polymer made with carbon fibers which is very strong and light. Over the past
two decades it becomes an increasingly notable material used in structural engineering
applications. With its potential benefits in construction, it has also proved
itself cost-effective in a number of field applications strengthening concrete,
masonry, steel, cast iron, and timber structures.
Retrofitting
has become the increasingly dominant use of the material in civil engineering,
and applications include increasing the load capacity of old structures (such
as bridges) that were designed to tolerate far lower service loads than they
are experiencing today, seismic retrofitting, and repair of damaged structures.
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| Fig: A and B carbon laminate to beams and slabs. |
To protect a building from an extreme event, CFRP can be used to increase
the bending capacity of walls or columns of threatened buildings. Now an anchor is used that embeds in the column or joint to make CFRP more
effective. In that work, the anchors allow the CFRP to reach its full tension
strength rather than separating from the concrete at only about half its
strength.
CFRP, when layered and anchored, provided a significant amount of
protection. However, applying additional protection to the front of the concrete slab, such as a steel
plate, would enhance the slab's performance.
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