Carbon Fiber Reinforced Polymer
Carbon Fiber Reinforced Polymer
(OP)
What is your experience with Carbon Fiber Reinforced Polymer in retrofitting columns for more seismic resistance? What are its pros and cons as far as your personal experience and research with them is concerned? Can it help more in the axial load capacity rather than bending moment capacity and are there bad brands of CFRP or all of them similar?






RE: Carbon Fiber Reinforced Polymer
RE: Carbon Fiber Reinforced Polymer
I saw a sample of CFRP, it's just like cloth, the supplier said it only works when the main columns spalls or buckles or the concrete crushes. So I guess it is not for normal column that doesn't have any problem? Does anyone actually put this in perfect column just to survive extreme seismic load?
RE: Carbon Fiber Reinforced Polymer
1- The material is not considered a "non-combustible" and when using it in a building with the requirement for non-combustible construction, you could have a battle with the city officials even when spraying over it with the fire resistive material,
2- Need to do strain compatibility analysis. Note, some matrices, ( fibre with cured epoxy), have lower than steel modulus of elasticity,
3- Tension straps need to be anchored properly against delamination,
4- Surface of concrete needs to be tested for bond and it has to meet the minimum required bonding stress,
5-The reinforcing needs to meet the required bonding stress,
6- Carbon fiber reinforcing is not a ductile material and therefore you probably can't meet some of the code's required ductility,
7- suppliers have their own engineers who can help in the design.
RE: Carbon Fiber Reinforced Polymer
Cheers
M