Application field of aramid cloth in structural reinforcement engineering

Application field of aramid cloth in structural reinforcement engineering

1. Beam: mainly for bridges and civil buildings or industrial production houses. The reinforcement methods include bending and shear resistance. When bending reinforcement is used, the fiber direction of the aramid cloth is consistent with the axial direction of the beam, generally attached to the beam. Pulling the side, has improved the bearing capacity of the beam. According to relevant tests, as long as the beam is not a super-strength beam, a layer of AK-40 can increase the load by about 30%, and the two layers can increase by about 40%; When reinforced, the fiber direction of the aramid cloth is perpendicular to the axial direction of the beam.

2. Column: Aramid cloth is an ideal column reinforcement material. Firstly, because the elastic modulus of aramid is 118Gpa, it is better in ductility than carbon fiber (230Gpa). Secondly, when it is used for edge grinding. Generally only need about 10mm, generally no need to polish, and carbon fiber needs about 30mm, aramid can save a lot of man-hours, because aramid cloth is a soft cloth, so the followability is very good, especially for irregular shape The apron cloth is an ideal reinforcement material.

3. Masonry and board: Generally, the reinforcement clearance of the board is relatively high, and the appearance of the board is not affected, so it is an ideal choice to use the thin and soft FRP composite material for reinforcement.

4. Chimneys and water towers: Due to the structure developed to the high altitude like a chimney water tower, reinforcement and maintenance are particularly difficult. Traditional methods are basically difficult to solve such problems, and aramid fibers with good quality, high corrosion resistance, corrosion resistance and durability are good. It is a good choice.

5. Metro tunnel: Since the subway and the tunnel are a structure that works underground, its force is different from the ground structure. It has the effect of earth force on the top of the cave and the hole, and it also has clearance. Requirements, so when the crack repair is carried out, the traditional reinforcement method is very unlikely. The reinforcement repair with aramid cloth can meet all aspects of it, because the crack in the arch or side wall of the subway or tunnel is generally multi-directional. And irregular, which requires its repair material to have good shear resistance, and aramid is also a non-conductive FRP material, so aramid cloth is a better choice in tunnel subway engineering. .