Retrofitting the weakened section of beam-column

1. Description of concrete defects:

The five column of the original residential area in the beam column node area is smaller than 60mm because of the smaller beam section, cause the column section to be small 60mm, as shown in the figure

2.Repair measures

Carbon fiber fabric and structural adhesive are used to reinforce the components. CFRP has high tensile strength and good durability. It can improve the ductility of columns, improve the bending resistance of beams and plates, and enhance the shear capacity of beams and columns.

• 1 layers of steel wire netting with anchors on the surface of a beam defect

• Filling the defect of beam with C25 concrete

• surface treatment

• Primer

• Leveling

• Applying carbon fiber adhesive

• Pasting carbon fiber fabric

• Brush protection

The node approach is shown in the detailed diagram