The use of paste fiber fabric reinforced beams and columns should meet the requirements?

What requirements should be met when using fiber cloth paste to reinforce beams and columns?

1 The actual concrete strength of the original structural members should not be less than C15, and the positive tensile bond strength of the concrete surface should not be less than 1.5MPa.

2 The carbon fiber should be designed to withstand only tensile stress. When improving the bending capacity of the beam, carbon fiber cloth should be located in the top or bottom surface of the beam tensile zone; when improving the shear capacity of the beam, carbon fiber cloth should be used U-shaped hoop with longitudinal compression strips or closed hoops; when improving the shear capacity of the column, the carbon fiber cloth should be pasted along the ring to the helix and closed, when a rectangular cross-section with a closed loop hoop, at least 3 turns and lap length should be more than 200mm. paste the fiber cloth outside the scope of the need to be reinforced. And for A, B reinforced concrete structure, the original component of the material strength design value and seismic capacity, should be adopted in accordance with the current national standards, "building seismic identification standards" GB 50023 of the relevant provisions.

4 The environment and fire protection requirements for the long-term use of the reinforced components should be in line with the provisions of the current national standards.

5 Paste fiber cloth reinforcement, should be unloaded or most of the live load acting on the beam, its construction should be in line with the special provisions.

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