Prestressed carbon fiber tensioning device

Abstract

The invention discloses a prestressed carbon fiber tensioning device. The device comprises a fixed end base, a fixed end anchoring block, a carbon fiber tensioning cable, a tensioning end anchoring block and a tensioning end base. The fixed end anchoring block and the tensioning end anchoring block are of cylindrical shapes and are fixed to the two ends of the tensioning cable; the tensioning endanchoring block is connected with one end of a tensioning screw, and the other end of the tensioning screw passes through a tensioning end through hole in the tensioning end base and is connected to ajack. By adopting the prestressed carbon fiber tensioning device, the area of a groove formed in concrete is small, the depth is also small, and the damage to the structural strength of the concreteof a bridge surface is smaller so as to maintain the overall structural strength of the bridge as far as possible.

Description

Technical field

[0001] The invention relates to a prestressed carbon fiber tensioning device, belonging to the technical field of bridge concrete prestressing tensioning devices. Background technique

[0002] At present, prestressed reinforced concrete structures are mostly used in bridges. The prestressed tension cables used in the reinforcement of bridge concrete structures are usually rectangular thin plates (strips or strips) with a width of 100mm, 50mm or 20mm and a thickness of 1mm to 3mm. The pre-tensioning method and the post-tensioning method are conventionally used to strengthen the method. Because the carbon fiber rectangular sheet is prone to cracking due to uneven force when applying tension, the reliability and safety of these two methods are poor when implemented, and the tension control stress can only play 40-50 of the standard value of the material. ﹪, the high-strength properties of carbon fiber have not been effectively used, and the effectiveness of structur...

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