Reinforced concrete frame joint beam hogging moment assembled steel structure and reinforcing method thereof

Abstract

The invention discloses a reinforced concrete frame joint beam hogging moment assembled steel structure and a reinforcing method thereof. The assembled steel structure comprises a high-strength steel plate belt, angle iron and floor bottom longitudinal steel belts; a reinforced concrete frame joint comprises a frame column which is vertically arranged, a frame beam which is horizontally arranged in a manner of being perpendicular to the frame column and a floor which is perpendicular to the frame column and horizontal to the frame beam and is horizontally arranged on the frame beam; the high-strength steel plate belt is bent to be in right-angle attaching to the upper layer of the floor and the frame column, the high-strength steel plate belt is fixed to the floor and the frame column through screws, the angle iron is fixed to the internal corner of the high-strength steel plate belt, an angle iron vertical limb is fixed to the high-strength steel plate belt and the frame column through screws, the floor bottom longitudinal steel belts are symmetrically arranged on the two sides of the frame beam, and are fixedly attached to the lower layer of the floor in a manner of being close to the frame beam, the horizontal segment of the high-strength steel plate belt is fixed to the floor and the floor bottom longitudinal steel belts through bolts, and the internal corner is fixed to the angle iron horizontal limb, the floor and the floor bottom longitudinal steel belts through bolts.

Description

technical field [0001] The invention relates to the field of reinforcement and assembly structures of civil and construction engineering, in particular to a negative moment assembly steel structure of reinforced concrete frame node beams and a reinforcement method thereof. Background technique [0002] Due to the change of the building's use function, the load on the reinforced concrete frame beam will change accordingly, which may exceed the original design value, so that the safety of the frame beam does not meet the requirements of the code, especially in the negative moment area, which needs to be reinforced. Existing reinforcement methods include sticking carbon fiber (CRFP) or sticking steel plates, which use chemical glue to stick fiber layers or steel plates on the concrete surface. On the one hand, there are high requirements for the strength level and surface quality of concrete. Poor fire resistance and easy aging. Although the tensile strength of carbon fiber or...

AI Technical Summary

Problems solved by technology

[0002] Due to the change of the building's use function, the load on the reinforced concrete frame beam will change accordingly, which may exceed the original design value, so that the safety of the frame beam does not meet the requirements of the code, especially in the negative moment area, which needs to be reinforced

Existing reinforcement methods include sticking carbon fiber (CRFP) or sticking steel plates, which use chemical glue to stick fiber layers or steel plates on the concrete surface. On the one hand, there are high requirements for the strength level and surface quality of concrete. Poor fire resistance, easy aging

Although the tensile strength of carbon fiber or steel plate is much higher than that of concrete, the shear force and tensile force between the two are transmitted through the adhesive layer, and the performance of the adhesive layer depends on the concrete. Once the concrete is peeled off and cracked, carbon fiber or steel plate cannot exert its full potential. strength, loss of reinforcement

These methods have limited improvement in the resistance to the negative moment area of ​​concrete beams, are highly dependent on the technical level of on-site reinforcement construction, and have insufficient reliability.

Images