Small span-depth ratio crossed diagonal inclined bar connecting beam

Abstract

The invention discloses a small span-depth ratio crossed diagonal inclined bar connecting beam. The connecting beam comprises longitudinal bars, stirrups arranged on the outer side of the longitudinal bars, crossed diagonal inclined bars arranged between the longitudinal bars, and high-elongation fiber concrete serving as a filling material. Compared with the common concrete diagonal inclined bar connecting beam, the connecting beam has the advantages that because the high-elongation fiber concrete serves as a base material, the shear capacity and elongation of the connecting beam are improved, and the structural deadweight is reduced; and meanwhile, the diagonal inclined bars in the connecting beam are not required to be provided with stirrups, the steel bar amount is reduced, and the construction difficulty caused by the crowded steel bars is avoided.

Description

technical field [0001] The invention relates to a connecting beam with a small span-to-height ratio, in particular to a high-ductility fiber concrete small-span-to-height ratio cross-type diagonally inclined-reinforced connecting beam. Background technique [0002] In the shear wall structure and frame-shear wall structure, the two ends are connected with the shear wall and the span-height ratio (the ratio of the net span of the connecting beam to the beam height) is less than 5, and the beam connecting the wall and the wall is called the connecting beam. beam. Under the action of wind load and earthquake load, the wall pier produces bending deformation, which makes the coupling beam produce an angle, so that the coupling beam generates internal force. At the same time, the bending moment, shear force and axial force at the end of the connecting beam in turn reduce the internal force and deformation of the wall pier, play a certain role in restraining the wall pier, and imp...

AI Technical Summary

Problems solved by technology

However, due to the configuration of intersecting concealed columns 1 and a large number of stirrups 2 on each concealed column, this type of connecting beam requires a large amount of steel and the reinforcement is crowded, which makes construction difficult

[0005] In addition, the high ductility concrete coupling beam disclosed in ZL201120109680.2 is based on the structure of ordinary frame beams, and the base material is high ductility concrete, which improves the ductility and energy dissipation capacity of the coupling beam with small span-to-height ratio to a certain extent; If the height ratio is too small (less than 1.5), its ductility no longer meets the seismic requirements of the structure, and the number of stirrups needs to be further increased

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