Steel-concrete one-way combined beam column joint

Abstract

The invention discloses a steel-concrete one-way combined beam column joint which comprises a steel column, an H-shaped steel beam, a concrete board and a one-way anti-shear connecting part. An anti-shear buffer cushion is arranged in a contact position of the concrete board and the steel column, the height of the anti-shear buffer cushion is equal to the thickness of the concrete board, the one-way anti-shear connecting part comprises a stud welded to the top of an upper flange plate on the H-shaped steel beam and the one-way anti-shear buffer cushion with the stud facing the steel column, the one-way anti-shear buffer cushion is arranged on the stud body, and the height of the stud is smaller than the thickness of the concrete board. The steel-concrete one-way combined beam column jointdisclosed by the invention is novel in design. By arranging the one-way anti-shear connecting part on the upper flange plate on the H-shaped steel beam, the combination effect during a sagging momenteffect is strengthened, so that the centroidal axis of a combined section during the sagging moment effect moves downward, and therefore, the tensile stress of the welding part of a lower flange of the H-shaped steel beam is reduced, and destroy is avoided. Meanwhile, the uplift-preventing performance of the one-way anti-shear connecting par and the combination effect during a hogging moment effect are also guaranteed. The steel-concrete one-way combined beam column joint is simple in structure and simple and convenient in construction method.

Description

technical field [0001] The invention belongs to the technical field of building structures, and in particular relates to a steel-concrete one-way composite beam-column joint. Background technique [0002] Steel-concrete composite beams can be divided into outsourcing concrete composite beams and T-shaped composite beams according to the cross-sectional form. The steel beams of T-shaped composite beams are exposed, and the steel beams and concrete flanges are combined by shear connectors. The T-shaped steel-concrete composite beam section is generally composed of three parts: steel beam, concrete wing plate and shear connector. Among them, the shear connector is the basis for the joint work of the steel beam and the concrete wing plate, which is mainly used to bear the longitudinal shear force between the reinforced concrete wing plate and the steel beam contact surface, and resist the relative slip between the two; in addition , it also has the function of resisting the lif...

AI Technical Summary

Problems solved by technology

[0003] However, under the action of positive moment load, the concrete slab of this type of composite beam is under compression, while most of the steel beam is under tension. Although the advantages of the two materials of concrete and steel can be brought into play, the concrete wing plate can also be used for steel beams. It plays a very good lateral restraint effect and avoids the lateral torsional instability of the steel beam, but this makes the tensile stress of the lower flange of the steel beam too large when the positive bending moment acts. The welding part of the lower flange of the beam is often cracked and damaged, which reduces the deformation capacity of the composite beam and affects the seismic performance of the structure

To sum up, due to the combination effect, the centroid axis of the T-shaped steel-concrete composite beam section moves upward. When the positive bending moment acts, the weld of the lower flange of the H-shaped steel beam is damaged due to excessive tensile stress, and if If the stud connector is not used, the steel beam and the concrete will not have a combined effect. Although the above problems can be improved, the problem of vertical pull-out resistance of the concrete slab appears.

Images