Connecting joint for buckling-restrained brace and concrete frame beam

Abstract

The invention discloses a connecting joint for a buckling-restrained brace and a concrete frame beam; an anchoring part is formed by integrally welding one group of spaced H-shaped profile steels and upper and lower anchoring plates; a joint plate is integrally welded with the lower anchoring plate; two ends of the lower anchoring plate are lengthened to be longer than the lateral side of the joint plate; and bolt holes for fixed connection of a buckling-restrained brace are formed at two sides of the joint plate. The joint has the advantages: the H-shaped profile steels have good stability in a vertical plane and are high in rigidness and not easy in unstability; the profile steels have big welded areas with the anchoring plates and are not easy to produce pulling / pushing damage; the profile steels have big contact and load-transfer areas with the concrete and are capable of uniformly dispersing the load to the concrete beam; the lengthened parts at two ends of the lower anchoring plate are capable of effectively avoiding direct extrusion between the joint plate and the concrete, so that the stress concentration is relieved and the service life of the joint is prolonged; a clearance is formed between two profile steels, the integrality of the concrete beam is not influenced, the arrangement of hoops and longitudinal ribs in the concrete beam is not influenced and the construction is convenient; the steel ratio in the joint area of the concrete beam is increased and the strength and rigidness of the joint is improved by the plastic deformation of the beam restrained by the upper and lower anchoring plates; the whole component can be manufactured in a factory and the construction time is saved.

Description

technical field [0001] The invention relates to a building structure, in particular to a buckling-constrained support and a concrete frame beam connecting node. Background technique [0002] Concrete frame structures with buckling-restrained braces are being popularized and applied in the field of construction due to their advantages in seismic performance, simple construction, and saving raw materials. Among them, the connection node between the buckling restraint support and the concrete frame is a very important link in the whole structure, which requires sufficient strength, appropriate stiffness, and sufficient rotation capacity to transmit shear force and bending moment reasonably; at the same time, it should be easy to manufacture and convenient construction. A good node should conform to the design principle of "strong node, weak component". [0003] The existing buckling-restrained braces and concrete frame beam connection nodes are as follows: [0004] One is a ...

AI Technical Summary

Problems solved by technology

The disadvantage of this kind of joint is: the whole steel plate cuts the concrete beam in half, which weakens the integrity of the concrete beam and reduces its strength; The concrete beam is split; when the stirrups of the concrete beam are tied, the steel plate becomes an obstacle, and the construction is inconvenient

The disadvantages of this kind of joint are: the symmetry and stability of the angle steel are poor; the welding area between the angle steel and the anchor plate is small, and it is easy to produce drawing damage during the stress process; the contact force transmission area between the angle steel and concrete is small, and the joint strength is poor

The disadvantages of this kind of joint are: the stability of the anchor bar in the vertical plane is poor; the welding area between the anchor bar and the anchor plate is small, and it is easy to produce pullout damage during the stress process; the contact force transfer area between the anchor bar and the concrete is small, poor node strength

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