Steel structure progressive collapse-resistant beam column connecting joint

Abstract

The utility model discloses an anti-progressive-collapse beam-column connecting joint of a steel structure, and belongs to the field of steel structures. The device comprises an H-shaped steel beam and an H-shaped steel column, the H-shaped steel beam is connected to the two sides of the H-shaped steel column, box-shaped plates are arranged on the two sides of the H-shaped steel column respectively, the box-shaped plates are welded to a web of the H-shaped steel beam and the inner side of a flange of the H-shaped steel beam, reinforcing steel bars penetrate through the two sides of the two box-shaped plates and the flange of the H-shaped steel column, and the two ends of the reinforcing steel bars are connected with nuts in a fastened mode through threads. The box-shaped plates are utilized, the steel bars are connected between the H-shaped steel beams and the H-shaped steel columns, and the box-shaped plates and the steel bars can greatly improve the tension bearing capacity of the beam-column joint, so that a catenary mechanism of the structure can be fully exerted, and the progressive collapse resistance of the structure is improved. The device is simple in structure and convenient to construct.

Description

Technical Field

[0001] The utility model belongs to the field of steel structures, and in particular relates to a beam-column connection node for resisting continuous collapse of steel structures. Background Art

[0002] A progressive collapse scenario involves localized damage in the initial stages, which propagates from one part of the structure to adjacent parts, ultimately leading to the overall or widespread collapse of the structure. To avoid progressive collapse, alternative paths for load transfer are often used in the design. In this approach, if critical components such as columns and load-bearing walls are damaged, other available paths are used to complete the load transfer. Most existing beam-column shear connection nodes are insufficiently redundant. In the event of column failure due to accidental loads in a steel structure, a catenary mechanism is required to resist progressive collapse. Therefore, this patent invents a progressive collapse resistant node connection method for steel structure beam-column nodes, which enables the steel structure to form a catenary mechanism and improve the working capacity of the mechanism. Utility Model Content

[0003] The utility model aims to provide a steel structure anti-continuous collapse beam-column connection node, so that the structure can form a catenary mechanism.

[0004] The technical solution of the utility model is: a steel structure anti-continuous collapse beam-column connection node, comprising an H-shaped steel beam and an H-shaped steel column, the H-shaped steel beam is connected on both sides of the H-shaped steel column, box plates are respectively arranged on both sides of the H-shaped steel column, the box plates are welded to the web of the H-shaped steel beam and the inner side of the flange of the H-shaped steel beam, steel bars are arranged on both sides of the two box plates and the flange of the H-shaped steel column, and nuts are fastened by threads at both ends of the steel bars.

[0005] As a further improvement of the utility model, box-shaped plates, steel bars and nuts are provided on both sides of the web of each H-shaped steel beam.

[0006] As a further improvement of the utility model, a plurality of first stiffening ribs are provided at the right-angle connection between the H-shaped steel beam and the H-shaped steel column.

[0007] As a further improvement of the utility model, a second stiffening rib is provided at the outer corner of the box-shaped plate.

[0008] The beneficial effects of the utility model are as follows: the utility model utilizes a box-shaped plate to connect steel bars between an H-shaped steel beam and an H-shaped steel column, and the box-shaped plate and the steel bars can greatly improve the tensile bearing capacity of the beam-column node, so that the catenary mechanism of the structure can be fully utilized, and the ability of the structure to resist continuous collapse is improved. The utility model has a simple structure and is convenient to construct. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0010] Figure 2 It is a main structural schematic diagram of the utility model;

[0011] Figure 3 It is a structural schematic diagram of the box-type plate in the utility model.

[0012] In the figure: 1-H-shaped steel beam; 11-H-shaped steel beam flange; 12-H-shaped steel beam web; 2-H-shaped steel column; 21-H-shaped steel column flange; 3-box plate; 4-rebar; 5-nut; 6-first stiffening rib; 7-node plate; 8-second stiffening rib. DETAILED DESCRIPTION

[0013] The utility model is described in detail below in conjunction with the accompanying drawings.

[0014] like Figure 1-3 As shown, a steel structure anti-continuous collapse beam-column connection node includes an H-shaped steel beam 1 and an H-shaped steel column 2. The H-shaped steel beam 1 is connected to both sides of the H-shaped steel column 2. Box plates 3 are respectively provided on both sides of the H-shaped steel column 2. The box plates 3 are rectangular frames with a certain thickness. The box plates 3 are welded to the web 12 of the H-shaped steel beam and the inner side of the flange 11 of the H-shaped steel beam. Steel bars 4 are provided on both sides of the two box plates 3 and the flange 21 of the H-shaped steel column. Nuts 5 are fastened at both ends of the steel bars 4 by threads.

[0015] Box plates 3, steel bars 4 and nuts 5 are provided on both sides of the H-shaped steel beam web 12 of each H-shaped steel beam 1. Four box plates 3 are provided in total.

[0016] A plurality of first stiffening ribs 6 are provided at the right-angle connection between the H-shaped steel beam 1 and the H-shaped steel column 2 .

[0017] Second stiffening ribs 8 are provided at the outer corners of the box-type plate 3 to prevent stress concentration.

[0018] The flange 11 of the H-shaped steel beam is welded to the flange 21 of the H-shaped steel column. The H-shaped steel column 2 is usually provided with a gusset plate 7 after being processed in the factory, and the gusset plate 7 is connected to the web 12 of the H-shaped steel beam by bolts.

[0019] Embodiment 1,

[0020] The steel bar 4 is made of high-strength steel bar with a diameter of 25 mm.

[0021] The nut 5 is a high-strength nut, and two nuts 5 are arranged at each end of the steel bar 4.

[0022] The thickness of the box plate 3 can be specifically designed according to the needs; the length can be selected according to the span of the steel beam, and is designed to be no less than 1 / 20 of the smaller beam span, generally no less than 300mm and no more than 600mm.

[0023] Three stiffening ribs 6 are provided at each right-angle connection between the H-shaped steel beam 1 and the H-shaped steel column 2 .

[0024] There are three stages for the structure to resist progressive collapse: beam mechanism stage, transition stage and catenary mechanism. Among them, the beam mechanism stage mainly provides the force to resist progressive collapse through the bending bearing capacity of the beam-column node; the transition stage is the stage of transition from the beam mechanism to the catenary mechanism, during which the effect of the beam mechanism gradually decreases and the effect of the catenary mechanism gradually increases; the catenary mechanism provides the force to resist progressive collapse through the tensile bearing capacity of the node, and the tensile bearing capacity of the beam-column node plays a vital role in the effective functioning of the catenary mechanism.

[0025] The high-strength steel bars 4 have a high tensile bearing capacity. The tensile force generated by the H-shaped steel beams 1 on both sides of the H-shaped steel columns 2 can be borne by the high-strength steel bars 4. Therefore, the connection structure of the box plates 3 on both sides of the H-shaped steel beam web 12 and the high-strength steel bars 4 can greatly improve the tensile bearing capacity of the beam-column node, so that the catenary mechanism of the structure can be fully utilized and the structure's ability to resist continuous collapse can be improved.

[0026] The utility model is suitable for the connection nodes between H-shaped steel beams and H-shaped steel columns, and is also suitable for the connection nodes between H-shaped steel beams and box-shaped steel columns.

Claims

1. A steel structure anti-continuous collapse beam-column connection node, comprising an H-shaped steel beam and an H-shaped steel column, wherein the H-shaped steel beam is connected to both sides of the H-shaped steel column, and is characterized in that: Box plates (3) are respectively provided on both sides of the H-shaped steel column (2), the box plates (3) are welded to the H-shaped steel beam web (12) and the inner side of the H-shaped steel beam flange (11), and steel bars (4) are provided through both sides of the two box plates (3) and the H-shaped steel column flange (21), and nuts (5) are fastened at both ends of the steel bars (4) by means of threads.

2. A steel structure anti-continuous collapse beam-column connection node according to claim 1, characterized in that: Box plates (3) as well as steel bars (4) and nuts (5) are provided on both sides of the H-shaped steel beam web plate (12) of each H-shaped steel beam (1).

3. A steel structure anti-continuous collapse beam-column connection node according to claim 1 or 2, characterized in that: A plurality of first stiffening ribs (6) are provided at the right-angle connection between the H-shaped steel beam (1) and the H-shaped steel column (2).

4. A steel structure anti-continuous collapse beam-column connection node according to claim 3, characterized in that: Second stiffening ribs (8) are provided at the outer corners of the box-shaped plate (3).

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