A double-arch steel frame beam-column node reinforcement device with graded energy dissipation function

Abstract

The present invention discloses a double-arch steel frame beam-column node reinforcement device with graded energy dissipation function, which belongs to the technical field of steel structure reinforcement. It includes H-shaped steel beams and steel column components, horizontal ribs, arch ribs, ear plates, inner arches and rubber pads. H-shaped steel beam components are welded on the outer sides of the left and right flanges of the H-shaped steel column, and two horizontal ribs are welded on the inner side, which are at the same height as the upper and lower flanges of the H-shaped steel beam components; ear plates are welded on the four ends of the arch ribs, and the inner side is connected to the inner arch; rubber pads are clamped between the inner arch and the arch ribs; the ear plates are evenly provided with strip sliding holes at a certain interval; the horizontal ribs, rubber pads, and inner arches are correspondingly provided with bolt holes; the horizontal ribs, ear plates, rubber pads and inner arches are connected and installed by high-strength bolts. Under the action of an earthquake, the inner arch yields first, increasing energy dissipation, and the inner arch bends have a smooth transition to prevent stress concentration. The present invention can effectively reduce the damage caused by the earthquake to the steel beams and columns, is conducive to post-earthquake repairs, and has good economic efficiency.

Description

Technical Field

[0001] The invention relates to a double-arch steel frame beam-column node reinforcement device with a graded energy dissipation function, belonging to the technical field of steel structure reinforcement. Background Art

[0002] Compared with traditional brick-concrete structures, steel structures have the advantages of light weight, high strength and good earthquake resistance. They can be recycled during the construction process and are in line with the country's sustainable development strategy. Therefore, steel structure buildings are widely used in China.

[0003] The stress of the beam-column joints of traditional steel frames is complex, and the quality of each performance directly determines the reliability of the structural bearing capacity. At present, most of the steel structure buildings still use the method of welding the beams and column side walls, but during the welding process, there will be defects such as cracks and pores in the welds, which leads to the phenomenon that the node area of ​​the steel structure building first undergoes brittle failure during the load-bearing process, which violates the design concept of "strong nodes, weak components". Therefore, it is necessary to strengthen and improve the beam-column welding nodes. Summary of the invention

[0004] In order to solve the above problems, the present invention provides a double-arch steel frame beam-column node reinforcement device with a graded energy dissipation function, comprising: an H-shaped steel beam, an H-shaped steel column, a horizontal rib plate, and an arch rib plate; the H-shaped steel beams are two and symmetrically welded on both sides of the flange of the H-shaped steel column; the flange of the H-shaped steel beam is perpendicular to the flange of the H-shaped steel column component; two horizontal rib plates are welded on the inner side of the flange of the H-shaped steel column, the arch rib plates are two and are located between the two horizontal rib plates, and the arch tops of the two arch connecting rib plates are in conflict with each other.

[0005] In one embodiment of the present invention, the two ends of the arched rib are connected with inner arches, and the inner arches are formed by bending the two ends of the I-shaped steel sheet by 90 degrees, and the bending part of the inner arch has a smooth transition.

[0006] In one embodiment of the present invention, two ends of the arched rib are respectively welded to ear plates, and the ear plates are of the same width as the arched rib.

[0007] In one embodiment of the present invention, a rubber pad is provided between the arched rib and the inner arch.

[0008] In one embodiment of the present invention, strip-shaped sliding holes are provided on the ear plate.

[0009] In one embodiment of the present invention, the inner arch is provided with inner arch bolt holes at the bent parts at both ends, the horizontal rib is provided with rib bolt holes, the rubber pad is provided with rubber pad bolt holes, and the arch ribs, rubber pads and inner arches are installed on the horizontal ribs by high-strength bolts passing through the strip sliding holes, rib bolt holes, inner arch bolt holes and rubber pad bolt holes.

[0010] In one embodiment of the present invention, the length of the gap between the ear plate and the flange of the H-shaped steel column is the same as the thickness of the flange of the H-shaped steel column.

[0011] In one embodiment of the present invention, the rectangular area enclosed by the horizontal ribs and the inner sides of the two flanges of the H-shaped steel column is the node area, and the width of the arched ribs is equal to the width of the horizontal ribs.

[0012] In one embodiment of the present invention, the two horizontal ribs and the neutral layers of the two flanges of the H-shaped steel column are respectively located in the same plane.

[0013] In one embodiment of the present invention, the two horizontal ribs are arranged in parallel up and down and parallel to the ground, and the gap distance between the two horizontal ribs is equal to the gap distance between the upper and lower flanges of the H-shaped steel beam.

[0014] Beneficial effects:

[0015] 1. The present invention utilizes arched ribs and inner arches to reinforce the H-shaped steel beam-column welding nodes, and utilizes the arched pressure resistance and energy dissipation characteristics to improve the strength and rigidity of the steel beam-column; utilizes the arched ribs and inner arches' plastic deformation and energy dissipation characteristics to improve the plasticity of the overall structure, avoid damage to the main stress nodes of the main structure, and improve the safety and overall performance of the structure.

[0016] 2. The present invention adopts high-strength bolt connection to fix the nodes of the arched ribs, inner arches and horizontal ribs. It is not only convenient to assemble and easy to operate, but also can adapt to beams and columns of different cross-sectional sizes. The arched ribs are in conflict with each other, and can rotate and slide relative to each other with the displacement and deformation of the beams and columns during an earthquake, thereby increasing the buffering effect. Strip sliding holes are provided at the ear plates at the ends of the arched ribs. During an earthquake, the arched ribs and the inner arches can move with the sliding holes, converting kinetic energy into potential energy of the double arches and the inner arches, thereby increasing the plasticity of the steel beam-column nodes, thereby reducing the damage to the steel beams and columns caused by earthquake displacement, which is beneficial to post-earthquake repairs and has good economic efficiency.

[0017] 3. The present invention improves the seismic resistance of the node by combining the inner arch and the arch ribs to bear the force. Under the action of a small earthquake, the small arch participates in the force more first; as the earthquake intensifies, the small arch yields, the displacement and deformation of the node increases, the large arch begins to participate more in the force, and begins to consume friction energy in the strip-shaped sliding hole, enhancing the plasticity of the node. The arch ribs and the inner arch are clamped with rubber pads to increase the sliding energy consumption and viscous resistance; the inner arch is groove-shaped, and the thickness and width at the web are reduced relative to the flange. Under the action of an earthquake, the inner arch yields first, increasing energy consumption, and the inner arch bend has a smooth transition to prevent stress concentration. The present invention can effectively reduce the damage caused by earthquakes to steel beams and columns, is conducive to post-earthquake repairs, and has good economic efficiency.

[0018] 4. The reinforcement method of the present invention makes up for the shortcomings of the traditional steel beam and column connection nodes that the weld area is prone to tearing and brittle fracture under the influence of earthquakes. In small or medium earthquakes, the inner arch yields first, increasing energy consumption. At the same time, the arched ribs buffer the energy consumption and carry the load together. The arch top and the end connection sliding hole can also rotate and slide relative to each other, which enhances the plasticity of the steel beam and column connection nodes and reduces the possibility of brittle fracture of the steel beam and column connection nodes due to displacement caused by earthquakes. In large earthquakes, the present invention can give priority to ensuring the sufficiency of energy consumption in the node area, so that the energy consumption concentration area is transferred to the end of the steel beam, thereby realizing the design concept of "strong column, weak beam, strong node". In addition, the present invention is a replaceable component and can be reused. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional schematic diagram of the overall structure of Example 1;

[0020] Figure 2 It is a schematic diagram of assembling the overall structure and the arched ribs of Example 1;

[0021] Figure 3 Schematic diagram of the detailed structure of the arched rib and the inner arch node of Example 1;

[0022] Figure 4 It is a schematic diagram of the detailed structure of the horizontal rib plate of Example 1;

[0023] Figure 5 Schematic diagram of the detailed structure of the arch rib plate of Example 1;

[0024] Figure 6 It is a schematic diagram of the inner arch production and detailed structure of Example 1;

[0025] Figure 7 Schematic diagram of the detailed structure of the rubber pad of Example 1;

[0026] In the figure: 1. H-shaped steel beam; 2. H-shaped steel column; 3. Horizontal rib; 4. Arch rib; 5. Inner arch; 6. Rubber pad; 7. Ear plate; 8. Strip sliding hole; 9. Rib bolt hole; 10. High-strength bolt pair; 11. Inner arch bolt hole; 12. Rubber pad bolt hole; 13. "I"-shaped steel sheet. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be described completely and clearly below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0028] like Figure 1-6As shown, this embodiment provides a double-arch rib steel beam-column node reinforcement device, including: H-shaped steel beam 1, H-shaped steel column 2, horizontal rib plate 3, arch rib plate 4, inner arch 5, rubber pad 6, ear plate 7, strip sliding hole 8, rib plate bolt hole 9, high-strength bolt 10, inner arch bolt hole 11, and rubber pad bolt hole 12.

[0029] Two H-shaped steel beams 1 are symmetrically welded on both sides of the flange of the H-shaped steel column 2, and the flange of the H-shaped steel beam 1 is perpendicular to the flange of the H-shaped steel column member 2;

[0030] Two horizontal ribs 3 are welded to the inner side of the flange of the H-shaped steel column 2, and the two horizontal ribs 3 and the neutral layers of the two flanges of the H-shaped steel column 2 are respectively located in the same plane; the horizontal ribs 3 are provided with rib bolt holes 9;

[0031] There are two arched ribs 4, which are located between two horizontal ribs 3. Both ends of the arched ribs 4 are welded to ear plates 7 respectively. The ear plates 7 are as wide as the arched ribs 4. The arch tops of the two arched connecting ribs 4 are in contact with each other.

[0032] The ear plate 7 is provided with a strip-shaped sliding hole 8; the inner arch 5 is located in the arch-shaped rib plate 4, and the inner arch 5 is formed by bending the two ends of an "I"-shaped steel sheet 13 by 90 degrees, and inner arch bolt holes 11 are provided at the bent parts at both ends; the bending part of the inner arch 5 has a smooth transition to prevent stress concentration.

[0033] The rubber pad 6 is clamped between the arch rib 4 and the inner arch 5, and a rubber pad bolt hole 12 is provided on the rubber pad 6;

[0034] The arched ribs 4, rubber pads 6 and inner arches 5 are installed on the horizontal ribs 3 by high-strength bolts 10 passing through the strip sliding holes 8, rib bolt holes 9, inner arch bolt holes 11 and rubber pad bolt holes 12.

[0035] Furthermore, the gap length between the ear plate 7 and the flange of the H-shaped steel column 2 is the same as the flange thickness of the H-shaped steel column 2, which can avoid weld residual stress and high-temperature heat-affected zone, and ensure the connection reliability of the arch rib 4 and the inner arch 5.

[0036] Furthermore, the rectangular area enclosed by the horizontal rib 3 and the inner sides of the two flanges of the H-shaped steel column 2 is the node domain, and the width of the arched rib 4 is equal to the width of the horizontal rib 3, which can increase the stiffness and strength of the node domain, improve its bearing capacity, delay the buckling of the node domain, and increase its stability.

[0037] Furthermore, the two horizontal ribs 3 are arranged in parallel up and down and parallel to the ground, and the gap distance between the two horizontal ribs 3 is equal to the gap distance between the upper and lower flanges of the H-shaped steel beam 1.

[0038] Working principle: the arched ribs 4 are in contact with each other, and can rotate and slide relative to each other with the displacement and deformation of the H-shaped steel beam during an earthquake, thereby increasing the buffering effect; during an earthquake, the arched ribs 4 and the inner arches 5 can move with the strip sliding holes 8, converting kinetic energy into potential energy of the double arched ribs 4 and the inner arches 5, thereby increasing the plasticity of the steel beam-column node and reducing the damage to the steel beams and columns caused by earthquake displacement.

[0039] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A steel frame beam-column node reinforcement device, characterized in that: include: H-shaped steel beam, H-shaped steel column, horizontal ribs, arched ribs; there are two H-shaped steel beams, which are symmetrically welded to the two sides of the flange of the H-shaped steel column; the flange of the H-shaped steel beam is perpendicular to the flange of the H-shaped steel column member; two horizontal ribs are welded to the inner side of the flange of the H-shaped steel column, there are two arched ribs and they are located between the two horizontal ribs, and the arches of the two arched ribs are in conflict with each other; The two ends of the arched rib are connected with inner arches, the inner arch is located inside the arched rib, the inner arch is formed by bending the two ends of the I-shaped steel sheet by 90 degrees, and the bending part of the inner arch has a smooth transition; The steel frame beam-column node reinforcement device also includes ear plates, both ends of the arched ribs are respectively welded to the ear plates, and the ear plates are as wide as the arched ribs; A rubber pad is provided between the arch-shaped rib and the inner arch; The ear plate is provided with a strip-shaped sliding hole.

2. A steel frame beam-column node reinforcement device as claimed in claim 1, characterized in that: The inner arch is provided with inner arch bolt holes at the bent parts at both ends, the horizontal rib is provided with rib bolt holes, and the rubber pad is provided with rubber pad bolt holes. The arched ribs, rubber pads and inner arches are installed on the horizontal ribs by high-strength bolts passing through strip sliding holes, rib bolt holes, inner arch bolt holes and rubber pad bolt holes.

3. A steel frame beam-column node reinforcement device as claimed in claim 2, characterized in that: The length of the gap between the ear plate and the flange of the H-shaped steel column is the same as the thickness of the flange of the H-shaped steel column.

4. A steel frame beam-column node reinforcement device as claimed in claim 3, characterized in that: The rectangular area enclosed by the horizontal ribs and the inner sides of the two flanges of the H-shaped steel columns is the node area, and the width of the arched ribs is equal to the width of the horizontal ribs.

5. A steel frame beam-column node reinforcement device as claimed in claim 4, characterized in that: The two horizontal ribs and the neutral layers of the two flanges of the H-shaped steel column are respectively located in the same plane.

6. A steel frame beam-column node reinforcement device as described in any one of claims 1 to 5, characterized in that: The two horizontal ribs are arranged in parallel up and down and are parallel to the ground, and the gap distance between the two horizontal ribs is equal to the gap distance between the upper and lower flanges of the H-shaped steel beam.

Images