Modular buckling restrained brace beam column insertion type connecting joint

Abstract

The utility model provides a modular buckling restrained brace beam column insertion type connecting joint, belongs to the technical field of fabricated buildings, and solves the problems of low mounting efficiency, high maintenance difficulty, low strength, low support energy consumption, poor support surface external stability and the like existing in a joint when an existing brace is connected with a structural beam column. The joint comprises an H-shaped steel column, an I-shaped steel beam, a buckling restrained brace, a steel joint prefabricated module connecting piece, a beam-column prefabricated module connecting piece, an anti-lateral steel plate, an H-shaped stiffening rib and an L-shaped stiffening rib, the brace in the joint is connected in a high-strength bolt insertion mode, and the joint has the advantages of being convenient to construct, high in installation efficiency and easy to repair after an earthquake. The prefabricated steel module can increase the sector inertia moment of the cross-shaped connecting section, so that the prefabricated steel module counteracts the load of the support keeping a linear balance form, and the out-of-plane stability of the support is improved. Meanwhile, the connecting length of the support is shortened, the energy dissipation capacity of the support is improved, and the problem of in-plane bending moment response caused by the too long connecting section is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of assembled buildings, and in particular to a modular buckling-restrained support beam-column insertion-type connection node. Background Art

[0002] In recent years, with the construction of high-rise and super-high-rise buildings in China, the research and application of buckling restrained braces in high seismic fortification intensity areas have continued to heat up. Buckling restrained braces have good energy dissipation capacity and can increase the lateral stiffness of the structure. The support undergoes plastic deformation during an earthquake, controlling the main structure to be basically within the elastic range to avoid structural damage. Through the traditional wet installation of the support, the beams and columns of the structure require a large amount of reinforcement, the steel bars are prone to conflict with the installation of the core area of ​​the node plate, the node plate is difficult to install, and the installation accuracy of the support is low. Prefabricated steel structures have the advantages of strong seismic performance, high installation accuracy, high construction efficiency, and high recycling rate. Combining the advantages of prefabricated steel structures with the energy dissipation of buckling restrained braces has good application prospects in actual engineering.

[0003] At present, the connection methods between buckling restrained supports and structures mainly include bolt connection, pin connection and welding connection. Pin connection requires high installation accuracy, has poor hysteresis performance under earthquake action, cannot fully reflect the full energy dissipation capacity of the support, and is rarely used in actual projects. Welded connection nodes have high docking accuracy, high construction difficulty, high difficulty in post-earthquake maintenance, and poor torsional performance. The stiffness of the node is reduced after welding, and under the reciprocating tension and compression of the earthquake, it is easy to cause the node plate to crack or cause local cracking of the flange at the column end or beam end. The bolt connection method has the problem of too long bolt connection section. Too long connection section will lead to a reduction in energy dissipation section, and the energy dissipation of the support energy dissipation section will be reduced.

[0004] In view of the problems of low installation efficiency, high maintenance difficulty, low strength, low support energy consumption, and poor out-of-plane stability of the current support nodes, a modular buckling-restrained support beam-column insertion connection node is designed. This node can shorten the length of the connection section and improve the support energy consumption under the same conditions. At the same time, the modular design of the components reduces the difficulty of installation and maintenance. Adding lateral steel plates on the sides of the node increases the strength and stiffness of the node, while increasing the stability of the support connection section to ensure that the support fully exerts its energy consumption capacity. This node meets the requirements of "strong node and weak component" and "strong column and weak beam", so that the support can fully play the role of "first line of defense", thereby improving the safety of the overall structure.

[0005] Chinese patent application No. 201711488465.6 discloses a prefabricated modular buckling restrained support bolt-welded hybrid connection node, which mainly includes a prefabricated steel module, a buckling restrained support, a high-strength bolt and a connecting weld. It is characterized in that: the prefabricated steel module is fixed to the structural column by high-strength bolts to form a cross-shaped groove; the connecting section of the support is connected to the above-mentioned groove by high-strength bolts; the connecting weld is arranged at the edge where the plug plate and the groove are connected. Under the action of strong earthquakes, there is no effective and reliable connection relationship between the prefabricated steel module, the structural column and the support used in the node, and the node strength and lateral resistance are insufficient. The cross-shaped groove is embedded in the way to reduce the fan-shaped moment of inertia I of the connecting section. W The improvement is small, and the torsional performance of the connection section has no significant improvement. At the same time, welding is prone to cracking of the connection section. Multiple welding may cause initial bending moments, and the connection section is prone to out-of-plane buckling, which reduces the energy dissipation capacity of the support.

[0006] Chinese patent application No. 201110138642.4 discloses an end local elongation buckling-resistance brace-beam-column connection node, comprising an I-beam, an H-shaped steel column, a frame node plate, an end local elongation node and a plurality of high-strength bolts, characterized in that: the middle node plate of the frame node plate is inserted into the open groove on the end local elongation node; the two local elongation stiffening ribs of the above node are connected to the node plate by high-strength bolts; the middle core plate and the local elongation stiffening rib or the local elongation core plate are welded to the middle node plate. The structural form of the support requires multiple welding, which is easily affected by the construction environment and welding process, and may cause uneven force at the contact position of the support end and fracture. Due to the peculiar shape of the support, a specific template needs to be set up for factory prefabrication, which increases the cost of the support.

[0007] Considering that the tensile and compressive strength and stiffness of the node connection are insufficient under the action of earthquake, the node plate will crack and buckle out of the plane, reducing the bearing capacity of the structural components and causing the structural components to be damaged. At the same time, due to the stability of the support connection section and the excessive energy consumption of the connection section, which affects the energy consumption of the support, a modular buckling restrained support beam-column insertion connection node is designed. The support and the beam-column are connected by inserting high-strength bolts. The reserved holes in the support cross plate and the prefabricated steel module are fixed by high-strength bolts. At the same time, anti-lateral steel plates are added on both sides of the beam and column and U-shaped grooves are reserved. Then the support and the prefabricated steel module are inserted into the U-shaped groove as a whole and locked. The load on the structure is directly transmitted to the support through the prefabricated steel module. The shorter connection length causes the support to buckle and consume more energy, thereby improving the safety of the structure.

[0008] Prefabricated steel modules can increase the fan-shaped inertia moment of the cross-shaped connection section, so that the prefabricated steel modules can offset the load of the support in the form of linear balance and avoid torsional buckling of the support. The addition of lateral steel plates can greatly increase the lateral stiffness of the node and prevent the node from lateral displacement, thereby increasing the energy consumption of the support. At the same time, the lateral connectivity of the beam, column and support connection is enhanced, and the beam, column and support are laterally connected into a whole, which improves the lateral bearing capacity of the beam and column. Insertion-type nodes have the advantages of convenient construction and high installation efficiency. High-strength bolts are used to fix the components, which has the characteristics of easy replacement of supports after earthquakes and little structural damage. Utility Model Content

[0009] Taking into account the above factors and combining the stress characteristics of the support and beam-column connection nodes, the utility model proposes a modular buckling-constrained support beam-column plug-in connection node, replacing the node plate with a steel node prefabricated module connector that can enhance the out-of-plane stability of the support, shortening the connection length of the support while increasing the out-of-plane stability of the support. At the same time, anti-lateral steel plates are added on both sides of the support-beam-column, making the docking installation simple and significantly improving the lateral resistance of the beam and column. The node is fully prefabricated and assembled in the factory and docked on site by plug-in. This method has the characteristics of convenient assembly, high installation efficiency, and easy replacement after an earthquake, so that the construction cost is effectively controlled. The length of the energy-consuming section of the support is increased, which improves the energy-consuming capacity of the support, reduces damage to the structure and performance degradation, and has a high practical application value.

[0010] In order to achieve the above effects, the utility model adopts the following technical solutions:

[0011] A modular buckling restrained support beam-column insert-type connection node, comprising an H-shaped steel column, an I-shaped steel beam, a buckling restrained support, a steel node prefabricated module connector, a beam-column prefabricated module connector, an anti-lateral steel plate, an H-shaped stiffening rib, an L-shaped stiffening rib, and high-strength bolts. The I-shaped steel beam is fixed to the steel node prefabricated module connector through the beam-column prefabricated module connector, and the anti-lateral steel plate is fixed to the beam-column prefabricated module connector through eight sets of through bolts, and a U-shaped groove is formed between the beam and the column. The steel node prefabricated module connector is fixed to the buckling restrained support connection section through high-strength bolts to form a buckling restrained support module, and forms a support insert-type node along the preset groove with the H-shaped steel column, the I-shaped steel beam and the anti-lateral steel plate.

[0012] Furthermore, an H-shaped stiffening rib is arranged between the flanges of the H-shaped steel column, and is fixed to the H-shaped steel column and the steel node prefabricated module connector by four sets of high-strength bolts. The anti-lateral steel plate is tightly fitted to the H-shaped steel column, the upper edge of the anti-lateral steel plate is flush with the upper edge of the H-shaped stiffening rib, and the lower edge is aligned with the lower flange of the I-beam, and a U-shaped groove is formed between the beam and the column.

[0013] Furthermore, the anti-lateral steel plate is a rectangular right-angle plate with beveled sides on the upper left and right sides, the inclination angle and length of the beveled sides are in line with the side edges of the steel node prefabricated module connector, and the length and inclination of the beveled sides are determined according to the required inclination angle of the support.

[0014] Furthermore, the lateral-resisting steel plate is provided with through holes corresponding to the screw holes of the steel node prefabricated module connector and the beam-column prefabricated module connector.

[0015] Furthermore, the beam-column prefabricated module connector is connected to the upper and lower flanges and web of the I-beam by high-strength bolts.

[0016] Furthermore, the beam-column prefabricated module connector is a rectangular steel module, the bottom end of which is sealed and the whole is a U-shaped groove. Each surface is reserved with perforations, and the upper and lower perforations are positioned in the same manner as the left and right perforations; the upper perforations correspond to the reserved perforations at the bottom of the steel node prefabricated module connector, clamping the upper flange of the I-beam up and down; the lower perforations correspond to the upper perforations of the L-shaped stiffening rib, clamping the lower flange of the I-beam up and down; the corresponding perforations on the left and right sides are connected to the lateral steel plate at one end, and the web of the I-beam at another end.

[0017] Furthermore, an L-shaped stiffening rib under the beam is provided between the I-beam and the H-shaped steel column. The stiffening rib is provided with four triangular steel modules welded thereto, and both sides thereof are fixed to the beam and column respectively by four groups of high-strength bolts.

[0018] Furthermore, the steel node prefabricated module connector includes a first steel node prefabricated module connector, a second steel node prefabricated module connector, a third steel node prefabricated module connector and a fourth steel node prefabricated module connector, and a single steel node prefabricated module connector is divided into a connecting section and a fixing section. The sizes are all the same, and specifically, the opening positions of the connecting section and the fixing section are different.

[0019] Furthermore, the steel node prefabricated module connector determines the size and inclination angle of each module based on the inclination angle required for the support.

[0020] Furthermore, the connecting sections of the four steel node prefabricated module connectors clamp the cross-shaped support connecting section through an L-shaped edge on one side, and are fixed by high-strength bolts penetrating through reserved holes inside the components to form a buckling restrained support module.

[0021] In summary, the above node connection can achieve the following beneficial effects:

[0022] (1) The utility model adopts an inserted installation support and installs a lateral steel plate between the beam and column to constrain the node and the beam and column, which can improve the node bearing capacity, increase the out-of-plane stiffness of the node, improve the ductility of the beam-column component and give full play to the energy dissipation capacity of the support, effectively preventing local damage at the node from causing problems such as premature buckling of the support and torsion of the component.

[0023] (2) Stiffening ribs are set at multiple locations at the node connections to improve the bearing capacity and ductility of the components, meet the regulatory requirements of "strong nodes and weak components" and "strong columns and weak beams", and enable the supports to fully play the role of "the first line of defense", thereby improving the safety performance of the overall structure.

[0024] (3) Using steel node prefabricated module connectors connected by high-strength bolts, under the same conditions, the high-strength bolt connection length is shortened by half, which greatly improves the energy dissipation capacity of the support, avoids the in-plane bending moment response problem caused by the excessive length of the connection section, and increases the fan-shaped inertia moment I of the cross-shaped section of the support. w , thereby improving the torsional performance of the supporting section.

[0025] (4) The node structure is easy to install and disassemble. The entire node has a high recyclability and assembly degree. All accessories can be prefabricated in the factory with reliable precision and convenient assembly. The nodes are all connected by bolts, which is conducive to the replacement and repair of supports after the earthquake, effectively reducing the high cost caused by the overall demolition of the structural system due to replacement and repair, and avoiding construction and installation problems and welding process problems caused by multiple welding. During the plug-in installation process, the fixed position does not need to be supported for a long time, reducing the difficulty of construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings illustrate exemplary embodiments of the present invention and are used to explain the principle of the present invention together with the description. These drawings are included to provide a further understanding of the present invention, and the drawings are included in and constitute a part of this specification.

[0027] Figure 1 A schematic diagram of a node structure provided by the utility model;

[0028] Figure 2 This is a schematic diagram of the beam-column installation process of the utility model;

[0029] Figure 3 This is a schematic diagram of the connection of the support module of the utility model;

[0030] Figure 4 This is a schematic diagram of the insertion connection between the support module and the beam column of the utility model;

[0031] Figure 5 This is a schematic diagram of the assembly of the beam-column prefabricated module connector of the utility model;

[0032] Figure 6 This is a schematic diagram of the structure of the steel node prefabricated module connector of the utility model;

[0033] Figure 7 This is a schematic diagram of the structure of the beam-column prefabricated module connector of the utility model;

[0034] Description of the drawings: 1-H-shaped steel column; 2-I-shaped steel beam; 3-buckling restrained support; 4-steel node prefabricated module connector, 401-first steel node prefabricated module connector, 402-second steel node prefabricated module connector, 403-third steel node prefabricated module connector, 404-fourth steel node prefabricated module connector; 5-beam-column prefabricated module connector; 6-lateral anti-lateral steel plate; 7-H-shaped stiffening rib; 8-L-shaped stiffening rib; 9-high-strength bolts. DETAILED DESCRIPTION

[0035] The present invention is further described in detail below in conjunction with the accompanying drawings and implementation examples, so as to understand the purpose, technical solutions and advantages of the present invention. The specific implementation examples described herein are only used to explain the relevant content, and are not intended to limit the present invention.

[0036] In the description of the present invention, it should be noted that if the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the product of the application is usually placed when used. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0037] Combination Figure 1 and Figure 2 Description: A modular buckling restrained support beam-column inserted connection node includes an H-shaped steel column 1, an I-shaped steel beam 2, a buckling restrained support 3, a steel node prefabricated module connector 4, a beam-column prefabricated module connector 5, an anti-lateral steel plate 6, an H-shaped stiffening rib 7, an L-shaped stiffening rib 8 and a high-strength bolt 9, wherein the steel node prefabricated module connector 4 is composed of a first steel node prefabricated module connector 401, a second steel node prefabricated module connector 402, a third steel node prefabricated module connector 403 and a fourth steel node prefabricated module connector 404.

[0038] like Figure 1 and Figure 2 As shown, the middle of the H-shaped steel column 1 is provided with a plurality of bolt holes corresponding to the bottom bolt holes of the beam-column prefabricated module connector 5 and the H-shaped stiffening rib 7, and is fixed with high-strength bolts 9. The beam-column prefabricated module connectors 6 on both sides of the web of the I-shaped steel beam 2 clamp and fix it, wherein the flange of the I-shaped steel beam 2 is provided with a plurality of bolt holes corresponding to the openings of the above-mentioned beam-column prefabricated module connector 5 and the L-shaped stiffening rib 8, and the flange is clamped and fixed. The lateral steel plates 6 on both sides are fixed to the beam-column prefabricated module connectors 5 connected to the two sides of the column, and at the same time, they form a U-shaped plug-in node with the H-shaped steel column 1 and the I-shaped steel beam 2.

[0039] Under this structure, the support strength and lateral stiffness of the connection node are guaranteed. At the same time, since the beam-column prefabricated module connector 5 adopts a U-shaped groove rectangular tube, the effective connection area between the H-shaped steel column 1 and the I-shaped steel beam 2 is increased, avoiding the buckling of the beam end flange under the action of earthquake. At the same time, high-strength bolts 9 are used to fix the whole, which can effectively avoid the node column from being damaged before the beam. At the same time, L-shaped stiffening ribs 8 are set at the lower part of the beam-column connection, and four triangular plates are evenly arranged in the middle, which can increase the connection strength of the node connection under extreme reciprocating action.

[0040] The lateral-resistant steel plate 6 is a rectangular steel plate with the upper corner cut off based on the support inclination, and the holes are symmetrically opened on the left and right, respectively corresponding to the through holes of the steel node prefabricated module connector 4 and the beam-column prefabricated module connector 5. Its upper part is flush with the upper part of the beam-column prefabricated module connector 403 or 404 and the H-shaped stiffening rib 7, and is closely fitted with the H-shaped steel column 1 and the I-beam 2, thereby enhancing the lateral-resistant stiffness of the node.

[0041] like Figure 3 and Figure 4 As shown, two bolt openings are provided on each branch section of the cross-shaped connection section of the buckling restraint support 3 to fix the support connection section to the L-shaped right-angle side of the steel node prefabricated module connector 4. The first steel node prefabricated module connector 401, the second steel node prefabricated module connector 402, the third steel node prefabricated module connector 403, and the fourth steel node prefabricated module connector 404 clamp the connection section and use high-strength bolts 9 to fix it. In addition, the first steel node prefabricated module connector 401 and the second steel node prefabricated module connector 402 respectively clamp the flange of the I-beam 2 with the beam-column prefabricated module connector 5, and are connected and fixed by high-strength bolts 9; the third steel node prefabricated module connector 403 and the fourth steel node prefabricated module connector 404 respectively clamp the flange of the H-shaped steel column 1 with the H-shaped stiffening rib 7, and are fixed by high-strength bolts 9, which can effectively enhance the strength at the node.

[0042] The steel node prefabricated module connector 4 is prefabricated and assembled in the factory, which can ensure the processing accuracy and the docking accuracy of the support and the connector. Compared with the traditional method of docking the support and the connecting plate with the splicing plate covering the upper part, the bolt connection length is shortened by nearly half. In the traditional method, the load on the support will be transmitted to the node along the splicing plate, and the splicing plate is prone to breakage under fatigue load. The utility model directly disperses the support load on each prefabricated module connector, and then transmits it to the overall structure, improving the node stability and the energy consumption capacity of the support.

[0043] like Figure 5As shown, the I-beam 2 is symmetrically arranged with beam-column prefabricated module connectors 5. The upper part, lower part and the side close to the web of the beam-column prefabricated module connector 5 are connected with high-strength bolts 9. Compared with the traditional angle steel connection, the connection strength of the node is greatly increased. In terms of force transmission, the beam flange in the node connection area transmits the force to the connector and then to the column and the stiffening rib under the beam, while effectively moving the plastic hinge of the beam end outward to avoid damage or even destruction to the web of the node connection area.

[0044] like Figure 6 and Figure 7 As shown, the steel node prefabricated module connector 4 is composed of two rectangular plates and two right-angle plates with one corner cut off, and each plate has two bolt holes. The beam-column prefabricated module connector 5 is a rectangular bottom steel module, the side of which is connected to the beam and the anti-side steel plate 6, the upper and lower parts are connected to the beam flange, and the bottom is fixed to the column. After damage occurs, it is easy to replace, which improves the utilization rate of the main load-bearing components and saves materials.

Claims

1. A modular buckling restrained brace Beams and Columns The plug-in connection node is characterized in that: The invention comprises an H-shaped steel column (1), an I-shaped steel beam (2), a buckling restraint support (3), a steel node prefabricated module connector (4), a beam-column prefabricated module connector (5), a lateral steel plate (6), an H-shaped stiffening rib (7), an L-shaped stiffening rib (8), and a high-strength bolt (9). The beam-column prefabricated module connector (5) is placed at the connection between the H-shaped steel column (1) and the I-shaped steel beam (2), and the steel column is connected to the bottom of the beam-column prefabricated module connector (5) by means of high-strength bolts.

2. A modular buckling restrained brace according to claim 1 Beams and Columns The plug-in connection node is characterized in that: The connection section of the buckling restraint support (3) and the steel node prefabricated module connection piece (4) constitute a buckling restraint support module. Two holes are reserved in each support connection section, and the size and position of the holes are consistent with the size and position of the openings of the steel node prefabricated module connection piece (4). The steel node prefabricated module connection piece (4) forms an edge close to the right angle of the support connection section, and the plane where the hole is located is fixed to the support connection section by high-strength bolts.

3. A modular buckling restrained brace according to claim 1 Beams and Columns The plug-in connection node is characterized in that: An H-shaped stiffening rib (7) is provided inside the column at the connection between the H-shaped steel column (1) and the I-shaped steel beam (2), and the H-shaped stiffening rib (7) and the beam-column prefabricated module connecting piece (5) clamp the flange of the H-shaped steel column (1); an L-shaped stiffening rib (8) is provided at the lower part of the beam at the connection between the H-shaped steel column (1) and the I-shaped steel beam (2), and the L-shaped stiffening rib (8) and the beam-column prefabricated module connecting piece (5) clamp the lower flange of the I-shaped steel beam (2).

4. A modular buckling restrained brace according to claim 1 Beams and Columns The plug-in connection node is characterized in that: An anti-lateral steel plate (6) is provided on the outside of the connection between the H-shaped steel column (1) and the I-shaped steel beam (2). The anti-lateral steel plate (6) is a rectangular right-angle plate with beveled sides on the upper left and right sides. The beveled side inclination angle and length are in line with the side of the steel node prefabricated module connector (4), and the beveled side length and inclination angle are determined according to the required inclination angle of the support. The upper edge of the anti-lateral steel plate is flush with the upper edge of the H-shaped stiffening rib (7), and the lower edge is aligned with the lower flange of the I-shaped steel beam (2), and a U-shaped groove is formed between the beam and the column.

5. A modular buckling restrained brace according to claim 2 Beams and Columns The plug-in connection node is characterized in that: The steel node prefabricated module connectors (4) jointly clamp the upper flange of the I-beam (2) and are fixed by high-strength bolts (9); the steel node prefabricated module connectors (4) and the H-shaped steel column (1) clamp the column flange and are fixed by high-strength bolts (9).

6. A modular buckling restrained brace according to claim 4 Beams and Columns The plug-in connection node is characterized in that: The buckling restraint support module is fixed to the beam column by inserting into the above-mentioned groove, wherein the side of the steel node prefabricated module connector (4) is fixed to the anti-side steel plate (6) by high-strength bolts (9).

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