Prefabricated tiered energy dissipation combination nodes and their installation methods

Abstract

This invention relates to the field of building structure technology, and in particular to a novel prefabricated stepped energy-dissipating composite node and its installation method. It includes two interlocking square steel tube columns, which are connected to a steel beam via a connecting assembly. The connecting assembly includes an outer sleeve, a beam end connecting plate, and a stepped energy-dissipating damping device. The outer sleeve is fitted around the outer periphery of the two square steel tube columns, with the contact surfaces of the two columns placed inside the outer sleeve. A beam end connecting plate is installed at the end of the steel beam connected to the outer sleeve. The stepped energy-dissipating damping device is placed at the connection between the tube columns and the steel beam. The steel beam is connected to the square steel tube columns via the beam end connecting plate, the stepped energy-dissipating damping device, and the outer sleeve. This invention achieves a fully bolted "dry" connection and stepped deformation energy dissipation performance, meeting the requirement for rapid post-earthquake repair.

Description

Technical Field

[0001] This invention relates to the field of building structure technology, and in particular to a prefabricated tiered energy-dissipating composite node and its installation method. Background Technology

[0002] Precast modular structural systems are of great significance for promoting the industrialization of construction and have become a research hotspot in the field of civil engineering in recent years. Among existing modular structural systems, precast steel-concrete composite structures have advantages such as good load-bearing performance, high degree of industrialization, and energy conservation and environmental protection, and have become a new direction and trend in the development of precast structures. However, in existing studies of precast steel-concrete composite structures, beam-column joints still have a large number of welded connections, leading to problems such as long construction cycles, difficulty in ensuring weld quality, and a large amount of residual deformation. Even in some studies that consider bolted connections, there are still problems such as difficulty in timely replacement or repair after joint damage under strong earthquakes.

[0003] Metal energy-dissipating damping devices have shown significant effectiveness and stable performance in vibration control, making them an important research direction in the field of structural seismic resistance in recent years. However, existing research on the energy dissipation and vibration reduction of prefabricated steel-concrete composite structures is limited. Even in existing studies on metal energy-dissipating damping devices, some shortcomings remain, such as complex construction principles, difficulties in post-earthquake repair, inconvenient installation and use, and poor energy dissipation capacity. Summary of the Invention

[0004] The purpose of this invention is to solve the problems existing in the prior art and to provide a prefabricated stepped energy dissipation combination node and its installation method, which realizes stepped stress and deformation energy dissipation, improves the rapid repair capability after earthquake, and increases the functionality of the structure.

[0005] This invention provides a prefabricated tiered energy-consuming combined node, comprising two interlocking square steel pipe columns, which are connected to a steel beam via a connecting component;

[0006] The connecting assembly includes an outer sleeve, a beam end connecting plate, and a stepped energy-dissipating damping device. The outer sleeve is fitted around the outer periphery of two square steel pipe columns, and the contact surfaces of the two square steel pipe columns are placed inside the outer sleeve. A beam end connecting plate is installed at one end of the steel beam that connects to the outer sleeve. The stepped energy-dissipating damping device is placed at the connection between the pipe column and the steel beam. The steel beam is connected to the square steel pipe column through the beam end connecting plate, the stepped energy-dissipating damping device, and the outer sleeve.

[0007] The shape of the beam end connecting plate is adapted to the shape of the contact surface of the outer sleeve. The beam end connecting plate, the outer sleeve, and the square steel pipe column are connected by one-way bolts.

[0008] The inner wall of the outer sleeve is adapted to the shape of the square steel tube column.

[0009] The stepped energy-dissipating damping device is connected to the steel beam flange via high-strength bolts, ensuring the strength of the connection between the stepped energy-dissipating damping device and the steel beam flange.

[0010] The stepped energy-dissipating damping device is connected to the square steel pipe column via tie bolts. This ensures the strength of the connection between the stepped energy-dissipating damping device and the square steel pipe column.

[0011] The stepped energy-dissipating damping device includes a connecting damper and ear plates. The ear plates are placed inside the connecting damper, with one end fixed to the square steel pipe column. The ear plates are connected to the connecting damper via shear energy-dissipating rods. The connecting damper is connected to the flange of the steel beam via high-strength bolts, and the connecting damper is connected to the square steel pipe column via tie bolts. The connecting holes on the connecting damper are all elongated holes. The ear plates are made of cast steel or other high-strength steel, possessing sufficient rigidity and maintaining elasticity under external loads. The ear plates are not only an important connecting component in the stepped energy-dissipating damping device but also provide a limiting function for the square steel pipe column, ensuring accurate hoisting and installation.

[0012] The connecting damper is L-shaped, with a first slot on the side of the connecting damper closest to the square steel tube column. The ear plate and the connecting damper are engaged through the first slot, which improves the tightness of the connection between the ear plate and the connecting damper.

[0013] The connecting damper is equipped with stiffening plates on both sides, and the ear plate is connected to the stiffening plates on the connecting damper via shear energy dissipation rods. If the shear energy dissipation rods and the connecting damper are damaged under seismic loading, they can be replaced to achieve a recoverable function.

[0014] The beam end connecting plate extends beyond the top and bottom of the steel beam at both ends, and the connecting damper has a second slot that matches the top of the beam end connecting plate. This facilitates the rapid positioning and installation of the beam end connecting plate, and also helps to suppress warping deformation at the ends of the beam end connecting plate.

[0015] An installation method for a prefabricated, tiered energy-dissipating composite node, characterized by the following steps:

[0016] S1. Preprocessing, the preprocessing steps include:

[0017] S11. Weld the ear plate to the outer periphery of the square steel tube column;

[0018] S12. Weld the beam end connecting plate to one end of the steel beam, with the upper and lower ends of the beam end connecting plate extending beyond the upper and lower ends of the steel beam.

[0019] S2. Assembly of square steel pipe columns and steel beams. The assembly steps for square steel pipe columns and steel beams include:

[0020] S21. Fix the lower square steel pipe column, install the connecting damper at the ear plate position, and engage the first slot on the connecting damper with the ear plate.

[0021] S22. Install the outer sleeve, and the bottom of the outer sleeve falls into the second slot;

[0022] S23. Install the steel beam. Insert the beam end connecting plate into the second slot on the connecting damper from top to bottom. Connect and fix the beam end connecting plate, connecting damper, outer sleeve and lower square steel pipe column.

[0023] S24. Install the upper square steel pipe column, with the ear plate abutting against the beam end connecting plate and the top of the outer sleeve;

[0024] S25. Install the connecting damper between the upper flange of the connecting steel beam and the upper square steel pipe column. Place the top of the beam end connecting plate and the top of the outer sleeve in the second slot on the connecting damper. Connect and fix the connecting damper to the ear plate, the square steel pipe column and the upper flange of the steel beam.

[0025] S26. Pour concrete: Pour concrete into the assembled square steel pipe column to make the joint a whole.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] 1. The components of this invention are easy to process and manufacture, and adopt a dry bolt connection, which has good overall connectivity, load-bearing capacity and seismic performance.

[0028] 2. The present invention adopts a stepped energy dissipation damping device, wherein the shear energy dissipation rod is the first-stage energy dissipation damping component, which mainly achieves load bearing and energy dissipation through shear deformation; the connecting damper is the second-stage energy dissipation damping component, and the connecting holes on the connecting damper are all elongated holes, which can ensure that the shear energy dissipation rod undergoes shear deformation before entering the working state, and mainly achieves load bearing and energy dissipation through buckling deformation.

[0029] 3. The outer sleeve has a simple structure and not only serves to connect the upper and lower steel pipe columns, but also improves the load-bearing capacity and shear resistance of the core area of ​​the node.

[0030] 4. The ear plates are made of cast steel or other high-strength steel, possessing sufficient rigidity and maintaining elasticity under external loads. The ear plates are not only important connecting components in the stepped energy-dissipating damping device, but also serve a limiting function for the square steel pipe columns, ensuring accurate hoisting and installation.

[0031] 5. The upper and lower ends of the beam end connecting plate extend beyond the upper and lower ends of the steel beam, and the connecting damper is equipped with a second slot that matches the top of the beam end connecting plate. This facilitates the quick positioning and installation of the beam end connecting plate and helps to suppress warping deformation at the ends of the beam end connecting plate.

[0032] 6. The installation method of the present invention is reasonable, realizing the connection of two square steel pipe columns, greatly shortening the construction cycle and improving assembly efficiency. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the exploded structure of the present invention;

[0034] Figure 2 This is a three-dimensional structural schematic diagram of the stepped energy-dissipating damping device of the present invention;

[0035] Figure 3 This is a schematic diagram of installation step 1 of the present invention;

[0036] Figure 4 This is a schematic diagram of installation step 2 of the present invention;

[0037] Figure 5 This is a schematic diagram of installation step 3 of the present invention;

[0038] Figure 6 This is a schematic diagram of installation step 4 of the present invention;

[0039] Figure 7 This is a schematic diagram of installation step 5 of the present invention;

[0040] Figure 8 This is a schematic diagram of installation step 6 of the present invention;

[0041] Figure 9 This is a schematic diagram of installation step 7 of the present invention.

[0042] In the diagram: 1. Square steel pipe column; 2. Ear plate; 3. Connecting damper; 4. Shear energy dissipation bar; 5. High-strength bolt; 6. Steel beam; 7. Beam end connecting plate; 8. One-way bolt; 9. Tie bolt; 10. Outer sleeve; 11. Stiffener plate; 12. Second slot; 13. First slot. Detailed Implementation

[0043] The present invention will be further described below with reference to embodiments:

[0044] Example 1

[0045] like Figures 1-2 As shown, the prefabricated tiered energy-consuming combined node of the present invention includes two square steel pipe columns 1 that are connected to each other, and the two square steel pipe columns 1 are connected to the steel beam 6 through a connecting component.

[0046] The connecting assembly includes an outer sleeve 10, a beam end connecting plate 7, and a stepped energy-dissipating damping device. The outer sleeve 10 is fitted around the outer periphery of two square steel pipe columns 1, and the inner wall of the outer sleeve 10 is adapted to the shape of the square steel pipe columns 1. The contact surface of the two square steel pipe columns 1 is located inside the outer sleeve 10. A beam end connecting plate 7 is provided at one end of the steel beam 6 that connects to the outer sleeve 10. The shape of the beam end connecting plate 7 is adapted to the shape of the contact surface of the outer sleeve 10. The beam end connecting plate 7, the outer sleeve 10, and the square steel pipe columns 1 are connected by one-way bolts 8. The stepped energy-dissipating damping device is placed at the connection between the pipe column and the steel beam 6. The steel beam 6 is connected to the square steel pipe column 1 through the beam end connecting plate 7, the stepped energy-dissipating damping device, and the outer sleeve 10. The stepped energy-dissipating damping device is connected to the flange of the steel beam 6 by high-strength bolts 5. The stepped energy-dissipating damping device is connected to the square steel pipe column 1 by tie bolts 9.

[0047] The stepped energy-dissipating damping device includes a connecting damper 3 and a lug plate 2. The lug plate 2 is placed inside the connecting damper 3. One end of the lug plate 2 is fixedly connected to the square steel pipe column 1. The lug plate 2 is connected to the connecting damper 3 through a shear energy-dissipating rod 4. The connecting holes on the connecting damper 3 are all elongated holes. The connecting damper 3 is connected to the flange of the steel beam 6 through high-strength bolts 5. The connecting damper 3 is connected to the square steel pipe column 1 through tie bolts 9.

[0048] The connecting damper 3 is L-shaped. The first slot 13 is provided on the side of the connecting damper 3 near the square steel column 1. The ear plate 2 and the connecting damper 3 are engaged through the first slot 13.

[0049] Ribs 11 are provided on both sides of the connecting damper 3, and the ear plate 2 is connected to the ribs 11 on the connecting damper 3 through the shear energy dissipation rod 4.

[0050] The upper and lower ends of the beam end connecting plate 7 extend beyond the upper and lower ends of the steel beam 6, and the connecting damper 3 is provided with a second slot 12 that is adapted to the top of the beam end connecting plate 7.

[0051] An installation method for a prefabricated, tiered energy-dissipating composite node, characterized by the following steps:

[0052] S1. Preprocessing, the preprocessing steps include:

[0053] S11. Weld the ear plate 2 to the outer periphery of the square steel tube column 1;

[0054] S12. Weld the beam end connecting plate 7 to one end of the steel beam 6. The upper and lower ends of the beam end connecting plate 7 are set to extend beyond the upper and lower ends of the steel beam 6.

[0055] S2. Assembly of square steel pipe column 1 and steel beam 6. The assembly steps of square steel pipe column 1 and steel beam 6 include:

[0056] S21. Fix the lower square steel pipe column 1, install the connecting damper 3 at the ear plate 2 position, and the first slot 13 on the connecting damper 3 is engaged with the ear plate 2.

[0057] S22. Install the outer sleeve 10, and the bottom of the outer sleeve 10 falls into the second slot 12;

[0058] S23. Install steel beam 6, insert beam end connecting plate 7 from top to bottom into the second slot 12 on connecting damper 3, and connect and fix beam end connecting plate 7, connecting damper 3, outer sleeve 10 to lower square steel pipe column 1.

[0059] S24. Install the upper square steel pipe column 1, with the ear plate 2 abutting against the top of the beam end connecting plate 7 and the outer sleeve 10;

[0060] S25. Install the connecting damper 3 connecting the upper flange of the connecting steel beam 6 and the upper square steel pipe column 1. Place the top of the beam end connecting plate 7 and the top of the outer sleeve 10 in the second slot 12 on the connecting damper 3. Connect and fix the connecting damper 3 to the ear plate 2, the square steel pipe column 1 and the upper flange of the steel beam 6.

[0061] S26. Pour concrete: Pour concrete into the assembled square steel column 1 to make the joint a whole.

[0062] The descriptions of the orientation and relative positional relationships of the structures in this invention, such as front, back, left, right, up, and down, do not constitute a limitation of this invention, but are merely for the convenience of description.

Claims

1. A prefabricated, tiered energy-dissipating composite node, characterized in that, It includes two square steel pipe columns (1) that are connected to each other, and the two square steel pipe columns (1) are connected to the steel beam (6) by a connecting component; The connecting components include an outer sleeve (10), a beam end connecting plate (7), and a stepped energy dissipation damping device. The outer sleeve (10) is fitted around the outer periphery of two square steel pipe columns (1). The contact surfaces of the two square steel pipe columns (1) are placed inside the outer sleeve (10). A beam end connecting plate (7) is provided at one end of the steel beam (6) connected to the outer sleeve (10). The stepped energy dissipation damping device is placed at the connection between the pipe column and the steel beam (6). The steel beam (6) is connected to the square steel pipe column (1) through the beam end connecting plate (7), the stepped energy dissipation damping device, and the outer sleeve (10). The stepped energy dissipation damping device includes a connecting damper (3) and an ear plate (2). The ear plate (2) is placed inside the connecting damper (3). One end of the ear plate (2) is fixed to the square steel pipe column (1). The ear plate (2) is connected to the connecting damper (3) through a shear energy dissipation rod (4). The connecting damper (3) is connected to the flange of the steel beam (6) through high-strength bolts (5). The connecting damper (3) is connected to the square steel pipe column (1) through tie bolts (9). The connecting damper (3) is L-shaped. The first slot (13) is provided on the side of the connecting damper (3) near the square steel column (1). The ear plate (2) and the connecting damper (3) are connected by the first slot (13). Stiffeners (11) are provided on both sides of the connecting damper (3), and the ear plate (2) is connected to the stiffeners (11) on the connecting damper (3) through the shear energy dissipation rod (4); The upper and lower ends of the beam end connecting plate (7) extend beyond the upper and lower ends of the steel beam (6), and the connecting damper (3) is provided with a second slot (12) that is adapted to the top of the beam end connecting plate (7). The connecting holes on the connecting damper (3) are all elongated holes; The ear plate (2) is made of high-strength steel and always maintains elasticity under external load; The shear energy dissipation rod (4) serves as the first-order energy dissipation component, achieving load bearing and energy dissipation through shear deformation; the connecting damper (3) serves as the second-order energy dissipation component, achieving load bearing and energy dissipation through buckling deformation.

2. The prefabricated tiered energy-consuming combined node according to claim 1, characterized in that, The shape of the beam end connecting plate (7) is compatible with the shape of the contact surface of the outer sleeve (10).

3. The prefabricated tiered energy-consuming combined node according to claim 1, characterized in that, The inner wall of the outer sleeve (10) is compatible with the shape of the square steel pipe column (1).

4. The prefabricated tiered energy-consuming combined node according to claim 1, characterized in that, The stepped energy-dissipating damping device is connected to the flange of the steel beam (6) by high-strength bolts (5).

5. The prefabricated tiered energy-consuming combined node according to claim 1, characterized in that, The stepped energy-dissipating damping device is connected to the square steel pipe column (1) by tie bolts (9).

6. An installation method for a prefabricated, tiered energy-dissipating composite node according to any one of claims 1-5, characterized in that, Includes the following steps: S1. Preprocessing, the preprocessing steps include: S11. Weld the ear plate (2) to the outer periphery of the square steel column (1); S12. Weld the beam end connecting plate (7) to one end of the steel beam (6), with the upper and lower ends of the beam end connecting plate (7) extending beyond the upper and lower ends of the steel beam (6); S2. Assembly of square steel pipe column (1) and steel beam (6). The assembly steps of square steel pipe column (1) and steel beam (6) include: S21. Fix the lower square steel pipe column (1), install the connecting damper (3) at the ear plate (2) position, and the first slot (13) on the connecting damper (3) is engaged with the ear plate (2); S22. Install the outer sleeve (10), and the bottom of the outer sleeve (10) falls into the second slot (12); S23. Install the steel beam (6), insert the beam end connecting plate (7) into the second slot (12) on the connecting damper (3) from top to bottom, and connect and fix the beam end connecting plate (7), connecting damper (3), outer sleeve (10) to the lower square steel pipe column (1); S24. Install the upper square steel pipe column (1), with the ear plate (2) abutting against the top of the beam end connecting plate (7) and the outer sleeve (10); S25. Install the connecting damper (3) of the upper flange of the connecting steel beam (6) and the upper square steel column (1). Place the top of the beam end connecting plate (7) and the top of the outer sleeve (10) in the second slot (12) on the connecting damper (3). Connect and fix the connecting damper (3) to the ear plate (2), the square steel column (1) and the upper flange of the steel beam (6). S26. Pour concrete into the assembled square steel column (1) to make the joint a whole.

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