Flange weakening type steel beam joint for guaranteeing functions of strong column and weak beam of steel structure

Abstract

The utility model discloses a flange weakening type steel beam node for guaranteeing functions of a strong column and a weak beam of a steel structure, which belongs to the technical field of steel structures and comprises a steel beam and a steel column, the steel beam and the steel column are connected through an energy consumption connecting beam, the energy consumption connecting beam comprises a rib plate, an upper wing plate and a lower wing plate, and the upper wing plate and the lower wing plate are symmetrically fixed at the upper end and the lower end of the rib plate. The upper wing plate and the lower wing plate are each provided with two rows of gradually-changed-length through holes. The two rows of gradually-changed long through holes are formed in the wing plate and the lower wing plate, the hole diameters are gradually changed from small to large from the end close to the steel column to the other end, the weakening depths of the upper wing plate and the lower wing plate are gradually increased, under the action of dynamic loads such as earthquakes, when the joint deforms relatively, the plastic hinge stably moves outwards, the anti-seismic performance of the structure is improved, and the service life of the joint is prolonged. And a strong column and a weak beam can be realized.

Description

Technical Field

[0001] This utility model relates to the field of steel structure technology, specifically to a flange-weakening steel beam node that ensures the strong column-weak beam function of a steel structure. Background Technology

[0002] In steel structure buildings, the strong column-weak beam design is an important seismic design concept. It requires that the load-bearing capacity of the structural columns be greater than that of the beams, ensuring that under dynamic loads such as earthquakes, the columns do not fail before the beams, thus protecting the safety of the entire structure and avoiding the serious consequence of overall collapse. However, achieving the strong column-weak beam design goal in practical engineering applications faces many challenges.

[0003] Traditional methods of connecting steel beams and columns often make it difficult to precisely control the strength relationship between them. Under seismic loads, beam ends may fail prematurely due to the formation of plastic hinges, failing to effectively dissipate seismic energy and causing the columns to bear excessive loads and fail. Utility Model Content

[0004] To address the aforementioned technical shortcomings, the purpose of this utility model is to provide a flange-weakening steel beam joint that ensures the strong column-weak beam function of the steel structure, thereby solving the problem of uncontrollable plastic hinge position in existing steel beam joints.

[0005] To solve the above-mentioned technical problems, this utility model adopts the following technical solution: This utility model provides a flange-weakening steel beam node that ensures the strong column-weak beam function of a steel structure, including a steel beam and a steel column, wherein the steel beam and the steel column are connected by an energy-dissipating connecting beam, and the energy-dissipating connecting beam includes:

[0006] Rib plate, one end of which is fixedly connected to the outer side of the flange of the steel column, and the other end of which is fixedly connected to the web of the steel beam;

[0007] The upper and lower wing plates are symmetrically fixed at the upper and lower ends of the rib plate. Both the upper and lower wing plates are provided with two rows of gradually increasing through holes. The diameter of the gradually increasing through holes gradually increases from one end near the steel column to the other end.

[0008] Preferably, the upper flange is bolted to one outer angle steel and two inner angle steels at one end near the steel column. The outer angle steel is fixed on the side of the upper flange away from the rib, and the inner angle steels are fixed on the side of the upper flange near the rib. Both the outer angle steel and the inner angle steel are bolted to the flange of the steel column.

[0009] Preferably, the outer angle steel is fixed with stiffening plates, and the length of the two plates of the outer angle steel is greater than the length of the two plates of the inner angle steel.

[0010] Preferably, four gradually elongated through holes are provided on the upper wing plate. The four gradually elongated through holes are divided into two symmetrical rows. The two gradually elongated through holes in each row are symmetrical and the larger diameter ends are close to each other.

[0011] Preferably, an energy-dissipating plate is provided on the lower surface of the upper wing plate. The thickness of the energy-dissipating plate is less than that of the upper wing plate. Two long slots are formed on the energy-dissipating plate. The energy-dissipating plate is connected to the upper wing plate by bolts passing through the long slots and gradually elongated through holes.

[0012] Preferably, the end of the rib plate near the steel beam is coplanar with the web of the steel beam, and the rib plate is bolted to a first connecting plate, which is bolted to the web of the steel beam.

[0013] Preferably, the upper wing plate is bolted to a second connecting plate, and the second connecting plate is bolted to the upper edge plate of the steel beam.

[0014] Preferably, the rib plate has a hexagonal through hole, which is located near the end of the gradually elongated through hole with a larger diameter.

[0015] Preferably, the upper wing plate has a central arc-shaped notch at its edge away from the rib plate, and the upper wing plates at both ends of the central arc-shaped notch have edge arc-shaped notches, with the central arc-shaped notch being closer to the end with the larger diameter of the gradually elongated through hole.

[0016] Preferably, two angle steels are provided at one end of the rib plate near the steel column, and the two angle steels are fixedly connected to the rib plate and the flange of the steel column by bolts.

[0017] The beneficial effects of this utility model are as follows:

[0018] This invention connects the steel beam and steel column using an energy-dissipating connecting beam. One end of the rib plate is fixed to the outer flange of the steel column, and the other end is fixed to the web of the steel beam. Upper and lower flanges are symmetrically fixed to the upper and lower ends of the rib plate. This provides a stable and reasonable force transmission path for the joint, enabling effective force transfer between the steel beam and steel column and ensuring the overall structural stability. The end of the upper flange closest to the steel column is bolted to an outer angle steel and two inner angle steels, both of which are bolted to the flange of the steel column. This enhances the connection between the steel beam and steel column at the joint. The strength is improved, enhancing the load-bearing capacity of the joint; the two rows of gradually changing long through holes in the upper and lower flanges, with the hole diameter gradually increasing from one end near the steel column to the other, and the weakening depth of the upper and lower flanges gradually increasing, ensure that the plastic hinge moves outward stably when the joint undergoes relative deformation under dynamic loads such as earthquakes, improving the seismic performance of the structure and helping to achieve strong column-weak beam; by setting energy dissipation plates, when the upper flange deforms, the bolts slide in the long grooves, dissipating energy through friction and deformation, thus playing a certain protective role. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 A perspective view of a flange-weakening steel beam node that ensures the strong column-weak beam function of a steel structure, as provided in Embodiment 1 of this utility model.

[0021] Figure 2 A perspective view of a flange-weakening steel beam node that ensures the strong column-weak beam function of a steel structure, provided in Embodiment 2 of this utility model.

[0022] Figure 3 This is a top view of a flange-weakening steel beam node that ensures the strong column-weak beam function of a steel structure, as provided in Embodiment 2 of this utility model.

[0023] Figure 4 A perspective view of a flange-weakening steel beam node that ensures the strong column-weak beam function of a steel structure, provided in Embodiment 3 of this utility model.

[0024] Figure 5 This is a schematic diagram illustrating the cooperation between the energy-dissipating connecting beam of the flange-weakening steel beam node and the steel beam and steel column, which is provided in Embodiment 3 of this utility model to ensure the function of strong column and weak beam in steel structure.

[0025] Figure 6 for Figure 5 A magnified view of a portion of point A in the middle.

[0026] Explanation of reference numerals in the attached figures:

[0027] 1. Steel beam; 11. Web plate; 12. Upper flange plate; 2. Steel column; 21. Flange; 3. Energy dissipation connecting beam; 31. Rib plate; 311. First connecting plate; 312. Second connecting plate; 313. Hexagonal through hole; 32. Upper flange plate; 321. Outer angle steel; 3211. Rib plate; 322. Inner angle steel; 323. Central arc-shaped notch; 324. Edge arc-shaped notch; 33. Lower flange plate; 34. Gradually changing long through hole; 35. Energy dissipation plate; 351. Long slot. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] Example 1:

[0030] like Figure 1 As shown in Embodiment 1 of this utility model, the flange 21 weakened steel beam 1 node that ensures the strong column-weak beam function of the steel structure mainly includes a steel beam 1, a steel column 2, and an energy-dissipating connecting beam 3 connecting the two. The energy-dissipating connecting beam 3 specifically includes a rib plate 31, an upper flange plate 32, and a lower flange plate 33. The steel beam 1 includes a web plate 11 and an upper edge plate 12 and a lower edge plate respectively fixed to the upper and lower sides of the web plate 11.

[0031] Two angle steels are fixed to one end of the rib plate 31 by high-strength bolts. These two angle steels are fixedly connected to the outer side of the flange 21 of the steel column 2 by high-strength bolts. The other end of the rib plate 31 is fixed to a first connecting plate 311 by high-strength bolts. The end of the rib plate 31 closest to the steel beam 1 is coplanar with the web 11 of the steel beam 1. The first connecting plate 311 is also fixedly connected to the web 11 of the steel beam 1 by high-strength bolts. This makes the rib plate 31 play a key bridging role between the steel beam 1 and the steel column 2, providing a stable and reasonable force transmission path for the node, effectively transferring the force between the steel beam 1 and the steel column 2, and ensuring the overall stability of the structure.

[0032] like Figure 1 As shown, the upper flange 32 and lower flange 33 are symmetrically fixed to the upper and lower ends of the rib 31. Both the upper flange 32 and lower flange 33 have two rows of gradually elongated through holes 34, located on opposite sides of the rib 31. The diameter of the gradually elongated through holes 34 gradually increases from one end near the steel column 2 to the other. This gradual change causes the weakening depth of the upper flange 32 and lower flange 33 to gradually increase, and the structural strength to gradually decrease. Under dynamic loads such as earthquakes, when relative deformation occurs at the joints, the plastic hinge will stably move outward, thereby improving the seismic performance of the steel column 2 and helping to achieve the design goal of strong column-weak beam.

[0033] The upper flange 32, near the steel column 2, is connected to an outer angle steel 321 and two inner angle steels 322 by high-strength bolts. The outer angle steel 321 is fixed to the side of the upper flange 32 away from the rib plate 31 and bolted to the flange 21 of the steel column 2, while the inner angle steels 322 are fixed to the side of the upper flange 32 near the rib plate 31 and bolted to the flange 21 of the steel column 2. A stiffening plate 3211 is also fixed to the outer angle steel 321. This multiple connection method greatly enhances the connection strength between the steel beam 1 and the steel column 2 at the node, improving the node's load-bearing capacity. A second connecting plate 312 is bolted to the end of the upper flange 32 away from the steel column 2, and the second connecting plate 312 is bolted to the upper edge plate 12 of the steel beam 1. The second connecting plate 312 strengthens the connection between the upper flange 32 and the upper edge plate 12 of the steel beam 1, allowing the node to better transfer force to the steel beam 1 when under stress, thus improving the overall performance of the node.

[0034] A hexagonal through-hole 313 is provided on the rib plate 31, with the hexagonal through-hole 313 located near the end of the gradually elongated through-hole 34 with a larger diameter. The hexagonal through-hole 313 can reduce the weight of the node to a certain extent, thereby reducing the self-weight of the structure. On the other hand, when the node is subjected to stress and deformation, the hexagonal through-hole 313 can guide the deformation direction, optimize the stress performance of the node, and enable the node to distribute stress more rationally when under stress.

[0035] like Figure 1 As shown, the upper flange 32 has a central arc-shaped notch 323 at its edge away from the rib 31, and edge arc-shaped notches 324 are formed on the upper flange 32 at both ends of the central arc-shaped notch 323. By setting the notches, the upper flange 32 and the lower flange 33 are weakened, and the plastic yield zone is expanded. The central arc-shaped notch 323 is close to the end with the larger diameter of the gradually elongated through hole 34. The setting of these arc-shaped notches can further optimize the stress distribution of the node, reduce stress concentration when the node is under stress, and improve the load-bearing capacity and fatigue resistance of the node.

[0036] Example 2:

[0037] This second embodiment is based on the first embodiment, such as... Figure 2 and Figure 3 As shown, the structure of the upper wing plate 32 has been further optimized. In this embodiment, four gradually elongated through holes 34 are provided on the upper wing plate 32. The four gradually elongated through holes 34 are arranged in two symmetrical rows, and the two gradually elongated through holes 34 in each row are symmetrical and the ends with the larger hole diameters are close to each other. This layout allows the stress at the nodes to be released at the gradually elongated through holes 34 when subjected to force.

[0038] Example 3:

[0039] Based on Embodiment 1 and Embodiment 2, as Figures 4 to 6 As shown, an energy-dissipating plate 35 is provided on the lower surface of the upper flange 32, and the thickness of the energy-dissipating plate 35 is less than the thickness of the upper flange 32. Two elongated slots 351 are formed on the energy-dissipating plate 35, and the energy-dissipating plate 35 is connected to the upper flange 32 by bolts passing through the elongated slots 351 and gradually elongated through holes 34. When the node deforms under dynamic loads such as earthquakes, the upper flange 32 will deform. At this time, the bolts will slide in the elongated slots 351, dissipating energy through friction and deformation, providing a certain degree of protection for the upper flange 32 and the entire node, further enhancing the energy dissipation capacity of the node, and improving the seismic performance of the structure.

[0040] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A flange-weakened steel beam joint for guaranteeing the function of strong column and weak beam of steel structure, comprising a steel beam and a steel column, characterized in that, The steel beam and the steel column are connected through a energy dissipation connecting beam, and the energy dissipation connecting beam comprises: A rib plate, one end of the rib plate is fixedly connected with the outer side of the flange of the steel column, and the other end is fixedly connected with the web of the steel beam; Upper and lower flanges, the upper and lower flanges are symmetrically fixed at the upper and lower ends of the rib plate, and the upper and lower flanges are both provided with two rows of gradually long through holes, and the hole diameter of the gradually long through hole gradually changes from small to large from one end close to the steel column to the other end.

2. The flange-weakened steel beam joint for securing a strong column and weak beam function of a steel structure according to claim 1, characterized in that, The upper flange is bolted with an outer angle steel and two inner angle steels at one end close to the steel column, the outer angle steel is fixed on the side of the upper flange away from the rib plate, and the inner angle steels are fixed on the side of the upper flange close to the rib plate; the outer angle steel and the inner angle steels are both bolted with the flange of the steel column.

3. The flange-weakened steel beam joint for securing a strong column and weak beam function of steel structures according to claim 2, characterized in that, The outer angle steel is fixed with a rib plate, and the length of the two plate bodies of the outer angle steel is greater than that of the two plate bodies of the inner angle steel.

4. The flange-weakened steel beam joint for securing a strong column and weak beam function of a steel structure according to claim 1, characterized in that, The upper flange is bolted with an outer angle steel and two inner angle steels at one end close to the steel column, the outer angle steel is fixed on the side of the upper flange away from the rib plate, and the inner angle steels are fixed on the side of the upper flange close to the rib plate; the outer angle steel and the inner angle steels are both bolted with the flange of the steel column.

5. The flange-weakened steel beam joint for securing a strong column and weak beam function of a steel structure according to claim 4, characterized in that, The outer angle steel is fixed with a rib plate, and the length of the two plate bodies of the outer angle steel is greater than that of the two plate bodies of the inner angle steel.

6. The flange-weakened steel beam joint for securing a strong column and weak beam function of a steel structure according to claim 1, wherein The upper flange is bolted with an outer angle steel and two inner angle steels at one end close to the steel column, the outer angle steel is fixed on the side of the upper flange away from the rib plate, and the inner angle steels are fixed on the side of the upper flange close to the rib plate; the outer angle steel and the inner angle steels are both bolted with the flange of the steel column.

7. The flange-weakened steel beam joint for securing a strong column and weak beam function of a steel structure according to claim 1, characterized in that, The outer angle steel is fixed with a rib plate, and the length of the two plate bodies of the outer angle steel is greater than that of the two plate bodies of the inner angle steel.

8. The flange-weakened steel beam joint for securing a strong column and weak beam function of a steel structure according to claim 1, characterized in that, The upper flange is bolted with an outer angle steel and two inner angle steels at one end close to the steel column, the outer angle steel is fixed on the side of the upper flange away from the rib plate, and the inner angle steels are fixed on the side of the upper flange close to the rib plate; the outer angle steel and the inner angle steels are both bolted with the flange of the steel column.

9. The flange-weakened steel beam joint for securing a strong column and weak beam function of a steel structure according to claim 1, wherein The outer angle steel is fixed with a rib plate, and the length of the two plate bodies of the outer angle steel is greater than that of the two plate bodies of the inner angle steel.

10. The flange-weakened steel beam joint for securing a strong column and weak beam function of a steel structure according to claim 1, wherein The upper flange is bolted with an outer angle steel and two inner angle steels at one end close to the steel column, the outer angle steel is fixed on the side of the upper flange away from the rib plate, and the inner angle steels are fixed on the side of the upper flange close to the rib plate; the outer angle steel and the inner angle steels are both bolted with the flange of the steel column. The outer angle steel is fixed with a rib plate, and the length of the two plate bodies of the outer angle steel is greater than that of the two plate bodies of the inner angle steel.

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