Novel replaceable energy-consuming beam-column joint

Abstract

The invention belongs to the technical field of constructional engineering structures, and particularly relates to a novel replaceable energy-dissipation beam-column joint which comprises two beam-end webs, a column-end web is hinged between the two beam-end webs through a center pin shaft, and energy-dissipation shear discs are arranged between the column-end web and the beam-end web respectively. The energy dissipation shear disc comprises an inner circle and an outer circle, a plurality of second shear keys are evenly distributed between the inner circle and the outer circle, coaming plates are arranged between the constraint steel plate and the column end web plate or the beam end web plate, a core plate is arranged between the two coaming plates, and first shear keys are arranged between grooves of the coaming plates and the core plate. The core plate and the energy dissipation shear plate yield and deform firstly, so that plastic deformation of the structure is mainly concentrated at the design node, the load effect generated by earthquake input is weakened, after damage occurs, the structure function can be quickly recovered by replacing a node damage part, and the post-earthquake recovery time is shortened.

Description

Technical Field

[0001] The invention belongs to the technical field of building engineering structures, and in particular relates to a novel replaceable energy-absorbing beam-column node. Background Art

[0002] With the development of earthquake engineering, the seismic design methods of building structures have been gradually improved, and the main goals of seismic design have gradually evolved from ensuring safety to controlling earthquake losses and ensuring functional recovery. By controlling the strength differences between different components or the failure mode of the same component, unreasonable structural damage mechanisms are avoided, so that the structure has sufficient plastic deformation and energy dissipation capacity. The existing beam-column design nodes are mainly passively designed, mainly through metal dampers and viscoelastic dampers to meet different design requirements. Among them, metal dampers consume energy through plastic deformation of metals, and viscoelastic dampers consume energy through fluid damping. Metal dampers have become the first choice for passive seismic resistance of buildings and structures in terms of energy dissipation capacity, durability, cost-effectiveness and predictable performance. In order to further optimize the metal damper limited by material properties, it has been studied at multiple levels and angles, and optimized and innovated through the introduction of multiple materials and redesign of structural systems. Most of the currently designed replaceable metal energy dissipation dampers focus on the replaceability of the flange components, because the concentrated deformation of the plastic hinge is mainly bending deformation, and the flange components, as the edge components of the energy dissipation node, have the characteristics of large inertia moment, that is, small deformation provides large bending moment. The web is generally used as a shear member, mainly responsible for bearing the vertical bearing capacity. In the current research and innovation, the friction disk is introduced into the web to provide a stable energy dissipation effect, further supplementing the insufficient bending stiffness of the flange and the disadvantage of reduced bearing capacity under large deformation of the node, but a single energy dissipation mechanism can no longer meet the current needs. Summary of the invention

[0003] In view of the problem of the above-mentioned single energy dissipation mechanism, the present invention provides a novel replaceable energy dissipation beam-column node.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] A novel replaceable energy-absorbing beam-column node comprises two beam-end webs, the upper and lower ends of the two beam-end webs are fixedly mounted with beam-end flanges, the outer ends of the beam-end webs are fixedly mounted with beam-end side plates, a column-end web is hingedly connected between the two beam-end webs through a central pin, the upper and lower ends of the column-end webs are fixedly mounted with column-end flanges, the outer ends of the column-end webs are fixedly mounted with column-end side plates, energy-dissipating shear plates are respectively arranged between the column-end webs and the beam-end webs, and the The energy dissipation shear plate includes an inner circle and an outer circle, and a plurality of No. 2 shear keys are evenly distributed between the inner circle and the outer circle. The inner circle is connected to the column end web through a bolt rod, and the outer circle is connected to the beam end web through bolts. Constraint steel plates are arranged on the column end flange and the beam end flange, and a surround is arranged between the constraint steel plate and the column end web or the beam end web. A core plate is arranged between two adjacent surrounds, and the constraint steel plate, the surround and the beam end flange or the column end flange are connected by bolts.

[0006] Furthermore, fishtail limiting sections are provided at both ends of the core plate, and limiting grooves corresponding to the fishtail limiting sections are provided on the enclosure plate.

[0007] Furthermore, the thickness of the enclosure is greater than that of the core plate, so that a gap is left between the restraining steel plate and the core plate, and a wear-resistant rubber layer is provided in the gap to reduce the friction effect generated and realize the sliding mechanism of the core plate.

[0008] Furthermore, a groove is provided between the enclosure and the core plate, a No. 1 shear key is provided in the groove, and two ends of the No. 1 shear key are respectively connected to the enclosure and the core plate.

[0009] Furthermore, a rotation gap is provided between the column end flange and the beam end flange to prevent the column end flange and the beam end flange from squeezing each other when the beam end web and the column end web rotate relative to each other, thereby affecting the rotation ability of the node.

[0010] Compared with the prior art, the present invention has the following advantages:

[0011] 1. The present invention adopts the characteristics of graded energy dissipation and gradual enhancement. During an earthquake, the core plate and the energy dissipation shear plate yield and deform first, so that the plastic deformation of the structure is mainly concentrated at the design nodes, reducing the load effect generated by the earthquake input. With the continuous deformation of shear key No. 1 and shear key No. 2, the fishtail limit section of the core plate is affected by the deformation of shear key No. 1, which will further improve the bearing capacity. After damage occurs, the structural function can be quickly restored by replacing the damaged node parts, reducing the post-earthquake recovery time.

[0012] 2. The present invention adopts a center pin to connect the column end web and the beam end web, ensuring that the device has sufficient rotation ability. At the same time, the center pin also provides sufficient shear resistance. The load on the beam is transmitted through the beam end web, maintaining an elastic state during the entire working process, ensuring the concentration of the damaged part and the replaceability of the damaged parts.

[0013] 3. “Strong shear and weak bending” means that in the process of building structure design, more emphasis should be placed on shear resistance when the structure is subjected to external load forces, while the bending resistance should be relatively weakened to ensure the safety and stability of the entire structure. The present invention introduces energy dissipation shear plates and core plates to provide bending resistance while ensuring that the vertical shear force is not weakened, thereby ensuring the realization of the “strong shear and weak bending” mechanism.

[0014] 4. The present invention plays an energy dissipation role through the core plate and the energy dissipation shear plate, and plays a connecting role through the column end web, the beam end web and the center pin. The energy dissipation part and the connecting part are interrelated and independent of each other; they are interrelated because the energy dissipation part requires the assembly and cooperation of the connecting part, and they are independent of each other because the energy dissipation part, as the main deforming component, is responsible for absorbing seismic force. If the energy dissipation part stops working, the connecting part still has the function of "keeping the connection" and will not cause structural collapse. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the present invention;

[0016] Figure 2 This is a schematic diagram of a replaceable node structure of the present invention;

[0017] Figure 3 It is a structural schematic diagram of the web plate at the end of the beam of the present invention;

[0018] Figure 4 It is a structural schematic diagram of the beam end flange of the present invention;

[0019] Figure 5 It is a structural schematic diagram of the beam end side plate of the present invention;

[0020] Figure 6 It is a structural schematic diagram of the column end web of the present invention;

[0021] Figure 7 It is a structural schematic diagram of the column end flange of the present invention;

[0022] Figure 8 It is a structural schematic diagram of the column end side plate of the present invention;

[0023] Fig. 9 is a cross-sectional view of the present invention;

[0024] Fig.10 It is a structural schematic diagram of the core plate and the enclosure plate of the present invention;

[0025] Fig.11 It is a structural schematic diagram of the energy dissipation shear disk of the present invention;

[0026] In the figure, the web plate 1 at the beam end, the flange 2 at the beam end, the side plate 3 at the beam end, the web plate 4 at the column end, the flange 5 at the column end, the side plate 6 at the column end, the energy dissipation shear plate 7, the inner circle 8, the outer circle 9, the second shear key 10, the restraining steel plate 11, the surrounding plate 12, the core plate 13, the limiting groove 14, the number one shear key 15, the groove 16, the rotation gap 17, and the center pin 18. DETAILED DESCRIPTION

[0027] In order to further illustrate the technical solution of the present invention, the present invention is further described below through embodiments.

[0028] 1. If Figures 1 to 9 As shown, a novel replaceable energy-absorbing beam-column node comprises two beam end webs 1, the upper and lower ends of the two beam end webs 1 are fixedly mounted with beam end flanges 2, the outer ends of the beam end webs 1 are fixedly mounted with beam end side plates 3, a column end web 4 is hinged between the two beam end webs 1 through a center pin, the upper and lower ends of the column end webs 4 are fixedly mounted with column end flanges 5, a rotation gap 17 is provided between the column end flanges 5 and the beam end flanges 2 to prevent the column end flanges 5 and the beam end flanges 2 from being squeezed against each other when the beam end webs 1 and the column end webs 4 rotate relative to each other, thereby affecting the rotation capacity of the node, and the outer ends of the column end webs 4 are fixedly mounted with column end side plates 6, as shown in FIG. Fig. 9 and Fig.11 As shown, energy dissipation shear plates 7 are respectively arranged between the column end web 4 and the beam end web 1, and the energy dissipation shear plates 7 include an inner circle 8 and an outer circle 9, and a plurality of No. 2 shear keys 10 are evenly distributed between the inner circle 8 and the outer circle 9. The inner circle 8 is connected to the column end web 4 through a bolt rod, and the outer circle 9 is connected to the beam end web 1 through a bolt. Constraint steel plates 11 are arranged on the column end flange 5 and the beam end flange 2, as shown in FIG. Fig. 9 and Fig.10As shown, a shroud 12 is arranged between the restraining steel plate 11 and the column end web 4 and the beam end web 1, a core plate 13 is arranged between two adjacent shrouds 12, both ends of the core plate 13 are provided with fishtail limit sections, and a limit groove 14 corresponding to the fishtail limit section is arranged on the shroud 12, the restraining steel plate 11, the shroud 12 and the beam end flange 2 or the column end flange 5 are connected by bolts, a groove 16 is opened between the shroud 12 and the core plate 13, a No. 1 shear key 15 is arranged in the groove 16, and the two ends of the No. 1 shear key 15 are respectively connected to the shroud 12 and the core plate 13, The thickness of the enclosure 12 is greater than that of the core plate 13, so that a gap is left between the constraint steel plate 11 and the core plate 13. A wear-resistant rubber layer is arranged in the gap to reduce the friction effect and realize the sliding mechanism of the core plate 13. The present invention adopts the characteristics of graded energy dissipation and gradual enhancement. During an earthquake, the core plate 13 and the energy dissipation shear plate 7 yield and deform first, so that the plastic deformation of the structure is mainly concentrated at the design node, weakening the load effect generated by the earthquake input. With the continuous deformation of the No. 1 shear key 15 and the No. 2 shear key 10, the fishtail limit section of the core plate 13 reaches the displacement and the bearing capacity will be further improved. After the damage occurs, the structural function can be quickly restored by replacing the node damaged parts, reducing the post-earthquake recovery time.

[0029] The above shows and describes the main features and advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes that fall within the meaning and scope of the equivalent elements of the claims are included in the present invention.

[0030] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A new type of replaceable energy-absorbing beam-column node, characterized in that: The invention comprises two beam end webs (1), wherein the upper and lower ends of the two beam end webs (1) are commonly fixedly mounted with beam end flanges (2), the outer ends of the beam end webs (1) are fixedly mounted with beam end side plates (3), a column end web (4) is hingedly connected between the two beam end webs (1) via a center pin (18), the upper and lower ends of the column end webs (4) are fixedly mounted with column end flanges (5), the outer ends of the column end webs (4) are fixedly mounted with column end side plates (6), and energy dissipation shear plates (7) are respectively arranged between the column end webs (4) and the beam end webs (1), wherein the energy dissipation shear plates (7) comprise an inner circle (8) and an outer circle (9), and the energy dissipation shear plates (7) are respectively arranged between the column end webs (4) and the beam end webs (1). A plurality of No. 2 shear keys (10) are evenly distributed between the inner circle (8) and the outer circle (9); the inner circle (8) is connected to the column end web (4) via bolt rods; the outer circle (9) is connected to the beam end web (1) via bolts; a restraining steel plate (11) is provided on the column end flange (5) and the beam end flange (2); a shroud (12) is provided between the restraining steel plate (11) and the column end web (4) or the beam end web (1); a core plate (13) is provided between two adjacent shrouds (12); and the restraining steel plate (11), the shroud (12) and the beam end flange (2) or the column end flange (5) are connected via bolts.

2. A novel replaceable energy-absorbing beam-column node according to claim 1, characterized in that: Both ends of the core plate (13) are provided with fishtail limiting sections, and the enclosure plate (12) is provided with limiting grooves (14) corresponding to the fishtail limiting sections.

3. A novel replaceable energy-absorbing beam-column node according to claim 1, characterized in that: The thickness of the enclosure plate (12) is greater than that of the core plate (13), so that a gap is left between the restraining steel plate (11) and the core plate (13). A wear-resistant rubber layer is arranged in the gap to reduce the friction effect generated and realize the sliding mechanism of the core plate (13).

4. A novel replaceable energy-absorbing beam-column node according to claim 1, characterized in that: A groove (16) is provided between the enclosure (12) and the core plate (13), a first shear key (15) is provided in the groove (16), and two ends of the first shear key (15) are respectively connected to the enclosure (12) and the core plate (13).

5. The novel replaceable energy-absorbing beam-column node according to claim 1 is characterized in that: A rotation gap (17) is provided between the column end flange (5) and the beam end flange (2) to prevent the column end flange (5) and the beam end flange (2) from squeezing each other when the beam end web (1) and the column end web (4) rotate relative to each other, thereby affecting the rotation capacity of the node.

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