A shear resistant precast beam connection assembly

Abstract

The utility model relates to a kind of shear-resistant precast beam connecting assembly. End connector has two, respectively with the end of two precast beams to be connected, including rectangular steel plate, rectangular steel plate is equipped with multiple through hole for the steel bar of precast beam to pass through;Inner rigid connecting piece includes four, be made of rigid metal, middle is flat plate, two ends are symmetrical vertical flip along to constitute inner connecting flange, connect with two end connectors respectively by bolt;Outer flexible connecting piece includes four, be made of flexible metal, middle is flat plate, two ends are symmetrical vertical flip along to constitute outer connecting flange, connect with two end connectors respectively by bolt;Four inner rigid connecting piece and outer rigid connecting piece enclose double-layer cuboid structure, inner rigid connecting piece and outer flexible connecting piece are set one by one, inner rigid connecting piece and outer flexible connecting piece are filled with lubricating grease between. Through the synergistic effect of inner layer rigid support and outer layer flexible energy consumption, improve the anti-seismic performance and simplify construction process.

Description

Technical Field

[0001] This utility model belongs to the field of building structure connection technology, specifically relating to a shear-resistant precast beam connection component that achieves the synergistic effect of rigid support and flexible seismic resistance through biomimetic design. Background Technology

[0002] The existing precast beam connection technology has the following drawbacks:

[0003] 1. Insufficient seismic performance: Traditional rigid connections (such as studs and welding) are prone to brittle failure during earthquakes and cannot effectively dissipate energy;

[0004] 2. Construction complexity: Precise control of rebar alignment and grout density is required, resulting in a high degree of reliance on manual labor;

[0005] 3. Difficult to maintain: Defects in hidden works (such as grouting voids) are difficult to detect, resulting in high maintenance costs in the later stages.

[0006] In existing technologies, the patent uses a channel-shaped precast beam shell connected to an angle steel boss, but this does not solve the seismic resistance problem; the patent enhances shear resistance through interlocking stripes, but still relies on a rigid connection. Therefore, there is an urgent need for a connection component that combines rigid support with flexible energy dissipation. Utility Model Content

[0007] The purpose of this invention is to provide a shear-resistant precast beam connection component that improves seismic performance and simplifies the construction process through the synergistic effect of inner rigid support and outer flexible energy dissipation.

[0008] The technical solution of this utility model is as follows: A shear-resistant precast beam connection assembly includes:

[0009] There are two end connectors, which are used to connect to the ends of the two precast beams to be connected. They include rectangular steel plates with multiple through holes for the reinforcing bars of the precast beams to pass through.

[0010] The internal rigid connectors consist of four parts, made of rigid metal, with a flat plate in the middle and symmetrical vertical flanges at both ends to form an internal connecting flange, which is connected to the two end connectors by bolts respectively.

[0011] The external flexible connectors consist of four pieces made of flexible metal, with a flat plate in the middle and symmetrical vertical flanges at both ends to form an external connecting flange, which is connected to the two end connectors by bolts respectively.

[0012] Four inner rigid connectors and an outer rigid connector form a double-layered cuboid structure. The inner rigid connectors and the outer flexible connectors are fitted together one by one, and grease is filled between the inner rigid connectors and the outer flexible connectors.

[0013] Based on the above scheme, the following improvements are made: a reinforcing rib is vertically arranged on the inner side of the internal rigid connector.

[0014] Based on the above scheme, the following improvements are made: the material of the internal rigid connector is low alloy high strength steel, weathering steel, or ultra-high strength steel.

[0015] Based on the above scheme, the following improvements are made: the material of the internal rigid connector is Q355B, Q355NH, or DH890.

[0016] Based on the above scheme, the following improvements are made: the material of the external flexible connector is austenitic stainless steel, duplex stainless steel, tin bronze, or nickel-titanium shape memory alloy.

[0017] Based on the above scheme, further improvements are made as follows: the material grade of the external flexible connector is 316L, 2205, QSn6.5-0.1, or NiTiNOL.

[0018] Based on the above scheme, the following improvements are made: both the inner rigid connector and the outer flexible connector are made by bending the corresponding metal plates, and the bending radius of the outer flexible connector is larger than that of the inner rigid connector.

[0019] Based on the above scheme, the following improvements are made: one side of the end connector has an auxiliary connecting sleeve that is adapted to the shape of the precast beam, which is used to fit onto the end of the precast beam.

[0020] Based on the above scheme, the following improvement is made: the three components are connected synchronously by simultaneously passing bolts through the end connector, the inner rigid connector, and the outer flexible connector.

[0021] The beneficial effects of this utility model are as follows: In use, the shear-resistant precast beam connection assembly of this utility model allows the corresponding precast beam reinforcing bars to pass through their through holes in the two end connectors. The reinforcing bars are then bent or cut and welded to tightly connect the end connectors to the reinforcing bars of the precast beam as a whole. Next, four inner rigid connectors are sequentially connected to the two end connectors to form a cuboid structure, achieving the initial connection between the two precast beams. Then, lubricating grease, preferably high-viscosity grease, is evenly applied to the outer surfaces of the four inner rigid connectors. Finally, the four outer flexible connectors are sequentially connected to the end connectors. Before connecting the outer flexible connector, a layer of grease is evenly applied to the inner surface of the outer flexible connector between the two end connectors. The grease then forms a lubricating film between the inner rigid connector and the outer flexible connector. When subjected to external forces such as earthquakes or typhoons, the inner rigid connector plays a primary load-bearing and supporting role, while the outer flexible connector deforms to dissipate vibrational energy. During this vibration process, the grease acts as a lubricant, similar to the rigid trunk, flexible bark, and smooth sap between the trunk and bark of a large tree. This is the principle behind a tree standing firm in strong winds. Therefore, the complementary rigid-flexible design of the inner and outer metal layers in this application solves the contradiction of traditional connectors being "brittle when rigid and weak when flexible." By reducing the interlayer friction coefficient through the grease layer (which can be reduced to below 0.05), a dynamic balance between seismic energy dissipation and load-bearing rigidity is achieved. This application is the first to apply a biomimetic layered structure of "rigid inner layer + flexible outer layer" to precast beam connection components, forming a gradient shear resistance mechanism (similar to the stress dispersion principle of tree rings). This application has at least the following beneficial effects:

[0022] 1. Improved seismic performance: The outer flexible metal dissipates seismic energy through yielding deformation. Meanwhile, the inner rigid metal has strong rigid support capacity, which will not cause deformation or swaying of the precast beam. In addition, the grease between the inner and outer layers can ensure that the friction between the inner and outer layers is small, reducing the amount of wear between them during vibration.

[0023] 2. Ease of construction: The self-lubricating properties of the grease allow for an installation deviation of ±3mm, reducing the amount of manual leveling work; the connecting components can be directly bolted together, and disassembly and assembly are also relatively convenient and quick. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the connection state of one embodiment of the shear-resistant precast beam connection assembly of this utility model;

[0025] Figure 2 for Figure 1 A magnified view of a section at point A in the middle;

[0026] Figure 3This is a three-dimensional structural diagram of another embodiment of the shear-resistant precast beam connection component of this utility model (omitting the end connector at one end, the two external flexible connectors, and the bolts).

[0027] Figure 4 for Figure 3 Rear axonometric view;

[0028] Figure 5 for Figure 3 A three-dimensional view after slicing;

[0029] Figure 6 A perspective view of an internally rigid connector with double stiffeners;

[0030] Figure 7 A perspective view of an internally rigid connector with a single reinforcing rib.

[0031] Figure 8 A perspective view of an external flexible connector;

[0032] In the diagram: 1-Precast beam, 11-Reinforcing bar, 2-End connector, 21-Rectangular steel plate, 211-Perforation, 212-Connecting hole, 22-Auxiliary connecting sleeve, 3-Inner rigid connector, 31-Inner connecting flange, 32-Reinforcing rib plate, 4-Outer flexible connector, 41-Outer connecting flange, 5-Bolt. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present utility model and are not intended to limit the present utility model; that is, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The components of the embodiments of the present utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0034] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0035] It should be noted that relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0036] The features and performance of this utility model will be further described in detail below with reference to the embodiments.

[0037] One embodiment of the shear-resistant precast beam connection assembly of this utility model is as follows: Figure 1-2 As shown, a shear-resistant precast beam 1 connection assembly includes:

[0038] There are two end connectors 2, which are used to connect to the ends of the two precast beams 1 to be connected. They include a rectangular steel plate 21, which has multiple through holes 211 for the reinforcing bars of the precast beams 1 to pass through.

[0039] The inner rigid connector 3 includes four parts, which are made of rigid metal. The middle part is a flat plate and the two ends are symmetrical vertical flanges to form an inner connecting flange 31. They are connected to the two end connectors 2 by bolts respectively.

[0040] The external flexible connector 4, comprising four, is made of flexible metal, with a flat plate in the middle and symmetrical vertical flanges at both ends to form an external connecting flange 41, which is connected to the two end connectors 2 respectively by bolts.

[0041] Four inner rigid connectors 3 and outer rigid connectors form a double-layered cuboid structure. The inner rigid connectors 3 and outer flexible connectors 4 are fitted together one by one, and grease is filled between the inner rigid connectors 3 and outer flexible connectors 4.

[0042] The inner rigid connector 3 is made of low-alloy high-strength steel, weather-resistant steel, or ultra-high-strength steel. The material grade of the inner rigid connector 3 is Q355B, Q355NH, or DH890. The outer flexible connector 4 is made of austenitic stainless steel, duplex stainless steel, tin bronze, or nickel-titanium shape memory alloy. The material grade of the outer flexible connector 4 is 316L, 2205, QSn6.5-0.1, or NiTiNOL.

[0043] Both the inner rigid connector 3 and the outer flexible connector 4 are formed by bending corresponding metal plates, with the bending radius of the outer flexible connector 4 being larger than that of the inner rigid connector 3. One side of the end connector 2 has an auxiliary connecting sleeve 22 adapted to the shape of the precast beam 1, used to fit onto the end of the precast beam 1. Bolts are simultaneously passed through the end connector 2, the inner rigid connector 3, and the outer flexible connector 4 to connect them synchronously.

[0044] In other embodiments, such as Figure 3-8 As shown, a reinforcing rib plate 32 is vertically arranged on the inner side of the inner rigid connector 3.

[0045] In the use of the shear-resistant precast beam 1 connection assembly of this utility model, the two end connectors 2 respectively allow the corresponding reinforcing bars of the precast beam 1 to pass through their through holes 211. Then, the reinforcing bars are bent or cut and then welded to tightly connect the end connectors 2 and the reinforcing bars of the precast beam 1 into a whole. Then, four inner rigid connectors 3 are connected to the two end connectors 2 in sequence to form a cuboid structure, realizing the initial connection of the two precast beams 1. Then, lubricating grease, preferably high viscosity lubricating grease, is evenly applied to the outer surface of the four inner rigid connectors 3. Then, four outer flexible connectors 4 are connected to the two end connectors in sequence. Before connecting the outer flexible connector 4, a layer of grease is uniformly applied to the inner surface of the outer flexible connector 4 between the end connectors 2. The grease then forms a lubricating film between the inner rigid connector 3 and the outer flexible connector 4. When subjected to external forces such as earthquakes or typhoons, the inner rigid connector 3 plays a primary supporting role, while the outer flexible connector 4 deforms to dissipate vibration energy. During this vibration process, the grease acts as a lubricant, similar to the rigid trunk, flexible bark, and smooth sap between the trunk and bark of a large tree. This is the principle behind a tree standing firm in strong winds. Therefore, the complementary rigid-flexible design of the inner and outer metal layers in this application solves the contradiction of traditional connectors being "brittle when rigid and weak when flexible." By reducing the interlayer friction coefficient through the grease layer (which can be reduced to below 0.05), a dynamic balance between seismic energy dissipation and load-bearing rigidity is achieved. This application is the first to apply a biomimetic layered structure of "rigid inner layer + flexible outer layer" to the precast beam 1 connection component, forming a gradient shear resistance mechanism (similar to the stress dispersion principle of tree rings). This application has at least the following beneficial effects:

[0046] 1. Improved seismic performance: The outer flexible metal dissipates seismic energy through yielding deformation. Meanwhile, the inner rigid metal has strong rigid support capacity, which will not cause deformation or swaying of the precast beam 1. In addition, the grease between the inner and outer layers can ensure that the friction between the inner and outer layers is small, reducing the amount of wear between them during vibration.

[0047] 2. Ease of construction: The self-lubricating properties of the grease allow for an installation deviation of ±3mm, reducing the amount of manual leveling work; the connecting components can be directly bolted together, and disassembly and assembly are also relatively convenient and quick.

[0048] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. The patent protection scope of the present utility model shall be determined by the claims. Similarly, any equivalent structural changes made based on the description and drawings of the present utility model shall also be included within the protection scope of the present utility model.

Claims

1. A shear-resistant precast beam connection assembly, characterized in that, include: There are two end connectors, which are used to connect to the ends of the two precast beams to be connected. They include rectangular steel plates with multiple through holes for the reinforcing bars of the precast beams to pass through. The internal rigid connectors consist of four parts, made of rigid metal, with a flat plate in the middle and symmetrical vertical flanges at both ends to form an internal connecting flange, which is connected to the two end connectors by bolts respectively. The external flexible connectors consist of four pieces made of flexible metal, with a flat plate in the middle and symmetrical vertical flanges at both ends to form an external connecting flange, which is connected to the two end connectors by bolts respectively. Four inner rigid connectors and an outer rigid connector form a double-layered cuboid structure. The inner rigid connectors and the outer flexible connectors are fitted together one by one, and grease is filled between the inner rigid connectors and the outer flexible connectors.

2. The shear-resistant precast beam connection assembly according to claim 1, characterized in that, The inner side of the internal rigid connector is vertically provided with a reinforcing rib.

3. The shear-resistant precast beam connection assembly according to claim 1, characterized in that, The internal rigid connector is made of low-alloy high-strength steel, weather-resistant steel, or ultra-high-strength steel.

4. The shear-resistant precast beam connection assembly according to claim 3, characterized in that, The material of the internal rigid connector is Q355B, Q355NH, or DH890.

5. The shear-resistant precast beam connection assembly according to claim 1, characterized in that, The material of the external flexible connector is austenitic stainless steel, duplex stainless steel, tin bronze, or nickel-titanium shape memory alloy.

6. A shear-resistant precast beam connection assembly according to claim 5, characterized in that, The material grade of the external flexible connector is 316L, 2205, QSn6.5-0.1, or NiTiNOL.

7. The shear-resistant precast beam connection assembly according to claim 1, characterized in that, Both the inner rigid connector and the outer flexible connector are made by bending corresponding metal plates, with the bending radius of the outer flexible connector being larger than that of the inner rigid connector.

8. A shear-resistant precast beam connection assembly according to claim 1, characterized in that, One side of the end connector has an auxiliary connecting sleeve adapted to the shape of the precast beam, which is used to fit onto the end of the precast beam.

9. A shear-resistant precast beam connection assembly according to claim 1, characterized in that, The three components are connected synchronously by simultaneously passing bolts through the end connector, the inner rigid connector, and the outer flexible connector.

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