Prestressed segmental beam joint structure
Through the method of connecting the steel plate by arc-shaped surface splicing and bonding glue, the problem of insufficient shear bearing capacity of prestressed concrete segment beam joints under the ultimate bearing capacity state is solved, and the efficient bending and shear bearing capacity of segment beam joints is achieved, which is suitable for prefabricated structures.
Patent Information
- Application Number
- CN202422083015.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-27
- Publication Date
- 2025-08-29
- Estimated Expiration
- 2034-08-27
AI Technical Summary
The shear bearing capacity of the existing prestressed concrete segment beam joints is insufficient under the ultimate bearing capacity state, and the concrete and steel bars of the components at the joints cannot play an effective role.
The segment beam structure with arc-shaped surface splicing is adopted, combined with adhesive and overlapping parts, and the connection is fixed by connecting steel plates and bolts or welding. The tensile performance of ultra-high performance concrete is used to improve the bending and shear bearing capacity of the joints.
It enhances the bending and shear bearing capacity of segment beam joints, fully utilizes the performance of ultra-high-strength concrete, has simple and reliable structure, convenient construction, and is suitable for prefabricated structures.
Smart Images
Figure CN223281181U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the engineering field, in particular to a prestressed segment beam joint structure. Background Art
[0002] Prestressed concrete segmental beams are an assembled structural technology that uses prestressing technology to splice segmented prefabricated beams into an integral beam structure. They have the advantages of quick construction, little environmental impact, and excellent structural durability. They are widely used in major civil engineering projects such as cross-sea bridges and urban bridges.
[0003] At present, the joints of prestressed concrete segmental beams mainly adopt a straight seam structure with shear keys. Its main disadvantages are: first, since there are no connecting structural steel bars at the top and bottom of the segment beam at the joint, only prestressed tendons pass through. Therefore, tensile stress is not allowed to appear in the joint section under the limit state of normal use. Under the ultimate bearing capacity state, the concrete of the component and the structural steel bars in the segment cannot play a role; second, the shear bearing capacity of the joint mainly depends on the shear resistance of the shear key and the friction between the joints, and the shear bearing capacity of the joint is not ideal. Utility Model Content
[0004] The technical problem to be solved by the utility model is to provide a joint structure capable of improving the bending and shear bearing capacity of the joints of segment beams.
[0005] The technical solution of the utility model for solving the above technical problems is as follows: a prestressed segmental beam joint structure, comprising a segmental beam, wherein the splicing surface between the segmental beam and the adjacent segmental beam is an arcuate surface, the central axis of the arcuate surface is horizontally arranged, the splicing surfaces of the segmental beams are coated with adhesive, and the two adjacent segmental beams are fixedly connected by a lap joint.
[0006] The beneficial effects of the utility model are as follows: the arc-shaped surface splicing enables the two adjacent segment beams to be interlocked and locked, thereby improving the bending and shear bearing capacity of the segment beam joints, and giving full play to the tensile properties of ultra-high strength concrete. It has the advantages of simple and reliable structure, reasonable structural force, and convenient construction, and has broad prospects for promotion and application.
[0007] On the basis of the above technical solution, the present invention can also be improved as follows.
[0008] Furthermore, connecting parts are provided on the splicing surfaces at both ends of the segment beam, and both ends of the overlapped part are respectively fixedly connected to the connecting parts of the two adjacent segment beams.
[0009] The beneficial effect of adopting the above further solution is that the overlap portion and the connection portion cooperate to firmly lock the two adjacent segment beams and improve the shear bearing capacity.
[0010] Furthermore, the connection portion includes a connection steel plate, and the connection steel plate is embedded in the top and bottom of the segment beam splicing surface;
[0011] Both ends of the overlap portion are respectively fixedly connected to the connecting steel plates of the two adjacent segment beams.
[0012] The beneficial effect of adopting the above further solution is: the connecting steel plates are fixed by embedding, thereby ensuring the overall strength of the connection part.
[0013] Furthermore, the overlapping portion includes overlapping steel plates, and the overlapping steel plates are provided on the top and bottom surfaces of the segment beam, and both ends of the overlapping steel plates are fixedly connected to the connecting steel plates of the two adjacent segment beams.
[0014] The beneficial effect of adopting the above further solution is that the shear bearing capacity is further improved by cooperating with the overlapping steel plates and the connecting steel plates.
[0015] Furthermore, the connecting steel plate and the overlapping steel plate are connected by bolts.
[0016] The beneficial effects of adopting the above further solution are: bolt tightening, simple structure, and easy construction.
[0017] Furthermore, the connecting steel plate and the overlapping steel plate are connected by welding.
[0018] The beneficial effect of adopting the above further solution is that welding is used in conjunction with bolt connection to fully ensure the connection strength.
[0019] Furthermore, a distance is provided between the central axes of the arc-shaped surfaces at both ends of the segment beam.
[0020] The beneficial effect of adopting the above further solution is that the central axes of the arc-shaped surfaces at both ends of the segment beam do not overlap, thereby preventing the segment beam from rotating and sliding.
[0021] Furthermore, the adhesive is a structural adhesive.
[0022] The beneficial effects of adopting the above further solution are: the structural adhesive has high strength, peeling resistance, impact resistance, simple construction process, and is suitable for the engineering field.
[0023] Furthermore, the structural adhesive is epoxy structural adhesive.
[0024] The beneficial effects of adopting the above further solution are: the epoxy structural adhesive has good adhesion, can ensure stable bonding, and also has strong weather resistance.
[0025] Furthermore, the segment beam is made of ultra-high performance concrete.
[0026] The beneficial effects of adopting the above further scheme are: ultra-high performance concrete has ultra-high toughness, ultra-high strength and good durability. Compared with conventional concrete segmental beams, ultra-high performance concrete segmental beams have smaller component size, lighter weight, easier transportation and installation, and are more suitable for prefabricated structure technology. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] Figure 1 This is a schematic diagram of the segment beam joint structure of the present utility model.
[0028] Figure 2 This is a schematic diagram of the segmental beam splicing of the utility model (1).
[0029] Figure 3 This is a schematic diagram of the segmental beam splicing of the utility model (2).
[0030] Figure 4 This is a schematic diagram of the translation of the segment beam of the utility model.
[0031] Figure 5 This is a schematic diagram of the rotation of the segment beam of the present invention.
[0032] In the accompanying drawings, the components represented by the reference numerals are as follows:
[0033] 1. Segmental beam; 2. Connecting steel plate; 3. Overlap steel plate. DETAILED DESCRIPTION
[0034] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.
[0035] Example 1
[0036] like Figures 1 to 5 As shown, a prestressed segmental beam joint structure includes a segmental beam 1, wherein the splicing surface between the segmental beam 1 and the adjacent segmental beam 1 is an arcuate surface, the central axis of the arcuate surface is horizontally arranged, the splicing surfaces of the segmental beam 1 are coated with adhesive, and the two adjacent segmental beams 1 are fixedly connected by a lap joint.
[0037] The beneficial effects of this embodiment are: the arc-shaped surface splicing causes the two adjacent segment beams to interlock and lock, thereby improving the bending and shear bearing capacity of the segment beam joints, and fully exerting the tensile properties of ultra-high strength concrete. It has the advantages of simple and reliable structure, reasonable structural force, and convenient construction, and has broad prospects for promotion and application.
[0038] Specifically, such as Figure 2As shown, the arcuate surfaces at both ends of the middle segment beam 1 of the bridge face in opposite directions, while the arcuate surfaces at both ends of the remaining segment beams 1 face in the same direction. The segment beams 1 are sequentially spliced together through the arcuate splicing surfaces and then fixed with adhesive and overlapped joints. The segment beam joints have higher bending and shear bearing capacities.
[0039] like Figure 4 As shown, when any segment beam 1 is subjected to force and undergoes translational motion, the segment beams 1 on both sides support it;
[0040] like Figure 5 As shown, when any segment beam 1 rotates under force, the segment beams 1 on both sides support it.
[0041] As a parallel technical solution of this embodiment, Figure 3 As shown, the arcuate surfaces at both ends of the segment beam 1 can all be in opposite directions, and the splicing surfaces of two adjacent segment beams 1 are respectively concave and convex structures, and the concave and convex structures are spliced in sequence during splicing.
[0042] Example 2
[0043] like Figure 1 As shown, preferably, on the basis of Example 1, connection parts are provided on the splicing surfaces at both ends of the segment beam 1, and the two ends of the overlapped part are respectively fixedly connected to the connection parts of the two adjacent segment beams 1.
[0044] The beneficial effect of adopting the preferred solution in the above embodiment is that the overlap portion and the connection portion cooperate to firmly lock the two adjacent segment beams, thereby improving the shear bearing capacity.
[0045] Example 3
[0046] like Figure 1 As shown, preferably, on the basis of embodiment 1-2, the connection portion includes a connection steel plate 2, and the connection steel plate 2 is embedded in the top and bottom of the splicing surface of the segment beam 1;
[0047] Both ends of the overlapped portion are fixedly connected to the connecting steel plates 2 of the two adjacent segment beams 1 .
[0048] The beneficial effect of adopting the preferred solution in the above embodiment is: the connecting steel plates 2 are fixed by embedding, thereby ensuring the overall strength of the connection part.
[0049] Example 4
[0050] like Figure 1 As shown, preferably, on the basis of Examples 1-3, the overlapping portion includes an overlapping steel plate 3, and the overlapping steel plate 3 is provided on the top and bottom surfaces of the segment beam 1, and the two ends of the overlapping steel plate 3 are respectively fixedly connected to the connecting steel plates 2 of the two adjacent segment beams 1.
[0051] Preferably, the connecting steel plate 2 and the overlapping steel plate 3 are connected by bolts.
[0052] Preferably, the connecting steel plate 2 and the overlapping steel plate 3 are connected by welding.
[0053] The beneficial effect of adopting the preferred solution in the above embodiment is: firstly, the steel plate 2 and the overlapping steel plate 3 are fixedly connected by bolts, and then welded together to fully ensure the connection strength.
[0054] Example 5
[0055] like Figures 2 to 5 As shown, preferably, based on embodiments 1-4, a distance is provided between the central axes of the arc-shaped surfaces at both ends of the segment beam 1.
[0056] The beneficial effect of adopting the preferred solution in the above embodiment is that the central axes of the arc-shaped surfaces at both ends of the segment beam 1 do not overlap, thereby preventing the segment beam 1 from rotating and sliding.
[0057] Specifically, such as Figure 2 As shown, if the arcuate surfaces at both ends of the segment beam 1 face the same direction and the central axes of the arcuate surfaces are coaxial, the two arcuate surfaces form concentric circles, and the segment beam 1 may fall out during rotation. To prevent this from happening, the central axes of the two arcuate surfaces need to be staggered.
[0058] like Figure 3 As shown, if the arcuate surfaces at both ends of the segment beam 1 are convex, when the central axes of the two arcuate surfaces are coaxial, a perfect circle is formed. The segment beam 1 may fall out during rotation. To prevent this from happening, the central axes of the two arcuate surfaces need to be staggered.
[0059] like Figure 3 As shown, if the arc-shaped surfaces at both ends of the segment beam 1 are concave, the central axes of the two arc-shaped surfaces are located in opposite directions and at a certain distance, and there is no risk of falling.
[0060] Example 6
[0061] like Figure 1 As shown, preferably, based on Examples 1-5, the adhesive is a structural adhesive.
[0062] Preferably, the structural adhesive is epoxy structural adhesive.
[0063] The beneficial effects of adopting the preferred solution in the above embodiment are: the epoxy structural adhesive has good adhesion, can ensure stable bonding, and also has strong weather resistance.
[0064] Example 7
[0065] like Figure 1 As shown, preferably, based on Examples 1-6, the segment beam 1 is made of ultra-high performance concrete.
[0066] The beneficial effects of adopting the preferred scheme in the above embodiment are: ultra-high performance concrete has ultra-high toughness, ultra-high strength and good durability. Compared with conventional concrete segmental beams, ultra-high performance concrete segmental beams have smaller component size, lighter weight, easier transportation and installation, and are more suitable for prefabricated structure technology.
[0067] Specifically, concrete is divided into ordinary concrete, high-performance concrete (HPC) and ultra-high-performance concrete (UHPC). Compared with conventional concrete segmental beams, ultra-high-performance concrete (UHPC) segmental beams have smaller components, lighter weight, easier transportation and installation, are more suitable for prefabricated structural technology, and have good application prospects.
[0068] When ultra-high performance concrete (UHPC) segmental beams use conventional joints with shear keys, on the one hand, the good tensile properties of the UHPC components cannot be fully utilized. On the other hand, due to the small size of the UHPC components, it is often difficult to set shear keys, resulting in insufficient shear bearing capacity of the joints. However, by adopting the technical solutions in Examples 1-6, the tensile properties of the ultra-high performance concrete (UHPC) segmental beams can be fully utilized, and the bending and shear bearing capacity of the joints of the segmental beam 1 can be improved.
[0069] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do 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 should not be understood as a limitation to the present invention.
[0070] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.
[0071] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.
[0072] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.
[0073] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.
[0074] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention.
Claims
1. A prestressed segment beam joint structure, characterized in that: The invention comprises a segment beam (1), wherein the splicing surface between the segment beam (1) and the adjacent segment beam (1) is an arcuate surface, the center axis of the arcuate surface is arranged horizontally, the splicing surface of the segment beam (1) is coated with adhesive, and two adjacent segment beams (1) are fixedly connected via a lap joint.
2. The prestressed segment beam joint structure according to claim 1, characterized in that: Connecting portions are provided on the splicing surfaces at both ends of the segment beam (1), and both ends of the overlapped portion are respectively fixedly connected to the connecting portions of two adjacent segment beams (1).
3. The prestressed segment beam joint structure according to claim 2, characterized in that: The connecting portion comprises a connecting steel plate (2), and the connecting steel plate (2) is embedded in the top and bottom of the splicing surface of the segment beam (1); Both ends of the overlapped portion are respectively fixedly connected to the connecting steel plates (2) of the two adjacent segment beams (1).
4. The prestressed segment beam joint structure according to claim 3, characterized in that: The overlapping portion includes an overlapping steel plate (3), and the overlapping steel plate (3) is provided on the top surface and the bottom surface of the segment beam (1). The two ends of the overlapping steel plate (3) are respectively fixedly connected to the connecting steel plates (2) of the two adjacent segment beams (1).
5. The prestressed segment beam joint structure according to claim 4, characterized in that: The connecting steel plate (2) and the overlapping steel plate (3) are connected by bolts.
6. The prestressed segment beam joint structure according to claim 5, characterized in that: The connecting steel plate (2) and the overlapping steel plate (3) are connected by welding.
7. The prestressed segment beam joint structure according to claim 1, characterized in that: A distance is provided between the central axes of the arc-shaped surfaces at both ends of the segment beam (1).
8. The prestressed segment beam joint structure according to claim 1, characterized in that: The adhesive is a structural adhesive.
9. The prestressed segment beam joint structure according to claim 8, characterized in that: The structural adhesive is epoxy structural adhesive.
10. The prestressed segment beam joint structure according to any one of claims 1 to 9, characterized in that: The segment beam (1) is made of ultra-high performance concrete.