Steel-concrete composite joint for steel-concrete composite structure bridge and construction method

Abstract

The invention relates to the technical field of steel-concrete double-layer bridges, in particular to a steel-concrete composite joint for a steel-concrete composite structure bridge and a construction method. A joint main body of the steel-concrete combined joint comprises a steel member, and the steel member comprises a steel plate member and a shear nail member arranged at the steel plate member; the steel plate component comprises two main steel plate components which are arranged at intervals, and a cavity structure is formed between the two main steel plate components; the reinforcing steel plate component is arranged at the cavity structure and is perpendicular to the main steel plate component; the reinforcing steel plate components comprise the first reinforcing steel plate component parallel to the concrete pouring face, the second reinforcing steel plate component perpendicular to the concrete pouring face and the third reinforcing steel plate component parallel to the extending direction of the web members. The connection durability and crack resistance between the upper-layer steel structure bridge body and the lower-layer concrete bridge body can be effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of steel-concrete double-deck bridges, and specifically, to a steel-concrete composite joint and a construction method for a steel-concrete composite structure bridge. Background Art

[0002] Compared with traditional double-deck steel truss girders, in a steel-concrete double-deck rotating bridge, the lower concrete structure replaces the steel lower chord and the orthotropic steel bridge deck. Firstly, it conforms to the stress state during the rotating construction process, gives full play to the advantage of good compressive performance of concrete, avoids increasing the plate thickness of the lower steel structure near the fulcrum, and saves steel. Secondly, the maintenance workload of the lower concrete beam is small, meeting the requirements of good structural durability and less later maintenance workload. The technical difficulties of the steel-concrete double-deck rotating bridge are reflected in: strong spatiality and complex stress; many system conversions, the structure is a T-shaped structure during the rotation period and a continuous beam system after the bridge is completed; the stress of the steel-concrete joint is complex, the positioning accuracy requirements of the steel structure are strict, and the concrete pouring quality requirements are high.

[0003] For a steel-concrete double-deck rotating bridge, one problem to be considered is how to connect the upper steel structure bridge body and the lower concrete bridge body to provide better stress performance, and there is a lack of such research in the prior art. Summary of the Invention

[0004] In order to achieve a better connection between the upper steel structure bridge body and the lower concrete bridge body in a steel-concrete double-deck rotating bridge, the present invention provides a steel-concrete composite joint and a construction method for a steel-concrete composite structure bridge, which can effectively improve the connection durability and crack resistance between the upper steel structure bridge body and the lower concrete bridge body.

[0005] A steel-concrete composite joint for a steel-concrete composite structure bridge according to the present invention includes a joint main body, the joint main body includes a steel member, and the steel member includes a steel plate member and a shear stud member provided at the steel plate member; wherein, the steel plate member includes, Two main steel plate members arranged at intervals, a cavity structure is formed between the two main steel plate members; wherein, a connecting part for being buried in a concrete beam is formed at the lower part of the cavity structure, a transition part for being buried in a concrete boss formed by secondary pouring is formed in the middle of the cavity structure, and an installation part for installing a web member is formed at the upper part of the cavity structure; A reinforcing steel plate member provided at the cavity structure, the reinforcing steel plate member is arranged perpendicular to the main steel plate member; wherein, the reinforcing steel plate member includes a first reinforcing steel plate member parallel to the concrete pouring surface, a second reinforcing steel plate member perpendicular to the concrete pouring surface, and a third reinforcing steel plate member parallel to the extending direction of the web member.

[0006] Preferably, the main steel plate member is constructed symmetrically left and right, and the symmetry axis of the main steel plate member is perpendicular to the concrete pouring surface; On both the left and right sides at the corresponding connection part of the main steel plate member, they extend outward along the direction parallel to the concrete pouring surface, respectively forming a left connection plate and a right connection plate, and the left connection plate and the right connection plate are symmetrical about the symmetry axis; Below the corresponding connection part of the main steel plate member, it extends outward perpendicular to the concrete pouring surface, forming a lower connection plate, and the lower connection plate is symmetrical on the symmetry axis; Above the corresponding installation part of the main steel plate member, a left chord installation plate, a middle chord installation plate, and a right chord installation plate are respectively provided along the extension direction of the corresponding chord. The left chord installation plate and the right chord installation plate are symmetrical about the symmetry axis, and the middle chord installation plate is symmetrical on the symmetry axis.

[0007] Preferably, the connecting edges between the left connection plate and the left chord installation plate, the left chord installation plate and the middle chord installation plate, the middle chord installation plate and the right chord installation plate, and the right chord installation plate and the right connection plate all form arc connecting edges.

[0008] Preferably, the first reinforcing steel plate member includes a first reinforcing steel plate, one end of the first reinforcing steel plate extends to the left end of the left connection plate, and the other end extends to the right end of the right connection plate; The second reinforcing steel plate member includes a lower reinforcing member located below the first reinforcing steel plate member and an upper reinforcing member located above the first reinforcing steel plate member; the lower reinforcing member includes a plurality of lower reinforcing plates arranged at intervals, the upper end of the lower reinforcing plate extends to the first reinforcing steel plate, and the lower end of the lower reinforcing plate extends to the lower end of the lower connection plate; the upper reinforcing member includes a plurality of upper reinforcing plates arranged at intervals, the lower end of the upper reinforcing plate extends to the first reinforcing steel plate, and the upper end of the upper reinforcing plate extends to the area of the corresponding transition part of the main steel plate member; The third reinforcing steel plate member includes a plurality of third reinforcing steel plates. The third reinforcing steel plates include a left reinforcing steel plate, a middle reinforcing steel plate, and a right reinforcing steel plate corresponding to the left chord installation plate, the middle chord installation plate, and the right chord installation plate respectively. The upper ends of the left reinforcing steel plate, the middle reinforcing steel plate, and the right reinforcing steel plate respectively extend to the upper ends of the left chord installation plate, the middle chord installation plate, and the right chord installation plate, and the lower ends of the left reinforcing steel plate, the middle reinforcing steel plate, and the right reinforcing steel plate all extend to the area of the corresponding transition part of the main steel plate member.

[0009] Preferably, there are 2 left reinforcing steel plates and they are respectively located on both sides of the left chord installation plate, there is 1 middle reinforcing steel plate and it is located in the middle of the middle chord installation plate, and there are 2 right reinforcing steel plates and they are respectively located on both sides of the right chord installation plate; The third reinforcing steel plate member further includes a plurality of first rib plates respectively arranged on the inner sides of the left chord installation plate, on both sides of the middle reinforcing steel plate, and on the inner sides of the right reinforcing steel plates, and second rib plates respectively located between the 2 left reinforcing steel plates and between the 2 right reinforcing steel plates and arranged on the main steel plate member.

[0010] Preferably, the upper ends of the upper reinforcing plate, the lower ends of the left reinforcing steel plate, the lower ends of the middle reinforcing steel plate and the lower ends of the right reinforcing steel plate are all recessed inward to form grooves.

[0011] Preferably, through holes are formed in the first reinforcing steel plate, the lower reinforcing plate and the upper reinforcing plate.

[0012] Preferably, the shear stud member includes a plurality of shear studs, and the plurality of shear studs are respectively arranged on both sides of the first reinforcing steel plate and the main steel plate member.

[0013] Preferably, an installation flange for cooperating with the web member is provided at the upper end of the installation part.

[0014] According to a construction method of a steel-concrete composite joint for a steel-concrete composite structure bridge of the present invention, when constructing and installing any one of the above-mentioned steel-concrete composite joints for a steel-concrete composite structure bridge, it includes: After binding the connecting part of the joint body with the steel bar framework in the concrete beam, pouring to form a concrete beam; Performing secondary pouring on the transition part of the joint body to form a concrete boss.

[0015] The present invention has the following beneficial effects: It can realize the connection between the upper steel structure bridge body and the lower concrete bridge body; among them, the installation part can provide the installation position of the web member, and thus can realize the fixed installation of a truss made of, for example, steel; the connecting part can be buried in the concrete beam, realizing the stable connection between the steel-concrete composite joint and the lower concrete bridge body; by setting the transition part, it is possible to realize the outward convex extension of the joint body by forming a concrete boss through secondary pouring, which can effectively prevent cracks from occurring between the joint body and the lower concrete bridge body over time, thereby effectively improving the crack resistance and durability between the steel-concrete composite joint and the lower concrete bridge body. Description of the Drawings

[0016] Figure 1 Schematic diagram of a steel-concrete composite joint in a specific embodiment of the present invention; Figure 2 Schematic diagram of the main steel plate member of a steel-concrete composite joint in a specific embodiment of the present invention; Figure 3 For Figure 1 Schematic cross-sectional view along the axis of symmetry; Figure 4 For Figure 1 Schematic cross-sectional view along the first reinforcing steel plate.

[0017] Figures 1-4 The corresponding relationship between the component names and the reference numerals in Node main body 100; main steel plate member 110; left connection plate 111; right connection plate 112; lower connection plate 113; left web member mounting plate 114; middle web member mounting plate 115; right web member mounting plate 116; connection part 121; transition part 122; mounting part 123; first reinforced steel plate member 131; first reinforced steel plate 131a; second reinforced steel plate member 132; lower reinforcement plate 132a; upper reinforcement plate 132b; third reinforced steel plate member 133; left reinforcement plate 133a; middle reinforcement plate 133b; right reinforcement plate 133c; first rib plate 133d; second rib plate 133e; shear stud 140. Detailed implementation mode

[0018] To further understand the content of the present invention, the present invention will be described in detail in combination with embodiments. It should be understood that the embodiments are only for explaining the present invention rather than limiting it.

[0019] As shown in Figures 1-4 , this embodiment provides a steel-concrete composite joint for a steel-concrete composite bridge. It includes a node main body 100, and the node main body 100 includes steel members, and the steel members include steel plate members and shear stud members provided at the steel plate members; wherein, the steel plate members include, Two main steel plate members 110 arranged at intervals, and a cavity structure is formed between the two main steel plate members 110; wherein, a connection part 121 for being buried in a concrete beam is formed at the lower part of the cavity structure, a transition part 122 for being buried in a concrete boss formed by secondary pouring is formed in the middle of the cavity structure, and a mounting part 123 for mounting a web member is formed at the upper part of the cavity structure; Reinforced steel plate members provided at the cavity structure, and the reinforced steel plate members are arranged perpendicular to the main steel plate members 110; wherein, the reinforced steel plate members include a first reinforced steel plate member 131 parallel to the concrete pouring surface, a second reinforced steel plate member 132 perpendicular to the concrete pouring surface, and a third reinforced steel plate member 133 parallel to the extending direction of the web member.

[0020] Through the above, the connection between the upper steel structure bridge body and the lower concrete bridge body can be realized; wherein, the mounting part 123 can provide a mounting position for the web member, and thus the fixed installation of, for example, a steel truss can be realized; the connection part 121 can be buried in the concrete beam, realizing the stable connection between the steel-concrete composite joint and the lower concrete bridge body; by providing the transition part 122, the node main body 100 can be extended outwardly by forming a concrete boss through secondary pouring, effectively avoiding cracks between the node main body 100 and the lower concrete bridge body over time, and thus effectively improving the crack resistance and durability between the steel-concrete composite joint and the lower concrete bridge body.

[0021] In this embodiment, the main steel plate member 110 is constructed symmetrically left and right, and the symmetry axis of the main steel plate member 110 is perpendicular to the concrete pouring surface; On the left and right sides of the main steel plate member 110 corresponding to the connection part 121, they both extend outward along the direction parallel to the concrete pouring surface, respectively forming a left connection plate 111 and a right connection plate 112, and the left connection plate 111 and the right connection plate 112 are symmetrical about the symmetry axis; Below the main steel plate member 110 corresponding to the connection part 121, it extends outward perpendicular to the concrete pouring surface, forming a lower connection plate 113, and the lower connection plate 113 is symmetrical on the symmetry axis; Above the main steel plate member 110 corresponding to the installation part 123, a left web member installation plate 114, a middle web member installation plate 115 and a right web member installation plate 116 are respectively provided along the extending direction of the corresponding web member. The left web member installation plate 114 and the right web member installation plate 116 are symmetrical about the symmetry axis, and the middle web member installation plate 115 is symmetrical on the symmetry axis.

[0022] Through the above, the left connection plate 111, the right connection plate 112 and the lower connection plate 113 can increase the matching dimension between the joint body 100 and the concrete beam of the lower-layer concrete bridge body in the longitudinal and height directions, so the mechanical properties can be effectively improved; the left web member installation plate 114, the middle web member installation plate 115 and the right web member installation plate 116 can provide installation positions for 3 web members at the same joint, which is beneficial to cooperate with the conventional steel truss; in addition, the main steel plate member 110 is constructed symmetrically left and right, so that the joint body 100 can also be distributed symmetrically as a whole, which is beneficial to the uniform stress.

[0023] In this embodiment, the connecting edges between the left connection plate 111 and the left web member installation plate 114, between the left web member installation plate 114 and the middle web member installation plate 115, between the middle web member installation plate 115 and the right web member installation plate 116, and between the right web member installation plate 116 and the right connection plate 112 all form arc connecting edges. Therefore, the structure is reasonable and stress concentration is avoided.

[0024] In this embodiment, the first reinforcing steel plate member 131 includes a first reinforcing steel plate 131a. One end of the first reinforcing steel plate 131a extends to the left end of the left connection plate 111, and the other end extends to the right end of the right connection plate 112; The second reinforcing steel plate member 132 includes a lower reinforcing member located below the first reinforcing steel plate 131a member and an upper reinforcing member located above the first reinforcing steel plate 131a member; the lower reinforcing member includes a plurality of lower reinforcing plates 132a arranged at intervals, the upper ends of the lower reinforcing plates extend to the first reinforcing steel plate 131a, and the lower ends of the lower reinforcing plates extend to the lower ends of the lower connection plates 113; the upper reinforcing member includes a plurality of upper reinforcing plates 132b arranged at intervals, the lower ends of the upper reinforcing plates extend to the first reinforcing steel plate 131a, and the upper ends of the upper reinforcing plates extend to the area of the main steel plate member 110 corresponding to the transition portion 122; The third reinforcing steel plate member 133 includes a plurality of third reinforcing steel plates, and the third reinforcing steel plates include a left reinforcing steel plate 133a, a middle reinforcing steel plate 133b, and a right reinforcing steel plate 133c corresponding to the left web member mounting plate 114, the middle web member mounting plate 115, and the right web member mounting plate 116 respectively. The upper ends of the left reinforcing steel plate 133a, the middle reinforcing steel plate 133b, and the right reinforcing steel plate 133c extend to the upper ends of the left web member mounting plate 114, the middle web member mounting plate 115, and the right web member mounting plate 116 respectively, and the lower ends of the left reinforcing steel plate 133a, the middle reinforcing steel plate 133b, and the right reinforcing steel plate 133c all extend to the area of the main steel plate member 110 corresponding to the transition portion 122.

[0025] In the above, the first reinforcing steel plate 131a, the lower reinforcing plate 132a, and the upper reinforcing plate 132b can effectively form a shear-resistant structure, effectively improving the shear resistance performance at the joint body 100.

[0026] In this embodiment, there are 2 left reinforcing steel plates 133a, which are respectively located on both sides of the left web member mounting plate 114, there is 1 middle reinforcing steel plate 133b, which is located in the middle of the middle web member mounting plate 115, and there are 2 right reinforcing steel plates 133c, which are respectively located on both sides of the right web member mounting plate 116; The third reinforcing steel plate member 133 further includes a plurality of first rib plates 133d respectively arranged on the inner sides of the left web member mounting plate 114, on both sides of the middle reinforcing steel plate 133b, and on the inner sides of the right reinforcing steel plates 133c, and second rib plates 133e respectively located between the 2 left reinforcing steel plates 133a and between the 2 right reinforcing steel plates 133c and arranged on the main steel plate member 110.

[0027] In the above, the left reinforcing steel plate 133a, the middle reinforcing steel plate 133b, and the right reinforcing steel plate 133c can jointly form the outer contour structure of the installation portion 123 with the main steel plate member 110 to strengthen the installation portion 123; the first rib plates 133d and the second rib plates 133e can effectively improve the compressive capacity at the installation portion 123.

[0028] In this embodiment, grooves are formed by inward depression at the upper ends of the upper reinforcement plate 132b, the lower ends of the left reinforcement steel plate 133a, the lower ends of the middle reinforcement steel plate 133b, and the lower ends of the right reinforcement steel plate 133c. With this structure, a channel for concrete pouring can be effectively formed, which is beneficial for subsequent construction and installation.

[0029] In this embodiment, through holes are formed in the first reinforcement steel plate 131a, the lower reinforcement plate 132a, and the upper reinforcement plate 132b. With this structure, a channel for concrete pouring can be effectively formed, which is beneficial for subsequent construction and installation.

[0030] In this embodiment, the shear stud member includes a plurality of shear studs 140, and the plurality of shear studs 140 are respectively arranged on both sides of the first reinforcement steel plate 131a and the main steel plate member 110. Thereby, the shear resistance performance can be further improved.

[0031] In this embodiment, an installation flange for cooperating with the web member is provided at the upper end of the installation part 123. Thereby, the installation of the web member can be simplified.

[0032] When the steel-concrete composite joint for a steel-concrete composite structure bridge in this embodiment is under construction and installation, it can be carried out based on the following steps, for example: After the connection part 121 of the joint body 100 is jointly tied with the steel bar framework in the concrete beam, the concrete beam is poured and formed; The transition part 122 of the joint body 100 is secondarily poured to form a concrete boss.

[0033] It is easy to understand that those skilled in the art can combine, split, recombine, etc. the embodiments of the present application based on one or several embodiments provided by the present application to obtain other embodiments, and these embodiments do not exceed the protection scope of the present application.

[0034] The above schematically describes the present invention and its embodiments. This description is not restrictive. What is shown in the embodiments is only part of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if those of ordinary skill in the art are inspired by it and design a structural manner and an embodiment similar to this technical solution without creative work without departing from the purpose of the present invention, they should all fall within the protection scope of the present invention.

Claims

1. A steel-concrete composite node for a steel-concrete composite structure bridge, characterized in that: The node body (100) comprises a node main body (100), wherein the node main body (100) comprises a steel component, wherein the steel component comprises a steel plate component and a shear nail component arranged at the steel plate component; wherein the steel plate component comprises: Two main steel plate components (110) are arranged at an interval, and a cavity structure is formed between the two main steel plate components (110); wherein the lower portion of the cavity structure forms a connecting portion (121) for being buried in a concrete beam, the middle portion of the cavity structure forms a transition portion (122) for being buried in a concrete boss formed by secondary pouring, and the upper portion of the cavity structure forms a mounting portion (123) for mounting a web member; A reinforcing steel plate component is arranged at the cavity structure, and the reinforcing steel plate component is arranged perpendicular to the main steel plate component (110); wherein the reinforcing steel plate component comprises a first reinforcing steel plate component (131) parallel to the concrete casting surface, a second reinforcing steel plate component (132) perpendicular to the concrete casting surface, and a third reinforcing steel plate component (133) parallel to the extension direction of the web member.

2. The steel-concrete composite node for a steel-concrete composite structure bridge according to claim 1, characterized in that: The main steel plate component (110) is bilaterally symmetrically constructed, and the symmetry axis of the main steel plate component (110) is perpendicular to the concrete casting surface; The left and right sides of the main steel plate component (110) corresponding to the connection portion (121) are extended outward in a direction parallel to the concrete casting surface to form a left connection plate (111) and a right connection plate (112), respectively. The left connection plate (111) and the right connection plate (112) are symmetrical about the symmetry axis. The main steel plate member (110) extends outwardly perpendicularly to the concrete pouring surface below the corresponding connection portion (121) to form a lower connection plate (113), and the lower connection plate (113) is symmetrical on the symmetry axis; A left web member mounting plate (114), a middle web member mounting plate (115) and a right web member mounting plate (116) are respectively provided above the corresponding mounting portion (123) of the main steel plate member (110) along the extension direction of the corresponding web member. The left web member mounting plate (114) and the right web member mounting plate (116) are symmetrical about the axis of symmetry, and the middle web member mounting plate (115) is symmetrical about the axis of symmetry.

3. The steel-concrete composite node for a steel-concrete composite structure bridge according to claim 2, characterized in that: The connecting edges between the left connecting plate (111) and the left web rod mounting plate (114), the left web rod mounting plate (114) and the middle web rod mounting plate (115), the middle web rod mounting plate (115) and the right web rod mounting plate (116), and the right web rod mounting plate (116) and the right connecting plate (112) all constitute arc connecting edges.

4. The steel-concrete composite node for a steel-concrete composite structure bridge according to claim 3, characterized in that: The first reinforcing steel plate component (131) comprises a first reinforcing steel plate (131a), one end of the first reinforcing steel plate (131a) extending to the left end of the left connecting plate (111), and the other end extending to the right end of the right connecting plate (112); The second reinforcing steel plate component (132) comprises a lower reinforcing component located below the first reinforcing steel plate (131a) component and an upper reinforcing component located above the first reinforcing steel plate (131a) component; the lower reinforcing component comprises a plurality of spaced lower reinforcing plates (132a), the upper ends of the lower reinforcing plates extending to the first reinforcing steel plate (131a), and the lower ends of the lower reinforcing plates extending to the lower end of the lower connecting plate (113); the upper reinforcing component comprises a plurality of spaced upper reinforcing plates (132b), the lower ends of the upper reinforcing plates extending to the first reinforcing steel plate (131a), and the upper ends of the upper reinforcing plates extending to the region of the main steel plate component (110) corresponding to the transition portion (122); The third reinforcing steel plate component (133) comprises a plurality of third reinforcing steel plates, the third reinforcing steel plates comprising a left reinforcing steel plate (133a), a middle reinforcing steel plate (133b) and a right reinforcing steel plate (133c) respectively corresponding to the left web rod mounting plate (114), the middle web rod mounting plate (115) and the right web rod mounting plate (116); the upper ends of the left reinforcing steel plate (133a), the middle reinforcing steel plate (133b) and the right reinforcing steel plate (133c) respectively extend to the upper ends of the left web rod mounting plate (114), the middle web rod mounting plate (115) and the right web rod mounting plate (116); and the lower ends of the left reinforcing steel plate (133a), the middle reinforcing steel plate (133b) and the right reinforcing steel plate (133c) all extend to the area corresponding to the transition portion (122) of the main steel plate component (110).

5. The steel-concrete composite node for a steel-concrete composite structure bridge according to claim 4, characterized in that: There are two left reinforcing steel plates (133a) and they are respectively located at both sides of the left web rod mounting plate (114); there is one middle reinforcing steel plate (133b) and it is located at the middle of the middle web rod mounting plate (115); there are two right reinforcing steel plates (133c) and they are respectively located at both sides of the right web rod mounting plate (116); The third reinforcing steel plate component (133) also includes a plurality of first ribs (133d) respectively arranged on the inner side of the left web mounting plate (114), on both sides of the middle reinforcing steel plate (133b) and on the inner side of the right reinforcing steel plate (133c), and a second rib (133e) respectively arranged on the main steel plate component (110) in the middle of the two left reinforcing steel plates (133a) and in the middle of the two right reinforcing steel plates (133c).

6. The steel-concrete composite node for a steel-concrete composite structure bridge according to claim 5, characterized in that: The upper end of the upper reinforcing plate (132b), the lower end of the left reinforcing steel plate (133a), the lower end of the middle reinforcing steel plate (133b) and the lower end of the right reinforcing steel plate (133c) are all recessed inwards to form a groove.

7. The steel-concrete composite node for a steel-concrete composite structure bridge according to claim 6, characterized in that: The first reinforcing steel plate (131a), the lower reinforcing plate (132a) and the upper reinforcing plate (132b) are all configured with through holes.

8. The steel-concrete composite node for a steel-concrete composite structure bridge according to claim 7, characterized in that: The shear nail component comprises a plurality of shear nails (140), wherein the plurality of shear nails (140) are respectively arranged at both sides of the first reinforcing steel plate (131a) and the main steel plate component (110).

9. The steel-concrete composite node for a steel-concrete composite structure bridge according to claim 8, characterized in that: The upper end of the mounting portion (123) is provided with a mounting flange for cooperating with the web rod.

10. A construction method for a steel-concrete composite node of a steel-concrete composite structure bridge, characterized in that: When constructing and installing the steel-concrete composite node for a steel-concrete composite structure bridge as described in any one of claims 1 to 9, the method comprises: The connecting portion (121) of the node body (100) is tied together with the steel reinforcement skeleton in the concrete beam, and then cast to form the concrete beam; The transition portion (122) of the node body (100) is cast for a second time to form a concrete boss.

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