A steel-concrete hybrid girder joint section using corrugated steel plate force transmission

Abstract

The application discloses a kind of steel-concrete hybrid beam joint sections using corrugated steel plate force transmission, it is related to bridge engineering technical field.A kind of steel-concrete hybrid beam joint sections using corrugated steel plate force transmission, including several T-shaped stiffening ribs, pressure plate, joint section steel box and several corrugated steel separators.The pressure plate is connected with several T-shaped stiffening ribs on one plate face, another plate face is connected with joint section steel box and several corrugated steel separators, and several corrugated steel separators are located inside joint section steel box.The corrugated steel separator is provided with several oval through holes, and several perforated steel bars pass through the several oval through holes on the corrugated steel separator, and the inside of joint section steel box is filled with concrete.The oval through hole of the application weakens the constraint effect of steel separator on the concrete dowel in the hole, to achieve the purpose of longitudinal shear of corrugated steel separator in normal use stage, and the load-carrying capacity limit stage oval hole PBL connecting piece and steel separator are jointly stressed.

Description

Technical Field

[0001] This invention relates to the field of bridge engineering technology, and specifically to a steel-concrete hybrid beam section that uses corrugated steel plates for force transmission. Background Technology

[0002] A steel-concrete composite beam bridge is a bridge structure in which main beams made of two different materials are connected along the length of the bridge to form a whole. Typically, for long-span bridges, to reduce the dead load bending moment of the main span, steel beams are used for the main span, while concrete or prestressed concrete beams are used for the side spans. Because the main span uses steel beams, it has a large span capacity, while the concrete beams in the side spans or near the main span piers, which have a large self-weight, act as anchorage and counterweight, preventing negative reactions at the supports of the side spans, increasing the overall bridge stiffness, and reducing the deformation of the main span. Concrete side spans can also effectively reduce fatigue damage to the main beams and improve wind resistance. Compared to pure steel beams, this reduces steel consumption and construction costs.

[0003] The steel-concrete composite section is an important component of hybrid beam bridges. Its structural reliability directly affects whether the internal forces between the steel beam and the prestressed concrete beam can be reliably and smoothly transmitted. The internal forces between the steel beam segment and the prestressed concrete beam segment of the steel-concrete composite box girder are mainly transmitted through the stud connectors and PBL connectors of the composite section.

[0004] When using PBL connectors in the joint section of traditional steel-concrete composite box girder, a large number of circular holes are opened in the steel partition plate inside the grid, and a steel bar needs to be inserted into each circular hole to form the PBL connector. This results in a large amount of construction work and low construction efficiency. Moreover, the opening diameter of the steel plate in the traditional structure is small, making it difficult for coarse aggregate in the concrete to enter the hole, which reduces the strength of the concrete inside the hole.

[0005] Therefore, it is necessary to invent a new type of steel-concrete hybrid box girder joint structure that can efficiently transmit force and improve construction efficiency and quality. Summary of the Invention

[0006] The purpose of this invention is to provide a novel steel-concrete hybrid box girder joint structure that simplifies the construction of traditional hybrid box girder joint sections and improves the force transmission and construction efficiency of the joint sections.

[0007] The technical solution adopted to achieve the purpose of this invention is as follows: a steel-concrete composite beam joint section using corrugated steel plates for force transmission, comprising several corrugated steel partitions, a bearing plate, and a joint section steel box.

[0008] The surface of the pressure plate is perpendicular to the longitudinal direction of the bridge. Several T-shaped stiffening ribs are connected to one surface of the pressure plate, and the other surface is connected to the side wall of the connecting section steel box. The connecting section steel box is a horizontally arranged square box.

[0009] The top plate and the bottom plate of the combined segment steel box are welded with a plurality of corrugated steel partitions, the wavelength direction of the corrugated steel partitions is consistent with the longitudinal bridge direction, and the plurality of corrugated steel partitions are arranged in the transverse bridge direction.

[0010] The corrugated steel partitions are provided with a plurality of elliptical through holes for inserting perforated steel bars, the long axis direction of the elliptical through holes is consistent with the wavelength direction of the corrugated steel partitions, each of the elliptical through holes is inserted with a plurality of perforated steel bars, each of the perforated steel bars passes through each of the corrugated steel partitions in the transverse bridge direction, and the two ends of the perforated steel bar abut against the side wall of the combined segment steel box.

[0011] The inside of the combined segment steel box is poured and filled with concrete.

[0012] Further, the corrugated shape of the corrugated steel partition is a sinusoidal curve or a circular arc curve.

[0013] Further, the T-shaped stiffening rib comprises a flange and a web, the plate surface of the web is perpendicular to the horizontal plane, and the length direction of the web is consistent with the longitudinal bridge direction. The end of the plurality of webs is welded to the pressure bearing plate, and the flange is welded to the upper edge of the web. The lower edge of the plurality of webs is welded with a stiffening rib bottom plate, and the end of the stiffening rib bottom plate is welded to the pressure bearing plate.

[0014] Further, the web comprises a widening section and an equal-width section, one end of the widening section is connected with the pressure bearing plate, and the other end is connected with the equal-width section.

[0015] The lower edge of the widening section is horizontal, and the upper edge thereof is inclined away from the pressure bearing plate. The one end of the widening section connected with the pressure bearing plate has a maximum width a, the other end of the widening section connected with the equal-width section has a minimum width b, the width of the equal-width section is c, and a > b = c > 0.

[0016] The beneficial effects of the present application are that:

[0017] 1. The frictional resistance generated by the contact surface between the corrugated steel partition and the filled concrete in the cell under the action of the axial force can in turn resist the longitudinal shear force generated by the axial force on the steel-concrete contact surface, achieving the effect of self-anchoring.

[0018] 2. The structure of the present application opens an elliptical hole in the corrugated steel partition, which facilitates the entry of coarse aggregate of concrete material, and multiple perforated steel bars can be inserted into one hole, improving the construction efficiency.

[0019] 3. The elliptical hole of the present application reduces the restraining effect of the steel partition on the concrete dowel in the hole, reduces the shear resistance of the PBL connecting piece formed by the elliptical hole and the perforated steel bar in the normal use stage, and achieves the purpose of mainly using the longitudinal shear resistance of the corrugated steel partition in the normal use stage and the common stress of the elliptical hole PBL connecting piece and the steel partition in the ultimate stage of bearing capacity. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a perspective view of the new steel-concrete hybrid box girder joint segment structure;

[0021] Figure 2 is a front view of the new steel-concrete hybrid box girder joint segment structure;

[0022] Figure 3 is a top view of the new steel-concrete hybrid box girder joint segment structure;

[0023] Figure 4 is a corrugated shape view of the corrugated steel diaphragm.

[0024] In the figure: corrugated steel diaphragm 1, elliptical through hole 101, bearing plate 2, joint segment steel box 3, top plate 301, bottom plate 302, T-shaped stiffening rib 4, flange 401, web 402, widened section 4021, uniform width section 4022, perforated steel bar 5, concrete 6, and stiffening rib bottom plate 7. DETAILED DESCRIPTION

[0025] The application will be further described below in conjunction with the examples, but should not be understood as limiting the above-mentioned subject matter of the application to the following examples. Various substitutions and modifications can be made according to ordinary technical knowledge and conventional means in the art without departing from the above-mentioned technical idea of the application, and all should be included in the protection scope of the application.

[0026] Example 1

[0027] The example discloses a steel-concrete hybrid beam joint segment using corrugated steel plate force transmission, comprising a plurality of corrugated steel diaphragms 1, bearing plates 2, and joint segment steel boxes 3.

[0028] Referring to Figure 2 , the arrow direction is the longitudinal bridge direction, and the plate surface of the bearing plate 2 is perpendicular to the longitudinal bridge direction. Referring to Figure 3 , a plurality of T-shaped stiffening ribs 4 are connected to one plate surface of the bearing plate 2, and the other plate surface is connected to the side wall of the joint segment steel box 3, which is a horizontally arranged square box.

[0029] Referring to Figure 1 , the T-shaped stiffening rib 4 comprises a flange 401 and a web 402, the plate surface of the web 402 is perpendicular to the horizontal plane, and the length direction of the web 402 is consistent with the longitudinal bridge direction. The end portions of a plurality of the webs 402 are uniformly connected to the bearing plate 2, and the flange 401 is connected to the upper edge of the web 402.

[0030] Referring to Figure 2 , the web 402 comprises a widened section 4021 and a uniform width section 4022, one end of the widened section 4021 is connected to the bearing plate 2, and the other end is connected to the uniform width section 4022.

[0031] The lower edge of the widened section 4021 is horizontal, and the upper edge is inclined away from the bearing plate 2. The widened section 4021 has a maximum width a at the end connected to the bearing plate 2, and a minimum width b at the end connected to the equal-width section 4022. The equal-width section 4022 has a width c, and a > b = c > 0.

[0032] The lower edge of each of the webs 402 is connected to a stiffening rib base plate 7, and the end of the stiffening rib base plate 7 is connected to the bearing plate 2.

[0033] Referring to Figure 1 or 2, a plurality of corrugated steel partitions 1 are connected between the top plate 301 and the bottom plate 302 of the joint section steel box 3. The corrugated steel partitions 1 are arranged in the transverse bridge direction, and the wavelength direction of the corrugated steel partitions 1 is consistent with the longitudinal bridge direction.

[0034] Referring to Figure 2 , a plurality of elliptical through holes 101 are provided on the corrugated steel partitions 1 for inserting perforated steel bars 5. The long axis direction of the elliptical through holes 101 is consistent with the wavelength direction of the corrugated steel partitions 1. Each of the elliptical through holes 101 is inserted with a plurality of perforated steel bars 5. Each perforated steel bar 5 passes through each corrugated steel partition 1 in the transverse bridge direction, and the two ends of the perforated steel bar 5 abut against the inside of the joint section steel box 3.

[0035] Referring to Figure 4 (1) in the drawings, the corrugated shape of the corrugated steel partitions 1 is a sinusoidal curve.

[0036] Referring to Figure 1 , the inside of the joint section steel box 3 is poured and filled with concrete 6.

[0037] During construction, the following steps are included:

[0038] 1) Process the joint section steel box 3 in the factory. During this process, the upper and lower edges of the corrugated steel partitions 1 are respectively welded to the top plate 301 and the bottom plate 302, and a plurality of perforated steel bars 5 and structural steel bars are arranged in the joint section steel box 3. A concrete pouring opening is reserved on the joint section steel box 3;

[0039] 2) At the construction site, first, a plurality of T-shaped stiffening ribs 4 and stiffening rib base plates 7 are welded to the same plate surface of the bearing plate 2, and then one side wall of the joint section steel box 3 is welded to the other plate surface of the bearing plate 2, to ensure that the wavelength direction of the corrugated steel partitions 1 is consistent with the longitudinal bridge direction;

[0040] 3) At the construction site, the concrete 6 is poured through the concrete pouring opening.

[0041] Example 2:

[0042] The embodiment discloses a steel-concrete hybrid beam joint section using corrugated steel plate force transmission, which comprises a plurality of corrugated steel partitions 1, a pressure plate 2 and a joint section steel box 3.

[0043] Referring to Figure 2 , arrows in the figure represent the longitudinal bridge direction, and the surface of the pressure plate 2 is perpendicular to the longitudinal bridge direction. Referring to Figure 3 , a plurality of T-shaped stiffening ribs 4 are connected to one surface of the pressure plate 2, and the other surface is connected to the side wall of the joint section steel box 3, which is a horizontally arranged square box.

[0044] Referring to Figure 1 or 2, a plurality of corrugated steel partitions 1 are connected between the top plate 301 and the bottom plate 302 of the joint section steel box 3, the plurality of corrugated steel partitions 1 are arranged along the transverse bridge direction, and the wavelength direction of the corrugated steel partition 1 is consistent with the longitudinal bridge direction.

[0045] Referring to Figure 2 , a plurality of elliptical through holes 101 for inserting perforated steel bars 5 are arranged on the corrugated steel partition 1, and the long axis direction of the elliptical through hole 101 is consistent with the wavelength direction of the corrugated steel partition 1. Each of the elliptical through holes 101 is inserted with a plurality of perforated steel bars 5, each of the perforated steel bars 5 passes through each of the corrugated steel partitions 1 along the transverse bridge direction, and both ends of the perforated steel bar 5 abut against the inside of the joint section steel box 3.

[0046] Referring to Figure 1 , the joint section steel box 3 is internally poured and filled with concrete 6.

[0047] During construction, the following steps are included:

[0048] 1) The joint section steel box 3 is processed in the factory; during the process, the upper and lower edges of the plurality of corrugated steel partitions 1 are respectively welded to the top plate 301 and the bottom plate 302, and a plurality of perforated steel bars 5 and construction steel bars are arranged in the joint section steel box 3, and a concrete pouring opening is reserved on the joint section steel box 3;

[0049] 2) At the construction site, a plurality of T-shaped stiffening ribs 4 are welded to one surface of the pressure plate 2, and then one side wall of the joint section steel box 3 is welded to the other surface of the pressure plate 2, so as to ensure that the wavelength direction of the plurality of corrugated steel partitions 1 is consistent with the longitudinal bridge direction;

[0050] 3) At the construction site, the concrete 6 is poured through the concrete pouring opening.

[0051] Embodiment 3:

[0052] The main structure of the embodiment is the same as that of embodiment 2, and further, referring to Figure 4 (2) in the figure, the corrugated shape of the corrugated steel partition 1 is a circular arc curve.

[0053] Example 4

[0054] The main structure of this example is the same as that of Example 3, and further, referring to Figure 1 , the T-shaped stiffening rib 4 includes a flange 401 and a web 402, the plate surface of the web 402 is perpendicular to the horizontal plane, and the length direction of the web 402 is consistent with the longitudinal bridge direction. The end of the web 402 is welded to the pressure bearing plate 2, and the flange 401 is welded to the upper edge of the web 402. The lower edge of the web 402 is welded with a stiffening rib bottom plate 7, and the end of the stiffening rib bottom plate 7 is welded with the pressure bearing plate 2.

[0055] Example 5

[0056] The main structure of this example is the same as that of Example 4, and further, referring to Figure 2 , the web 402 includes a widened section 4021 and an equal-width section 4022, one end of the widened section 4021 is connected with the pressure bearing plate 2, and the other end is connected with the equal-width section 4022.

[0057] The lower edge of the widened section 4021 is horizontal, and the upper edge is inclined away from the pressure bearing plate 2. The end of the widened section 4021 connected with the pressure bearing plate 2 has the maximum width a, the end of the widened section 4021 connected with the equal-width section 4022 has the minimum width b, the width of the equal-width section 4022 is c, and a>b=c>0.

Claims

1. A steel-concrete hybrid girder joint segment employing corrugated steel plate force transfer, characterized by: The utility model relates to a kind of steel box combined section, including several corrugated steel diaphragms (1), pressure plate (2) and combined section steel box (3);The board surface of the pressure plate (2) is perpendicular to longitudinal bridge direction, and one board surface of pressure plate (2) is connected with several T-shaped stiffening ribs (4), another board surface is connected with the side wall of combined section steel box (3), and combined section steel box (3) is horizontally arranged square box;Welding is carried out between the top plate (301) and the bottom plate (302) of the combined section steel box (3) with several corrugated steel diaphragms (1), and the wavelength direction of corrugated steel diaphragm (1) is consistent with longitudinal bridge direction, and several corrugated steel diaphragms (1) are arranged along transverse bridge direction interval;Several oval through holes (101) for the insertion of perforated steel bar (5) are provided on the corrugated steel diaphragm (1), and the long axis direction of oval through hole (101) is consistent with the wavelength direction of corrugated steel diaphragm (1);Several perforated steel bars (5) are inserted in each oval through hole (101), and each perforated steel bar (5) simultaneously passes through each corrugated steel diaphragm (1) along transverse bridge direction, and both ends of perforated steel bar (5) are in abutment with the side wall of combined section steel box (3);Combined section steel box (3) is internally poured and filled with concrete (6); The wave shape of the corrugated steel diaphragm (1) is sinusoidal curve or circular arc curve; The T-shaped stiffening rib (4) includes flange (401) and web (402), and the board surface of web (402) is perpendicular to horizontal plane, and the length direction of web (402) is consistent with longitudinal bridge direction;The end of several webs (402) is welded to pressure plate (2), and flange (401) is welded to the upper edge of web (402);The lower edge of several webs (402) is welded with stiffening rib bottom plate (7), and the end of stiffening rib bottom plate (7) is welded with pressure plate (2); The web (402) includes widening section (4021) and equal-width section (4022), one end of widening section (4021) is connected with pressure plate (2), and the other end is connected with equal-width section (4022);The lower edge of the widening section (4021) is horizontal, and the upper edge is inclined away from pressure plate (2), and the one end of the widening section (4021) connected with pressure plate (2) has maximum width a, the other end of the widening section (4021) connected with equal-width section (4022) has minimum width b, and the width of equal-width section (4022) is c, a>b=c>0.

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