Joint component of corrugated steel web and concrete slab

Abstract

The invention discloses a corrugated steel web and concrete slab joint component which comprises a corrugated steel web and angle steel arranged on the two sides of the corrugated steel web, one side of the angle steel is arranged in a bottom plate, and the other side of the angle steel is attached to and fixedly connected with a straight plate section of the corrugated steel web. The angle steel is arranged on the two sides of the corrugated steel web, the longitudinal rigidity of the angle steel is large, the longitudinal rigidity of the web is effectively improved, it is guaranteed that the corrugated steel web does not deform during construction, the angle steel makes contact with the bottom plate to bear pressure, the anti-drawing effect is achieved, the angle steel serves as a connecting piece, the corrugated steel web and the bottom plate can be effectively connected together, and the corrugated steel web and the bottom plate jointly bear loads; and particularly, when bearing large shearing force and bending moment, the angle steel can effectively improve the bearing capacity of the joint part.

Description

Technical Field

[0001] The invention relates to the technical field of bridge engineering, and in particular to a connection structure of a corrugated steel web and a concrete slab. Background Art

[0002] As a new type of bridge structure, the corrugated steel web composite bridge uses corrugated steel webs instead of traditional concrete webs. The weight of the box girder structure is greatly reduced. At the same time, the constraints between the top and bottom plates are removed, the secondary internal forces are reduced, the efficiency of prestressing is improved, and the problem of web cracking is completely solved. It has been widely used in China in recent years.

[0003] In the composite bridge with corrugated steel web, the shear force is borne by setting connectors between the corrugated steel web and the concrete slab. The joint is the most critical structure of the composite bridge, and it should be ensured that it can be used normally under the action of longitudinal shear force and transverse bending moment.

[0004] The common connection methods between corrugated steel webs and concrete slabs can be divided into flange type and embedded type. In the flange type joint, the flange steel plate is welded to the lower edge of the corrugated steel web and is equipped with connectors such as perforated plates or welding nails. This type of connection structure is currently used more frequently, but the concrete under the lower flange steel plate is poured in reverse, and the pouring density is difficult to ensure. In addition, the connector is in an inverted state, and the connector is subjected to a certain pulling force, and the stress state is relatively unfavorable.

[0005] The biggest advantage of the embedded type combination is that it eliminates the upper flange plate and has a small amount of welding, but the corrugated steel web is easy to deform, which increases the difficulty of processing, transportation, and erection. For this reason, steel bars or perforated steel plates are usually welded along the longitudinal bridge direction on both sides of the steel web extending into the concrete slab. However, the longitudinal stiffness of steel bars and steel strips is small, and the effect of reducing the longitudinal deformation of the corrugated steel web during construction is limited; steel bars can only be connected to the web by welding, and the welds are prone to fatigue problems; when the embedded type joint is used to connect the corrugated steel web to the bottom plate, it needs to bear a certain pull-out force, and the combined steel bars and steel strips have little contribution to resisting pull-out.

[0006] Therefore, it is a technical problem that technical personnel in this field urgently need to solve to design the components of the joint between the corrugated steel web and the concrete slab to overcome the shortcomings of the traditional joint in terms of construction convenience, longitudinal stiffness and bearing performance, to achieve convenient construction of the joint between the corrugated steel web and the concrete slab, reasonable arrangement of the connecting parts and meet the force requirements. Summary of the invention

[0007] In order to solve the above problems, the present invention provides a joint component of a corrugated steel web and a concrete slab, which overcomes the shortcomings of traditional joints in terms of construction convenience, longitudinal stiffness and bearing performance, and achieves convenient construction of the joint between the corrugated steel web and the concrete slab, reasonable arrangement of connecting parts and satisfaction of force requirements.

[0008] To achieve the above object, the present invention provides the following solutions:

[0009] A component of a joint of a corrugated steel web and a concrete slab comprises a corrugated steel web and angle steels arranged on both sides of the corrugated steel web, wherein one side of the angle steel is arranged in a bottom plate and the other side of the angle steel is adhered to and fixedly connected with a straight plate section of the corrugated steel web.

[0010] Preferably, a first through hole is provided on the angle steel located in the area between adjacent straight plate segments.

[0011] Preferably, the first through hole is opened at a middle position on the angle steel in a region between adjacent straight plate segments.

[0012] Preferably, the first through hole is a circular hole, a rectangular hole or a slotted hole.

[0013] Preferably, a second through hole for the bottom plate main reinforcement to pass through is provided in a region of the corrugated steel web close to the angle steel, and the second through holes are arranged at equal intervals at the same height of the corrugated steel web.

[0014] Preferably, ventilation holes are provided on the mating surfaces of the angle steel and the bottom plate.

[0015] Preferably, the air holes are evenly arranged in an array on the mating surface of the angle steel and the base plate.

[0016] Preferably, the length of the mating surface between the angle steel and the bottom plate is smaller than the length of the mating surface between the angle steel and the straight plate segment.

[0017] Preferably, the length of the mating surface between the angle steel and the bottom plate is equal to the length of the fitting surface between the angle steel and the straight plate section.

[0018] Preferably, the angle steel and the straight plate section are connected by high-strength bolts, ordinary bolts or welding.

[0019] Compared with the prior art, the present invention has achieved the following technical effects:

[0020] By arranging angle steels on both sides of the corrugated steel web, the longitudinal stiffness of the angle steels is large, which effectively improves the longitudinal stiffness of the web and ensures that the corrugated steel web does not deform during construction. The angle steels are in contact with the bottom plate to bear pressure and play an anti-pulling role. The angle steels serve as connecting parts and can effectively connect the corrugated steel web and the bottom plate together to bear the load together. Especially when subjected to large shear forces and bending moments, the angle steels can effectively improve the bearing capacity of the joint. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0022] Attached Figure 1 The overall structural intention of the joint component of the corrugated steel web and the concrete slab disclosed in the embodiment of the present invention;

[0023] Attached Figure 2 It is a schematic side view of a component of a joint between a corrugated steel web and a concrete slab disclosed in an embodiment of the present invention;

[0024] Among them, 1. corrugated steel web; 2. bottom plate; 3. angle steel; 4. high-strength bolts; 5. main reinforcement of the bottom plate; 6. first through hole; 7. air hole; 8. second through hole. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] The purpose of the present invention is to provide a joint component of a corrugated steel web and a concrete slab, which overcomes the shortcomings of traditional joints in terms of construction convenience, longitudinal stiffness and bearing performance, and realizes convenient construction of the joint between the corrugated steel web 1 and the concrete slab, reasonable arrangement of connecting parts and satisfaction of force requirements.

[0027] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] refer to Figure 1 and Figure 2The joint component of the corrugated steel web 1 and the concrete slab disclosed in the embodiment of the present invention includes the corrugated steel web 1, angle steels 3 are arranged on both sides of the corrugated steel web 1, one side of the angle steel 3 is arranged in the bottom plate 2, and the other side of the angle steel 3 is attached to and fixedly connected with the straight plate section of the corrugated steel web 1. By arranging the angle steels 3 on both sides of the corrugated steel web 1, the longitudinal stiffness of the angle steel 3 is large, and the longitudinal stiffness of the web is effectively improved, ensuring that the corrugated steel web 1 is not deformed during construction. The angle steel 3 contacts with the bottom plate 2 to bear pressure and play a tensile resistance role. The angle steel 3, as a connecting piece, can effectively connect the corrugated steel web 1 and the bottom plate 2 together to bear the load together. Especially when subjected to large shear force and bending moment, the angle steel 3 can effectively improve the bearing capacity of the structure.

[0029] It should be noted that the connection positions of the corrugated steel web 1 and the angle steel 3 are both embedded in the bottom plate 2 , which can improve the connection strength between the entire bottom plate 2 and the corrugated steel web 1 .

[0030] refer to Figure 1 and Figure 2 As an implementation mode, a first through hole 6 is provided on the angle steel 3 located in the area between adjacent straight plate sections. When the angle steel 3 is buried in the base plate 2, the first through hole 6 can be provided to form a perforated plate shear connector, so that the angle steel 3 bears the longitudinal shear force, thereby improving the longitudinal shear bearing capacity of the joint component.

[0031] refer to Figure 1 and Figure 2 As an implementation method, the first through hole 6 is opened in the middle position of the angle steel 3 between the adjacent straight plate sections, which can ensure that the angle steel 3 can be evenly stressed when it is subjected to the longitudinal bridge shear force, thereby reducing stress concentration.

[0032] refer to Figure 1 and Figure 2 As an implementation manner, the first through hole 6 is a circular hole, a rectangular hole or a slotted hole.

[0033] It should be noted that the diameter of the first through hole 6 is generally 50-70 mm.

[0034] refer to Figure 1 and Figure 2 As an implementation mode, a second through hole 8 for the bottom plate main reinforcement 5 to pass through is opened in the area of ​​the corrugated steel web 1 near the angle steel 3. The second through holes 8 are arranged at equal intervals at the same height of the corrugated steel web 1. By setting the second through holes 8 on the corrugated steel web 1, the bottom plate main reinforcement 5 can pass through the second through holes 8, thereby effectively connecting the bottom plate 2 and the corrugated steel web 1 together, thereby improving the integrity of the structure, so that the entire structure can work better together when bearing loads and bear the load together.

[0035] It should be noted that the diameter of the second through hole 8 is determined according to the size of the bottom plate main rib 5. The diameter of the bottom plate main rib 5 is generally 20-28 mm, and the diameter of the second through hole 8 is generally 50-70 mm. The shape of the opening can be circular, elongated, etc.

[0036] refer to Figure 1 and Figure 2 As an implementation method, air holes 7 are provided on the mating surfaces of the angle steel 3 and the base plate 2. The air holes 7 can ensure that the internal air can be discharged smoothly when the concrete is poured, thereby avoiding concrete defects caused by air stagnation, such as honeycombs, rough surfaces, etc., and thus ensuring the density of the concrete when pouring.

[0037] It should be noted that the diameter of each vent hole 7 is generally 8 to 20 mm.

[0038] refer to Figure 1 and Figure 2 As an implementation method, the air holes 7 are evenly arranged in an array on the mating surface of the angle steel 3 and the base plate 2. The air holes 7 evenly arranged in an array can make the air evenly discharged from the concrete, improve the air permeability, and enhance the stability of the concrete structure. Due to the uniform distribution of the air holes 7, when the concrete is subjected to external force, the stress can be evenly distributed on the entire structure, reducing local stress concentration, thereby improving the stability and durability of the structure.

[0039] refer to Figure 1 and Figure 2 In a preferred embodiment, the length of the mating surface between the angle steel 3 and the base plate 2 is less than the length of the mating surface between the angle steel 3 and the straight plate section, that is, the angle steel 3 is arranged in the form of long limbs and short limbs, the long limbs are in contact with the straight plate section, and the short limbs are matched with the base plate 2. The setting of the long limbs and short limbs of the angle steel 3 can make the slenderness ratio of the connection structure in two directions close, thereby achieving the requirements of material economy, convenient connection and rigidity.

[0040] It should be noted that the size of the angle steel 3 is generally 120-200 mm for the long limb, 80-160 mm for the short limb, and 10-20 mm for the thickness.

[0041] refer to Figure 1 and Figure 2 As an implementation method, the length of the mating surface between the angle steel 3 and the bottom plate 2 is equal to the length of the fitting surface between the angle steel 3 and the straight plate section, and the two sides of the equilateral angle steel 3 are equal, so that when bearing load, the stress can be evenly distributed on the two limbs of the angle steel 3. This uniform force distribution helps to improve the stability and bearing capacity of the structure, reduce the phenomenon of local stress concentration, and thus extend the service life of the structure.

[0042] refer to Figure 1 and Figure 2As a preferred method, the angle steel 3 is connected to the straight plate section by high-strength bolts 4, ordinary bolts or welding, and the angle steel 3 is connected to the web by high-strength bolts 4 and ordinary bolts to avoid fatigue problems caused by welding.

[0043] It should be noted that the types and quantities of high-strength bolts 4 and ordinary bolts are determined according to the force and structural requirements. The bolt diameter is generally 12 to 20 mm, the length is generally 60 to 100 mm, and the bolt spacing is guaranteed to be greater than 3 times the bolt diameter.

[0044] Adaptive changes made according to actual needs are all within the protection scope of the present invention.

[0045] It should be noted that it is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A component for the connection of a corrugated steel web and a concrete slab, characterized in that: It comprises a corrugated steel web, angle steels arranged on both sides of the corrugated steel web, one side of the angle steel is arranged in the bottom plate, and the other side of the angle steel is attached to and fixedly connected with the straight plate section of the corrugated steel web.

2. The connecting member of the corrugated steel web and the concrete slab according to claim 1, characterized in that: A first through hole is provided on the angle steel located in the area between the adjacent straight plate sections.

3. The connecting member of the corrugated steel web and the concrete slab according to claim 2, characterized in that: The first through hole is opened at a middle position on the angle steel in a region between adjacent straight plate segments.

4. The connecting member of the corrugated steel web and the concrete slab according to claim 2, characterized in that: The first through hole is a circular hole, a rectangular hole or a slotted hole.

5. The connecting member of the corrugated steel web and the concrete slab according to claim 1, characterized in that: The corrugated steel web is provided with a second through hole for the main reinforcement of the bottom plate to pass through in the area close to the angle steel, and the second through holes are arranged at the same height of the corrugated steel web at equal intervals.

6. The connecting member of the corrugated steel web and the concrete slab according to claim 1, characterized in that: Air holes are provided on the matching surfaces of the angle steel and the bottom plate.

7. The connecting member of the corrugated steel web and the concrete slab according to claim 6, characterized in that: The ventilation holes are evenly arranged in an array on the matching surface of the angle steel and the bottom plate.

8. The connecting member of the corrugated steel web and the concrete slab according to claim 1, characterized in that: The length of the matching surface between the angle steel and the bottom plate is smaller than the length of the fitting surface between the angle steel and the straight plate section.

9. The connecting member of the corrugated steel web and the concrete slab according to claim 1, characterized in that: The length of the matching surface between the angle steel and the bottom plate is equal to the length of the fitting surface between the angle steel and the straight plate section.

10. The connecting member of the corrugated steel web and the concrete slab according to claim 1, characterized in that: The angle steel and the straight plate section are connected by high-strength bolts, ordinary bolts or welding.

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