CN208039001U - Steel reinforced concrete arch ring chord member construction, steel truss arch and the bridge of a kind of steel truss arch - Google Patents

Abstract

The utility model discloses a steel-concrete arch ring chord structure of a steel truss arch, a steel truss arch and a bridge. The structure includes a pure steel structure, a combined structure and a steel-concrete structure. Transition section, the transition section connects the steel-concrete section, the transition section is a hollow steel box structure with interlayer, the interlayer is filled with concrete structure, there is a bearing plate between the pure steel section and the transition section, and the transition section and the steel-concrete section There is a separation plate, the pure steel section is connected to the pure steel structure, and the steel-concrete section is connected to the steel-concrete structure. The chord structure is used to effectively, economically and conveniently solve the connection problem between the pure steel section and the concrete section of the steel truss arch ring. Through the connection structure of the steel-concrete transition section, the internal force of the pure steel section can be evenly transmitted to the steel concrete section. Finally, it is transmitted to the foundation of the abutment, so that the steel and concrete are jointly stressed, and the force is clear, which can improve the horizontal and vertical rigidity of the long-span steel truss arch, reduce the weight of steel, and reduce the difficulty of transportation and installation of steel members. better.

Description

Steel-concrete arch ring chord structure of steel truss arch, steel truss arch and bridge

technical field

The utility model relates to the technical field of bridge engineering, in particular to a steel-concrete arch ring chord structure of a steel truss arch, a steel truss arch and a bridge.

Background technique

The steel-concrete composite structure (referred to as the steel-concrete structure) is a new type of structure composed of two materials with different properties, steel and concrete. It is a reasonable combination of steel and concrete, giving full play to the high tensile strength of steel. , good plasticity and good compressive performance of concrete to make up for their respective shortcomings; in modern bridge structures, steel-concrete composite structures have increasingly become one of the main directions of bridge development. At present, steel-concrete composite structures are widely used in bridges It is often used on the main girder or bridge tower of cable-stayed bridge suspension bridge. On the steel truss arch of steel arch bridge, there is a steel-concrete composite structure in which the arch ring chord is used as a rigid skeleton and the chord is covered with concrete, but the chord is formed. The back of the bridge does not bear force, the steel cannot be fully utilized, and formwork is required to pour the outsourcing concrete, which is costly and economical.

Utility model content

The purpose of this utility model is to overcome the steel-concrete composite structure existing in the existing steel truss arch that uses the arch ring chord as a rigid skeleton and then wraps concrete in the chord, but the chord does not As a force bearing, the steel cannot be fully utilized, and formwork is required to pour the outsourcing concrete, which is poor in economy. For the above-mentioned shortcomings, a steel-concrete arch ring chord structure, a steel truss arch and a bridge are provided.

In order to realize the above utility model purpose, the utility model provides the following technical solutions:

A steel-concrete arch ring chord structure of a steel truss arch, including a pure steel structure, a combined structure and a steel-concrete structure, the combined structure includes a pure steel section, the pure steel section is connected to a transition section, and the transition section is connected to a steel The mixed section, the transition section is a hollow steel box structure with interlayer, the interlayer is filled with concrete structure, a bearing plate is provided between the pure steel section and the transition section, and the transition section and the A separation plate is provided between the steel-concrete sections, the pure steel section is connected to the pure steel structure, and the steel-concrete section is connected to the steel-concrete structure.

Wherein, the steel-concrete section is a solid steel-concrete structure, and the axis centers of the pure steel section, the transition section and the steel-concrete section intersect.

Adopting the chord structure described in the utility model effectively, economically and conveniently solves the connection problem between the pure steel structure and the concrete structure of the steel truss arch ring. The internal force of the steel structure is evenly transmitted to the steel-concrete structure, and finally to the abutment foundation, so that the steel and concrete are jointly stressed and the force is clear, which can improve the horizontal and vertical rigidity of the long-span steel truss arch, reduce the weight of steel, and reduce the The transportation and installation of steel rods are difficult, and the economy is better.

Preferably, the transition section includes an outer box, the inner surface of the outer box is longitudinally provided with several stiffeners, the longitudinal arrangement means arranged along the direction of the chord structure, and the end of each stiffener The panels are connected, and all adjacent panels are sequentially connected to form a hollow inner box, and the area between the inner box and the outer box forms the interlayer.

Preferably, the steel concrete section includes an outer box body, and several stiffeners are longitudinally arranged on the inner surface of the outer box body.

Preferably, the pure steel section includes an outer box body, several stiffeners are arranged longitudinally on the inner surface of the outer box, and each stiffener end is connected to a panel.

Preferably, the outer box has a rectangular structure, and the outer box includes a top plate, a web and a bottom plate.

Preferably, the outer box is formed by welding among the top plate, the web plate and the bottom plate.

Preferably, at least one concrete pouring hole is provided on the top plate of the transition section, and at least one concrete pouring hole is provided on the top plate of the steel concrete section.

Preferably, several transverse partitions are arranged in the outer box.

Preferably, several shear nails are provided on the inner surface of the outer box to connect the outer box with the concrete, and several PBL shear keys are provided on the stiffener to strengthen the connection between the steel structure and the concrete. to enhance the overall strength.

Preferably, the hollow part of the transition section has a variable cross-section structure, the hollow part of the transition section connected to the side of the pure steel section has a large section, and the hollow section of the transition section connected to the side of the steel-concrete section has a small section .

With this structural arrangement, the internal force of the pure steel section can be gradually and evenly transmitted to the transition section, and then transmitted to the steel-concrete section until the arch foot, so that the force transmission of the overall structure is uniform and the stability of the structure is ensured. sex.

The utility model also provides a steel truss arch, which includes at least three chord structures as described in any one of the above, and each of the chord structures includes a steel-concrete structure, a combined structure, a pure steel structure, a combined structure and The five parts of the steel-concrete structure are connected in sequence, the axis centers of each part meet, and several connecting rods are arranged between two adjacent chord structures.

With the steel truss arch described in the utility model, the chord structure effectively, economically and conveniently solves the connection problem between the pure steel structure and the concrete structure of the steel truss arch ring, and through the steel-concrete combined structure, The internal force of the pure steel structure can be evenly transmitted to the steel-concrete structure, and finally transmitted to the abutment foundation, so that the steel and concrete are jointly stressed, and the force is clear, which can improve the horizontal and vertical rigidity of the long-span steel truss arch, The weight of steel is reduced, the difficulty of transportation and installation of steel rods is reduced, and the economy is better.

Preferably, the corresponding ends of each of said transition sections on each of said chord formations lie in the same vertical plane.

By adopting this structural arrangement, the stress of each chord structure on the steel truss arch can be substantially uniform, and the bearing capacity of the overall structure can be increased, with good effect.

The utility model also provides a bridge using the steel truss arch as described in any one of the above, and the steel truss arch is connected to the girders through pillars, tie rods or suspension cables.

With the bridge described in the present invention, the chord structure effectively, economically and conveniently solves the connection problem between the pure steel structure and the concrete structure of the steel truss arch ring. Through the combination structure of steel and concrete, the The internal force of the pure steel structure is evenly transmitted to the steel-concrete structure, and finally to the abutment foundation, so that the steel and concrete are jointly stressed, and the force is clear, which can improve the horizontal and vertical stiffness of the long-span steel truss arch and reduce the steel The weight reduces the difficulty of transportation and installation of steel rods, and the economy is better.

Preferably, the bridge is a vertical arch bridge, a central arch bridge or a downward arch bridge.

In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

1. Using the chord structure described in the utility model, the connection problem between the pure steel structure and the concrete structure of the steel truss arch ring is solved effectively, economically and conveniently. The internal force of the pure steel structure is evenly transmitted to the steel-concrete structure, and finally to the abutment foundation, so that the steel and concrete are jointly stressed, and the force is clear, which can improve the horizontal and vertical stiffness of the long-span steel truss arch and reduce the weight of steel , to reduce the difficulty of transportation and installation of steel rods, and the economy is better;

2. Using the chord structure described in the present invention, the hollow part of the transition section is a variable cross-section structure, and the hollow part of the transition section connected to the side of the pure steel section has a large section, and the section connected to the steel-concrete section The hollow part of the transition section on the side has a small cross-section. With this structural arrangement, the internal force of the pure steel section can be gradually and evenly transmitted to the transition section, and then transmitted to the steel-concrete section until the arch foot, so that The overall structure is uniformly transmitted to ensure the stability of the structure;

3. Using the steel truss arch described in the present invention, the chord structure effectively, economically and conveniently solves the connection problem between the pure steel structure and the concrete structure of the steel truss arch ring, through the combination of steel and concrete structure, the internal force of the pure steel structure can be evenly transmitted to the steel-concrete structure, and finally to the abutment foundation, so that the steel and concrete are jointly stressed, and the force is clear, which can improve the horizontal and vertical strength of the long-span steel truss arch. Rigidity, reduce the weight of steel, reduce the difficulty of transportation and installation of steel rods, and have better economy;

4. Using the steel truss arch described in the present invention, the corresponding ends of each of the transition sections on each of the chord structures are located in the same vertical plane. With this structural arrangement, it is possible to make the The stress of each chord structure on the steel truss arch is basically uniform, which increases the bearing capacity of the overall structure and has a good effect;

5. Using the bridge described in the present invention, the chord structure effectively, economically and conveniently solves the connection problem between the pure steel structure and the concrete structure of the steel truss arch ring, through the combination structure of steel and concrete, The internal force of the pure steel structure can be evenly transmitted to the steel-concrete structure, and finally transmitted to the abutment foundation, so that the steel and concrete are jointly stressed, and the force is clear, which can improve the horizontal and vertical rigidity of the long-span steel truss arch, The weight of steel is reduced, the difficulty of transportation and installation of steel rods is reduced, and the economy is better.

Description of drawings

Fig. 1 is the structural representation of the chord structure described in the utility model;

Figure 2 is a partially enlarged view of Figure 1;

Fig. 3 is a schematic structural diagram of the A-A direction of Fig. 1;

Fig. 4 is a schematic structural diagram of the B-B direction of Fig. 1;

Fig. 5 is a C-C sectional view of Fig. 1;

Fig. 6 is a D-D sectional view of Fig. 1;

Fig. 7 is the E-E sectional view of Fig. 1;

Fig. 8 is the F-F sectional view of Fig. 1;

Fig. 9 is a structural schematic diagram of the steel truss arch and the bridge described in the utility model.

Marks in the figure: 01-pure steel structure, 02-combined structure, 03-steel-concrete structure, 1-pure steel section, 2-transition section, 21-top plate, 22-web plate, 23-bottom plate, 24-stiffener, 25-Panel, 26-Shear nail, 27-PBL shear key, 28-Pouring hole, 3-Steel concrete section, 4-Interlayer, 5-Bearing plate, 6-Separation plate, 7-Diaphragm, 8-bolt, 9-connecting rod.

Detailed ways

The utility model will be further described in detail below in conjunction with test examples and specific embodiments. However, it should not be understood that the scope of the above-mentioned themes of the present utility model is limited to the following embodiments, and all technologies realized based on the content of the present utility model belong to the scope of the present utility model.

Example 1

As shown in Figures 1-8, a steel-concrete arch ring chord structure of a steel truss arch according to the utility model includes a pure steel structure 01, a combined structure 02 and a steel-concrete structure 03.

The combination structure 02 includes a pure steel section 1, the pure steel section 1 is connected to a transition section 2, and the transition section 2 is connected to a steel-concrete section 3, and the transition section 2 is a hollow steel box structure with an interlayer 4, the The interlayer 4 is filled with a concrete structure, a bearing plate 5 is provided between the pure steel section 1 and the transition section 2, and a separation plate 6 is provided between the transition section 2 and the steel-concrete section 3. The pure steel section 1 is connected to the pure steel structure 01, and the steel-concrete section 3 is connected to the steel-concrete structure 03.

Wherein, the steel-concrete section 3 is a solid steel-concrete structure, and the axis centers of the pure steel section 1 , the transition section 2 and the steel-concrete section 3 intersect.

As a preferred solution of this embodiment, the transition section 2 includes an outer box, and several stiffeners 24 are longitudinally arranged on the inner surface of the outer box, and the longitudinal arrangement means that they are arranged along the direction of the chord structure, The end of each stiffener 24 is connected to the panel 25, and all the adjacent panels 25 are sequentially connected to form a hollow inner box, and the area between the inner box and the outer box forms the The interlayer 4, the steel-concrete section 3 includes an outer box, and several stiffeners 24 are longitudinally arranged on the inner surface of the outer box, and the pure steel section 1 includes an outer box, and several stiffeners are arranged longitudinally on the inner surface of the outer box Ribs 24, the ends of each stiffening rib 24 are connected to the panels 25, the outer box is a rectangular structure, the outer box includes a top plate 21, a web 22 and a bottom plate 23, the top plate 21, the web 22 The outer box body is formed by welding with the bottom plate 23, the top plate 21 of the transition section 2 is provided with at least one concrete pouring hole 28, and the top plate 21 of the steel concrete section 3 is provided with at least one Concrete pouring holes 28, several diaphragms 7 are arranged in the outer box body, several shear nails 26 are arranged on the inner surface of the outer box body, and the outer box body is connected with the concrete as a whole, and the stiffeners 24 is provided with several PBL shear keys 27 to strengthen the connection between the steel structure and the concrete, so as to enhance the overall stress. The cross-section of the hollow part of the transition section 2 is large, and the cross-section of the hollow part of the transition section 2 connected to the side of the steel-concrete section 3 is small. With this structural arrangement, the internal force of the pure steel section 1 can be gradually and evenly transmitted. in the transition section 2, and then transmitted to the steel-concrete section 3 until the arch foot, so that the force transmission of the overall structure is uniform and ensures the stability of the structure. The pure steel section 1 is connected to the pure steel section 1 through high-strength bolts 8 Steel structure 01, the steel-concrete section 3 is connected to the steel-concrete structure 03 through high-strength bolts 8 .

Using the chord structure described in the utility model, the connection problem between the pure steel structure 01 and the concrete structure of the steel truss arch ring is solved effectively, economically and conveniently. The internal force of the pure steel structure 01 is evenly transmitted to the steel-concrete structure 03, and finally to the foundation of the abutment, so that the steel and concrete bear the force together, and the force is clear, which can improve the horizontal and vertical stiffness of the long-span steel truss arch and reduce the The weight of steel reduces the difficulty of transportation and installation of steel rods, and the economy is better.

Example 2

As shown in FIG. 9 , a steel truss arch according to the present invention includes four chord structures as described in Embodiment 1.

Each chord structure includes steel-concrete structure 03, combined structure 02, pure steel structure 01, combined structure 02 and steel-concrete structure 03, which are sequentially connected. The chord structures described above form a rectangular structure, and several connecting rods 9 are arranged between two adjacent chord structures.

As a preferred solution of this embodiment, the corresponding ends of each of the transition sections 2 on each of the chord structures are located in the same vertical plane. With this structural arrangement, the steel truss arch can The stress of each of the chord structures described above is basically uniform, which increases the bearing capacity of the overall structure, and the effect is good.

Using the steel truss arch described in the utility model, the chord structure effectively, economically and conveniently solves the connection problem between the pure steel structure 01 and the concrete structure of the steel truss arch ring. 02, the internal force of the pure steel structure 01 can be evenly transmitted to the steel-concrete structure 03, and finally transmitted to the foundation of the abutment, so that the steel and concrete can bear the force together, and the force is clear, which can improve the strength of the long-span steel truss arch. Horizontal and vertical rigidity, reducing the weight of steel, reducing the difficulty of transportation and installation of steel rods, and the economy is better.

Example 3

As shown in Figure 9, a bridge described in the present invention uses the steel truss arch as described in Embodiment 2.

As a preferred solution of this embodiment, the bridge is an overhead arch bridge, and the steel truss arch is connected to the beams through pillars.

Using the bridge described in the present invention, the chord structure effectively, economically and conveniently solves the connection problem between the pure steel structure 01 and the concrete structure of the steel truss arch ring, and through the steel-concrete combination structure 02, The internal force of the pure steel structure 01 can be evenly transmitted to the steel-concrete structure 03, and finally to the foundation of the abutment, so that the steel and concrete are jointly stressed, and the force is clear, which can improve the horizontal and vertical dimensions of the long-span steel truss arch. Rigidity, reduce the weight of steel, reduce the difficulty of transportation and installation of steel rods, and the economy is better.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present utility model shall be included in this utility model. within the scope of protection of utility models.

Claims (10)

1. A steel-concrete arch ring chord structure of a steel truss arch, characterized in that it comprises a pure steel structure (01), a combination structure (02) and a steel-concrete structure (03), and the combination structure (02) comprises a pure A steel section (1), the pure steel section (1) is connected to a transition section (2), the transition section (2) is connected to a steel-concrete section (3), and the transition section (2) is an interlayer (4) Hollow steel box structure, the interlayer (4) is filled with concrete structure, a pressure bearing plate (5) is provided between the pure steel section (1) and the transition section (2), and the transition section (2 ) and the steel-concrete section (3) is provided with a separation plate (6), the pure steel section (1) is connected to the pure steel structure (01), and the steel-concrete section (3) is connected to the steel Mixed construction (03). 2. The chord structure according to claim 1, characterized in that, the transition section (2) comprises an outer box, and several stiffeners (24) are longitudinally arranged on the inner surface of the outer box, each of the stiffeners The ends of the ribs (24) are connected to the panels (25), and all the adjacent panels (25) are sequentially connected to form a hollow inner box, and the area between the inner box and the outer box forms the The interlayer (4). 3. The chord structure according to claim 1, characterized in that, the steel-concrete section (3) comprises an outer box, and several stiffeners (24) are arranged longitudinally on the inner surface of the outer box. 4. The chord structure according to claim 1, characterized in that, the pure steel section (1) comprises an outer box, and several stiffeners (24) are longitudinally arranged on the inner surface of the outer box, and each of the The ends of the stiffeners (24) are connected to the panels (25). 5. The chord structure according to any one of claims 2-4, characterized in that, the outer box is a rectangular structure, and the outer box includes a top plate (21), a web (22) and a bottom plate ( twenty three). 6. The chord structure according to any one of claims 2-4, characterized in that, several transverse partitions (7) are arranged in the outer box. 7. The chord structure according to any one of claims 2-3, characterized in that, the inner surface of the outer box is provided with several shear nails (26), and the outer box is connected to the concrete as a whole, Several PBL shear keys (27) are arranged on the stiffener (24). 8. The chord structure according to any one of claims 1-4, characterized in that, the hollow part of the transition section (2) is a variable cross-section structure, connecting all the parts on one side of the pure steel section (1) The cross-section of the hollow part of the transition section (2) is large, and the cross-section of the hollow part of the transition section (2) connected to one side of the steel-concrete section (3) is small. 9. A steel truss arch, characterized in that it comprises at least three chord structures as claimed in any one of claims 1-8, each said chord structure comprising a steel-concrete structure (03), a combined structure ( 02), pure steel structure (01), combined structure (02) and steel-concrete structure (03) are connected sequentially, and several connecting rods (9) are arranged between two adjacent chord structures . 10. A bridge, characterized in that the steel truss arch according to claim 9 is used, and the steel truss arch is connected to the girders through pillars, tie rods or suspension cables.