CN215518308U - Bone type high-performance concrete segment assembled beam bridge - Google Patents
Bone type high-performance concrete segment assembled beam bridge Download PDFInfo
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- CN215518308U CN215518308U CN202121885795.0U CN202121885795U CN215518308U CN 215518308 U CN215518308 U CN 215518308U CN 202121885795 U CN202121885795 U CN 202121885795U CN 215518308 U CN215518308 U CN 215518308U
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Abstract
The utility model discloses a bone-type high-performance concrete segment assembled beam bridge, which is characterized in that a reserved through hole is formed in a bridge deck, the section of a main beam is I-shaped, and arc-shaped supports are symmetrically welded on two sides of the main beam; the shear connecting piece is pre-embedded in the top surfaces of the main beam and the arc-shaped support and forms a vertical protruding extension; transferring each prefabricated component to on-site assembly and pouring wet joints to form a bridge; the utility model utilizes the compression of the bridge deck and the arc-shaped support and the tension of the main beam; the cantilever bracket on the upper flange of the main beam provides support and shear resistance for the arc-shaped support, and the bridge deck is utilized to provide longitudinal connection for the arc-shaped support, so that the integral rigidity of the member can be effectively ensured. The high-performance concrete is adopted to realize the lightness and thinness of the member, is easy to hoist and transport, has high assembly degree, can be quickly constructed into a bridge, and has reliable bearing performance and strong durability.
Description
Technical Field
The utility model relates to the technical field of bridge engineering, in particular to a high-performance concrete segment assembled beam bridge.
Background
In recent years, the bridge structural style has been shifted toward diversification along with the development of high-performance concrete materials and steel structures. The combined beam bridge is a structure formed by connecting a main beam and a bridge deck through a shear connector. The combined beam bridge has the characteristic of giving play to different stress behaviors of the main beam and the bridge deck, so that different materials can be combined and respectively used in the main beam and the bridge deck of the combined beam, and the combined beam bridge has higher economic advantages.
The traditional precast concrete structure is big in self-weight and single in structural form, and is difficult to realize a novel and light bridge structure. Compared with a concrete bridge, the steel-concrete composite bridge is lighter, but the concrete slab in the composite beam is more prone to crack than the deck slab of the common concrete beam because the steel beam and the concrete slab have different temperature gradients when the environment changes and the rigidity difference between the concrete slab and the steel beam is too large.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the problems in the prior art and provides a bone type high-performance concrete section assembled beam bridge, which has better effects on economy, construction convenience degree, assembly degree, appearance modeling, stress performance and reliability in a new structural form so as to be suitable for specific application of bridges with medium and small spans.
The utility model adopts the following technical scheme for solving the technical problems:
the structure of the bone-type high-performance concrete section assembled composite beam bridge is characterized in that each composite member comprises:
the main beam is a longitudinal beam with an I-shaped section; the arc-shaped support is a herringbone support consisting of a horizontal upper chord and an arc-shaped lower chord, and the arc-shaped support is symmetrically welded on two sides of the main beam; the end beam is formed by vertical die casting at the end part of the main beam, and the top surfaces of the main beam, the end beam and the upper chord of the arc-shaped support are coplanar; the shear force connecting piece is a vertically protruding embedded component and is respectively arranged on the top surface of the main beam, the top surface of the upper chord of the arc-shaped support and the top surface of the end cross beam; the bridge deck is provided with vertical through holes;
the bridge deck is stacked on the top surface of the main beam, the shear connecting piece on the top surface of the main beam protrudes and extends into the vertical through hole of the bridge deck, and concrete is cast in situ in the vertical through hole to realize connection; the top surface of the upper chord of the end lap arc of the bridge deck slab props, form the wet seam between two bridge deck slabs that are vertically adjacent to there are the shear force connecting piece that the arc propped the top surface of the upper chord, and the shear force connecting piece that the girder top surface corresponds on the position is protruding to stretch in the wet seam, realizes connecting to wet seam cast in situ concrete.
The structure of the bone-type high-performance concrete segmental assembled composite beam bridge is also characterized in that: cantilever brackets are respectively arranged on two sides of the flange of the main beam, the arc support middle upper chord is welded on the upper flange side by the upper flange cantilever bracket as a support, and the arc support middle lower chord is directly welded on the lower flange cantilever bracket side.
The structure of the bone-type high-performance concrete segmental assembled composite beam bridge is also characterized in that: the main beam is prefabricated integrally or in sections and assembled by stretching longitudinal external prestressing tendons on site.
The structure of the bone-type high-performance concrete segmental assembled composite beam bridge is also characterized in that: the protruding height of the shear connector is not higher than the top surface height of the bridge deck.
Compared with the prior art, the utility model has the beneficial effects that:
1. the bridge deck and the arc-shaped supports are pressed, the main beam is pulled, and the bridge deck provides longitudinal connection for the arc-shaped supports, so that the overall rigidity of the member is effectively ensured; the bearing is definite in stress, and has reliable bearing performance and durability.
2. According to the utility model, the main beam and the arc-shaped support are high-performance concrete members, compared with the traditional common reinforced concrete structure, the high-performance reinforced concrete structure has higher strength indexes, and the section of the main beam can be slender and light and thin under the same span and load condition, so that the material is saved, the resource saving is realized, and the manufacturing cost is saved;
3. the utility model is a permeable structure, takes the bridge deck as a longitudinal connecting beam, can greatly save materials while ensuring the stress of the structure, realizes the lightening of sections, is beneficial to the earthquake resistance of the structure and the support of lower structures, and is easy to hoist and transport components;
4. the bridge deck, the main beam and the arc-shaped supports are prefabricated components, so that the bridge can be quickly assembled on site, and the construction period is greatly saved; it has light and beautiful appearance and good decorative effect.
Drawings
FIG. 1 is an elevation view of a high performance concrete segment assembled composite beam bridge of the present invention;
FIG. 2 is a structural view of a main beam, an end beam and an arc support in the present invention;
FIG. 3 is a structural view of the connection between the main beam and the arc brace of the present invention;
FIG. 4 is a structural view of a bridge deck according to the present invention;
FIG. 5 is a view showing the construction of the arc brace according to the present invention;
fig. 6 is a structural view of a main beam in the present invention.
Reference numbers in the figures: 1 bridge deck, 2 main girders, 2a connecting steel plates, 3 arc-shaped supports, 4 end cross beams and 5 shear connectors.
Detailed Description
Referring to fig. 1, the combined members of the bone-type high-performance concrete segment assembled beam bridge of the present embodiment are respectively:
the main beam 2 shown in fig. 3 and 6 is a longitudinal beam with an i-shaped section; according to the span of the bridge, the main beam 2 can be prefabricated integrally or in sections, and is assembled by tensioning longitudinal external prestressed bundles on site.
The arc-shaped support 3 shown in fig. 2 and 5 is a herringbone support formed by a horizontal upper chord and an arc-shaped lower chord, and the arc-shaped support 3 is symmetrically welded on two sides of the main beam 2 to form a bone-shaped structure similar to a vertebra.
The end cross beam 4 shown in fig. 1 and 2 is formed by vertical die casting at the end of the main beam 2, and the top surfaces of the main beam 2, the end cross beam 4 and the upper chord of the arc-shaped support 3 are all arranged to be coplanar.
The shear connectors 5 shown in fig. 2 and 3 are embedded members protruding vertically, and are respectively arranged on the top surface of the main beam 2, the top surfaces of the upper chords of the arc-shaped struts 3, and the top surfaces of the end cross beams 4; the protruding height of the shear connector 5 is not higher than the top surface height of the bridge deck 1; the shear connector 5 is a steel bar, a shear nail or a section steel component.
The bridge deck 1 shown in fig. 1 and 4 is distributed with vertical through holes; the bridge deck 1 is stacked on the top surface of the main beam 2, the shear connecting piece on the top surface of the main beam protrudes and extends into the vertical through hole of the bridge deck, and concrete is cast in situ in the vertical through hole to realize connection; the end of the bridge deck 1 is lapped with the top surface of the upper chord of the arc-shaped support 3, a wet joint is formed between two bridge decks 1 which are longitudinally adjacent, the shear connecting piece on the top surface of the upper chord of the arc-shaped support and the shear connecting piece on the corresponding position of the top surface of the main beam are protruded in the wet joint, and the connection is realized aiming at the wet joint cast-in-place concrete; aiming at the bridge deck boards 1 which are respectively arranged at two ends, one end of the bridge deck board 1 at the corresponding position is lapped with the top surface of the upper chord of the arc-shaped support 3, and the other end is lapped with the top surface of the end beam 4, so that the connection is realized in the same way.
In specific implementation, the corresponding technical measures also include:
the main beam 2 and the arc-shaped support 3 are both high-performance concrete prefabricated components; the end beam 4 is a reinforced concrete cast-in-place member or a high-performance concrete cast-in-place member; the bridge deck 1 is a reinforced concrete prefabricated part or a high-performance concrete prefabricated part; the high-performance concrete is concrete with the standard value of the axial tensile strength of the member not lower than 6MPa and the standard value of the axial compressive strength of the member not lower than 80 MPa; ordinary concrete refers to concrete having a strength grade of C40 or above.
In order to realize the supporting connection of the arc support 3, cantilever brackets are respectively arranged on two sides of the flange of the main beam 2, an upper chord in the arc support 3 is welded on the upper flange side by taking the upper flange cantilever bracket as a support, and a lower chord in the arc support 3 is directly welded on the lower flange cantilever bracket side; the arc strut is characterized in that a connecting steel plate is fixedly welded between an arc strut 3 and a main beam 2 and is a pre-embedded component, and the arc strut connecting steel plate comprises an arc strut pre-embedded on the end faces of an upper chord and a lower chord in the arc strut 3 and a main beam connecting steel plate pre-embedded on the corresponding positions of the cantilever bracket side of an upper flange and a lower flange of the main beam.
The assembly of the bone type high-performance concrete section assembled combined beam bridge is realized according to the following steps:
step 1: the prefabricated components of the bridge deck, the main beam and the arc-shaped support are prefabricated in a factory, and the shear connecting piece and the connecting steel plate are pre-embedded when the prefabricated components are prefabricated in the factory; each prefabricated part is transported to the site in a split manner;
step 2: in the field, the arc-shaped support and the main beam are connected by welding through the connecting steel plate;
and step 3: the end cross beam is cast by a formwork in situ to form an integrated upper structure of the main beam, the arc-shaped support and the end cross beam;
and 4, step 4: integrally hoisting the integrated upper structure to the pier top, or hoisting the integrated upper structure to the pier top in sections according to the girder sections, and splicing the girder sections on the pier top;
and 5: and hoisting the bridge deck on the integrated upper structure, and pouring concrete in the vertical through holes and the wet joints of the bridge deck at the positions of the shear connectors to realize connection.
Step 6: and paving to form the bridge.
Claims (4)
1. The utility model provides a girder bridge is assembled to bone type high performance concrete segment, characterized by each combined member includes:
the main beam (2) is a longitudinal beam with an I-shaped section;
the arc-shaped support (3) is a herringbone support formed by a horizontal upper chord and an arc-shaped lower chord, and the arc-shaped support (3) is symmetrically welded on two sides of the main beam (2);
the end beam (4) is formed by vertically moulding the end part of the main beam (2) in a pouring way, and the top surfaces of the main beam (2), the end beam (4) and the upper chord of the arc-shaped support (3) are coplanar;
the shear force connecting piece (5) is a vertically protruding embedded component and is respectively arranged on the top surface of the main beam (2), the top surface of the upper chord of the arc-shaped support (3) and the top surface of the end cross beam (4);
the bridge deck (1) is distributed with vertical through holes; the bridge deck (1) is stacked on the top surface of the main beam (2), the shear force connecting piece on the top surface of the main beam protrudes and extends into the vertical through hole of the bridge deck, and concrete is cast in the vertical through hole to realize connection; the top surfaces of the upper chords of the arch struts (3) are lapped at the ends of the bridge deck boards (1), wet joints are formed between two longitudinally adjacent bridge deck boards (1), shear connectors of the top surfaces of the upper chords are propped by the arcs, and the shear connectors on the corresponding positions of the top surfaces of the main beams are convexly stretched in the wet joints, so that the connection is realized by pouring concrete on site for the wet joints.
2. The bone-type high-performance concrete segmental assembled beam bridge according to claim 1, which is characterized in that: cantilever corbels are respectively arranged on two sides of the flange of the main beam (2), the upper chord of the arc support (3) is welded on the upper flange side for supporting, and the lower chord of the arc support (3) is directly welded on the lower flange cantilever corbel side.
3. The bone-type high-performance concrete segmental assembled beam bridge according to claim 1, which is characterized in that: the main beam (2) is prefabricated integrally or in sections and assembled by stretching longitudinal external prestressed tendons on site.
4. The bone-type high-performance concrete segmental assembled beam bridge according to claim 1, which is characterized in that: the protruding height of the shear connector (5) is not higher than the top surface height of the bridge deck (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121885795.0U CN215518308U (en) | 2021-08-12 | 2021-08-12 | Bone type high-performance concrete segment assembled beam bridge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121885795.0U CN215518308U (en) | 2021-08-12 | 2021-08-12 | Bone type high-performance concrete segment assembled beam bridge |
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| Publication Number | Publication Date |
|---|---|
| CN215518308U true CN215518308U (en) | 2022-01-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202121885795.0U Active CN215518308U (en) | 2021-08-12 | 2021-08-12 | Bone type high-performance concrete segment assembled beam bridge |
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2021
- 2021-08-12 CN CN202121885795.0U patent/CN215518308U/en active Active
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