CN112482221A - Longitudinal continuous structure and construction method of simply supported steel-concrete composite beam hogging moment area bridge deck slab - Google Patents
Longitudinal continuous structure and construction method of simply supported steel-concrete composite beam hogging moment area bridge deck slab Download PDFInfo
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- CN112482221A CN112482221A CN202011291163.1A CN202011291163A CN112482221A CN 112482221 A CN112482221 A CN 112482221A CN 202011291163 A CN202011291163 A CN 202011291163A CN 112482221 A CN112482221 A CN 112482221A
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/12—Grating or flooring for bridges; Fastening railway sleepers or tracks to bridges
- E01D19/125—Grating or flooring for bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/02—Piers; Abutments ; Protecting same against drifting ice
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/06—Arrangement, construction or bridging of expansion joints
- E01D19/067—Flat continuous joints cast in situ
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
Abstract
The invention belongs to the field of bridge construction, and particularly relates to a longitudinal continuous structure and a construction method of a bridge deck in a hogging moment area of a simply supported steel-concrete composite beam. The bridge comprises a positive bending moment area bridge deck, steel beams, negative bending moment area concrete connecting plates, shear connectors, non-combined structures, bent caps, negative bending moment area longitudinal steel bars and positive bending moment area longitudinal steel bars; the bridge deck in the positive bending moment area and the steel beam form a combined structure to bear force together; the hogging moment area concrete connecting plate is made of high-performance concrete materials, spans above two adjacent steel beams, and releases the constraint between the steel beams and the bridge deck slab through a non-combined structure; the hogging moment area concrete connecting plate is connected with the steel beam through a shear connector at the joint section, and the non-joint section and the steel beam are separated and debonded by waterproof materials such as asphalt felt and the like. The invention reduces the rigidity of the continuous section by releasing the restraint between the bridge deck slab and the steel beam at the support, thereby reducing the stress of the bridge deck slab in the hogging moment area and improving the durability and the driving comfort of the bridge.
Description
Technical Field
The invention belongs to the field of bridge construction, and particularly relates to a longitudinal continuous structure and a construction method of a bridge deck in a hogging moment area of a simply supported steel-concrete composite beam.
Background
A simply supported steel-concrete composite beam bridge is a middle and small span bridge form which is widely applied in China. However, the simply supported steel-concrete composite beam bridge needs to be provided with an expansion joint structure, and the expansion joint structure has the disadvantages of complex construction, poor driving comfort, high maintenance cost and the like. In addition, the traditional simply supported variable continuous steel-concrete composite beam is a solution for avoiding the disadvantages of expansion joints, but the simply supported variable continuous beam bridge adopts a full-section continuous structure, is essentially a continuous beam bridge, has large section rigidity and negative bending moment, and is often unavoidable in the cracking of a concrete bridge deck; meanwhile, the simple support is changed into a complex continuous structure, the construction steps are complicated, and the workload is large.
The high-performance concrete is concrete which takes sustainable development and durability as basic requirements and is suitable for industrial production and construction, and represents the development direction of concrete technology. High performance concrete is characterized by high durability, high workability, and high strength. The most important technical means for achieving high performance of concrete is to use a composite superplasticizer and an ultrafine mineral admixture. Compared with common concrete, the high-performance concrete has the advantages of increased raw material components, improved uniformity and compactness and improved performance.
Chinese patent CN210712557U discloses a hogging moment zone UHPC treated steel-concrete composite structure, which adopts Ultra High Performance Concrete (UHPC) bridge deck slab in the hogging moment zone length, and welds (bolts) the upper flange of the steel beam at the pier top. This type of connection is a rigid connection, which resists cracking due to the high strength of UHPC, but does not actually improve the load on the deck slab in the hogging moment region, and too strong restraint may cause stress concentration and support seat separation.
Disclosure of Invention
The invention aims to provide a concrete bridge deck slab longitudinal continuous structure in a hogging moment area of a simply supported steel-concrete composite beam, which reduces the rigidity of a continuous section in a mode of releasing the restraint of a steel beam and the bridge deck slab, achieves the aim of reducing the stress of the section of the bridge deck slab in the hogging moment area, and further simplifies the continuous structure and construction, improves the crack resistance of the bridge deck slab and improves the driving comfort on the premise of meeting the continuous function of a bridge deck.
The technical solution for realizing the purpose of the invention is as follows: a longitudinal continuous structure of a concrete bridge deck in a bending moment area of a simply supported steel-concrete composite beam is characterized by comprising a bridge deck in a positive bending moment area, a steel beam, a concrete connecting plate in a negative bending moment area, a shear connecting piece, a non-combined structure, a cover beam, longitudinal steel bars in the negative bending moment area and longitudinal steel bars in the positive bending moment area;
the hogging moment district concrete connecting plate comprises non-joint section and the joint section that is located non-joint section both sides, the concrete connecting plate strides and establishes in the top of two adjacent girder steels, and is connected with the girder steel at the joint section of both sides, releases the restraint between concrete connecting plate and the girder steel at non-joint section.
Furthermore, the hogging moment area concrete connecting plate is made of high-performance concrete materials.
Further, the length of the hogging moment area concrete connecting plate is L1, the length of a non-combined section is L2, and the length of a combined section is (L1-L2)/2; the length L2 of the unbonded section is larger than the distance between two steel beams.
Furthermore, the hogging moment area concrete connecting plate is connected between the combining section and the steel beam through a shear connecting piece;
and a non-combined structure is arranged between the non-combined section and the steel beam of the hogging moment area concrete connecting plate for separation and debonding.
Further, the shear connector is a stud or a section steel or an open pore steel plate.
Further, the unbonded structure is a felt or other waterproof material.
Furthermore, a cast-in-place connection mode is adopted between the hogging moment area concrete connecting plate and the positive bending moment area bridge deck;
or, the hogging moment area concrete connecting plate and the positive bending moment area bridge deck plate are connected in a prefabricated mode, namely, the non-combined section adopts a prefabricated plate, and the combined section adopts a cast-in-place joint.
Furthermore, the hogging moment region longitudinal steel bar and the positive bending moment region longitudinal steel bar are connected at the joint section of the hogging moment region concrete connecting plate.
Further, the bent cap is an exposed bent cap.
Furthermore, the bent cap beam or the hidden bent cap beam is provided with a cushion layer between the hogging moment area concrete connecting plate and the top of the hidden bent cap beam.
A construction method of the above continuous structure includes the steps of:
step (1): pre-burying a shear connector in a steel beam top plate;
step (2): erecting a steel beam to form a simple steel beam structure;
and (3): mounting a positive bending moment area concrete bridge deck, so that the positive bending moment area concrete bridge deck and the simply supported steel beam structure in the step (2) form a combined structure through a shear connector;
and (4): arranging a non-bonding structure at a position corresponding to the non-bonding section of the hogging moment area concrete connecting plate on the top surface of the steel beam of the combined structure for separation and de-bonding; a cushion layer is required to be arranged at the top of the hidden capping beam;
and (5): binding longitudinal steel bars in a hogging moment area and pouring a concrete connecting plate in the hogging moment area in a cast-in-place connection mode; for the prefabricated connection mode, the prefabricated plates of the non-joint section of the hogging moment area are hoisted firstly, and then the wet joints of the joint section are poured.
Compared with the prior art, the invention has the remarkable advantages that:
the invention reduces the rigidity of the continuous section by releasing the restraint of the bridge deck slab in the hogging moment area and the steel beam at the support, thereby greatly reducing the stress of the bridge deck slab in the hogging moment area, and simultaneously, the invention further improves the stress performance of the bridge deck slab in the hogging moment area by adopting high-performance concrete as the material of the connecting section, can effectively avoid the development of cracks, and improves the durability and the driving comfort of the bridge.
The invention is applicable to the scheme that the lower part structure is an exposed cover beam and a hidden cover beam, and the hogging moment area concrete connecting plate can adopt different modes such as cast-in-place or prefabrication.
Drawings
FIG. 1 is a schematic view showing a longitudinally continuous structure of a hogging moment region concrete deck slab of a steel-concrete composite beam suitable for an exposed cover beam according to the present invention.
FIG. 2 is a schematic view showing a longitudinally continuous construction of a hogging moment region concrete deck slab of a steel-concrete composite girder for a hidden bent cap according to the present invention.
Description of reference numerals:
the method comprises the following steps of 1-positive bending moment area bridge deck slab, 2-steel beam, 3-negative bending moment area concrete connecting plate, 4-shear connecting piece, 5-non-combined structure, 6-bent cap beam, 7-negative bending moment area longitudinal steel bar and 8-positive bending moment area longitudinal steel bar.
Detailed Description
The present invention is described in further detail below with reference to the attached drawing figures.
In the midspan positive bending moment section, the steel beam and the concrete bridge deck form a combined section to bear force together; and in the hogging moment section of the support, the concrete connecting plate in the hogging moment area is arranged above the steel beam in a spanning mode. According to the invention, the restraint between the steel beam and the concrete bridge deck is released by arranging the non-combined section in the hogging moment area, so that the rigidity of the hogging moment area is reduced, and the stress of the bridge deck in the hogging moment area is improved.
A hogging moment region bridge deck connecting structure of a continuous bridge deck simply supported beam bridge suitable for a steel-concrete composite slab beam comprises a positive bending moment region bridge deck 1, a steel beam 2, a hogging moment region concrete connecting plate 3, a shear connecting piece 4, a non-combined structure 5, a cover beam 6, hogging moment region longitudinal steel bars 7 and positive bending moment region longitudinal steel bars 8.
The hogging moment area concrete connecting plate 3 adopts high-performance concrete, and the anti-cracking performance and the durability of the hogging moment area bridge deck are improved.
The hogging moment area concrete connecting plate 3 is divided into a combined section and a non-combined section, the combined section is connected with the steel beam through a shear connecting piece, and a sealing rubber strip is filled in a gap; and paving waterproof coiled materials such as asphalt felt and the like between the non-combined section and the steel beam for separation and debonding.
The hogging moment area concrete connecting plate 3 is connected with the positive bending moment area bridge deck plate 1 in a cast-in-place mode or a prefabricating mode; when the prefabrication mode is adopted, the non-combined section is a prefabricated plate, and the combined section is a cast-in-place joint.
The bent cap 6 adopts a bright bent cap or a dark bent cap; when the hidden cover beam scheme is adopted, a cushion layer is arranged between the hogging moment area concrete connecting plate 3 and the hidden cover beam.
And the hogging moment area longitudinal steel bar 7 and the positive bending moment area longitudinal steel bar 8 are connected at the joint section of the hogging moment area concrete connecting plate.
A construction method for continuously constructing a bridge deck slab in a hogging moment area of a steel-concrete composite plate girder bridge comprises the following steps:
step 1, pre-burying a shear connector on a steel beam top plate of a positive bending moment area and negative bending moment area combined section, and paving waterproof materials such as asphalt felt on a steel beam top plate of a negative bending moment area non-combined section;
Example 1
With reference to fig. 1, a novel continuous structure of a bridge deck slab in a hogging moment area of a steel-concrete composite plate girder bridge is provided. The bridge deck slab comprises a positive bending moment area bridge deck slab 1, a steel beam 2, a negative bending moment area concrete connecting plate 3, a shear connector 4, a non-combined structure 5, an exposed cover beam 6, a negative bending moment area longitudinal steel bar 7 and a positive bending moment area longitudinal steel bar 8. The bridge deck 1 and the steel beam 2 in the positive bending moment area form a combined structure. The hogging moment area concrete connecting plate 3 strides over two girder steels. The hogging moment area concrete connecting plate 3 is made of high-performance concrete materials. The hogging moment area concrete connecting plate 3 is divided into a combined section and a non-combined section, the combined section is connected with the steel beam through a shear connector, and waterproof materials such as linoleum and the like are laid between the non-combined section and the steel beam for separation, debonding, sealing and waterproofing.
Furthermore, the hogging moment area concrete connecting plate can be constructed in a prefabrication or cast-in-place mode.
Furthermore, the longitudinal steel bars 7 in the hogging moment area need to be configured according to calculation, and the connection of the longitudinal steel bars can adopt the currently common form.
Example 2
With reference to fig. 2, a novel continuous structure of the bridge deck in the hogging moment area of the steel-concrete composite plate girder bridge is provided. The bridge deck slab comprises a positive bending moment area bridge deck slab 1, a steel beam 2, a negative bending moment area concrete connecting plate 3, a shear connector 4, a non-combined structure 5, a hidden cover beam 6, a negative bending moment area longitudinal steel bar 7 and a positive bending moment area longitudinal steel bar 8. The bridge deck 1 and the steel beam 2 in the positive bending moment area form a combined structure. The hogging moment area concrete connecting plate 3 strides over two girder steels. The hogging moment area concrete connecting plate 3 is made of high-performance concrete materials. The hogging moment area concrete connecting plate 3 is divided into a combined section and a non-combined section, the combined section is connected with the steel beam through a shear connector, and waterproof materials such as linoleum and the like are laid between the non-combined section and the steel beam for separation, debonding, sealing and waterproofing.
Further, a cushion layer is arranged between the top of the hidden cover beam 6 and the bottom of the hogging moment area concrete connecting plate 3.
Furthermore, the hogging moment area concrete connecting plate can be constructed in a prefabrication or cast-in-place mode.
Furthermore, the longitudinal steel bars 7 in the hogging moment area need to be configured according to calculation, and the connection of the longitudinal steel bars can adopt the currently common form.
The internal force distribution of the hogging moment area is improved by releasing the partial restraint of the concrete slab and the steel beam in the hogging moment area, and the maximum tensile stress of the concrete slab in the hogging moment area is reduced.
Claims (10)
1. A longitudinal continuous structure of a concrete bridge deck in a bending moment area of a simply supported steel-concrete composite beam is characterized by comprising a positive bending moment area bridge deck (1), a steel beam (2), a negative bending moment area concrete connecting plate (3), a shear connecting piece (4), a non-combined structure (5), a cover beam (6), a negative bending moment area longitudinal reinforcing steel bar (7) and a positive bending moment area longitudinal reinforcing steel bar (8);
hogging moment district concrete connecting plate (3) comprise non-joint section and the joint section that is located non-joint section both sides, hogging moment district concrete connecting plate (3) are striden and are established in the top of two adjacent girder steels (2), and are connected with girder steel (2) at the joint section of both sides, release the restraint between concrete connecting plate (3) and girder steel (2) at non-joint section.
2. The simple steel-concrete composite beam bending moment area concrete bridge deck longitudinal continuous structure as claimed in claim 1, wherein the hogging moment area concrete connecting plate (3) is made of high-performance concrete material.
3. The simple supported steel-concrete composite beam bending moment area concrete bridge deck longitudinal continuous structure according to claim 1, wherein the hogging moment area concrete connecting plate (3) has a length of L1, a non-joint section length of L2 and a joint section length of (L1-L2)/2; the length L2 of the unbonded section is greater than the distance between the two steel beams (2).
4. The simple support steel-concrete composite beam bending moment area concrete bridge deck longitudinal continuous structure as claimed in claim 3, wherein the hogging moment area concrete connecting plates (3) are connected (4) between the connecting sections and the steel beams (2) through shear connectors;
and a non-combined structure (5) is arranged between the non-combined section of the hogging moment area concrete connecting plate (3) and the steel beam (2) for separation and debonding.
5. The simple steel-concrete composite beam bending moment area concrete bridge deck longitudinal continuous structure as claimed in claim 4, wherein the shear connectors (4) are studs or section steel or perforated steel plates.
6. The simple supported steel-concrete composite beam bending moment area concrete bridge deck longitudinal continuous construction according to claim 4, wherein the non-bonding construction (5) is linoleum or other waterproof material.
7. The simple support steel-concrete composite beam bending moment area concrete bridge deck longitudinal continuous structure as claimed in claim 1, wherein a cast-in-place connection mode is adopted between the hogging moment area concrete connecting plate (3) and the positive bending moment area bridge deck (1);
or the hogging moment area concrete connecting plate (3) and the positive bending moment area bridge deck (1) are connected in a prefabricated mode, namely the non-combined section adopts a prefabricated plate, and the combined section adopts a cast-in-place seam.
8. The simple support steel-concrete composite beam bending moment area concrete deck longitudinal continuous structure as claimed in claim 1, wherein the hogging moment area longitudinal reinforcement (7) and the positive bending moment area longitudinal reinforcement (8) are connected at the joint section of the hogging moment area concrete connecting plate (3).
9. The simple support steel-concrete composite beam bending moment area concrete bridge deck longitudinal continuous structure as claimed in claim 1, wherein the capping beam (6) is an exposed capping beam;
or the bent cap beam (6) is a hidden bent cap beam, and a cushion layer is arranged between the hogging moment area concrete connecting plate (3) and the top of the hidden bent cap beam.
10. A method of constructing a continuous structure according to any one of claims 1 to 9, comprising the steps of:
step (1): pre-burying a shear connector (4) on a top plate of the steel beam (2);
step (2): erecting a steel beam (2) to form a simple steel beam structure;
and (3): mounting the positive bending moment area concrete bridge deck (1) to enable the positive bending moment area concrete bridge deck (1) to form a combined structure with the simply supported steel girder structure in the step (2) through a shear connector (4);
and (4): arranging a non-bonding structure (5) at a position corresponding to a non-bonding section of the hogging moment area concrete connecting plate (3) on the top surface of the steel beam (2) of the combined structure for separation and de-bonding; a cushion layer is required to be arranged at the top of the hidden capping beam;
and (5): binding longitudinal steel bars (7) in a hogging moment area and pouring a concrete connecting plate (3) in the hogging moment area in a cast-in-place connection mode; for the prefabricated connection mode, the prefabricated plates of the non-joint section of the hogging moment area are hoisted firstly, and then the wet joints of the joint section are poured.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011291163.1A CN112482221A (en) | 2020-11-18 | 2020-11-18 | Longitudinal continuous structure and construction method of simply supported steel-concrete composite beam hogging moment area bridge deck slab |
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| CN202011291163.1A CN112482221A (en) | 2020-11-18 | 2020-11-18 | Longitudinal continuous structure and construction method of simply supported steel-concrete composite beam hogging moment area bridge deck slab |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113818332A (en) * | 2021-11-08 | 2021-12-21 | 浙江数智交院科技股份有限公司 | Bridge connection system, hogging moment district structure and bridge |
| CN114592440A (en) * | 2022-03-21 | 2022-06-07 | 武汉市规划设计有限公司 | Fabricated steel-concrete composite bridge superstructure and construction process thereof |
| CN114775435A (en) * | 2022-04-29 | 2022-07-22 | 山东大学 | Self-stress bridge continuous construction structure based on simply supported steel beams and construction method thereof |
| CN114808694A (en) * | 2022-06-29 | 2022-07-29 | 湖南省交通规划勘察设计院有限公司 | Combined beam bridge and construction method |
| CN114808691A (en) * | 2022-04-27 | 2022-07-29 | 东南大学 | Directional fiber UHPC bridge deck in hogging moment area of steel-concrete composite beam and preparation and construction method |
| CN115404762A (en) * | 2022-10-10 | 2022-11-29 | 上海市政工程设计研究总院（集团）有限公司 | Pier top longitudinal continuous structure of assembled beam bridge and construction method thereof |
| CN115679839A (en) * | 2022-12-30 | 2023-02-03 | 湖南省交通规划勘察设计院有限公司 | Bridge with continuous simply-supported bridge deck, reinforcement and construction method |
-
2020
- 2020-11-18 CN CN202011291163.1A patent/CN112482221A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113818332A (en) * | 2021-11-08 | 2021-12-21 | 浙江数智交院科技股份有限公司 | Bridge connection system, hogging moment district structure and bridge |
| CN114592440A (en) * | 2022-03-21 | 2022-06-07 | 武汉市规划设计有限公司 | Fabricated steel-concrete composite bridge superstructure and construction process thereof |
| CN114592440B (en) * | 2022-03-21 | 2024-03-19 | 武汉市规划设计有限公司 | Upper structure of assembled steel-concrete combined bridge and construction process thereof |
| CN114808691A (en) * | 2022-04-27 | 2022-07-29 | 东南大学 | Directional fiber UHPC bridge deck in hogging moment area of steel-concrete composite beam and preparation and construction method |
| CN114808691B (en) * | 2022-04-27 | 2024-03-08 | 东南大学 | Directional fiber UHPC bridge deck plate in hogging moment area of steel-concrete composite beam and preparation and construction method |
| CN114775435A (en) * | 2022-04-29 | 2022-07-22 | 山东大学 | Self-stress bridge continuous construction structure based on simply supported steel beams and construction method thereof |
| CN114775435B (en) * | 2022-04-29 | 2024-02-23 | 山东大学 | Self-stress bridge continuous structure based on simply supported steel beam and construction method thereof |
| CN114808694A (en) * | 2022-06-29 | 2022-07-29 | 湖南省交通规划勘察设计院有限公司 | Combined beam bridge and construction method |
| CN115404762A (en) * | 2022-10-10 | 2022-11-29 | 上海市政工程设计研究总院（集团）有限公司 | Pier top longitudinal continuous structure of assembled beam bridge and construction method thereof |
| CN115679839A (en) * | 2022-12-30 | 2023-02-03 | 湖南省交通规划勘察设计院有限公司 | Bridge with continuous simply-supported bridge deck, reinforcement and construction method |
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