CN113026524A - Novel horizontal longitudinal connecting system for three-split steel box girder - Google Patents
Novel horizontal longitudinal connecting system for three-split steel box girder Download PDFInfo
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- CN113026524A CN113026524A CN202110370459.0A CN202110370459A CN113026524A CN 113026524 A CN113026524 A CN 113026524A CN 202110370459 A CN202110370459 A CN 202110370459A CN 113026524 A CN113026524 A CN 113026524A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 177
- 239000010959 steel Substances 0.000 title claims abstract description 177
- 230000003014 reinforcing effect Effects 0.000 claims description 8
- 239000007787 solid Substances 0.000 claims description 5
- 238000005452 bending Methods 0.000 claims 2
- 238000010276 construction Methods 0.000 abstract description 19
- 230000005540 biological transmission Effects 0.000 abstract description 8
- 238000005192 partition Methods 0.000 description 13
- 238000003466 welding Methods 0.000 description 7
- 238000009826 distribution Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000005549 size reduction Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
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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
- E01D2/00—Bridges characterised by the cross-section of their bearing spanning structure
- E01D2/04—Bridges characterised by the cross-section of their bearing spanning structure of the box-girder type
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/20—Concrete, stone or stone-like material
- E01D2101/24—Concrete
- E01D2101/26—Concrete reinforced
- E01D2101/268—Composite concrete-metal
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/30—Metal
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a novel horizontal longitudinal connecting system for a three-split steel box girder, which comprises a middle steel box girder and side steel box girders arranged on two sides of the middle steel box girder, wherein the middle steel box girder and the side steel box girders are connected into a whole through a horizontal longitudinal connecting system component, the horizontal longitudinal connecting system component is continuously bent, and a bent part of the horizontal longitudinal connecting system component is fixed with the middle steel box girder/the side steel box girders. The novel three-split type steel box girder horizontal and longitudinal connecting system structure can obviously improve the transmission efficiency of longitudinal horizontal force, reduce the size of the horizontal and longitudinal connecting system, improve the construction difficulty and precision of a pushing construction method and a cantilever assembling construction method, contribute to reducing the vortex vibration influence of the three-split type steel box girder at low wind speed, improve the overlooking aesthetic feeling of the structure and increase the horizontal and horizontal rigidity of the structure. The invention has the advantages of reasonable structure, novel concept, good comprehensive economy, strong practicability and wider application prospect.
Description
Technical Field
The invention belongs to the technical field of steel box girder structures, and particularly relates to a novel horizontal longitudinal connecting system for a three-split type steel box girder.
Background
The split type steel box girder is another important bridge section innovation after a closed box girder, is generally called as a second-generation steel box girder, and aims to improve aerodynamic performance and flutter performance.
When the three-split type steel box girder is applied to a cable-stayed bridge, longitudinal horizontal force (mainly cable-stayed cable force) between the steel box girders needs to be transmitted through a horizontal longitudinal connecting system, so that the uniform distribution of the cable force of the three-split type box girder is ensured. The traditional I-shaped horizontal longitudinal connecting system transmits longitudinal horizontal force between steel box girders through shear deformation of the horizontal longitudinal connecting system, the transmission efficiency is low, and the horizontal longitudinal connecting system is required to be made into a large-size box-shaped section so as to have enough longitudinal shear rigidity.
Disclosure of Invention
The invention is provided for solving the problems in the prior art, and aims to provide a novel horizontal longitudinal connecting system for a three-split steel box girder.
The technical scheme of the invention is as follows: the utility model provides a novel horizontal longitudinal connection system is used to components of a three-part type steel box girder, includes middle steel box girder and arranges the side steel box girder of its both sides in respectively, middle steel box girder is connected as a whole through horizontal longitudinal connection system subassembly with the side steel box girder, horizontal longitudinal connection system subassembly is the form of buckling in succession, and horizontal longitudinal connection system subassembly's kink is fixed with middle steel box girder/side steel box girder.
Furthermore, the horizontal longitudinal connecting system component consists of a plurality of connecting units arranged between the middle steel box girder and the side steel box girder.
Furthermore, the connecting unit comprises two rear connecting sections which are inclined to the middle steel box girder and the side steel box girders.
Furthermore, the connecting unit comprises a rear connecting section which is inclined to both the middle steel box girder and the side steel box girder, and the connecting unit further comprises a rear connecting section which is vertical to both the middle steel box girder and the side steel box girder.
Furthermore, middle steel box girder joint connection is reserved at the outer wall of each of two sides of the middle steel box girder, side steel box girder joint connection is reserved at the side wall of the side steel box girder, and a rear connecting section is arranged between the middle steel box girder joint connection and the side steel box girder joint connection.
Furthermore, the middle steel box girder and the side steel box girder are provided with clapboards for reinforcing the middle steel box girder and the side steel box girder.
Further, the partition is one of a truss partition or a solid web partition.
Furthermore, the rear connecting section is also provided with a longitudinal stiffening rib for longitudinally reinforcing the rear connecting section.
Furthermore, the middle steel box girder and the side steel box girder are one of pure steel box girders and steel-concrete combined box girders.
The novel three-split type steel box girder horizontal and longitudinal connecting system structure can obviously improve the transmission efficiency of longitudinal horizontal force, reduce the size of the horizontal and longitudinal connecting system, improve the construction difficulty and precision of a pushing construction method and a cantilever assembling construction method, contribute to reducing the vortex vibration influence of the three-split type steel box girder at low wind speed, improve the overlooking aesthetic feeling of the structure and increase the horizontal and horizontal rigidity of the structure. The invention has the advantages of reasonable structure, novel concept, good comprehensive economy, strong practicability and wider application prospect.
Drawings
FIG. 1 is a schematic view of a break-away surface of the present invention;
FIG. 2 is a schematic diagram of one form of construction of the present invention;
FIG. 3 is a schematic structural view of yet another embodiment of the present invention;
FIG. 4 is a fixed schematic view of the present invention;
FIG. 5 is a further fixed schematic view of the present invention;
wherein:
1 middle steel box girder 2 side steel box girder
3 horizontal longitudinal connecting system component 4 truss type partition plate
5 solid web type partition 6 longitudinal stiffening rib
3-1 middle steel box girder connecting joint 3-2 side steel box girder connecting joint
3-3 rear connecting segment
7-1 bolted component 7-2 weld spot.
Detailed Description
The present invention is described in detail below with reference to the accompanying drawings and examples:
as shown in fig. 1-5, a novel horizontal longitudinal connection system for a three-split steel box girder comprises a middle steel box girder 1 and side steel box girders 2 respectively arranged at two sides of the middle steel box girder, wherein the middle steel box girder 1 and the side steel box girders 2 are connected into a whole through a horizontal longitudinal connection system component 3, the horizontal longitudinal connection system component 3 is continuously bent, and a bent part of the horizontal longitudinal connection system component 3 is fixed with the middle steel box girder 1/the side steel box girders 2.
The horizontal longitudinal connecting system component 3 is composed of a plurality of connecting units arranged between the middle steel box girder 1 and the side steel box girder 2.
The connecting unit comprises a rear connecting section 3-3 which is inclined to the middle steel box girder 1 and the side steel box girder 2, and the connecting unit also comprises a rear connecting section 3-3 which is vertical to the middle steel box girder 1 and the side steel box girder 2. As shown in fig. 2.
Middle steel box girder connecting joints 3-1 are reserved on the outer walls of the two sides of the middle steel box girder 1, side steel box girder connecting joints 3-2 are reserved on the side walls of the side steel box girders 2, and rear connecting sections 3-3 are arranged between the middle steel box girder connecting joints 3-1 and the side steel box girder connecting joints 3-2.
And the middle steel box girder 1 and the side steel box girder 2 are internally provided with a clapboard for reinforcing the middle steel box girder and the side steel box girder.
The partition is one of a truss type partition 4 or a solid web type partition 5.
And the rear connecting section 3-3 is also provided with a longitudinal stiffening rib 6 for longitudinally reinforcing the rear connecting section.
The middle steel box girder 1 and the side steel box girder 2 are one of pure steel box girders and steel-concrete combined box girders.
Preferably, the rear connecting section 3-3 of the horizontal longitudinal connecting system component 3 can be selected from an I-shaped section and a box-shaped section according to the stress form.
The horizontal longitudinal connecting system component 3 corresponds to the position of the partition boards in the middle steel box girder 1 and the side steel box girder 2, so that the reinforcement of the connecting sections is realized.
The rear connecting section 3-3 can be connected and fixed by a bolt assembly 7-1.
When the pushing construction method is adopted to construct the cable-stayed bridge in the embodiment
After the sections are pushed through the main tower, hoisting the rear connecting section 3-3 to the joint positions of the middle steel box girder connecting joint 3-1 and the side steel box girder connecting joint 3-2, and bolting the web plate and the wing plate of the rear connecting section 3-3 and the joint sections into a whole through the splice plates.
In the present embodiment, the cable-stayed bridge is constructed by adopting the cantilever assembling method
According to construction requirements, before or after the middle steel box girder 1 and the side steel box girders 2 in the three-split type steel box girders are hoisted in place, the web plates and the wing plates of the rear connecting sections 3-3 are bolted and connected with the joint sections into a whole through splicing plates.
Preferably, the bolt assembly 7-1 adopts a high-strength friction M30 bolt to strengthen the structural integrity.
Preferably, the connecting transition part of the flange plate and the steel box girder of the middle steel box girder connecting joint 3-1 and the side steel box girder connecting joint 3-2 adopts a chamfer with the radius not less than 3 m.
When the pushing method is adopted for construction, the structural sizes of the middle steel box girder connecting joint 3-1 and the side steel box girder connecting joint 3-2 can be reasonably optimized according to the size of the tower column.
After construction is completed, the transmission efficiency of longitudinal and horizontal component forces of the cable force of the sections is simulated through finite element software, and the cable force acts on the steel box girders at two sides, so that the following results are obtained.
In the structure of the connecting unit with an inclined rear connecting section 3-3 and a vertical rear connecting section 3-3 in the embodiment, the cable force distribution ratio of the middle steel box girder 1 is 22.3%, and the cable force distribution ratio of the side steel box girder 2 is 77.7%.
The cable force of the middle steel box girder 1 and the cable force of the side steel box girder 2 of the traditional connecting system with the same I-shaped section are respectively 0.3% and 99.7%.
The longitudinal horizontal force distribution effect of this embodiment is far beyond that of the conventional connection system.
Yet another embodiment
The utility model provides a novel horizontal longitudinal connection system is used to components of a three-part type steel box girder, includes middle steel box girder 1 and arranges the side steel box girder 2 of its both sides in respectively, middle steel box girder 1 is connected as a whole through horizontal longitudinal connection system subassembly 3 with side steel box girder 2, horizontal longitudinal connection system subassembly 3 is the form of buckling in succession, and horizontal longitudinal connection system subassembly 3's kink is fixed with middle steel box girder 1/side steel box girder 2.
The horizontal longitudinal connecting system component 3 is composed of a plurality of connecting units arranged between the middle steel box girder 1 and the side steel box girder 2. As shown in fig. 3.
The connecting unit comprises two rear connecting sections 3-3 which are inclined with the middle steel box girder 1 and the side steel box girders 2.
Middle steel box girder connecting joints 3-1 are reserved on the outer walls of the two sides of the middle steel box girder 1, side steel box girder connecting joints 3-2 are reserved on the side walls of the side steel box girders 2, and rear connecting sections 3-3 are arranged between the middle steel box girder connecting joints 3-1 and the side steel box girder connecting joints 3-2.
And the middle steel box girder 1 and the side steel box girder 2 are internally provided with a clapboard for reinforcing the middle steel box girder and the side steel box girder.
The partition is one of a truss type partition 4 or a solid web type partition 5.
And the rear connecting section 3-3 is also provided with a longitudinal stiffening rib 6 for longitudinally reinforcing the rear connecting section.
The middle steel box girder 1 and the side steel box girder 2 are one of pure steel box girders and steel-concrete combined box girders.
Preferably, the rear connecting section 3-3 of the horizontal longitudinal connecting system component 3 can be selected from an I-shaped section and a box-shaped section according to the stress form.
The horizontal longitudinal connecting system component 3 corresponds to the position of the partition boards in the middle steel box girder 1 and the side steel box girder 2, so that the reinforcement of the connecting sections is realized.
The connection mode of the rear connecting section 3-3 can adopt a welding spot 7-2 for connection and fixation.
In the present embodiment, the cable-stayed bridge is constructed by adopting the cantilever assembling method
After the segments are pushed through the main tower, the rear connecting segments 3-3 are hoisted to joints, and the webs and wing plates of the rear connecting segments 3-3 are connected with the joint segments into a whole through welding spots 7-2.
In the present embodiment, the cable-stayed bridge is constructed by adopting the cantilever assembling method
According to construction requirements, before or after the middle steel box girder 1 and the side steel box girder 2 in the three-split type steel box girder are hoisted in place, webs and wing plates of the rear connecting sections 3-3 and the joint sections are connected into a whole through welding spots 7-2 of tailor welding.
And when the rear connecting section 3-3 is fixed in a welding mode, the welding part adopts penetration welding.
After construction is completed, the transmission efficiency of longitudinal and horizontal component forces of the cable force of the sections is simulated through finite element software, and the cable force acts on the steel box girders at two sides, so that the following results are obtained.
In the embodiment, the connecting unit has a structure of two inclined rear connecting sections 3-3, the cable force distributed by the middle steel box girder 1 accounts for 30.8%, and the cable force distributed by the side steel box girder 2 accounts for 69.2%.
The cable force of the middle steel box girder 1 and the cable force of the side steel box girder 2 of the traditional connecting system with the same I-shaped section are respectively 0.3% and 99.7%.
The longitudinal horizontal force distribution effect of this embodiment is far beyond that of the conventional connection system.
The invention changes the traditional shearing force transmission mode, and adopts the longitudinal connecting system with a specific structure and the rod axial tension and compression mode to transmit the longitudinal horizontal force between the box girders, thereby obviously improving the transmission efficiency of the longitudinal horizontal force and reducing the size of the longitudinal horizontal connecting system.
Furthermore, for the three-split type steel box girder constructed by the pushing construction method and the cantilever splicing construction method, the construction difficulty and precision are obviously improved due to the reduction of the integrity of the sections and the structural weight.
Although the traditional three-split steel box girder can effectively improve the structure flutter performance, the gaps among the box girders are easy to generate regular vortex shedding, and vortex oscillation is easy to occur at low wind speed.
By adopting the novel plane longitudinal connecting system for the three-split type steel box girder, gaps among the three-split type steel box girders are divided by the horizontal longitudinal connecting system, and the influence of vortex vibration of the three-split type steel box girder at low wind speed is favorably reduced.
The novel three-split type steel box girder horizontal and longitudinal connecting system increases the horizontal rigidity of the structure, and the size reduction of the novel three-split type steel box girder increases the overlooking aesthetic feeling of the structure.
The novel three-split type steel box girder horizontal and longitudinal connecting system structure can obviously improve the transmission efficiency of longitudinal horizontal force, reduce the size of the horizontal and longitudinal connecting system, improve the construction difficulty and precision of a pushing construction method and a cantilever assembling construction method, contribute to reducing the vortex vibration influence of the three-split type steel box girder at low wind speed, improve the overlooking aesthetic feeling of the structure and increase the horizontal and horizontal rigidity of the structure. The invention has the advantages of reasonable structure, novel concept, good comprehensive economy, strong practicability and wider application prospect.
Claims (9)
1. The utility model provides a three components of a whole that can function independently formula steel box girder is with novel horizontal longitudinal connection system, includes middle steel box girder (1) and arranges side steel box girder (2) of its both sides in respectively, its characterized in that: the middle steel box girder (1) and the side steel box girder (2) are connected into a whole through a horizontal longitudinal connection system component (3), the horizontal longitudinal connection system component (3) is in a continuous bending shape, and a bending part of the horizontal longitudinal connection system component (3) is fixed with the middle steel box girder (1)/the side steel box girder (2).
2. The novel horizontal longitudinal connecting system for the three-split steel box girder according to claim 1, is characterized in that: the horizontal longitudinal connecting system component (3) is composed of a plurality of connecting units arranged between the middle steel box girder (1) and the side steel box girder (2).
3. The novel horizontal longitudinal connecting system for the three-split steel box girder according to claim 2, is characterized in that: the connecting unit comprises two rear connecting sections (3-3) which are inclined with the middle steel box girder (1) and the side steel box girder (2).
4. The novel horizontal longitudinal connecting system for the three-split steel box girder according to claim 2, is characterized in that: the connecting unit comprises a rear connecting section (3-3) which is inclined with the middle steel box girder (1) and the side steel box girder (2), and the connecting unit also comprises a rear connecting section (3-3) which is vertical with the middle steel box girder (1) and the side steel box girder (2).
5. The novel horizontal longitudinal connecting system for the three-split steel box girder according to claim 2, is characterized in that: middle steel box roof beam attach fitting (3-1) is reserved all to middle steel box roof beam (1) both sides outer wall department, side steel box roof beam (2) lateral wall department is reserved and is provided with side steel box roof beam attach fitting (3-2), be provided with back linkage segment (3-3) between middle steel box roof beam attach fitting (3-1), the side steel box roof beam attach fitting (3-2).
6. The novel horizontal longitudinal connecting system for the three-split steel box girder according to claim 5, is characterized in that: and the middle steel box girder (1) and the side steel box girder (2) are internally provided with a clapboard for reinforcing the middle steel box girder and the side steel box girder.
7. The novel horizontal longitudinal connecting system for the three-split steel box girder of claim 6, is characterized in that: the clapboard is one of a truss type clapboard (4) or a solid web type clapboard (5).
8. The novel horizontal longitudinal connecting system for the three-split steel box girder according to claim 7, is characterized in that: and the rear connecting section (3-3) is also provided with a longitudinal stiffening rib (6) for longitudinally reinforcing the rear connecting section.
9. The novel horizontal longitudinal connecting system for the three-split steel box girder according to claim 1, is characterized in that: the middle steel box girder (1) and the side steel box girder (2) are one of pure steel box girders and steel-concrete combined box girders.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110370459.0A CN113026524A (en) | 2021-04-07 | 2021-04-07 | Novel horizontal longitudinal connecting system for three-split steel box girder |
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| CN202110370459.0A CN113026524A (en) | 2021-04-07 | 2021-04-07 | Novel horizontal longitudinal connecting system for three-split steel box girder |
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| KR101869458B1 (en) * | 2017-07-27 | 2018-06-20 | 김태균 | Composite box girder using steel beam and construction method therefor |
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| CN108677678A (en) * | 2018-06-21 | 2018-10-19 | 浙江科欣工程设计咨询有限公司 | A kind of space structure mixing beam bridge of list case concrete-more casees steel |
| KR20200008726A (en) * | 2018-07-17 | 2020-01-29 | 박정자 | Steel-concrete hybrid box-type girders with incrementally-cast bottom concrete flange and its constructional method |
| CN111636287A (en) * | 2020-05-09 | 2020-09-08 | 中铁大桥勘测设计院集团有限公司 | Split type circular-arc-bottom steel box girder |
| CN214783198U (en) * | 2021-04-07 | 2021-11-19 | 中国铁路设计集团有限公司 | Novel horizontal longitudinal connecting system for three-split steel box girder |
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2021
- 2021-04-07 CN CN202110370459.0A patent/CN113026524A/en active Pending
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| CN102031749A (en) * | 2009-09-28 | 2011-04-27 | 中交公路规划设计院有限公司 | Grid structure for controlling girder induced vibration of split steel box girder bridge |
| KR101066838B1 (en) * | 2011-04-11 | 2011-09-26 | 고문혜 | Double composite box girder and construction method using the same |
| KR101634313B1 (en) * | 2015-04-14 | 2016-06-30 | 승화프랜트산업 (주) | Steel box girder with reinforced rigidity and resisting power of moment, and method for constructing bridge thereof |
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