CN203729192U - Combined box girder with pulling-resistant lower flange steel webs - Google Patents
Combined box girder with pulling-resistant lower flange steel webs Download PDFInfo
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- CN203729192U CN203729192U CN201320888750.8U CN201320888750U CN203729192U CN 203729192 U CN203729192 U CN 203729192U CN 201320888750 U CN201320888750 U CN 201320888750U CN 203729192 U CN203729192 U CN 203729192U
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Abstract
The utility model relates to a combined box girder with pulling-resistant lower flange steel webs and belongs to the technical field of bridge structures. The combined box girder comprises an upper flange concrete plate, a lower flange concrete plate, corrugated steel webs, upper flange steel plates, lower flange steel plates and connectors. The corrugated steel webs are connected to the upper flange steel plates and the lower flange steel plates by welding. The lower flange concrete plate and the lower flange steel plates are integrated through the connectors welded below the lower flange steel plates. The upper flange concrete plate and the upper flange steel plates are integrated through stud connectors welded above the upper flange steel plates. The combined box girder is characterized in that the connectors below the lower flange steel plates are T-shaped connectors; each T-shaped connector comprises a T-shaped connector web and a T-shaped connector top plate. By the use of the combined box girder, the problems that the reinforcement mesh in the corrugated steel webs and lower flange concrete plates employing PBL connectors traditionally, especially transverse reinforcement, is difficult to construct and construction quality is difficult to guarantee are solved without increasing usage of steel.
Description
Technical field
The utility model relates to a kind of bottom flange resistance to plucking corrugated steel web plate composite box girder that is applied to bridge construction, belongs to bridge construction technical field.
Background technology
Be illustrated in figure 1 the corrugated steel web plate composite box girder that traditional bottom flange adopts PBL connector 10, the Main Function of the PBL connector 10 in bottom flange concrete slab 2 comprises: 1. Transfer of Shear: bear the interface longitudinal shear between bottom flange steel plate 6 and bottom flange concrete slab 2, restriction interface between the two is longitudinally free to slide, thereby ensure that girder steel and concrete slab distortion are collaborative, co-operation, performance compound action, improves rigidity of section and supporting capacity; 2. resistance to plucking: bottom flange concrete slab 2 hangs on bottom flange steel plate 6 belows, under positive bending moment effect and Gravitative Loads, bottom flange steel plate 6 has the trend pulling up, bottom flange concrete slab 2 has the trend of whereabouts, connector can be resisted the trend that both are separated from each other, particularly cause separation and the whereabouts after concrete cracking by long term or ultimate load, improve combined box beam safety, durability.
PBL connector 10 is used widely in existing this type of engineering, but, 2 deficiencies below this connector exists in the time being applied to corrugated steel web plate composite box girder bottom flange: 1, PBL connector 10 is longitudinally divided into three by the complete bottom flange concrete slab 2 one of script, destroy the globality of bottom flange concrete slab 2, collaborative work and the aforementioned resistance to plucking ability of mentioning for combined box beam total cross-section have a negative impact, and have reduced structural performance, safety and the durability of combined box beam; 2, adopt after PBL connector 10, reinforced mesh 11 difficult arrangement, the difficulty of construction of bottom flange concrete slab 2 is large, and construction quality is difficult to ensure.Therefore corrugated steel web plate composite box girder lacks a kind of form of taking into account bottom flange stress performance and difficulty of construction, thereby has restricted the further promotion and application of corrugated steel web plate composite box.
Utility model content
The purpose of this utility model is to provide a kind of bottom flange resistance to plucking corrugated steel web plate composite box girder, solves problems of the prior art.Less with respect to existing corrugated steel web plate composite box girder difficulty of construction, construction quality more easily ensures, keeps the effect of Transfer of Shear and resistance to plucking between bottom flange concrete slab 2 and bottom flange steel plate 6 simultaneously, and safety, durability are more excellent.Simple structure, easy construction, economic performance is more excellent.
The technical solution of the utility model is as follows:
A kind of bottom flange of the present utility model resistance to plucking corrugated steel web plate composite box girder, this combined box beam comprises top flange concrete slab 1, bottom flange concrete slab 2, Wavelike steel webplate 3, top flange steel plate 4, bottom flange steel plate 6 and connector 7, Wavelike steel webplate 3 is welded to connect with top flange steel plate 4, bottom flange steel plate 6, and bottom flange concrete slab 2 forms entirety by the connector and the bottom flange steel plate 6 that are welded in bottom flange steel plate 6 belows; Top flange concrete slab 1 forms entirety by the peg connector 5 that is welded in top flange steel plate 4 tops with top flange steel plate 4; It is characterized in that, the connector of described bottom flange steel plate 6 belows is T-shaped connector 7, and this T-shaped connector comprises T-shaped connector web 8 and T-shaped connector top board 9.
The utility model has following beneficial effect with respect to prior art:
(1) because bottom flange adopts T-shaped connector 7, distribute along case beam longitudinal separation, therefore be the reinforced mesh 11 in bottom flange concrete slab 2, particularly the layout of transverse reinforcement provides sufficient space, be convenient to the construction of bottom flange concrete slab 2, reduce difficulty of construction, improve construction quality and ensure.(2) because T-shaped connector 7 distributes along case beam longitudinal separation, bottom flange concrete slab 2 has kept good globality, has improved its structural performance and long-term behaviour, has improved overall security and the durability of combined box beam.(3) T-shaped connector 7 has preferably extraction-resistant behavior, and T-shaped connector top board 9 can provide larger uplift resistance, the separation trend of opposing bottom flange steel plate 6 and bottom flange concrete slab 2, safety and the service behaviour of guarantee combined box beam.(4) T-shaped connector 7 can, in steel work processing factory by hot rolled H-shaped 15 fly-cuttings, batch production, reduce the during welding for steel structure work of connector part, guarantees that bottom flange adopts the structural performance of the combined box beam after T-shaped connector 7.
Brief description of the drawings
Fig. 1 is the corrugated steel web plate composite box girder cut-away view that prior art bottom flange adopts PBL connector.
Fig. 2 is cut-away view of the present utility model.
Fig. 3 is the schematic diagram of the utility model steel work processing part.
Fig. 4 is the schematic diagram of the upper and lower edge of a wing of the utility model concrete slab internal placement.
Fig. 5 is the utility model reinforced mesh schematic diagram.
Fig. 6 is the schematic diagram that the utility model has been constructed.
Fig. 7 is the process schematic diagram that the utility model is manufactured T-shaped connector.
In figure: the concrete slab of 1-top flange; 2-bottom flange concrete slab; 3-Wavelike steel webplate; 4-top flange steel plate; 5-peg connector; 6-bottom flange steel plate; 7-T-shaped connector; 8-T-shaped connector web; 9-T-shaped connector top board; 10-PBL connector; 11-reinforced mesh; 12-presstressed reinforcing steel bellows; 13-presstressed reinforcing steel; 14-presstressed reinforcing steel ground tackle; 15-H shaped steel; 16-T-steel.
Detailed description of the invention
Below in conjunction with accompanying drawing, be further described as follows to structure of the present utility model, work progress.
As shown in Figure 2, a kind of bottom flange of the present utility model resistance to plucking corrugated steel web plate composite box girder, this combined box beam comprises top flange concrete slab 1, bottom flange concrete slab 2, Wavelike steel webplate 3, top flange steel plate 4, bottom flange steel plate 6 and connector, Wavelike steel webplate 3 is welded to connect with top flange steel plate 4, bottom flange steel plate 6 respectively, and bottom flange concrete slab 2 forms entirety by the connector and the bottom flange steel plate 6 that are welded in bottom flange steel plate 6 belows; Top flange concrete slab 1 forms entirety by the peg connector 5 that is welded in top flange steel plate 4 tops with top flange steel plate 4; The connector of above-mentioned bottom flange steel plate 6 belows is T-shaped connector 7, and this T-shaped connector comprises T-shaped connector web 8 and T-shaped connector top board 9.
As shown in Fig. 3 to 6, in bottom flange concrete slab 2, be provided with reinforced mesh 11 and presstressed reinforcing steel bellows 12.Bottom flange concrete slab 2 forms entirety by the T-shaped connector 7 that is welded in bottom flange steel plate 6 belows with bottom flange steel plate 6; Top flange concrete slab 1 forms entirety by the peg connector 5 that is welded in top flange steel plate 4 tops with top flange steel plate 4.As shown in Figure 7, T-shaped connector 7 can be made up fast of H shaped steel 15, first H shaped steel 15 is cut into T-shaped just 16 along web middle section symmetry, and then cutting T-steel 16 be several sections, the T-shaped connector 7 described in can obtaining.Can be according to bottom flange steel-concrete interface shearing and the required T-shaped connector 7 of bottom flange concrete slab 2 Thickness Design, then via selecting suitable hot rolled H-shaped 15 cuttings to obtain.
A kind of bottom flange of the present utility model resistance to plucking corrugated steel web plate composite box girder construction method comprises the following steps:
Make T-shaped connector 7 in factory's fly-cutting; In factory, Wavelike steel webplate 3 and top flange steel plate 4, bottom flange steel plate 6 are welded to connect, melting welding peg 5 above top flange steel plate 4 welds T-shaped connector 7 below bottom flange steel plate 6; Transport steel member, to construction site, is made bottom flange concrete slab 2: sets up temporary supporting and sets up template, arrange reinforced mesh 11, and pre-buried presstressed reinforcing steel bellows 12, concreting, forms bottom flange concrete slab 2; Make top flange concrete slab 1: set up temporary supporting and set up template, temporary supporting can be set up by the bottom flange concrete slab 2 based on reaching some strength, arrange reinforced mesh 11, pre-buried presstressed reinforcing steel bellows 12, concreting, forms top flange concrete slab 1; Penetrate and tensioned prestressing bar 13.Thereby form the bottom flange resistance to plucking corrugated steel web plate composite box girder as shown in Fig. 4 to 6 and Fig. 7.
The utility model provides a kind of bottom flange resistance to plucking corrugated steel web plate composite box girder, can be used for bridge construction.This combined box beam is on the basis of basic structure performance that keeps traditional corrugated steel web plate composite box girder, reduce difficulty of construction, improving construction quality ensures, strengthen the concrete integrality in bottom flange, improve long-term behaviour and the durability of concrete slab, and can resist preferably the separation trend of bottom flange steel plate and bottom flange concrete slab, the connector simultaneously relating to can be by hot-rolled steel section in factory's fly-cutting, batch production, structure letter is answered, easy construction, and economic performance is more excellent.
Claims (1)
1. a bottom flange resistance to plucking corrugated steel web plate composite box girder, this combined box beam comprises top flange concrete slab (1), bottom flange concrete slab (2), Wavelike steel webplate (3), top flange steel plate (4), bottom flange steel plate (6) and connector (7), Wavelike steel webplate (3) is welded to connect with top flange steel plate (4), bottom flange steel plate (6), and bottom flange concrete slab (2) forms entirety by the connector and the bottom flange steel plate (6) that are welded in bottom flange steel plate (6) below; Top flange concrete slab (1) forms entirety by the peg connector (5) that is welded in top flange steel plate (4) top with top flange steel plate (4); It is characterized in that, the connector of described bottom flange steel plate (6) below is T-shaped connector (7), and this T-shaped connector comprises T-shaped connector web (8) and T-shaped connector top board (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320888750.8U CN203729192U (en) | 2013-12-31 | 2013-12-31 | Combined box girder with pulling-resistant lower flange steel webs |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320888750.8U CN203729192U (en) | 2013-12-31 | 2013-12-31 | Combined box girder with pulling-resistant lower flange steel webs |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203729192U true CN203729192U (en) | 2014-07-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201320888750.8U Active CN203729192U (en) | 2013-12-31 | 2013-12-31 | Combined box girder with pulling-resistant lower flange steel webs |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103741584A (en) * | 2013-12-31 | 2014-04-23 | 清华大学 | Lower flange anti-pulling composite box girder with corrugated steel webs and construction method |
| CN104195959A (en) * | 2014-09-26 | 2014-12-10 | 中铁二十局集团第五工程有限公司 | Construction technology for prefabricating a corrugated steel web PC I beam into combined box girder bridge |
| CN104343203A (en) * | 2014-11-04 | 2015-02-11 | 福州大学 | Novel combined beam structure based on steel-ultra-high property concrete |
| CN105937204A (en) * | 2016-05-24 | 2016-09-14 | 安徽省交通建设有限责任公司 | Large-span steel box girder rigidity coordination type composite bridge deck pavement layer structure and construction method thereof |
-
2013
- 2013-12-31 CN CN201320888750.8U patent/CN203729192U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103741584A (en) * | 2013-12-31 | 2014-04-23 | 清华大学 | Lower flange anti-pulling composite box girder with corrugated steel webs and construction method |
| CN104195959A (en) * | 2014-09-26 | 2014-12-10 | 中铁二十局集团第五工程有限公司 | Construction technology for prefabricating a corrugated steel web PC I beam into combined box girder bridge |
| CN104195959B (en) * | 2014-09-26 | 2016-03-23 | 中铁二十局集团第五工程有限公司 | A kind of prefabricated Wavelike steel webplate PC i beam turns combination box bridge construction technique |
| CN104343203A (en) * | 2014-11-04 | 2015-02-11 | 福州大学 | Novel combined beam structure based on steel-ultra-high property concrete |
| CN105937204A (en) * | 2016-05-24 | 2016-09-14 | 安徽省交通建设有限责任公司 | Large-span steel box girder rigidity coordination type composite bridge deck pavement layer structure and construction method thereof |
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