CN206289536U - A kind of concrete box girder direction across bridge prestressed structure - Google Patents
A kind of concrete box girder direction across bridge prestressed structure Download PDFInfo
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- CN206289536U CN206289536U CN201621419852.5U CN201621419852U CN206289536U CN 206289536 U CN206289536 U CN 206289536U CN 201621419852 U CN201621419852 U CN 201621419852U CN 206289536 U CN206289536 U CN 206289536U
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- bridge
- box girder
- prestressed
- steel cable
- concrete box
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Abstract
The utility model provides a kind of concrete box girder direction across bridge prestressed structure, belongs to bridge structure design technical field.The concrete box girder direction across bridge prestressed structure includes that non-bending steel cable prestressed strand, C-shaped corner steel, U-shaped are anti-and collapses reinforcing bar, anchorage and anchor plate.Support of the prestressed strand by being arranged on the C-shaped corner steel of box girder web and base plate junction realizes that wide-angle is curved, an arrangement shape for approximate U shape is transversely formed in box beam, so as to reach web and base plate while the effect of transverse prestress can be applied with, the holistic resistant behavior and cracking resistance of concrete box girder are improve.Concrete box girder direction across bridge prestressed structure of the present utility model can be widely applied to engineering design field, this direction across bridge prestressed constructions mode can be used in large-span concrete box girder bridge and concrete flexural beam bridge, the stress performance and cracking resistance of box beam can be greatly improved.
Description
Technical field
The utility model belongs to bridge structure design technical field, is related to a kind of prestressed constructions of concrete box-beam bridge
The design of mode, is related specifically to the direction across bridge prestressed structure in a kind of concrete box girder.
Background technology
At present, large span prestressed concrete box girder bridge is the principal tensile stress for reducing box beam in design, and is reached simultaneously
The effect of box beam entirety cracking resistance is improved, the method for generally using is configuration direction across bridge prestressed strand, and traditional box beam is horizontal
Bridge is mainly that to use fining twisted steel or steel strand wires be prestressed material to prestressing force arrangement form, in the web of concrete box girder
Straight-line prestressed steel beam is arranged with top board.This traditional direction across bridge prestressing force arrangement be present, first web
The vertical prestressing steel Shu Changdu of middle arrangement is limited by deck-molding, and when box beam height is smaller, anchorage retraction can cause the pre- of steel beam
Stress loss is relatively large, and effective prestress reduction is more, so as to cause prestressing force effect to improve not the cracking resistance of web
Greatly；Secondly because vertical prestressing upper end is stretching end in web, lower end is anchored end, between the anchored end of lower end and beam bottom
Less, anchored end lower concrete occurs that local tension is excessive to concrete thickness after prestressing force carries out one-end tension, makes
There is tear risk in the concrete for obtaining web lower edge；Also in curved beam bridges, cut because the effect of moment of torsion can there is also base plate
Stress, and this kind of transverse prestress arrangement cannot be due to the limitation for being difficult to be opened on web on the construction such as stretching notch
Transverse prestress is arranged in base plate, the box beam base plate without transverse prestress effect is compared to the top for being applied with transverse prestress effect
Plate and web, the risk of its concrete cracking are dramatically increased.
Utility model content
The utility model provides a kind of direction across bridge prestressed structure of concrete box girder, and this kind of prestressed constructions mode is used
Non-bending steel cable is prestressed material, the support of the C-shaped corner steel by being arranged on box girder web and base plate junction so that
Whole beam prestress wire carries out wide-angle and curves in web and base plate junction, forms a direction across bridge for approximate U shape and in advance should
Power arranges shape, it is achieved thereby that by the prestressed strand of whole beam in box girder web and base plate.This kind of direction across bridge prestressing force
Structure can make web and the base plate can be applied with transverse prestress effect, it is ensured that the overall cracking resistance of box beam, simultaneously because
Prestressing force is continuously in web and base plate so that the length of single beam steel beam increases so that the proportion of anchorage retraction loss
Reduce, prestressed effective stress increases so that the web of box beam and the cracking resistance of base plate are further improved.
The technical solution of the utility model：
A kind of concrete box girder direction across bridge prestressed structure, including non-bending steel cable prestressed strand 1, C-shaped corner steel
2nd, U-shaped is anti-collapses reinforcing bar 3, anchorage 5 and anchor plate 4；Presstressed reinforcing steel uses non-bending steel cable prestressed strand 1, is set according to structure
Meter demand determines the quantity of non-bending steel cable prestressed strand 1；At the angle change of non-bending steel cable prestressed strand 1
C-shaped corner steel 2 is glued with, for supporting non-bending steel cable prestressed strand 1, the crank degree of C-shaped corner steel 2 is according to web
Angle between base plate determines that width determines according to the quantity of non-bending steel cable prestressed strand 1；U-shaped prevents that collapsing reinforcing bar 3 welds
On C-shaped corner steel 2；The two ends of non-bending steel cable prestressed strand 1 pass through anchor plate 4, and it is pre- that anchorage 5 clamps non-bending steel cable
It is anchored on anchor plate 4 after stress steel beam 1.
The beneficial effects of the utility model are that all components can be with prefabrication, in the process of box beam regular reinforcement colligation
In, directly this transverse prestress structure is arranged in box beam so that box beam can apply transverse direction in conventional upper and web
On the basis of prestressed, the transverse prestress effect of base plate is increased so that the stress performance and cracking resistance of box beam are obtained
Improve, so as to ensure that the stress safety of box beam.This kind of prefabricated property of concrete box girder transverse prestress structure is strong, arrangement spirit
Work, simple structure, stress reliability, will be used widely in the construction applications of large-span concrete box girder bridge and curved beam bridges, tool
There is good application prospect.
Brief description of the drawings
Fig. 1 is the elevation of box beam direction across bridge prestressed structure.
Fig. 2 is the space diagram of box beam direction across bridge prestressed structure.
In figure：1 non-bending steel cable prestressed strand；2 C-shaped corner steel；3 U-shapeds are anti-to collapse reinforcing bar；4 anchor plates；5 anchorages.
Specific embodiment
Specific embodiment of the present utility model is described in detail below in conjunction with technical scheme and accompanying drawing.
A kind of concrete box girder direction across bridge prestressed structure, prestressed material uses non-bending steel cable prestressed strand 1,
The quantity of non-bending steel cable prestressed strand 1 is determined according to structure Design and Calculation, the crank degree of C-shaped corner steel 2 is according to abdomen
Angle between plate and base plate determines that width determines according to the quantity of non-bending steel cable prestressed strand 1, by prefabricated C-shaped
Corner steel 2 is arranged on the junction of web and base plate, for being close to and supports non-bending steel cable prestressed strand 1；U-shaped is prevented
Collapse the side of reinforcing bar 3 to be welded with C-shaped corner steel 2, opposite side is welded with the regular reinforcement of web side and base plate bottom layer,
Non-bending steel cable prestressed strand 1 passes through anchor plate 4, anchorage 5 to be anchored in anchor after clamping non-bending steel cable prestressed strand 1
On backing plate 4.
After all components are arranged, carry out box beam concrete and pour, in back after concrete reaches design strength
Prestressing force is drawn, is anchored on anchor plate 4 by anchorage 5 after the tensioning of non-bending steel cable prestressed strand 1.
Besides these examples, all modifications made within thought of the present utility model and principle, equivalent, improvement etc.,
Should be included within protection domain of the present utility model.
Claims (1)
1. a kind of concrete box girder direction across bridge prestressed structure, it is characterised in that the concrete box girder direction across bridge prestressed structure
Prevent collapsing reinforcing bar (3), anchorage (5) and anchor plate (4) including non-bending steel cable prestressed strand (1), C-shaped corner steel (2), U-shaped；
Presstressed reinforcing steel uses non-bending steel cable prestressed strand (1), and non-bending steel cable prestressing force is determined according to structure design demand
The quantity of steel beam (1)；C-shaped corner steel (2) is glued with the angle change of non-bending steel cable prestressed strand (1), is used for
Support non-bending steel cable prestressed strand (1), the crank degree of C-shaped corner steel (2) is true according to the angle between web and base plate
Fixed, width determines according to the quantity of non-bending steel cable prestressed strand (1)；U-shaped prevents that collapsing reinforcing bar (3) is welded on C-shaped corner steel
(2) on；Non-bending steel cable prestressed strand (1) two ends pass through anchor plate (4), anchorage (5) to clamp non-bending steel cable and in advance should
It is anchored in after power steel beam (1) on anchor plate (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621419852.5U CN206289536U (en) | 2016-12-23 | 2016-12-23 | A kind of concrete box girder direction across bridge prestressed structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621419852.5U CN206289536U (en) | 2016-12-23 | 2016-12-23 | A kind of concrete box girder direction across bridge prestressed structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206289536U true CN206289536U (en) | 2017-06-30 |
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ID=59153558
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621419852.5U Withdrawn - After Issue CN206289536U (en) | 2016-12-23 | 2016-12-23 | A kind of concrete box girder direction across bridge prestressed structure |
Country Status (1)
| Country | Link |
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| CN (1) | CN206289536U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106522092A (en) * | 2016-12-23 | 2017-03-22 | 大连理工大学 | Transverse-bridge-direction prestress structure of concrete box girder |
| CN108894123A (en) * | 2018-09-04 | 2018-11-27 | 南京林业大学 | A kind of quick Shear Strengthening box-beam structure of Prestressed U type muscle and method |
| CN109356017A (en) * | 2018-10-30 | 2019-02-19 | 南昌大学 | It is a kind of to limit the Continuous Concrete Box Girders for reducing loss of prestress composite structure with self- recoverage |
| CN111469267A (en) * | 2020-04-21 | 2020-07-31 | 中南林业科技大学 | Wood-UHPC combined box girder and preparation method thereof |
-
2016
- 2016-12-23 CN CN201621419852.5U patent/CN206289536U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106522092A (en) * | 2016-12-23 | 2017-03-22 | 大连理工大学 | Transverse-bridge-direction prestress structure of concrete box girder |
| CN108894123A (en) * | 2018-09-04 | 2018-11-27 | 南京林业大学 | A kind of quick Shear Strengthening box-beam structure of Prestressed U type muscle and method |
| CN109356017A (en) * | 2018-10-30 | 2019-02-19 | 南昌大学 | It is a kind of to limit the Continuous Concrete Box Girders for reducing loss of prestress composite structure with self- recoverage |
| CN111469267A (en) * | 2020-04-21 | 2020-07-31 | 中南林业科技大学 | Wood-UHPC combined box girder and preparation method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20170630 Effective date of abandoning: 20180216 |
|
| AV01 | Patent right actively abandoned |