CN202170476U - Thickened U-shaped rib and bridge deck thereof - Google Patents
Thickened U-shaped rib and bridge deck thereof Download PDFInfo
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- CN202170476U CN202170476U CN2011202650966U CN201120265096U CN202170476U CN 202170476 U CN202170476 U CN 202170476U CN 2011202650966 U CN2011202650966 U CN 2011202650966U CN 201120265096 U CN201120265096 U CN 201120265096U CN 202170476 U CN202170476 U CN 202170476U
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Abstract
The utility model discloses a thickened U-shaped rib and a bridge deck thereof. The thickened U-shaped rib comprises a U-shaped rib bottom edge and two U-shaped rib web plates which are integrally formed with the U-shaped rib bottom edge, wherein the lower edge of the U-shaped rib is thicker than, and smoothly transitional with the two U-shaped rib web plates. According to the utility model, when the bearing capacity of the U-shaped rib is increased, the thickened U-shaped rib reduces and even eliminates the stress centralization of the U-shaped rib, so that the capacity of the thickened U-shaped rib for bearing load is improved, and further, the problem that fatigue cracks are easily generated in the using process of the bridge deck due to the stress centralization is settled; simultaneously, the structure of the U-shaped rib is changed according to the characteristic that the U-shaped rib bears flexural torque, so that the matched welding flexibility and bearing consistence of the U-shaped rib and other parts of the bridge deck are improved, thus the stress capacity of the whole bridge deck is improved, and the service life of the bridge deck is prolonged; the using number of the U-shaped ribs and cross beams is greatly reduced, so that the intersecting points of the cross beams and the U-shaped ribs are reduced, the processing workload is saved, and thus the cost of steel bridge deck is greatly reduced.
Description
Technical field
The utility model belongs to building structure and bridge engineering field, particularly a kind of thickening U type rib and bridge deck thereof.
Background technology
Bridge floor is the important component of bridge, is directly bearing pressure, impact and the shear load of vehicular load.Since nineteen fifties, Orthotropic Steel Bridge Deck has obtained using widely in bridge construction.Orthotropic Steel Bridge Deck is made up of steel bridge deck and the crossbeam and the U type rib that are welded in surface, its underpart, is welded to each other fixing between the three.Orthotropic Steel Bridge Deck is except transmitting the bridge floor load, or the ingredient of girder, and fellowship integral body is stressed, has so significantly improved structure efficiency, has tangible economic benefit.Simultaneously, because Orthotropic Steel Bridge Deck is more in light weight than the concrete bridge deck, be specially adapted on the Longspan Bridge.
The Orthotropic Steel Bridge Deck technology is used widely, and longitudinal stiffener generally adopts the rib of remaining silent of U type.Existing U type rib does not distribute according to moment of flexure and does not design and make, root edge is consistent with web thickness, has reduced the ability that U type rib bears moment of flexure greatly; Simultaneously; This rib is made through cold-rolling process; Can occur more stress after the formation and concentrate, concentrate reasons such as effect, welding processing to cause U type rib and bridge deck and crossbeam intersection location easily owing to wheel load because stress is concentrated the generation that causes fatigue crack; Particularly the position in U type rib apical margin and bridge deck, crossbeam handing-over is the intersection point of three weld seams, and its stress distribution is comparatively complicated.Because U type rib remains silent, so the weld seam of U type rib web apical margin and top board can only the monolateral welding from the outside, under the load action of wheel; Bridge deck can rotate; If weld seam is dealt with improperly here, will cause on weld edge that stress is concentrated, cause fatigue crack easily.Though existing standard requires weld seam to reach 80% floor thickness; But welding procedure can't be burnt welding; For the floor that 8mm is only arranged, this requirement has not only significantly increased difficulty of processing, and causes U type rib web to bear the effect of lever eccentric load.According to the mode of occupation of Cheng Qiao, often since here weldquality can not get guaranteeing, cause the generation of fatigue crack.
When pressure wheel different place on U type rib span; The distortion of U type rib rotates the place that U type rib and crossbeam intersect; The web of crossbeam is promoted back and forth, and the weld seam that this distortion makes U type rib be connected with cantilever diaphragm produces certain stress, causes fatigue crack.The size that relative rotation and cantilever diaphragm the third direction rigidity here of adjacent U type rib at the cantilever diaphragm place directly influences these stress.Existing measure promptly is can lower the influence of this distortion through on the cantilever diaphragm of U type rib lower end, leaving a blank; And existing standard all has specific requirement to the shape of leaving a blank with size here; And requiring here, the weld grinding of weld seam end becomes more satisfactory shape; But the work of polishing has strengthened the workload of making, and has greatly increased the cost of manufacture of cross bridge floor board, influences the supporting capacity of crossbeam simultaneously.This shows, the structure pair of orthogonal of U type rib opposite sex bridge deck influence outbalance.
Therefore; Need the U type rib that existing cross bridge floor board is used be improved; The stress that reduces even eliminate U type rib itself is concentrated, and improves the ability of its bearing load, improves bridge deck in use because stress is concentrated the problem that is easy to generate fatigue crack; Simultaneously, the characteristics of bearing moment of flexure according to U type rib change its structure, improve the uniformity of welding flexibility and carrying that cooperates of U type rib itself and other parts of bridge deck, thereby improve the stress-bearing capability of whole bridge deck.
The utility model content
In view of this; The utility model provides a kind of thickening U type rib and bridge deck thereof; Thickening U type rib reduces even the stress of eliminating U type rib itself is concentrated, and improves the ability of its bearing load, improves bridge deck in use because stress is concentrated the problem that is easy to generate fatigue crack; Simultaneously, the characteristics of bearing moment of flexure according to U type rib change its structure, improve the uniformity of welding flexibility and carrying that cooperates of U type rib itself and other parts of bridge deck, thereby improve the stress-bearing capability of whole bridge deck, the application life of raising bridge deck.
The thickening U type rib of the utility model, comprise U type rib root edge and with two webs of the integrated U type of U type rib root edge rib, the thickness of said U type rib lower edge is greater than the thickness of two webs of U type rib and seamlessly transit.
Further, the upper limb of two webs of the U type rib progressive additive that makes progress, and the outside, upper limb upper end that is positioned at two webs of U type rib has groove;
Further, said U type rib is shaped through hot rolling technology;
Further, said U type rib root edge is the arc structure that protrudes downwards;
Further, the upper limb of two webs of said U type rib is positioned at inboard upwards progressive additive;
Further; The thickness of said U type rib lower edge is 18-22mm, the thickness 6-8mm of U type rib web, and the upper limb of U type rib web makes progress progressive additive to 9-12mm; U type rib root edge arc radius is 130-150mm; The lateral dimension that groove is positioned at the upper limb upper surface of two webs of U type rib is 8-9mm, and groove bevel angle α is 45 °-55 °, and U type rib height is 260-400mm; The make progress slope of progressive additive of the upper limb of two webs of said U type rib is 1: 7-1: 10;
Further; The thickness of said U type rib lower edge is 20mm, the thickness 8mm of U type rib web, and the upper limb of U type rib web makes progress progressive additive to 11mm; U type rib root edge arc radius is 135mm; The lateral dimension that groove is positioned at the upper limb upper surface of two webs of U type rib is 8mm, and groove bevel angle α is 45, and U type rib height is 400mm; The make progress slope of progressive additive of the upper limb of two webs of said U type rib is 1: 9.
The invention also discloses a kind of bridge deck of thickening U type rib; Said bridge deck soffit is welded with crossbeam and U type rib forms Orthotropic Steel Bridge Deck; Said U type rib longitudinally is welded in the bridge deck bottom, and its two ends are welded in respectively on the corresponding crossbeam, and said bridge deck thickness is 14-18mm; Said U type rib longitudinally is welded in the bridge deck bottom, and the ratio of vertical span of said U type rib and U type rib height is 15-25; Spacing and the ratio between the bridge deck thickness between the adjacent U type rib are 21-24.
Further, said bridge deck thickness is 18mm, and the ratio of vertical span of said U type rib and U type rib height is 21; Spacing and the ratio between the bridge deck thickness between the adjacent U type rib are 22;
Further, be welded with horizontal stiffening rib on the said cantilever diaphragm, horizontal stiffening rib is positioned at the bottom of U type rib root edge.
The beneficial effect of the utility model: the thickening U type rib and the bridge deck thereof of the utility model; To pointed the improving of structure of U type rib, thicken processing for the root edge that bears main positive bending moment, and seamlessly transit with its web; When increasing its supporting capacity; Thickening U type rib reduces even the stress of eliminating U type rib itself is concentrated, and improves the ability of its bearing load, thereby improves bridge deck in use because stress is concentrated the problem that is easy to generate fatigue crack; Simultaneously, the characteristics of bearing moment of flexure according to U type rib change its structure, improve the uniformity of welding flexibility and carrying that cooperates of U type rib itself and other parts of bridge deck, thereby improve the stress-bearing capability of whole bridge deck, the application life of raising bridge deck.
The U type floor of the utility model is used for bridge deck; Compared with prior art, reduce the usage quantity of U type rib and crossbeam in a large number, thereby the intersection point of crossbeam and U type rib is reduced; Save the workload of processing greatly, also greatly reduce the cost of cross bridge floor board naturally.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the utility model is further described.
Fig. 1 is the U type rib cross section and the application structure sketch map thereof of the utility model;
Fig. 2 is Figure 1A place enlarged drawing;
Fig. 3 is the distributed architecture sketch map of U type rib on bridge deck.
The specific embodiment
Fig. 1 is the U type rib cross section and the application structure sketch map thereof of the utility model; Fig. 2 is Figure 1A place enlarged drawing; Fig. 3 is the distributed architecture sketch map of U type rib on bridge deck; As shown in the figure: the thickening U type rib of present embodiment; Comprise U type rib root edge 11 and with two webs of U type rib root edge 11 integrated U type ribs (be respectively among the figure U type rib web 12 with U type rib web 12a), the thickness of said U type rib lower edge 11 is greater than the thickness of two webs of U type rib (U type rib web 12 and U type rib web 12a) and seamlessly transit.
In the present embodiment; The upper limb of 1 two webs of U type rib (U type rib web 12 with U type rib web 12a) (be upper limb 13 and upper limb 13a among the figure) is progressive additive upwards, and upper limb (upper limb 13 and the upper limb 13a) outside, upper end that is arranged in two webs of U type rib (U type rib web 12 and U type rib web 12a) has groove (figure is groove 5 and groove 5a); The make progress structure of progressive additive of the upper limb 13 of U type rib web 12 and the upper limb 13a of U type rib web 12a has strengthened U type rib and has born the ability of moment of flexure, thereby further increased its stability; Simultaneously, be beneficial to and widen groove, increase the depth of weld, the welding difficulty of reduction has been simplified welding procedure, avoids U type rib web to bear the effect of lever eccentric load, guarantees weldquality here, eliminates the generation of fatigue crack.
In the present embodiment, said U type rib 1 is shaped through hot rolling technology; Hot rolling technology has stress and concentrates for a short time, and moulding is easy to characteristics, improves U type rib 1 process industrial art performance, reduces or eliminates manufacturing defect.
In the present embodiment, said U type rib root edge 11 is the arc structure that protrudes downwards; It is concentrated not only further to eliminate stress, and increase root edge that can also be bigger bears the ability of moment of flexure.
In the present embodiment, the upper limb 13 of said U type rib web 12 and the upper limb 13a of U type rib web 12a are positioned at inboard upwards progressive additive, and the inboard is meant that the U type is inboard; Behind the bevel, groove width and U type rib 1 are aligned; And the outside, upper limb 13a upper end groove (groove 5 and the groove 5a) size of the upper limb 13 of U type rib web 12 and U type rib web 12a is more than or equal to U type rib web body thickness; U type rib web body is meant that web goes out the part of upper limb; This structure make weld seam and U type rib web body over against, eliminate eccentric welding, thereby guarantee welding quality, improve the distribution of stress, prolong the life-span of weld seam and structure.
In the present embodiment; The thickness of said U type rib lower edge is 18-22mm, the thickness 6-8mm of U type rib web, and the upper limb of U type rib web makes progress progressive additive to 9-12mm; U type rib root edge arc radius is 130-150mm; The lateral dimension that groove is positioned at the upper limb upper surface of two webs of U type rib is 8-9mm, and groove bevel angle α is 45 °-55 °, and U type rib height is 260-400mm; The make progress slope of progressive additive of the upper limb of two webs of said U type rib is 1: 7-1: 10; U type rib height is meant the distance between its lower end (root edge soffit) to the upper end (upper limb upper end); Increase height in terms of existing technologies, can significantly increase U type rib rigidity, can increase U type rib in use and stride the footpath, thereby realized reducing to be out of shape and to increase the purpose of span; Above-mentioned span cooperatively interacts, and influences each other and restricts, and is adapted to existing bridge deck physical dimension, in conjunction with the molding mode of the utility model U type rib, guarantees the whole mechanical property after U type rib uses.
In the present embodiment; The thickness of said U type rib lower edge is 20mm, the thickness 8mm of U type rib web, and the upper limb of U type rib web makes progress progressive additive to 11mm; U type rib root edge arc radius is 135mm; The lateral dimension that groove is positioned at the upper limb upper surface of two webs of U type rib is 8mm, and groove bevel angle α is 45 °, and U type rib height is 380mm; The make progress slope of progressive additive of the upper limb of two webs of said U type rib is 1: 8; Above parameter is the optimization value to the aforementioned parameters scope, is used for the versatility that bridge deck can have big parameter area, and carrying capacity and intensity aspect are the optimal parameter combination.
The invention also discloses a kind of bridge deck of using thickening U type rib; Said bridge deck 2 soffits are welded with crossbeam 3 and form Orthotropic Steel Bridge Deck with U type rib 1, and said U type rib 1 longitudinally is welded in bridge deck 2 bottoms, and its two ends are welded in respectively on the corresponding crossbeam 3; Said bridge deck thickness is 14-18mm; Said U type rib longitudinally is welded in the bridge deck bottom, and the ratio of vertical span of said U type rib and U type rib height is 15-25, about about 4-10m; Spacing between the adjacent U type rib and the ratio between the bridge deck thickness are 21-24, about about 680-850mm; With respect to prior art, the U type rib 1 of the utility model is used for bridge floor, 2; U type rib 1 span and horizontal spacing are increased, increase and reduce bridge deck and between U type rib, stride thickness rate, be more suitable in bearing bigger load; The transverse distribution of load also increases gradually; Wheel load is born by a U type rib 1 no longer separately, and the relative deformation between the maximum distortion of U type rib 1 and the U type rib 1 reduces, and the weld seam that improves between U type rib and the cantilever diaphragm is stressed.
In the present embodiment, said bridge deck 2 thickness are 18mm, and the ratio of vertical span of said U type rib 1 and U type rib 1 height is 21; Spacing between the adjacent U type rib and the ratio between bridge deck 2 thickness are 22; Above-mentioned ratio is optimum ratio, is applied to engineering practice and reaches supporting effect preferably, and obviously prolong than other parameter of prior art and the utility model application life.
In the present embodiment, be welded with horizontal stiffening rib 4 on said crossbeam 3 webs, horizontal stiffening rib 4 is positioned at the bottom of U type rib root edge 11; Because the increase of U type rib 1 height, horizontal stiffening rib moves down, and suitably reduces cantilever diaphragm rigidity; Improved adaptation third direction deformation ability; Avoid of the constraint of U type rib to cantilever diaphragm top, thus the top rake of avoiding on cantilever diaphragm, being provided with U type rib bottom leave a blank, U type rib and crossbeam be connected can be outside the U type rib from an end around the continuous welding of U type rib; Also omit leave a blank the very much bore ends polishing work of the artificial top rake of expense, simplified procedure of processing.
Explanation is at last; Above embodiment is only unrestricted in order to the technical scheme of explanation the utility model; Although with reference to preferred embodiment the utility model is specified, those of ordinary skill in the art should be appreciated that and can make amendment or be equal to replacement the technical scheme of the utility model; And not breaking away from the aim and the scope of the utility model technical scheme, it all should be encompassed in the middle of the claim scope of the utility model.
Claims (10)
1. thickening U type rib is characterized in that: comprise U type rib root edge and with two webs of the integrated U type of U type rib root edge rib, the thickness of said U type rib lower edge is greater than the thickness of two webs of U type rib and seamlessly transit.
2. thickening U type rib according to claim 1 is characterized in that: the upper limb of two webs of the U type rib progressive additive that makes progress, and the outside, upper limb upper end that is positioned at two webs of U type rib has groove.
3. thickening U type rib according to claim 2 is characterized in that: said U type rib is shaped through hot rolling technology.
4. thickening U type rib according to claim 3 is characterized in that: the arc structure of said U type rib root edge for protruding downwards.
5. according to the described thickening U of the arbitrary claim of claim 1 to 4 type rib, it is characterized in that: the upper limb of two webs of said U type rib is positioned at inboard upwards progressive additive.
6. thickening U type rib according to claim 5; It is characterized in that: the thickness of said U type rib lower edge is 18-22mm, the thickness 6-8mm of U type rib web, and the upper limb of U type rib web makes progress progressive additive to 9-12mm; U type rib root edge arc radius is 130-150mm; The lateral dimension that groove is positioned at the upper limb upper surface of two webs of U type rib is 8-9mm, and groove bevel angle α is 45 °-55 °, and U type rib height is 260-400mm; The make progress slope of progressive additive of the upper limb of two webs of said U type rib is 1: 7-1: 10.
7. thickening U type rib according to claim 6; It is characterized in that: the thickness of said U type rib lower edge is 20mm, the thickness 8mm of U type rib web, and the upper limb of U type rib web makes progress progressive additive to 11mm; U type rib root edge arc radius is 135mm; The lateral dimension that groove is positioned at the upper limb upper surface of two webs of U type rib is 8mm, and groove bevel angle α is 45 °, and U type rib height is 380mm; The make progress slope of progressive additive of the upper limb of two webs of said U type rib is 1: 8.
8. an application rights requires the bridge deck of 1 described thickening U type rib; Said bridge deck soffit is welded with crossbeam and U type rib forms Orthotropic Steel Bridge Deck; Said U type rib longitudinally is welded in the bridge deck bottom, and its two ends are welded in respectively on the corresponding crossbeam, and it is characterized in that: said bridge deck thickness is 14-18mm; Said U type rib longitudinally is welded in the bridge deck bottom, and the ratio of vertical span of said U type rib and U type rib height is 15-25; Spacing and the ratio between the bridge deck thickness between the adjacent U type rib are 21-24.
9. bridge deck according to claim 8 is characterized in that: said bridge deck thickness is 18mm, and the ratio of vertical span of said U type rib and U type rib height is 21; Spacing and the ratio between the bridge deck thickness between the adjacent U type rib are 22.
10. bridge deck according to claim 9 is characterized in that: be welded with horizontal stiffening rib on the said cantilever diaphragm, horizontal stiffening rib is positioned at the bottom of U type rib root edge.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011202650966U CN202170476U (en) | 2011-07-25 | 2011-07-25 | Thickened U-shaped rib and bridge deck thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011202650966U CN202170476U (en) | 2011-07-25 | 2011-07-25 | Thickened U-shaped rib and bridge deck thereof |
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| CN202170476U true CN202170476U (en) | 2012-03-21 |
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| CN2011202650966U Expired - Lifetime CN202170476U (en) | 2011-07-25 | 2011-07-25 | Thickened U-shaped rib and bridge deck thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102926320A (en) * | 2012-11-19 | 2013-02-13 | 武汉钢铁(集团)公司 | U-shaped variable-cross-section hot rolling reinforcing rib for bridge and production process thereof |
| CN103437278A (en) * | 2013-07-24 | 2013-12-11 | 广东省公路勘察规划设计院股份有限公司 | Variable-section U-shaped reinforcing rib structure of steel box girder roof of bridge |
| CN103669206A (en) * | 2013-10-24 | 2014-03-26 | 沈阳建筑大学 | Steel bridge deck structure and steel bridge deck structure constructing method |
| CN104947587A (en) * | 2015-05-21 | 2015-09-30 | 北京百善重工有限公司 | U-shaped rib and manufacturing method thereof |
| CN108265625A (en) * | 2018-01-28 | 2018-07-10 | 北京工业大学 | A kind of U-shaped rib and processing method |
-
2011
- 2011-07-25 CN CN2011202650966U patent/CN202170476U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102926320A (en) * | 2012-11-19 | 2013-02-13 | 武汉钢铁(集团)公司 | U-shaped variable-cross-section hot rolling reinforcing rib for bridge and production process thereof |
| CN102926320B (en) * | 2012-11-19 | 2015-08-12 | 武汉钢铁(集团)公司 | The U-shaped ribs of bridge variable cross-section hot rolling and production technology thereof |
| CN103437278A (en) * | 2013-07-24 | 2013-12-11 | 广东省公路勘察规划设计院股份有限公司 | Variable-section U-shaped reinforcing rib structure of steel box girder roof of bridge |
| CN103669206A (en) * | 2013-10-24 | 2014-03-26 | 沈阳建筑大学 | Steel bridge deck structure and steel bridge deck structure constructing method |
| CN104947587A (en) * | 2015-05-21 | 2015-09-30 | 北京百善重工有限公司 | U-shaped rib and manufacturing method thereof |
| CN108265625A (en) * | 2018-01-28 | 2018-07-10 | 北京工业大学 | A kind of U-shaped rib and processing method |
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Granted publication date: 20120321 |