CN203174486U - Steel-concrete overlapping type combined beam - Google Patents
Steel-concrete overlapping type combined beam Download PDFInfo
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- CN203174486U CN203174486U CN 201320201275 CN201320201275U CN203174486U CN 203174486 U CN203174486 U CN 203174486U CN 201320201275 CN201320201275 CN 201320201275 CN 201320201275 U CN201320201275 U CN 201320201275U CN 203174486 U CN203174486 U CN 203174486U
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Abstract
The utility model discloses a steel-concrete overlapping type combined beam. The combined beam comprises a steel box beam section and concrete beam sections located at two ends of the steel box beam section, the two ends of the steel box beam section are in lap joint with the concrete beam sections, and the concrete beam sections and the steel box beam section form notch lap-joint structures mutually; by the aid of the lap-joint structures, the performance similar to hinge joint is produced, so that the degree of freedom for longitudinal rotation is provided between the steel beam section and the concrete beam sections; and meanwhile, no large constraint exists longitudinally due to the lap-joint structures, the longitudinal relative movement can be caused during creep deformation of the concrete beam sections, and the constraint on the steel beam section caused by the creep deformation of the concrete beam sections is reduced or avoided. Therefore, by the aid of the steel-concrete overlapping type combined beam, the midspan steel beam section flexible deformation caused by shrinkage and creep deformation of a long-span continuous rigid framework can be effectively reduced or avoided, the steel beam section is prevented from bearing additional loads caused by the creep deformation of the concrete beam sections, the stressed state and the usage performance of the combined beam are improved, and the service life of the combined beam is prolonged; and meanwhile, the connection structures of the steel beam section and the concrete beam sections can be simplified, the construction is simplified, the construction cost is saved, and the construction efficiency is improved.
Description
Technical field
The utility model relates to a kind of bridge, particularly a kind of steel-concrete overlapping compound beam.
Background technology
The continuous steel structure of prestressed concrete bridge is because factors such as span ability is strong, economy and beautiful appearance, is widely used at the span scope of 100m-300m.But much this class bridge has had a strong impact on the Practical Performance of bridge because there is the lasting increase of span centre amount of deflection between the operating period in the distinctive shrinkage and creep of concrete.In addition, because the concrete deadweight is bigger, along with the increase of span, the continuous steel structure of prestressed concrete bridge is just no longer suitable, thereby has limited the span of the continuous steel structure of prestressed concrete.For addressing the above problem, the bondbeam of girder steel+concrete slab has appearred, and namely the different segment at same beam adopts steel and concrete compound beam respectively, and more employing steel work replaces sections in the steel structure spanning, can effectively alleviate the bridge deadweight.The connected mode of traditional steel-concrete overlapping compound beam is that girder steel beam section is connected with concrete beam section rigidity, and is in full accord at the deformation of member of two kinds of materials of joint.Though dead load that such combining structure is light makes the girder steel beam section of span centre also along with concrete shrinkage and creep generation downwarp but be rigidly connected, and bear extra because the additional load that the concrete beam section is crept and caused; Stress and the application life of compound beam have more significantly been influenced; Simultaneously, the form of structure that is rigidly connected is various, complex structure, and construction period is longer.
Therefore need improve the structure of existing steel-concrete overlapping compound beam, can effectively reduce or avoid the firm structure of Large-Span Continuous to scratch change because of the span centre girder steel section that shrinkage and creep causes, avoid the girder steel section to bear because the additional load that the concrete beam section is crept and caused, improve stress and the functional performance of compound beam, thereby prolong the application life of compound beam; Simultaneously, can simplify the syndeton of girder steel section and concrete beam section, simplify construction.
The utility model content
In view of this, the purpose of this utility model is to disclose a kind of steel-concrete overlapping compound beam, can effectively reduce or avoid the firm structure of Large-Span Continuous to scratch change because of the span centre girder steel section that shrinkage and creep causes, avoid the girder steel section to bear because the additional load that the concrete beam section is crept and caused, improve stress and the functional performance of compound beam, thereby prolong the application life of compound beam; Simultaneously, can simplify the syndeton of girder steel section and concrete beam section, simplify construction.
A kind of steel-concrete overlapping compound beam of the present utility model comprises steel case beam section and the concrete beam section that is positioned at steel case beam section two ends, is overlapped in the concrete beam section at described steel case beam section two ends;
Further, described concrete beam Duan Yugang case beam section forms the otch bridging arrangement mutually;
Further, described concrete beam section longitudinal extension is provided with and forms the support bracket of overlap joint otch down, and steel case beam section is provided be used to being overlapped in and supports the overlap joint bracket that bracket forms the overlap joint otch;
Further, the support bracket base plate that formed by web the latter half and the base plate longitudinal extension of concrete beam section of described support bracket and support the bracket web and be combined to form;
Further, the support bracket web upper surface of described support bracket is fixed with for the supporting seat that supports the overlap joint bracket;
Further, described overlap joint bracket comprises the overlap joint bracket web corresponding with web the first half of steel case beam section and top board and overlap joint bracket top board, the steel box structure that described overlap joint bracket web is fixedlyed connected with steel case beam;
Further, in the described overlap joint bracket web with the corresponding stiffening rib slope that is provided with of the strong point of supporting seat.
The beneficial effects of the utility model: a kind of steel-concrete overlapping compound beam of the present utility model, adopt the syndeton of overlap joint, produced and be similar to hinged performance, make the degree of freedom that vertically to rotate between girder steel section and the concrete beam section, simultaneously, owing to be bridging arrangement, vertically there is not bigger constraint, can when the concrete beam section is crept, form vertically and relatively move the constraint that reduces or avoided because the concrete beam section is crept the girder steel section being produced; Thereby, the utility model can effectively reduce or avoid the firm structure of Large-Span Continuous to scratch change because of the span centre girder steel section that shrinkage and creep causes, avoid the girder steel section to bear because the additional load that the concrete beam section is crept and caused, improve stress and the functional performance of compound beam, thereby prolong the application life of compound beam; Simultaneously, can simplify the syndeton of girder steel section and concrete beam section, simplify construction, save construction cost, improve efficiency of construction.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further described:
Fig. 1 is structural representation of the present utility model;
Fig. 2 is A-A structural representation of the present utility model;
Fig. 3 is B-B structural representation of the present utility model;
Fig. 4 is C-C structural representation of the present utility model.
The specific embodiment
Fig. 1 is structural representation of the present utility model; Fig. 2 is A-A structural representation of the present utility model; Fig. 3 is B-B structural representation of the present utility model; Fig. 4 is C-C structural representation of the present utility model; As shown in the figure: a kind of steel-concrete overlapping compound beam of present embodiment, comprise steel case beam section 1 and the concrete beam section 2 that is positioned at steel case beam section 1 two ends, be overlapped in concrete beam section 2 at described steel case beam section 1 two ends; Adopt the syndeton of overlap joint, produced and be similar to hinged performance, make the degree of freedom that vertically to rotate between girder steel section and the concrete beam section.
In the present embodiment, described concrete beam section 2 forms the otch bridging arrangement mutually with steel case beam section 1; Reduce to retrain longitudinally, be more conducive to vertically rotate between steel case beam section 1 and the concrete beam section 2, be convenient to when concrete beam section 2 is crept, form vertically and relatively move the constraint that reduces or avoided because concrete beam section 2 is crept steel case beam section 1 being produced.
In the present embodiment, described concrete beam section 2 longitudinal extensions are provided with and form the support bracket 5 of overlap joint otch down, and steel case beam section 1 is provided be used to being overlapped in and supports the overlap joint bracket 3 that bracket forms the overlap joint otch; Simplify the syndeton of the joint portion of concrete beam section 2 and steel case beam 1, be beneficial to constructing operation, simplify construction sequence, and have only vertically when concrete beam section 2 is crept and relatively move.
In the present embodiment, the support bracket base plate 53 that described support bracket 5 is formed by web the latter half and the base plate longitudinal extension of concrete beam section 2 and support bracket web (51,52) and be combined to form; Support the overlap joint bracket that bracket web (51,52) is used for overlap joint upper support steel case beam section 1, make stability stronger.
In the present embodiment, support bracket web (51, the 52) upper surface of described support bracket 5 is fixed with for the supporting seat 4 that supports overlap joint bracket 3; Supporting seat 4 face that makes supports and transfers facet or some support to, reduces friction, has further avoided concrete beam section 2 to creep to the constraint of girder steel section 1; Supporting seat 4 is two, overlap joint bracket 3 is formed support side by side, guarantees stability.
In the present embodiment, described overlap joint bracket 3 comprises the overlap joint bracket web (31,32) corresponding with web the first half of steel case beam section 1 and top board and overlap joint bracket top board 33, the steel box structure that described overlap joint bracket web (31,32) is fixedlyed connected with steel case beam section 1; Guarantee steel case beam section 1 and sneak out structural stability and the globality of coagulating native beam section 2 lap-joints, strengthen the horizontal firmness of junction, make concrete beam section 2 Shi Buhui that creeps form horizontal movement, allow the axial temperature distortion of main span, never eliminate the stress that therefore causes, the span of continuous steel structure can be increased.
In the present embodiment, in described overlap joint bracket 3 webs with the corresponding stiffening rib slope 6 that is provided with of the strong point of supporting seat 4; Because concrete beam section 2 can cause the additional load of steel case beam section 2 when creeping, therefore in overlap joint bracket 3 webs, the fastness that stiffener can effectively strengthen overlap joint bracket 3 is set, guarantee the stability of lap-joint.
In the present embodiment, steel case beam section 2 and concrete beam section 1 adopt the syndeton of overlap joint to have and effectively reduce the mid-span deflection that the large-span continuous steel structure causes because of shrinkage and creep, improve the functional performance that prestressed concrete and steel work make up continuous steel structure, because moment of flexure need not transmitted in the joint portion of steel case beam section 2 and concrete beam section 1, simplified the syndeton of steel case beam section 2 and concrete beam section 1 joint portion, allow the axial temperature distortion of main span, thereby eliminate the stress that therefore causes, this kind syndeton can effectively make the span of continuous steel structure increase.
Explanation is at last, above embodiment is only unrestricted in order to the technical solution of the utility model to be described, although with reference to preferred embodiment the utility model is had been described in detail, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement the technical solution of the utility model, and not breaking away from aim and the scope of technical solutions of the utility model, it all should be encompassed in the middle of the claim scope of the present utility model.
Claims (7)
1. steel-concrete overlapping compound beam is characterized in that: comprise steel case beam section (1) and be positioned at the concrete beam section (2) at steel case beam section (1) two ends, be overlapped in concrete beam section (2) at described steel case beam section (1) two ends.
2. steel-concrete overlapping compound beam according to claim 1 is characterized in that: described concrete beam section (2) forms the otch bridging arrangement mutually with steel case beam section (1).
3. steel-concrete overlapping compound beam according to claim 2, it is characterized in that: described concrete beam section (2) longitudinal extension is provided with and forms the support bracket (5) of overlap joint otch down, and steel case beam section (1) is provided be used to being overlapped in and supports the overlap joint bracket (3) that bracket forms the overlap joint otch.
4. steel-concrete overlapping compound beam according to claim 3 is characterized in that: the support bracket base plate (53) that described support bracket (5) is formed by web the latter half and the base plate longitudinal extension of concrete beam section (2) and support the bracket web and be combined to form.
5. steel-concrete overlapping compound beam according to claim 4 is characterized in that: the support bracket web upper surface of described support bracket (5) is fixed with for the supporting seat (4) that supports the overlap joint bracket.
6. steel-concrete overlapping compound beam according to claim 5, it is characterized in that: described overlap joint bracket (3) comprises the overlap joint bracket web corresponding with web the first half of steel case beam section (1) and top board and overlap joint bracket top board (33), the steel box structure that described overlap joint bracket web is fixedlyed connected with steel case beam section (1).
7. steel-concrete overlapping compound beam according to claim 6 is characterized in that: in described overlap joint bracket (3) web with the corresponding stiffening rib slope (6) that is provided with of the strong point of supporting seat (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320201275 CN203174486U (en) | 2013-04-19 | 2013-04-19 | Steel-concrete overlapping type combined beam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320201275 CN203174486U (en) | 2013-04-19 | 2013-04-19 | Steel-concrete overlapping type combined beam |
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| Publication Number | Publication Date |
|---|---|
| CN203174486U true CN203174486U (en) | 2013-09-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320201275 Withdrawn - After Issue CN203174486U (en) | 2013-04-19 | 2013-04-19 | Steel-concrete overlapping type combined beam |
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| CN (1) | CN203174486U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103233420A (en) * | 2013-04-19 | 2013-08-07 | 林同棪国际工程咨询（中国）有限公司 | Steel-concrete lapping type combination beam |
-
2013
- 2013-04-19 CN CN 201320201275 patent/CN203174486U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103233420A (en) * | 2013-04-19 | 2013-08-07 | 林同棪国际工程咨询（中国）有限公司 | Steel-concrete lapping type combination beam |
| CN103233420B (en) * | 2013-04-19 | 2015-04-08 | 林同棪国际工程咨询（中国）有限公司 | Steel-concrete lapping type combination beam |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130904 Effective date of abandoning: 20150408 |
|
| RGAV | Abandon patent right to avoid regrant |