CN203212999U - Vertical mixed continuous beam system of concrete beam and corrugated steel web concrete beam - Google Patents
Vertical mixed continuous beam system of concrete beam and corrugated steel web concrete beam Download PDFInfo
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- CN203212999U CN203212999U CN 201320147039 CN201320147039U CN203212999U CN 203212999 U CN203212999 U CN 203212999U CN 201320147039 CN201320147039 CN 201320147039 CN 201320147039 U CN201320147039 U CN 201320147039U CN 203212999 U CN203212999 U CN 203212999U
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Abstract
The utility model discloses a vertical mixed continuous beam system of a concrete beam and a corrugated steel web concrete beam, and belongs to the technical field of beam bridges. The vertical mixed continuous beam system comprises a concrete beam section arranged on a bridge pier, and a corrugated steel web concrete beam section arranged on the mid-span section and the side-span section of the beam body and fixedly connected with the concrete beam section, wherein the length of the concrete beam section is 1/4-1/2 of the span of the main span of the continuous beam. The concrete beam section and the corrugated steel web concrete beam section are vertically connected to form the continuous beam system, wherein the concrete beam section with relatively large dead weight is arranged on the bridge pier below the beam body, and the corrugated steel web concrete beam section with relatively small dead weight is arranged on the mid-span section and the side-span section of the beam body, and the above two sections are vertically mixed, so as to conquer the respective defects of the single concrete beam system or the single corrugated steel web concrete beam system, ensure the rigidity of the whole system, and prevent the mid-span section from continuously warping downwards and cracking due to increase of the span of the beam bridge.
Description
Technical field
The utility model relates to a kind of composite continuous beam, particularly relates to vertical composite continuous beam of a kind of concrete beam-Wavelike steel webplate concrete beam.
Background technology
Strode below the 250m of footpath is that advantages such as the scope of application of beam bridge, particularly concrete continuous beam are big because of its integral rigidity, and it is comfortable to drive a vehicle are extensive use of in the past.But the discovery of engineering practice in recent years concrete beam is being striden the footpath above after the 150m, and it is more outstanding that the span centre section of beam body continues disease problems such as downwarp, web cracking, and many bridges just need carry out strengthening reconstruction when reaching design life far away.Its reason is to stride the footpath, and to be increased to a certain degree back concrete beam deadweight bigger, and it is excessive to account for design internal force ratio, the shearing resistance of concrete web, tensile strength relative deficiency.
In order to solve these diseases, a scheme commonly used is not change structural meterials, still adopts concrete beam, just strengthens the size at each position of concrete beam beam body section, and the consumption of corresponding increase prestressed reinforcement and plain bars.Also having a kind of scheme is that a kind of new combining structure that occurred in recent years is the Wavelike steel webplate concrete beam.The Wavelike steel webplate concrete beam refers to that top, base plate adopt concrete, and web adopts the vertical folding case beam of waveform steel.Wavelike steel webplate has replaced concrete web case beam weight reduction, the minimizing of dead load internal force afterwards, the web crack can not occur.In addition because the fold effect of Wavelike steel webplate, concrete top, base plate bore moment of flexure when the beam body was subjected to bend, and Wavelike steel webplate bears shearing, and Each performs its own functions for roof and floor concrete, Wavelike steel webplate, take full advantage of the advantage separately of material, brought into play the advantage of combining structure well.
The way of concrete beam enlarging section size no doubt can make the supporting capacity of beam body improve, but dead load also strengthened when supporting capacity improved, need to increase more plain bars and prestressed reinforcement, three material use quantity indexs rise rapidly, after particularly the concrete continuous beam span surpasses 200m, the investment increase of engineering is too big, and its competitiveness is inferior to cable stayed bridge.Therefore in these years the Competent Authorities of Transport and Communications disapprove build continuous girder bridge more than striding footpath 200m.
The Wavelike steel webplate concrete beam has obtained deep research and has used widely in Japan in recent years, becomes the recommendation bridge type of Japanese expressway.Its anti-seismic performance is good, easy construction, better economy, has solved the problem of concrete web cracking.But because there is the stable problem of flexing in Wavelike steel webplate self, it is too high that web height can not be done, so the footpath of striding of Wavelike steel webplate concrete beam is confined in the 150m, and China has built up maximum Wavelike steel webplate concrete girder span and directly is 120m at present.Therefore, the appearance of the Wavelike steel webplate concrete bridge lasting downwarp of continuous girder bridge span centre section of unresolved 150-250m still and the problem of web cracking.
So-called concrete beam is the case beam that top board, base plate and web all adopt concrete material, and so-called Wavelike steel webplate concrete beam is that top board, base plate adopt concrete material, and web adopts the vertical folding case beam of waveform steel.
The utility model content
For addressing the above problem, the utility model provides a kind of vertical composite continuous beam system of avoiding beam bridge to cause the span centre section to continue the concrete beam-Wavelike steel webplate concrete beam of downwarp and cracking because span increases.
The technical scheme that its technical problem that solves the utility model adopts is: vertical composite continuous beam system of concrete beam-Wavelike steel webplate concrete beam, comprise the concrete beam section that is located on the bridge pier and be located at the Wavelike steel webplate concrete beam section that beam body span centre section and end bay Duan Bingyu concrete beam section are fixedlyed connected that the concrete beam section length is striden 1/4～1/2 of footpath for the continuous beam main span.
Be further used as the improvement of technical solutions of the utility model, concrete beam section and Wavelike steel webplate concrete beam section are provided with the transition adapter section at the place of interconnecting.
Be further used as the improvement of technical solutions of the utility model, the steel web of waveform steel web concrete beam section stretches in the web of concrete beam section in the transition adapter section, and be provided with diaphragm in the side near the concrete beam section, the transition adapter section is provided with concrete lining in the inboard of steel web.
Be further used as the improvement of technical solutions of the utility model, the concrete beam section is provided with in top board along the beam body first top board prestressing tendon longitudinally, is provided with in web along beam body curved web prestressing tendon vertically and under the two ends.
Be further used as the improvement of technical solutions of the utility model, Wavelike steel webplate concrete beam section is respectively equipped with in top board and base plate along beam the body second top board prestressing tendon and baseboard prestress bundle longitudinally, vertically also is provided with the middle diaphragm of some each intervals in the Wavelike steel webplate concrete beam section along the beam body.
Be further used as the improvement of technical solutions of the utility model, be provided with in concrete beam section and the Wavelike steel webplate concrete beam section along beam body external pre-stress bundle longitudinally, this external pre-stress bundle is arranged in parallel to diaphragm and following curved base plate upper limb to Wavelike steel webplate concrete beam section span centre section gradually after passing diaphragm along the top board lower edge in the concrete beam section, and the upside of diaphragm is provided with the steering block of some change external pre-stress bundles trends below top board.
Be further used as the improvement of technical solutions of the utility model, the steel web of waveform steel web concrete beam section stretches into the length 〉=2m in the concrete beam section web in the transition adapter section.
Be further used as the improvement of technical solutions of the utility model, the two ends of web prestressing tendon are equipped with mooring anchor, mooring anchor comprise be located at the web anchor in the web and be located on the described diaphragm every the beam anchor.
The beneficial effects of the utility model: in the utility model, concrete beam section and Wavelike steel webplate concrete beam section longitudinally link together and constitute the continuous beam system.Wherein the bigger concrete beam section of deadweight is located on the bridge pier of beam body below, and the Wavelike steel webplate concrete beam section of conducting oneself with dignity less is positioned at span centre and the end bay section of beam body, by vertical mixing, overcome the shortcoming separately of concrete beam or Wavelike steel webplate concrete beam unitary system, when having guaranteed whole system stiffness, the span centre section of having avoided beam bridge to cause because span increases continues downwarp and cracking.
Description of drawings
The utility model is described in further detail below in conjunction with accompanying drawing:
Fig. 1 is the overall structure schematic diagram of the utility model embodiment;
Fig. 2 is the prestressing tendon arrangement schematic diagram of the utility model embodiment;
Fig. 3 is the Wavelike steel webplate concrete beam section structure schematic diagram of the utility model embodiment;
Fig. 4 is the concrete beam section structure schematic diagram of the utility model embodiment;
Fig. 5 is the transition adapter section vertical section structure schematic diagram of the utility model embodiment;
Fig. 6 is the transition adapter section cross-sectional structure schematic diagram of the utility model embodiment;
Fig. 7 is the transition adapter section profile of the utility model embodiment.
The specific embodiment
In the prior art, so-called concrete beam is the case beam that top board, base plate and web all adopt concrete material, and so-called Wavelike steel webplate concrete beam is that top board, base plate adopt concrete material, and web adopts the vertical folding case beam of waveform steel.
With reference to Fig. 1-Fig. 7, the utility model provides vertical composite continuous beam system of a kind of concrete beam-Wavelike steel webplate concrete beam, comprise the concrete beam section 2 that is located on the bridge pier 1 and be located at the Wavelike steel webplate concrete beam section 3 that beam body span centre section and end bay Duan Bingyu concrete beam section 2 are fixedlyed connected that the length of concrete beam section 2 is striden 1/4～1/2 of footpath for the continuous beam main span.
As the utility model preferred embodiment, concrete beam section 2 and Wavelike steel webplate concrete beam section 3 are provided with transition adapter section 4 at the place of interconnecting.
In the utility model, concrete beam section 2 longitudinally links together by transition adapter section 4 with Wavelike steel webplate concrete beam section 3 and constitutes the continuous beam system.Wherein the bigger concrete beam section 2 of deadweight is located on the bridge pier 1 of beam body below, length is striden 1/4～1/2 of footpath for the continuous beam main span, guaranteed the rigidity of whole system, and the Wavelike steel webplate concrete beam section 3 of conducting oneself with dignity less is positioned at span centre and the end bay section of beam body, length is striden 1/2～3/4 of footpath for the continuous beam main span, Wavelike steel webplate concrete beam section 3 has avoided beam bridge span centre section to continue downwarp and cracking as the agent structure of whole continuous beam system span centre section and end bay section.By vertical mixing, overcome the shortcoming separately of concrete beam or Wavelike steel webplate concrete beam unitary system, and accomplish good looking appearance, cost rationally, easy construction, for the beam bridge of large span provides desirable bridge type.
As the utility model preferred embodiment, the steel web 31 of waveform steel web concrete beam section 3 stretches in the web 21 of concrete beam section 2 in the transition adapter section 4, and built-in length 〉=2m, transition adapter section 4 is provided with diaphragm 41 in the side near concrete beam section 2, transition adapter section 4 is provided with concrete lining 42 in the inboard of steel web 31, through transition adapter section 4 transition connect after, the deck-molding of vertical composite continuous beam system of concrete beam-Wavelike steel webplate concrete beam is curvilinear motion, equation of change is 1.6～2.0 parabolas, concrete lining 42 is used for realizing the stressed transition between web 21 and the steel web 31, and the peg connection is adopted in being connected between concrete lining 42 and the steel web 31.
As the utility model preferred embodiment, concrete beam section 2 is provided with in top board 5 along the beam body first top board prestressing tendon 22 longitudinally, in web 21, be provided with along beam body curved web prestressing tendon 23 vertically and under the two ends, wherein the first top board prestressing tendon 22 is used for bending resistance, and web prestressing tendon 23 is used for shearing resistance.
As the utility model preferred embodiment, Wavelike steel webplate concrete beam section 3 is respectively equipped with in top board 5 and base plate 6 along beam the body second top board prestressing tendon 32 and baseboard prestress bundle 33 longitudinally, is used for bending resistance.Vertically also be provided with the middle diaphragm 34 of some each intervals in the Wavelike steel webplate concrete beam section 3 along the beam body, middle diaphragm 34 is to increase the torsional rigidity of beam body, determining of middle diaphragm 34 maximum spacings, so that under the eccentric load effect of worst track, the amount of deflection difference of each steel web 31 of same cross section place is as the criterion within 15%.Middle diaphragm 34 is cast in top board 5, base plate 6, and adopts peg to link together between the steel web 31.
As the utility model preferred embodiment, be provided with in concrete beam section 2 and the Wavelike steel webplate concrete beam section 3 along beam body external pre-stress bundle 7 longitudinally, be used for shearing resistance and bending resistance, this external pre-stress bundle 7 is arranged in parallel to diaphragm 41 and following curved base plate 6 upper limbs to Wavelike steel webplate concrete beam section 3 span centre sections gradually after passing diaphragm 41 along top board 5 lower edges in concrete beam section 2, and the upside of diaphragm 41 is provided with the steering block 71 of some change external pre-stress bundles 7 trends below top board 5.
As the utility model preferred embodiment, the two ends of web prestressing tendon 23 are equipped with mooring anchor, mooring anchor comprise the web anchor 24 that is located in the web 21 and be located on the diaphragm 41 every beam anchor 43, the setting of diaphragm 41, be used for turning to of external pre-stress bundle 7 on the one hand, be used for web prestressing tendon 23 on the other hand by the stretch-draw anchor every beam anchor 43, and improve bending resistance and the torsional rigidity of whole system.
It is C50 and above high-strength concrete that the concrete of vertical composite continuous beam system of concrete beam-Wavelike steel webplate concrete beam should adopt label; Corrugated sheet steel should adopt the above steel of Q345 rank, preferably adopts weathering steel; The first top board prestressing tendon 22, the second top board prestressing tendon 32, web prestressing tendon 23 and external pre-stress bundle 7 adopt strand1860 underrelaxation steel strand.
Certainly, the invention is not limited to above-mentioned embodiment, those of ordinary skill in the art also can make equivalent variations or replacement under the prerequisite of the utility model spirit, the modification that these are equal to or replacement all are included in the application's claim institute restricted portion.
Claims (8)
1. vertical composite continuous beam system of concrete beam-Wavelike steel webplate concrete beam, it is characterized in that: comprise the concrete beam section (2) that is located on the bridge pier (1) and be located at the Wavelike steel webplate concrete beam section (3) that the described concrete beam section of beam body span centre section and end bay Duan Bingyu (2) is fixedlyed connected that the length of described concrete beam section (2) is striden 1/4～1/2 of footpath for the continuous beam main span.
2. vertical composite continuous beam system of concrete beam according to claim 1-Wavelike steel webplate concrete beam is characterized in that: described concrete beam section (2) is provided with transition adapter section (4) with Wavelike steel webplate concrete beam section (3) at the place of interconnecting.
3. vertical composite continuous beam system of concrete beam according to claim 2-Wavelike steel webplate concrete beam, it is characterized in that: the steel web (31) of waveform steel web concrete beam section (3) stretches in the web (21) of concrete beam section (2) in the described transition adapter section (4), and be provided with diaphragm (41) in the side near concrete beam section (2), described transition adapter section (4) is provided with concrete lining (42) in the inboard of steel web (31).
4. vertical composite continuous beam system of concrete beam according to claim 3-Wavelike steel webplate concrete beam, it is characterized in that: described concrete beam section (2) is provided with in top board (5) along the beam body first top board prestressing tendon (22) longitudinally, is provided with in web (21) along beam body curved web prestressing tendon (23) vertically and under the two ends.
5. vertical composite continuous beam system of concrete beam according to claim 4-Wavelike steel webplate concrete beam, it is characterized in that: described Wavelike steel webplate concrete beam section (3) is respectively equipped with in top board (5) and base plate (6) along beam the body second top board prestressing tendon (32) and baseboard prestress bundle (33) longitudinally, vertically also is provided with the middle diaphragm (34) of some each intervals in the described Wavelike steel webplate concrete beam section (3) along the beam body.
6. vertical composite continuous beam system of concrete beam according to claim 3-Wavelike steel webplate concrete beam, it is characterized in that: be provided with in described concrete beam section (2) and the Wavelike steel webplate concrete beam section (3) along beam body external pre-stress bundle (7) longitudinally, this external pre-stress bundle (7) is arranged in parallel to described diaphragm (41) and following curved base plate (6) upper limb to Wavelike steel webplate concrete beam section (3) span centre section gradually after passing described diaphragm (41) along top board (5) lower edge in concrete beam section (2), and the upside of described diaphragm (41) is provided with the steering block (71) of some change external pre-stress bundles (7) trend in the below of top board (5).
7. according to vertical composite continuous beam system of claim 3,4,5 or 6 described concrete beam-Wavelike steel webplate concrete beam, it is characterized in that: the steel web (31) of waveform steel web concrete beam section (3) stretches into the length 〉=2m in concrete beam section (2) web (21) in the described transition adapter section (4).
8. vertical composite continuous beam system of concrete beam according to claim 4-Wavelike steel webplate concrete beam, it is characterized in that: the two ends of described web prestressing tendon (23) are equipped with mooring anchor, described mooring anchor comprise be located at the web anchor (24) in the web (21) and be located on the described diaphragm (41) every beam anchor (43).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320147039 CN203212999U (en) | 2013-03-27 | 2013-03-27 | Vertical mixed continuous beam system of concrete beam and corrugated steel web concrete beam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320147039 CN203212999U (en) | 2013-03-27 | 2013-03-27 | Vertical mixed continuous beam system of concrete beam and corrugated steel web concrete beam |
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| Publication Number | Publication Date |
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| CN203212999U true CN203212999U (en) | 2013-09-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320147039 Withdrawn - After Issue CN203212999U (en) | 2013-03-27 | 2013-03-27 | Vertical mixed continuous beam system of concrete beam and corrugated steel web concrete beam |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103161122A (en) * | 2013-03-27 | 2013-06-19 | 广东省冶金建筑设计研究院 | Longitudinal mixed continuous beam system with concrete beams and corrugated steel web concrete beams |
| CN113215949A (en) * | 2021-03-05 | 2021-08-06 | 湖南科技大学 | Prefabricated assembled UHPC-corrugated steel web plate combined box girder bridge and construction method |
| CN115125822A (en) * | 2022-09-05 | 2022-09-30 | 湖南大学 | Prestressed UHPC-NC mixed system continuous box girder bridge and construction method thereof |
-
2013
- 2013-03-27 CN CN 201320147039 patent/CN203212999U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103161122A (en) * | 2013-03-27 | 2013-06-19 | 广东省冶金建筑设计研究院 | Longitudinal mixed continuous beam system with concrete beams and corrugated steel web concrete beams |
| CN103161122B (en) * | 2013-03-27 | 2015-05-27 | 广东省冶金建筑设计研究院 | Longitudinal mixed continuous beam system with concrete beams and corrugated steel web concrete beams |
| CN113215949A (en) * | 2021-03-05 | 2021-08-06 | 湖南科技大学 | Prefabricated assembled UHPC-corrugated steel web plate combined box girder bridge and construction method |
| CN115125822A (en) * | 2022-09-05 | 2022-09-30 | 湖南大学 | Prestressed UHPC-NC mixed system continuous box girder bridge and construction method thereof |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130925 Effective date of abandoning: 20150527 |
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| RGAV | Abandon patent right to avoid regrant |