CN103161122B - Longitudinal mixed continuous beam system with concrete beams and corrugated steel web concrete beams - Google Patents
Longitudinal mixed continuous beam system with concrete beams and corrugated steel web concrete beams Download PDFInfo
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- CN103161122B CN103161122B CN201310102511.XA CN201310102511A CN103161122B CN 103161122 B CN103161122 B CN 103161122B CN 201310102511 A CN201310102511 A CN 201310102511A CN 103161122 B CN103161122 B CN 103161122B
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Abstract
The invention discloses a longitudinal mixed continuous beam system with concrete beams and corrugated steel web concrete beams, and belongs to the filed of beam bridges. The longitudinal mixed continuous beam system with the concrete beams and the corrugated steel web concrete beams comprises concrete beam zones arranged on piers and corrugated steel web concrete beam zones which are arranged in the span middle section and side span sections and a beam body and are fixedly connected with the concrete beam zones, and the length of each concrete beam zone accounts for 1/4-1/2 of the main span of a continuous beam. The concrete beam zones and the corrugated steel web concrete beam zones are connected along the longitudinal direction to form the continuous beam system, the concrete beam zones with larger self-weight are arranged on the piers under the beam body, and the corrugated steel web concrete beam zones with smaller self-weight are arranged in the span middle section and the side span sections of the beam body. By means of longitudinal mixing, the respective defects of a single system with the concrete beams or a single system the corrugated steel web concrete beams are overcome, the rigidity of the whole system is guaranteed, and continuous down-warping and crack caused by increase of the span of the beam bridge are avoided.
Description
Technical field
The present invention relates to a kind of composite continuous beam, particularly relate to longitudinal composite continuous beam of a kind of concrete beam-Wavelike steel webplate concrete beam.
Background technology
The scope of application, particularly concrete continuous beam that across footpath below 250m were beam bridge large because of its integral rigidity in the past, and the advantage such as to drive a vehicle comfortable is widely used.But engineering practice in recent years find concrete beam across footpath more than 150m after, it is more outstanding that the span centre section of beam body continues the disease such as downwarp, cracking in webs problem, and many bridges just need when reaching far away design life to carry out strengthening reconstruction.It is comparatively large that its reason is to be increased to concrete beam deadweight to a certain degree across footpath, accounts for design internal force ratio excessive, concrete web shearing resistance, tensile strength relative deficiency.
In order to solve these diseases, a conventional scheme is not change structure material, 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.A kind of scheme is also had to be a kind of new combining structure and Wavelike steel webplate concrete beam that occurred in recent years.Wavelike steel webplate concrete beam refers to top, base plate adopts concrete, and web adopts the vertical folding case beam of waveform steel.Wavelike steel webplate instead of rear cabinet beam weight reduction, the minimizing of dead load internal force of concrete web, there will not be Web cracks.In addition due to the fold effect of Wavelike steel webplate, beam body bears moment of flexure by concrete top, base plate time curved, 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 respective advantage of material, 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 strengthens while supporting capacity improves, need to increase more plain bars and prestressed reinforcement, three material use quantity indexs rise rapidly, particularly concrete continuous beam span is more than after 200m, the investment increase of engineering is too large, and its competitiveness is inferior to cable stayed bridge.Therefore in these years Competent Authorities of Transport and Communications disapprove build continuous girder bridge across footpath more than 200m.
Wavelike steel webplate concrete beam in recent years obtains deep research in Japan and applies widely, becomes the recommendation bridge type of Japanese expressway.Its anti-seismic performance is good, easy construction, better economy, solves the problem of concrete web cracking.But because Wavelike steel webplate self exists the stable problem of flexing, it is too high that web height can not do, therefore Wavelike steel webplate concrete beam be confined to 150m across footpath within, at present the built maximum Wavelike steel webplate concrete beam of China is 120m across footpath.Therefore, the continuous girder bridge span centre section that the appearance of Wavelike steel webplate concrete bridge not yet solves 150-250m continues the problem of downwarp and cracking in webs.
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 top board, base plate adopts concrete material, and web adopts the vertical folding case beam of waveform steel.
Summary of the invention
For solving the problem, the invention provides a kind of beam bridge of avoiding and causing span centre section to continue longitudinal composite continuous beam system of the concrete beam-Wavelike steel webplate concrete beam of downwarp and cracking because span increases.
The technical solution adopted for the present invention to solve the technical problems is: longitudinal composite continuous beam system of concrete beam-Wavelike steel webplate concrete beam, comprise and be located at concrete beam section on bridge pier and the Wavelike steel webplate concrete beam section being located at beam body span centre section and end bay Duan Bingyu concrete beam section and being fixedly connected with, concrete beam section length is that continuous beam main span is across 1/4 ~ 1/2 of footpath.
Be further used as the improvement of technical solution of the present invention, concrete beam section and Wavelike steel webplate concrete beam section are provided with transition bonding section at the place of being interconnected.
Be further used as the improvement of technical solution of the present invention, in transition bonding section, the steel web of waveform steel web concrete beam section stretches in the web of concrete beam section, and being provided with diaphragm in the side near concrete beam section, the inner side of transition bonding Duan Gang web is provided with concrete lining.
Be further used as the improvement of technical solution of the present invention, concrete beam section is provided with the first top board prestressing tendon along beam body longitudinal direction in top board, is provided with the web prestressing tendon longitudinal and curved under two ends along beam body in web.
Be further used as the improvement of technical solution of the present invention, Wavelike steel webplate concrete beam section is respectively equipped with the second top board prestressing tendon along beam body longitudinal direction and baseboard prestress bundle in top board and base plate, is longitudinally also provided with diaphragm in some being spaced in Wavelike steel webplate concrete beam section along beam body.
Be further used as the improvement of technical solution of the present invention, the external pre-stress bundle along beam body longitudinal direction is provided with in concrete beam section and Wavelike steel webplate concrete beam section, this external pre-stress bundle is arranged in parallel to diaphragm along top board lower edge and is descending the curved base plate upper limb to Wavelike steel webplate concrete beam section span centre section gradually through after diaphragm in concrete beam section, and the upside of diaphragm is provided with the steering block of some change external pre-stress bundles trend in the below of top board.
Be further used as the improvement of technical solution of the present invention, in transition bonding section, the steel web of waveform steel web concrete beam section stretches into the length >=2m in concrete beam section web.
Be further used as the improvement of technical solution of the present invention, the two ends of web prestressing tendon are equipped with mooring anchor, mooring anchor comprise be located at web anchor in web and be located on described diaphragm every beam anchor.
Beneficial effect of the present invention: in the present invention, concrete beam section and Wavelike steel webplate concrete beam section longitudinally link together and form continuous beam system.The concrete beam section of wherein conducting oneself with dignity larger is located on the bridge pier below beam body, and the less Wavelike steel webplate concrete beam section of deadweight is positioned at span centre and the end bay section of beam body, by longitudinal mixing, overcome the respective shortcoming of concrete beam or Wavelike steel webplate concrete beam unitary system, while ensure that whole system stiffness, the span centre section that causes continues downwarp and cracking because span increases to avoid beam bridge.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the invention will be further described:
Fig. 1 is the overall structure schematic diagram of the embodiment of the present invention;
Fig. 2 is the prestressing tendon arrangement schematic diagram of the embodiment of the present invention;
Fig. 3 is the Wavelike steel webplate concrete beam section structure schematic diagram of the embodiment of the present invention;
Fig. 4 is the concrete beam section structure schematic diagram of the embodiment of the present invention;
Fig. 5 is the transition bonding section vertical section structure schematic diagram of the embodiment of the present invention;
Fig. 6 is the transition bonding section cross-sectional structure schematic diagram of the embodiment of the present invention;
Fig. 7 is the transition bonding section profile of the embodiment of the present invention.
Detailed description of the invention
In 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 top board, base plate adopts concrete material, and web adopts the vertical folding case beam of waveform steel.
With reference to Fig. 1-Fig. 7, the invention provides longitudinal composite continuous beam system of a kind of concrete beam-Wavelike steel webplate concrete beam, comprise and be located at concrete beam section 2 on bridge pier 1 and the Wavelike steel webplate concrete beam section 3 being located at beam body span centre section and end bay Duan Bingyu concrete beam section 2 and being fixedly connected with, the length of concrete beam section 2 is that continuous beam main span is across 1/4 ~ 1/2 of footpath.
As the preferred embodiment of the present invention, concrete beam section 2 and Wavelike steel webplate concrete beam section 3 are provided with transition bonding section 4 at the place of being interconnected.
In the present invention, concrete beam section 2 and Wavelike steel webplate concrete beam section 3 link together longitudinally through transition bonding section 4 and form continuous beam system.The concrete beam section 2 of wherein conducting oneself with dignity larger is located on the bridge pier 1 below beam body, length is that continuous beam main span is across 1/4 ~ 1/2 of footpath, ensure that the rigidity of whole system, and the less Wavelike steel webplate concrete beam section 3 of deadweight is positioned at span centre and the end bay section of beam body, length is that continuous beam main span is across 1/2 ~ 3/4 of footpath, Wavelike steel webplate concrete beam section 3, as the agent structure of whole continuous beam system span centre section and end bay section, avoids beam bridge span centre section and continues downwarp and cracking.By longitudinal mixing, overcome the respective shortcoming of concrete beam or Wavelike steel webplate concrete beam unitary system, and accomplish that good looking appearance, cost are reasonable, easy construction, the beam bridge for large span provides desirable bridge type.
As the preferred embodiment of the present invention, in transition bonding section 4, the steel web 31 of waveform steel web concrete beam section 3 stretches in the web 21 of concrete beam section 2, and built-in length >=2m, transition bonding section 4 is provided with diaphragm 41 in the side near concrete beam section 2, transition bonding section 4 is provided with concrete lining 42 in the inner side of steel web 31, through transition adapter section 4 transition connect after, the deck-molding of longitudinal 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 for realizing the stressed transition between web 21 and steel web 31, connection between concrete lining 42 and steel web 31 adopts peg to connect.
As the preferred embodiment of the present invention, concrete beam section 2 is provided with the first top board prestressing tendon 22 along beam body longitudinal direction in top board 5, the web prestressing tendon 23 longitudinal and curved under two ends along beam body is provided with in web 21, wherein the first top board prestressing tendon 22 is for bending resistance, and web prestressing tendon 23 is for shearing resistance.
As the preferred embodiment of the present invention, Wavelike steel webplate concrete beam section 3 is respectively equipped with the second top board prestressing tendon 32 along beam body longitudinal direction and baseboard prestress bundle 33 in top board 5 and base plate 6, for bending resistance.Longitudinally diaphragm 34 in some being spaced also is provided with along beam body in Wavelike steel webplate concrete beam section 3, middle diaphragm 34 is to increase the torsional rigidity of beam body, the determination of middle diaphragm 34 maximum spacing, to make under the Under Eccentric Loading of worst track, the amount of deflection difference of each steel web 31 of same cross section place is as the criterion within 15%.Together with middle diaphragm 34 is cast in top board 5, base plate 6, and peg is adopted to link together between steel web 31.
As the preferred embodiment of the present invention, the external pre-stress bundle 7 along beam body longitudinal direction is provided with in concrete beam section 2 and Wavelike steel webplate concrete beam section 3, for shearing resistance and bending resistance, this external pre-stress bundle 7 is arranged in parallel to diaphragm 41 along top board 5 lower edge and is descending curved base plate 6 upper limb to Wavelike steel webplate concrete beam section 3 span centre section gradually through after diaphragm 41 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 trend in the below of top board 5.
As the preferred embodiment of the present invention, the two ends of web prestressing tendon 23 are equipped with mooring anchor, mooring anchor comprise be located at web anchor in web 21 24 and be located on 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.
The concrete of longitudinal composite continuous beam system of concrete beam-Wavelike steel webplate concrete beam should adopt label to be C50 and above high-strength concrete; Corrugated sheet steel should adopt the steel of more than Q345 rank, preferably adopts weathering steel; First top board prestressing tendon 22, 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 without prejudice to spirit of the present invention, and these equivalent modification or replacement are all included in the application's claim limited range.
Claims (8)
1. longitudinal composite continuous beam system of concrete beam-Wavelike steel webplate concrete beam, it is characterized in that: comprise and be located at concrete beam section (2) on bridge pier (1) and the Wavelike steel webplate concrete beam section (3) being located at concrete beam section (2) described in beam body span centre section and end bay Duan Bingyu and being fixedly connected with, the length of described concrete beam section (2) is that continuous beam main span is across 1/4 ~ 1/2 of footpath.
2. longitudinal 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) and Wavelike steel webplate concrete beam section (3) are provided with transition bonding section (4) at the place of being interconnected.
3. longitudinal composite continuous beam system of concrete beam according to claim 2-Wavelike steel webplate concrete beam, it is characterized in that: in described transition bonding section (4), the steel web (31) of waveform steel web concrete beam section (3) stretches in the web (21) of concrete beam section (2), and being provided with diaphragm (41) in the side near concrete beam section (2), described transition bonding section (4) is provided with concrete lining (42) in the inner side of steel web (31).
4. longitudinal 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 the first top board prestressing tendon (22) along beam body longitudinal direction in top board (5), in web (21), be provided with the web prestressing tendon (23) longitudinal and curved under two ends along beam body.
5. longitudinal 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 the second top board prestressing tendon (32) along beam body longitudinal direction and baseboard prestress bundle (33) in top board (5) and base plate (6), in described Wavelike steel webplate concrete beam section (3), is longitudinally also provided with diaphragm (34) in some being spaced along beam body.
6. longitudinal composite continuous beam system of concrete beam according to claim 3-Wavelike steel webplate concrete beam, it is characterized in that: in described concrete beam section (2) and Wavelike steel webplate concrete beam section (3), be provided with the external pre-stress bundle (7) along beam body longitudinal direction, this external pre-stress bundle (7) is arranged in parallel to described diaphragm (41) along top board (5) lower edge and is descending curved base plate (6) upper limb to Wavelike steel webplate concrete beam section (3) span centre section gradually through after described diaphragm (41) in concrete beam section (2), the upside of described diaphragm (41) is provided with the steering block (71) that some change external pre-stress bundles (7) are moved towards in the below of top board (5).
7. longitudinal composite continuous beam system of the concrete beam according to claim 3,4,5 or 6-Wavelike steel webplate concrete beam, is characterized in that: in described transition bonding section (4), the steel web (31) of waveform steel web concrete beam section (3) stretches into the length >=2m in concrete beam section (2) web (21).
8. longitudinal 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 the web anchor (24) that is located in web (21) and be located on described diaphragm (41) every beam anchor (43).
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| CN201310102511.XA CN103161122B (en) | 2013-03-27 | 2013-03-27 | Longitudinal mixed continuous beam system with concrete beams and corrugated steel web concrete beams |
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| CN201310102511.XA CN103161122B (en) | 2013-03-27 | 2013-03-27 | Longitudinal mixed continuous beam system with concrete beams and corrugated steel web concrete beams |
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| CN103161122B true CN103161122B (en) | 2015-05-27 |
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| CN103556565B (en) * | 2013-11-25 | 2016-08-17 | 湖南大学 | A kind of connecting structure of different performance beams of concrete |
| CN105155400A (en) * | 2015-08-11 | 2015-12-16 | 招商局重庆交通科研设计院有限公司 | Concrete beam-corrugated steel web beam combined continuous beam bridge |
| CN105951575B (en) * | 2016-06-20 | 2019-01-22 | 深圳市市政设计研究院有限公司 | A kind of Wavelike steel webplate beam bridge promoting whole cracking resistance |
| CN106400666A (en) * | 2016-09-12 | 2017-02-15 | 东南大学 | Prestressed concrete-corrugated web steel box connecting beam hybrid beam structural system |
| CN109112946B (en) * | 2018-06-20 | 2021-03-09 | 广西交通科学研究院有限公司 | Construction method of steel truss-corrugated steel web large-span combined beam bridge |
| CN111676795B (en) * | 2020-06-29 | 2021-12-21 | 中铁二院工程集团有限责任公司 | Steel-concrete mixed combined continuous rigid frame bridge |
| CN115821713B (en) * | 2023-02-22 | 2023-05-12 | 湖南大学 | Prestressed UHPC combined structure continuous box girder bridge containing corrugated steel web and construction method thereof |
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