CN104032668A - Half-through steel truss-concrete combined continuous steel bridge - Google Patents

Half-through steel truss-concrete combined continuous steel bridge Download PDF

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Publication number
CN104032668A
CN104032668A CN201410263628.0A CN201410263628A CN104032668A CN 104032668 A CN104032668 A CN 104032668A CN 201410263628 A CN201410263628 A CN 201410263628A CN 104032668 A CN104032668 A CN 104032668A
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chord
bridge
concrete
steel
guidance tape
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CN104032668B (en
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周志祥
范亮
高燕梅
李成君
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Chongqing Jiaotong University
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Chongqing Jiaotong University
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Abstract

The invention discloses a half-through steel truss-concrete combined continuous steel bridge. The steel bridge comprises a main truss beam which consists of steel truss beams, wherein an upper chord, a middle chord and a lower chord are respectively arranged on each steel truss beam; a steel box-concrete combined structure formed by concrete bridge road plates is formed between the middle chords. The concrete bridge road plate is arranged at the position of the middle chord, the upper chord of the main beam in the hogging moment section of the top of a continuous steel bridge pier is pulled, the lower chord is compressed, and the concrete bridge road plate is basically positioned in the compressed section; the middle chord of the main beam in the sagging moment section of the continuous steel bridge and the combined structure with the concrete bridge road plate are the specific compressed section, the lower chord is the specific pulled section, and the problem of the cracking caused by the pulling of the concrete bridge road plate; the upper structure of the bridge is constructed in an assembly manner, the construction period is shortened, each construction link and the quality are easy to control, the stressing of the bridge is clear, and the construction is safe and fast.

Description

Half-through steel purlin-Combined concrete continuous steel frame bridge
Technical field
The invention belongs to bridge engineering field, particularly a kind of half-through steel purlin-Combined concrete continuous steel frame bridge.
Background technology
Continuous rigid frame bridge grows up in the firm structure of T shape and two kinds of bridge construction technical foundation of continuous beam, all belong to beam bridge system, its configuration is simple, V-arrangement river valley is had to good compliance, its girder is flexural member, main beam is continuous, beam pier is fixed, both jointless, the smooth-going advantage of driving a vehicle in continuous beam total length had been kept, keep again T-shaped rigid frame bridge not establish bearing, do not need the advantage of converting system, be convenient to cantilever construction, there is larger bending resistance and torsional rigidity, can meet the force request of large span bridge.Integrality performance of the structure is good, shock resistance is strong, pontic brevity and lucidity, has good functional performance.Segmented free cantilever casting or free cantilever erection construction method that continuous rigid frame bridge adopts, require lowlyer to construction plant, technical maturity, safety are higher, thereby are widely used.
But conventional concrete continuous rigid frame bridge is deposited many shortcomings that is difficult to overcome, and is mainly manifested in: along with the increase of span of bridge, girder deadweight enlarges markedly, and has greatly limited concrete continuous rigid frame bridge to the possibility of Large Span Bridges development more, construction period is long, construction link is many, the long bundle of concrete material unstable properties and bending prestressing force construction deviation is difficult to avoid, cause later concrete contraction, creep and loss of prestress be difficult to hold, easily make design ideal state and the Cheng Qiaohou virtual condition of bridge have obvious deviation, thereby produce structural cracks and the disease such as Long-term Deflection is excessive, for addressing the above problem, application number is that the Chinese patent application of 200910104675.X discloses a kind of steel purlin-concrete combined continuous rigid frame bridge, this bridge substructure is identical with ordinary concrete continuous rigid frame bridge form, superstructure is the steel-concrete combined structure being combined by Steel Truss Beam and prefabricated bridge guidance tape, and apply appropriate prestressing force in good time by stages, give full play to the material advantage of steel and concrete, girder deadweight is significantly reduced with respect to conventional prestressed concrete beam, substructure size and bearing capacity of foundation soil require corresponding reduction, can be applicable to the construction of large span continuous rigid frame bridge, but its pier top section concrete bridge guidance tape still exists crack in tension problem, and post-tensioned prestressing bundle must be set in bridge guidance tape, to overcome crack in tension problem, the complexity of structure and the difficulty of construction are increased thus.Published steel purlin-concrete combined continuous rigid frame bridge belongs to car for deck bridge, is applicable to constructionheightofbridge without the strict condition limiting.
Chinese patent ZL201210024341.3 discloses a kind of Through Steel purlin-Combined concrete continuous steel frame bridge, the combining structure that adopts Steel Truss Beam and concrete bridge guidance tape to combine, concrete bridge guidance tape is between the lower chord of steel purlin, can realize easily the connection of prefabricated bridge guidance tape and steel purlin lower chord by cast-in-situ concrete, its structure can be brought into play the tension advantage of steel and the resistance to compression advantage of concrete at pier top section, because main beam concrete all adopts prefabricated bridge guidance tape, the disease hidden danger being caused by concrete shrinkage and creep is reduced, be applicable to the situation high to under-clearance requirement.But still there is crack in tension problem in its span centre section concrete bridge guidance tape, must in jackshaft guidance tape, post-tensioned prestressing bundle be set, to overcome crack in tension problem, increase thus the complexity of structure and the difficulty of construction; Another its more than bridge guidance tape building height is large, to a certain extent also limit value its scope of application.
Therefore, need to further improve bridge construction, more can give full play to all advantages of steel purlin-concrete combined continuous rigid frame bridge with respect to prior art, give full play to the mutual coordinative role of steel purlin-concrete, further simplified structure structure and construction technology, easy to control the quality, make structure stress more rationally clear and definite.
Summary of the invention
In view of this, the object of this invention is to provide a kind of half-through steel purlin-Combined concrete continuous steel frame bridge, more can give full play to all advantages of steel purlin-concrete combined continuous rigid frame bridge with respect to prior art, give full play to the mutual coordinative role of steel purlin-concrete, further simplified structure structure and construction technology, easy to control the quality, make structure stress more rationally clear and definite.
Half-through steel purlin-Combined concrete continuous steel frame bridge of the present invention, comprises main truss beam, and described main truss beam is made up of the Steel Truss Beam of at least two Pin parallel longitudinal settings, and Steel Truss Beam is equipped with upper chord, middle chord member and lower chord;
Between upper chord and middle chord member and between middle chord member and lower chord, connect by web member separately respectively, the concrete bridge guidance tape that is connected between the middle chord member of adjacent steel girder truss forms steel case-concrete combined structure, and this concrete bridge guidance tape is cast-in-place shaping concrete bridge guidance tape or the cast-in-place concrete prefabricated bridge guidance tape that is connected.
Further, described upper chord is reduced to longitudinal both sides gradually by bridge pier, and extends in the beam section that main truss joist support is subject to positive bending moment and be reduced to middle chord member and be fixedly connected with middle chord member;
Further, between the upper chord of adjacent steel girder truss, correspondence is provided with top bracing, middle lateral and bottom lateral bracing between middle chord member and between lower chord;
Further, described upper chord, middle chord member and lower chord are hollow-core construction; Described main truss joist support is subject to hogging moment beam section upper chord and the lower chord inside of bearing positive bending moment beam section that longitudinal prestressing steel bundle is set; Bear the interior concrete perfusion of lower chord of hogging moment beam section;
Further, the side that middle chord member and concrete bridge guidance tape connect arranges WELDING STUDS along overall length of bridge;
Further, the upper horizontal bridge reinforcing bar both ends downward bending of building in concrete bridge guidance tape, lower upwards bending of horizontal bridge reinforcing bar both ends, the upwards bending part at the downward bending portion at upper horizontal bridge reinforcing bar both ends and lower horizontal bridge reinforcing bar both ends forms staggered up and down structure;
Further, lay precast concrete bridge guidance tape between the middle chord member of adjacent steel girder truss, the longitudinal seam cast-in-situ concrete of precast concrete bridge guidance tape transverse ends and middle chord member side steel plate is connected;
Further, precast concrete bridge guidance tape is stretched out and to external part subordinate bending in upper horizontal bridge reinforcing bar both ends in precast concrete bridge guidance tape, precast concrete bridge guidance tape is stretched out at lower horizontal bridge reinforcing bar both ends and to stretching out bending on end, the upwards bending part at the downward bending portion at upper horizontal bridge reinforcing bar both ends and lower horizontal bridge reinforcing bar both ends forms staggered up and down structure;
Further, the transverse joint concrete between cast in situs precast concrete bridge guidance tape, builds deck paving of concrete;
Further, form the oblique support of lateral cross between adjacent steel girder truss, these oblique support two ends are fixed on corresponding middle chord member and lower chord.
The invention has the beneficial effects as follows: half-through steel purlin-Combined concrete continuous steel frame bridge of the present invention, steel purlin by middle chord member, lower chord and between web member form the equal altitudes standard steel purlin of arranging along full-bridge length, the upper chord of pier top section, middle chord member and between web member be formed in the steel purlin structure of partial section And of Varying Depth on standard steel purlin, concrete bridge guidance tape is located at middle chord member place, the upper chord tension of this continuous rigid frame bridge pier top negative moment area girder, lower chord (interior concrete perfusion) pressurized, concrete bridge guidance tape is positioned at pressure zone substantially; The middle chord member of the positive bending moment section girder of continuous rigid frame bridge and with concrete bridge road board combining structure be clear and definite pressure zone, lower chord is clear and definite tensile region, has fundamentally avoided the problem of concrete bridge guidance tape crack in tension; Bridge guidance tape all can cast in situs, but preferably adopt precast concrete plank, can obviously reduce concrete shrinkage and creep and draw the adverse effect to bridge construction.Compared with existing PC continuous rigid frame bridge, both the tension advantage of steel and the resistance to compression advantage of concrete had been given full play to, and the two is coordinated mutually, and avoid concrete crack in tension and shrinkage and creep to cause the disease hidden danger that Long-term Deflection is excessive, make the long-term structural performance of bridge more reliable; Can significantly reduce again the deadweight of main beam structure, make bridge pier and foundation structure size and to the corresponding reduction of ground requirement for bearing capacity, be conducive to the development of large span continuous rigid frame bridge; Bridge superstructure adopts prefabricated construction, avoid conventional prestressed concrete continuous rigid frame bridge to need large-tonnage cantilever to hang a series of bulky equipment and the complicated technology such as the long bundle installation of frame shuttering, reinforcing bar binding, Cast-in-place concrete, bending long prestressing force and stretch-draw anchor under the varying environment of blue, thousands of times, reduction of erection time, each construction link and quality are all easy to control, bridge force-bearing is clear and definite, and construction safety is quick.
Brief description of the drawings
Below in conjunction with drawings and Examples, the invention will be further described.
Fig. 1 is bridge construction schematic diagram of the present invention;
Fig. 2 is that Fig. 1 is along A-A to sectional view;
Fig. 3 is Fig. 2 C place enlarged drawing;
Fig. 4 is that Fig. 1 is along B-B to sectional view.
Detailed description of the invention
Fig. 1 is bridge construction schematic diagram of the present invention, Fig. 2 is that Fig. 1 is along A-A to sectional view, Fig. 3 is Fig. 2 C place enlarged drawing, Fig. 4 is that Fig. 1 is along B-B to sectional view, as shown in the figure, half-through steel purlin-Combined concrete continuous steel frame bridge of the present embodiment, comprises main truss beam, described main truss beam is made up of the Steel Truss Beam of at least two Pin parallel longitudinal settings, and Steel Truss Beam is equipped with upper chord 1, middle chord member 2 and lower chord 3;
Between upper chord 1 and middle chord member 2 and between middle chord member 2 and lower chord 3, connect by web member separately respectively, the concrete bridge guidance tape 9 that is connected between the middle chord member 2 of adjacent steel girder truss forms steel case-concrete combined structure, and this concrete bridge guidance tape 9 is cast-in-place shaping concrete bridge guidance tape or the cast-in-place concrete prefabricated bridge guidance tape that is connected.
In the present embodiment, described upper chord 1 is reduced to longitudinal both sides gradually by bridge pier, and extends in the beam section that main truss joist support is subject to positive bending moment and be reduced to middle chord member and be fixedly connected with middle chord member; Meet the stress curve of upper chord 1, and be fixedly connected with middle chord member 2 entering positive bending moment region, form smooth pulling force, the compressive stress that in the counteracting positive bending moment region of major part, chord member and bridge floor bear; Said structure make middle chord member, lower chord and between web member form the equal altitudes standard steel purlin of arranging along full-bridge length, the upper chord of pier top section, middle chord member and between web member be formed in the steel purlin structure of partial section And of Varying Depth on standard steel purlin, overall appearance smoothness, stressed effect is good.
In the present embodiment, correspondence is provided with top bracing 7, middle lateral 8 and bottom lateral bracing 9, the i.e. lateral ties of level between the upper chord of adjacent steel girder truss, between middle chord member and between lower chord; Lateral ties refer between upper chord 1, between middle chord member 2 and the transverse connection structure being fixedly connected with between lower chord 3, to ensure the stable syndeton between Steel Truss Beam; Top bracing 7, middle lateral 8 and bottom lateral bracing 10 and montant 5, brace 4 can and upper chord 1, middle chord member 2 and lower chord 3 between adopt welding to form girder, also can adopt other syndetons, do not repeat them here;
In the present embodiment, described upper chord 1, middle chord member 2 and lower chord 3 are hollow-core construction; Described main truss joist support is subject to hogging moment beam section upper chord 1 and lower chord 3 inside of bearing positive bending moment beam section that longitudinal prestressing steel bundle is set; Bear the interior concrete perfusion of lower chord 3 of hogging moment beam section; Steel Truss Beam be subject in tension chord, according to stressing conditions, prestressed strand is set, in compression boom concrete perfusion to improve its resistance to compression supporting capacity, thereby improve overall stress-bearing capability; As the middle chord member of laying concrete bridge guidance tape, owing to there is upper chord and lower chord, force-bearing situation is good, does not need to process through strengthening; Certainly, also can according to strengthen need to be in the middle chord member in span centre region concrete perfusion, increase its intensity, particularly to large more practical across the bridge in footpath; Thereby effectively reduce the weight of main truss beam and even whole bridge; Upper chord 1, middle chord member 2 and lower chord 3 complement each other, and jointly bear suffered load, and tension and compression distribute rationally and load distributes adapts with structure, thereby, can improve Steel Truss Beam and bear the ability of moment of flexure.
In the present embodiment, middle chord member 2 arranges WELDING STUDS 13 with the side that concrete bridge guidance tape 9 connects along overall length of bridge, forms shear connector, is beneficial to the bonding strength that improves concrete bridge guidance tape, further improves globality and the uniformity of steel case-concrete combined structure.
In the present embodiment, the upper horizontal bridge reinforcing bar both ends downward bending of building in concrete bridge guidance tape 9, lower upwards bending of horizontal bridge reinforcing bar both ends, the upwards bending part at the downward bending portion at upper horizontal bridge reinforcing bar both ends and lower horizontal bridge reinforcing bar both ends forms staggered up and down structure; As shown in the figure, staggered structure forms up and down straight hook and WELDING STUDS have staggered in the horizontal, there is certain hook and pull effect, greatly increase the bonding strength between concrete bridge guidance tape 9 and middle chord member 8, and due to the interaction between upper and lower cross structure and WELDING STUDS, increase and being connected between concrete bridge guidance tape and middle chord member there is certain anti-deformation intensity; Globality and the uniformity of bridge are ensured.
In the present embodiment, lay precast concrete bridge guidance tape between the middle chord member 2 of adjacent steel girder truss, the longitudinal seam cast-in-situ concrete of precast concrete bridge guidance tape transverse ends and middle chord member side steel plate is connected; Adopt precast concrete bridge road plated construction, can obviously reduce concrete shrinkage and creep and draw the adverse effect to bridge construction; Adopt prefabricated construction, avoid conventional prestressed concrete continuous rigid frame bridge to need large-tonnage cantilever to hang a series of bulky equipment and the complicated technology such as the long bundle installation of frame shuttering, reinforcing bar binding, Cast-in-place concrete, bending long prestressing force and stretch-draw anchor under the varying environment of blue, thousands of times, reduction of erection time, each construction link and quality are all easy to control, bridge force-bearing is clear and definite, and construction safety is quick; Prestressed concrete bridge guidance tape is hollow prefabricated bridge guidance tape, lightweight and comparatively firm.
In the present embodiment, precast concrete bridge guidance tape is stretched out and to external part subordinate bending in upper horizontal bridge reinforcing bar 14 both ends in precast concrete bridge guidance tape, precast concrete bridge guidance tape is stretched out at lower horizontal bridge reinforcing bar 6 both ends and to stretching out bending on end, the upwards bending part at the downward bending portion at upper horizontal bridge reinforcing bar 14 both ends and lower horizontal bridge reinforcing bar 6 both ends forms staggered up and down structure; Said structure is prefabricated shaping, easy to use.
In the present embodiment, the transverse joint concrete between cast in situs precast concrete bridge guidance tape, builds deck paving of concrete 11; Form complete bridge floor, concrete bridge guidance tape 9 connects the overall bridge deck structure of formation, and bridge floor is positioned at girder middle part, can make bridge floor height moderate.
In the present embodiment, form the oblique support 12 of lateral cross between adjacent steel girder truss, these oblique support 12 two ends are fixed on corresponding middle chord member 2 and lower chord 3; Oblique support 12 forms scissor chi structure, and jointly forms triangular support structure with lateral, significantly improves support strength.
Above-mentioned bridge construction process, comprises the following steps:
A. complete bridge foundation and Bridge Pier and Abutment Construction;
B. complete the construction of steel truss girder installation in position; Under bridge, have ready conditions when temporary rest pier is set, should adopt incremental launching method to complete the construction of steel truss girder installation in position; While unconditionally temporary rest pier being set under bridge, should adopting in bridge pier both sides and complete the construction of full-bridge steel truss girder installation in position along spanning direction successively symmetrical free cantilever erection steel truss girder sections
C. complete in the section upper chord of pier top by designing requirement in good time in batches and span centre section lower chord in prestressed strand construction, and the concrete perfusion construction of (as required in span centre section in chord member) in the section lower chord of pier top
D. by designing requirement complete in good time in batches prefabricated bridge guidance tape between adjacent middle chord member installation, build the concrete of transverse joint, build the longitudinal connection seam concrete between middle chord member and prefabricated bridge guidance tape.
E. build deck paving of concrete, complete other ancillary facility constructions of bridge.
Finally explanation is, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although the present invention is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can modify or be equal to replacement technical scheme of the present invention, and not departing from aim and the scope of technical solution of the present invention, it all should be encompassed in the middle of claim scope of the present invention.

Claims (10)

1. half-through steel purlin-Combined concrete continuous steel frame bridge, is characterized in that: comprise main truss beam, described main truss beam is made up of the Steel Truss Beam of at least two Pin parallel longitudinal settings, and Steel Truss Beam is equipped with upper chord, middle chord member and lower chord;
Between upper chord and middle chord member and between middle chord member and lower chord, connect by web member separately respectively, the concrete bridge guidance tape that is connected between the middle chord member of adjacent steel girder truss forms steel case-concrete combined structure, and this concrete bridge guidance tape is cast-in-place shaping concrete bridge guidance tape or the cast-in-place concrete prefabricated bridge guidance tape that is connected.
2. half-through steel purlin-Combined concrete continuous steel frame bridge according to claim 1, it is characterized in that: described upper chord is reduced to longitudinal both sides gradually by bridge pier, and extend in the beam section that main truss joist support is subject to positive bending moment and be reduced to middle chord member and be fixedly connected with middle chord member.
3. half-through steel purlin-Combined concrete continuous steel frame bridge according to claim 2, is characterized in that: correspondence is provided with top bracing, middle lateral and bottom lateral bracing between the upper chord of adjacent steel girder truss, between middle chord member and between lower chord.
4. half-through steel purlin-Combined concrete continuous steel frame bridge according to claim 2, is characterized in that: described upper chord, middle chord member and lower chord are hollow-core construction; Described main truss joist support is subject to hogging moment beam section upper chord and the lower chord inside of bearing positive bending moment beam section that longitudinal prestressing steel bundle is set; Bear the interior concrete perfusion of lower chord of hogging moment beam section.
5. half-through steel purlin-Combined concrete continuous steel frame bridge according to claim 1, is characterized in that: the side that middle chord member and concrete bridge guidance tape connect arranges WELDING STUDS along overall length of bridge.
6. half-through steel purlin-Combined concrete continuous steel frame bridge according to claim 5, it is characterized in that: the upper horizontal bridge reinforcing bar both ends downward bending of building in concrete bridge guidance tape, lower upwards bending of horizontal bridge reinforcing bar both ends, the upwards bending part at the downward bending portion at upper horizontal bridge reinforcing bar both ends and lower horizontal bridge reinforcing bar both ends forms staggered up and down structure.
7. half-through steel purlin-Combined concrete continuous steel frame bridge according to claim 5, it is characterized in that: between the middle chord member of adjacent steel girder truss, lay precast concrete bridge guidance tape, the longitudinal seam cast-in-situ concrete of precast concrete bridge guidance tape transverse ends and middle chord member side steel plate is connected.
8. half-through steel purlin-Combined concrete continuous steel frame bridge according to claim 7, it is characterized in that: precast concrete bridge guidance tape is stretched out and to external part subordinate bending in the upper horizontal bridge reinforcing bar both ends in precast concrete bridge guidance tape, precast concrete bridge guidance tape is stretched out at lower horizontal bridge reinforcing bar both ends and to stretching out bending on end, the upwards bending part at the downward bending portion at upper horizontal bridge reinforcing bar both ends and lower horizontal bridge reinforcing bar both ends forms staggered up and down structure.
9. half-through steel purlin-Combined concrete continuous steel frame bridge according to claim 8, is characterized in that: the transverse joint concrete between cast in situs precast concrete bridge guidance tape, build deck paving of concrete.
10. half-through steel purlin-Combined concrete continuous steel frame bridge according to claim 3, is characterized in that: between adjacent steel girder truss, form the oblique support of lateral cross, these oblique support two ends are fixed on corresponding middle chord member and lower chord.
CN201410263628.0A 2014-06-13 2014-06-13 Half-through steel purlin-Combined concrete continuous steel frame bridge Active CN104032668B (en)

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Cited By (4)

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Publication number Priority date Publication date Assignee Title
CN105625158A (en) * 2015-05-22 2016-06-01 柏嘉(西安)工程技术研究院有限公司 Optimal force type steel truss-concrete combination continuous rigid frame bridge
CN105780670A (en) * 2014-12-23 2016-07-20 任丘市永基建筑安装工程有限公司 Overall stabilization technology for steel bridge frame
CN107829361A (en) * 2017-09-29 2018-03-23 中铁工程设计咨询集团有限公司 A kind of monolithic uprises purlin and put more energy into composite beam bridge
CN108457166A (en) * 2018-02-09 2018-08-28 重庆三峡学院 A kind of double limitation fixing device of multi-span girder bridge

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CN111035187B (en) * 2019-12-31 2021-04-13 兰剑智能科技股份有限公司 A goods shelves that is used for oblique pull tower of antidetonation goods shelves and includes this oblique pull tower

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CN202688849U (en) * 2012-04-23 2013-01-23 中冶建筑研究总院有限公司 Truss connecting device for FRP (fiber reinforce plastic) truss bridge arching
CN202899016U (en) * 2012-10-23 2013-04-24 湖北华舟重工应急装备股份有限公司 Arched steel truss bridge with slide rails

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KR20010078870A (en) * 2001-05-04 2001-08-22 원대연 Development and construction methods of the prestressed composite truss beams
JP2004027516A (en) * 2002-06-21 2004-01-29 Oriental Construction Co Ltd Composite truss segment and truss bridge for simultaneously using suspension cable by using this truss segment and its construction method
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105780670A (en) * 2014-12-23 2016-07-20 任丘市永基建筑安装工程有限公司 Overall stabilization technology for steel bridge frame
CN105625158A (en) * 2015-05-22 2016-06-01 柏嘉(西安)工程技术研究院有限公司 Optimal force type steel truss-concrete combination continuous rigid frame bridge
CN107829361A (en) * 2017-09-29 2018-03-23 中铁工程设计咨询集团有限公司 A kind of monolithic uprises purlin and put more energy into composite beam bridge
CN108457166A (en) * 2018-02-09 2018-08-28 重庆三峡学院 A kind of double limitation fixing device of multi-span girder bridge

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