CN107476180B - Discharge steel-concrete composite continuous bridge of bridge guidance tape tensile stress - Google Patents

Discharge steel-concrete composite continuous bridge of bridge guidance tape tensile stress Download PDF

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Publication number
CN107476180B
CN107476180B CN201710677635.9A CN201710677635A CN107476180B CN 107476180 B CN107476180 B CN 107476180B CN 201710677635 A CN201710677635 A CN 201710677635A CN 107476180 B CN107476180 B CN 107476180B
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China
Prior art keywords
guidance tape
bridge
concrete
steel
bridge guidance
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Expired - Fee Related
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CN201710677635.9A
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CN107476180A (en
Inventor
周志祥
邓国军
乔心格
邵帅
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Chongqing Jiaotong University
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Chongqing Jiaotong University
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    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01DCONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D1/00Bridges in general
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01DCONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D19/00Structural or constructional details of bridges

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Bridges Or Land Bridges (AREA)

Abstract

The invention discloses a kind of steel-concrete composite continuous bridges for discharging bridge guidance tape tensile stress, including girder steel and the concrete bridge guidance tape being fixed on girder steel, the setting above the intermediate pier for corresponding to continuous bridge of concrete bridge guidance tape extends transversely through breaking joint, and make between concrete bridge guidance tape and girder steel this extend transversely through breaking joint two sides partial section have it is opposite can longitudinal extension deformation;The unloading of tensile stress caused by high hogging moment is transferred to girder steel by the present invention, is avoided concrete bridge guidance tape tension, is optimized the stress of entire steel-concrete composite beams, can play the performance advantage of steel and concrete;The vertical load of bridge guidance tape is directly passed to girder steel, and ensure that bridge guidance tape will not occur abnormal vertical deformation, and bridge guidance tape is effectively relieved and neutralizes fatigue problem from the stress collection for being fixed to the boundary connection partial zones separated with girder steel, greatly simplify bridge road plate structure and construction technology, improve the stress performance of bridge entirety, to extend its service life, construction and maintenance cost are reduced.

Description

Discharge steel-concrete composite continuous bridge of bridge guidance tape tensile stress
Technical field
The invention belongs to science of bridge building apparatus field, in particular to a kind of steel for discharging bridge guidance tape tensile stress-concrete combination connects Continuous beam bridge.
Background technique
Steel-concrete composite continuous beam has driving smooth, and service performance is good, with material economy, is convenient for batch production, standard Change the number of advantages such as construction.The common form of construction work of existing steel-concrete composite continuous beam be installation girder steel on bridge pier just Position, hoisting prefabricated concrete bridge guidance tape is in place on girder steel, and cast-in-place combination concrete forms steel-concrete composite beam bridge, then by opening Deformed bar is drawn to apply compressive pre-stress to negative moment area concrete bridge guidance tape.
" the steel-concrete composite beams bridge and its build that the continuous prefabricated-pushing tow in segment is coupled afterwards in place that the present inventor applies early period Make method " (application number of invention patent: 201611148449.8), more conventional assembled steel-concrete composite beam bridge construction avoids The trouble of Over-size transport lifting and cast-in-place combination concrete construction, but have how to overcome negative moment area bridge road board concrete Because the effect of shrinkage and creep, vehicle and temperature load leads to the problem of excessive tensile stress.Normal practice is to form steel-concrete combination After beam bridge, compressive pre-stress is applied to negative moment area concrete bridge guidance tape by prestressed reinforcement of tensioning.It must so undergo Preserved pipeline in bridge guidance tape penetrates prestressed strand, and stretch-draw prestressing force beam is implemented to anchor to tonnage is set, to deformed bar, Be in the milk to prestress pipe, last part pours a series of cumbersome techniques such as sealing off and covering anchorage concrete, the construction of bridge guidance tape because This becomes sufficiently complex, and engineering practice shows in hyperstatic steel-concrete composite continuous beam, to negative moment area coagulation The effect that native bridge guidance tape locally applies prestressing force crack is avoided to generate is usually difficult up to desired level.
Therefore, it is necessary to being improved in existing steel-concrete composite continuous bridge structure, can give full play to steel and The strength advantage of concrete avoids concrete in tension cracking disease, simplifies bridge road plate structure and construction technology, it is whole to improve bridge Stress performance reduce construction and maintenance cost to extend its service life.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of steel-concrete composite continuous bridge for discharging bridge guidance tape tensile stress, energy The strength advantage for enough giving full play to steel and concrete avoids concrete in tension cracking disease, simplifies bridge road plate structure and apply Work technique, improves the stress performance of bridge entirety, to extend its service life, reduces construction and maintenance cost.
Steel-concrete composite continuous bridge of release bridge guidance tape tensile stress of the invention, including girder steel and is fixed on girder steel Concrete bridge guidance tape, concrete bridge guidance tape setting above the intermediate pier for corresponding to continuous bridge extend transversely through breaking joint, and the road Shi Tongqiao Between plate and girder steel this extend transversely through breaking joint two sides partial section have it is opposite can longitudinal extension deformation.
Further, the concrete bridge guidance tape is the plank frame of lower bands longitudinal direction floor, longitudinal floor of the concrete bridge guidance tape Two sides respectively by being fixedly installed vertical steel plate, it is described extend transversely through breaking joint be located at continuous bridge intermediate pier top and pass through Wear the concrete bridge guidance tape cross section including vertical steel plate;High negative moment area in intermediate pier two sides, the concrete bridge guidance tape are logical Cross the upper flange that vertical steel plate is connected to girder steel by I vertical spacing of connection bolt, the connection bolt I and vertical steel plate or/and There is longitudinal surplus, so that can longitudinal extension deformation with opposite between concrete bridge guidance tape and girder steel between the upper flange of girder steel; Span centre section in addition to the high negative moment area except intermediate pier two sides, the concrete bridge guidance tape are fixedly welded on by vertical steel plate The upper flange of girder steel.
Further, from can longitudinal extension deformation jointing be transitioned into the partial section of section be welded and fixed, the concrete Connection is fastened and fixed by high-strength connection bolt II between the vertical steel plate of bridge guidance tape and the upper flange of girder steel.
Further, can longitudinal extension deformation jointing and from can longitudinal extension deformation jointing be transitioned into welding The partial section of fixing section, the vertical steel plate strip have the lower flange extended laterally outward to form L-shaped structure, the road Tong Qiao It is connected by lower flange by I vertical spacing of connection bolt between plate and the upper flange of girder steel;From can longitudinal extension deformation connection Section is transitioned into the partial section that section is welded and fixed, and the vertical steel plate of the concrete bridge guidance tape passes through the upper limb of lower flange and girder steel Connection is fastened and fixed by high-strength connection bolt II between plate.
Further, the upper flange of the lower flange of the vertical steel plate or/and girder steel is with the bolt hole for connecting the cooperation of bolt I Longitudinal strip-shaped hole, so that having more than longitudinal direction between connection bolt I and the vertical lower flange of steel plate or/and the upper flange of girder steel Amount.
Further, the vertical steel plate passes through the vertical side of the pre-buried longitudinal floor for being fixed on concrete bridge guidance tape of WELDING STUDS.
Further, from can longitudinal extension deformation jointing be transitioned into the partial section of section be welded and fixed, the company Connecting bolt II longitudinally arranged at least two.
The beneficial effects of the present invention are: the steel of release bridge guidance tape tensile stress of the invention-concrete composite continuous bridge construction, The free extension for extending transversely through breaking joint and partial section being allowed to have opposite girder steel is arranged in bridge guidance tape above continuous bridge intermediate pier, Tensile stress caused by high hogging moment is subjected to unloading by the concrete bridge guidance tape of steel-concrete composite beams and is transferred to girder steel, avoids mixing Solidifying soil bridge guidance tape tension, optimizes the stress of entire steel-concrete composite beams, the performance that can play steel and concrete is excellent Gesture;Concrete bridge guidance tape and girder steel from be fixed to can the transition partial section that deforms of longitudinal extension, pass through setting fastening bolt Bridge guidance tape can be effectively relieved and neutralize fatigue problem from the stress collection for being fixed to the boundary connection partial zones separated with girder steel;To height Negative moment area connects bolt by setting vertical spacing and strip-shaped hole, the vertical load of bridge guidance tape are directly passed to girder steel, both Free extension of the bridge guidance tape with respect to girder steel longitudinal direction is met, also ensures that bridge guidance tape will not occur abnormal vertical deformation, greatly simplifies The road Liao Qiao plate structure and construction technology improve the stress performance of bridge entirety, to extend its service life, and can be substantially reduced Its construction cost.
Detailed description of the invention
The invention will be further described with reference to the accompanying drawings and examples.
Fig. 1 is the structural diagram of the present invention;
Fig. 2 is enlarged drawing at Figure 1A;
Fig. 3 is Figure 1B-B to diagrammatic cross-section;
Fig. 4 is Fig. 1 C-C to diagrammatic cross-section.
Specific embodiment
Fig. 1 is the structural diagram of the present invention, and Fig. 2 is enlarged drawing at Figure 1A, and Fig. 3 is Figure 1B-B to diagrammatic cross-section, Fig. 4 It is Fig. 1 C-C to diagrammatic cross-section, as shown in the figure: steel-concrete composite continuous bridge of the release bridge guidance tape tensile stress of the present embodiment, Including girder steel 2 and the concrete bridge guidance tape 1 being fixed on girder steel 2, the concrete bridge guidance tape 1 is on the intermediate pier 3 for corresponding to continuous bridge Side's setting extends transversely through breaking joint 11, and makes to extend transversely through 11 two sides of breaking joint (along bridge at this between concrete bridge guidance tape 1 and girder steel 2 Longitudinal two sides) partial section have it is opposite can longitudinal extension deformation, i.e., vertical between the section concrete bridge guidance tape 1 and girder steel 2 It can slide in a certain range upwards, by tensile stress caused by high hogging moment by the concrete bridge guidance tape of steel-concrete composite beams It carries out unloading and is transferred to girder steel, avoid concrete bridge guidance tape tension, optimize the stress of entire steel-concrete composite beams, Neng Goufa Wave the performance advantage of steel and concrete;Intermediate pier refers to bridge in centre portion of the bridge other than end bay bridge pier Pier, the beam section on intermediate pier are negative moment area;Prefabricated 1 later period of concrete bridge guidance tape is located in girder steel 2 and connects, in the road Tong Qiao Plate position corresponding with intermediate pier, which is opened, extends transversely through breaking joint, so that the concrete bridge guidance tape of the high negative moment area of intermediate pier pier top is not held Be directly transferred to girder steel by pulling force, and by pulling force, from distribution wave steel bear pulling force this advantage, guarantee entire bridge by Power state.The transversal cross-section of entire concrete bridge guidance tape should be run through through slot, including concrete bridge guidance tape is arranged to be fixed on girder steel Steel plate, the steel plate can be located at concrete bridge guidance tape bottommost, can also be located at concrete bridge guidance tape web two sides.
In the present embodiment, the concrete bridge guidance tape 1 is the plank frame of lower bands longitudinal direction floor 12, and cross section is T-shaped;It is described 12 two sides of longitudinal floor of concrete bridge guidance tape 1 are respectively by being fixedly installed vertical steel plate 8, as shown, the two of longitudinal floor 12 A transverse side is provided with vertical steel plate, belongs to symmetrical structure, is arranged to be connected to girder steel, details are not described herein;It is described Extend transversely through breaking joint 11 be located at continuous bridge intermediate pier 3 top and through the cross of concrete bridge guidance tape 1 including vertical steel plate 8 including Section;High negative moment area in 3 two sides of intermediate pier, the concrete bridge guidance tape 1 are vertically limited by vertical steel plate 8 by connection bolt I 6 Position is connected to the upper flange 21 of girder steel 2, i.e., the described girder steel 2 is I-beam, and the concrete bridge guidance tape 1 is located at the upper flange of I-beam 2 21 upper surfaces have longitudinal surplus, so that concrete between the connection bolt I 6 and vertical steel plate or/and the upper flange 21 of girder steel 2 It can longitudinal extension deformation with opposite between bridge guidance tape and girder steel;In addition to the high negative moment area of 3 two sides of intermediate pier Span centre section, the concrete bridge guidance tape 1 are fixedly welded on the upper flange 21 of girder steel 2 by vertical steel plate 8.
The vertical steel plate 8 generally by WELDING STUDS or pre-buried the realizations fixation of other shear connectors, it is described extend transversely through it is disconnected Seam 11 is located at high negative moment area, and high negative moment area is located in negative moment area a, belongs to negative moment area and acted on by hogging moment Biggish partial section, high negative moment area refers to that concrete receives the effect of the tensile stress that the hogging moment produces may Cracking, and in addition to remaining section of high negative moment area in negative moment area, concrete bridge guidance tape is being born produced by hogging moment Pulling force when be unlikely to crack, detection acquisition can be carried out according to different bridges in engineering practice;High hogging moment area section concrete structure It makes and bears pulling force greatly and concentrate the most, open extend transversely through breaking joint conducive to concrete bridge guidance tape pulling force is eliminated from source herein;It is negative in height Span centre section other than moment of flexure section, it is described including the negative moment area and sagging moment section b other than high negative moment area Concrete bridge guidance tape 1 is fixed on girder steel 1 (the general fixed form using welding) by vertical steel plate 8;Certainly, it is incited somebody to action in connection bolt I 6 Vertical spacing connects between concrete bridge guidance tape 1 and girder steel 2, and connection side should not have loosening upwards (upper and lower);This structure is bearing to bear During moment of flexure, breaking joint 11 is extended transversely through since concrete bridge guidance tape 1 has, girder steel 2 can occur when bearing and shifting the hogging moment come Deformation, then can generate longitudinally opposite displacement between concrete bridge guidance tape 1, and there is the connection bolt I 6 of longitudinal surplus to adapt to the longitudinal direction Displacement is further conducive to play material load advantage to guarantee defining for stress.
In the present embodiment, (between concrete bridge guidance tape 1 and girder steel 2) from can longitudinal extension deformation jointing be transitioned into welding The partial section of fixing section passes through high-strength connection bolt between the vertical steel plate of the concrete bridge guidance tape and the upper flange of girder steel II is fastened and fixed connection.For the connection type of aforementioned connection bolt I, be conducive to preferable transfer pulling force, and in addition to height bear it is curved Other than square section span centre section (including other than high negative moment area negative moment area and sagging moment section a) due to concrete Connecting structure between bridge guidance tape 1 and girder steel 2 is conducive to pulling force and pressure caused by the section, then is then that welding is solid in the section Fixed connection (concrete bridge guidance tape is directly welded on girder steel by general use by the shearing steel plate of bottom), therefore, having longitudinally to stretch Compression deformation jointing, which is transitioned into, to be welded and fixed the partial section of section and then mutates, and is easy to generate stress collection and is neutralized fatigue, It is this to be mutated the optimization for being unfavorable for the whole stress of bridge;Connection bolt II 7 is fastened and fixed connection and refers to connection bolt II and the surpluses of all directions is not present, directly by being fastenedly connected;It is welded since the bonding strength of connection bolt II 7 is generally less than It connects, but due to there is no activity surplus, then forms intensity and be higher than being fixedly connected for connection bolt I 6;By can produce straight skidding to Connection bolt II is fastened and fixed arrives welding structure again, and the gentle variation of intensity avoids being mutated conducive to the load transition of entire bridge Caused stress collection neutralizes the destruction that fatigue is formed.
In the present embodiment, can longitudinal extension deformation jointing (the high negative moment area in intermediate pier two sides) and from Can longitudinal extension deformation jointing be transitioned into the partial section that section is welded and fixed, the vertical steel plate 8 is with laterally outward The lower flange 5 of extension forms L-shaped structure, by lower flange 5 by connecting between the concrete bridge guidance tape 1 and the upper flange 21 of girder steel 2 The connection of I 6 vertical spacing of bolt;From can longitudinal extension deformation jointing be transitioned into the partial section of section be welded and fixed, institute The vertical steel plate for stating concrete bridge guidance tape is solid by being fastened between lower flange 5 and the upper flange 21 of girder steel by high-strength connection bolt II 7 Fixed connection;As shown, lower flange 5 can be integrally formed in negative moment area a and shearing steel plate 8, the welding in later period can also be passed through It is formed;It is in 90 ° of angles between lower flange 5 and shearing steel plate 8, is similar to steel angle structure.
In the present embodiment, the lower flange 5 of the vertical steel plate or/and the upper flange 21 of girder steel 2 cooperate with bolt I 6 is connect Bolt hole be longitudinal strip-shaped hole be strip-shaped hole, in the present embodiment, lower flange 5 and the bolt hole 51 for connecting bolt I 6 and cooperating Bolt hole for strip-shaped hole, and girder steel 2 can not be strip-shaped hole, be easy to in-situ precast processing.So that connection bolt I and vertical steel plate Lower flange or/and girder steel upper flange between there is longitudinal surplus.
In the present embodiment, the vertical steel plate 8 passes through the perpendicular of the pre-buried longitudinal floor 11 for being fixed on concrete bridge guidance tape 1 of WELDING STUDS It is respectively provided with to the side of side, left and right two, details are not described herein.
In the present embodiment, from can longitudinal extension deformation jointing be transitioned into the partial section of section be welded and fixed, institute State connection bolt II longitudinally arranged at least two;Further alleviate the mutation between positive hogging moment transition region, reduces moment of flexure and produced Raw pressure mutation, guarantees good stress;It connects bolt II and generally uses high-strength bolt, to guarantee that connection is strong Degree;In actual use, connection bolt I 6 is longitudinally arranged multiple;It certainly, can also (sagging moment section b) be close to negative in span centre region The regional area of moment of flexure section a is fastened and fixed by connecting bolt II, can also realize the purpose of the present invention.
Finally, it is stated that the above examples are only used to illustrate the technical scheme of the present invention and are not limiting, although referring to compared with Good embodiment describes the invention in detail, those skilled in the art should understand that, it can be to skill of the invention Art scheme is modified or replaced equivalently, and without departing from the objective and range of technical solution of the present invention, should all be covered at this In the scope of the claims of invention.

Claims (5)

1. a kind of steel-concrete composite continuous bridge for discharging bridge guidance tape tensile stress, it is characterised in that: including girder steel and be fixed on girder steel On concrete bridge guidance tape, concrete bridge guidance tape setting above the intermediate pier for corresponding to continuous bridge extends transversely through breaking joint, and makes concrete Between bridge guidance tape and girder steel this extend transversely through breaking joint two sides partial section have it is opposite can longitudinal extension deformation;
The concrete bridge guidance tape is the plank frame of lower bands longitudinal direction floor, and longitudinal floor two sides of the concrete bridge guidance tape pass through respectively Be fixedly installed vertical steel plate, it is described extend transversely through breaking joint be located at continuous bridge intermediate pier top and through including vertical steel Concrete bridge guidance tape cross section including plate;High negative moment area in intermediate pier two sides, the concrete bridge guidance tape by vertical steel plate by Connection I vertical spacing of bolt is connected to the upper flange of girder steel, the upper flange of the connection bolt I and vertical steel plate or/and girder steel Between there is longitudinal surplus so that can longitudinal extension deformation with opposite between concrete bridge guidance tape and girder steel;Removing intermediate pier two Span centre section other than the high negative moment area of side, the concrete bridge guidance tape are fixedly welded on the upper limb of girder steel by vertical steel plate Plate;
From can longitudinal extension deformation jointing be transitioned into the partial section of section be welded and fixed, the concrete bridge guidance tape it is vertical Connection is fastened and fixed by high-strength connection bolt II between steel plate and the upper flange of girder steel.
2. steel-concrete composite continuous bridge of release bridge guidance tape tensile stress according to claim 1, it is characterised in that: can Longitudinal extension deformation jointing and from can longitudinal extension deformation jointing be transitioned into the partial section of section be welded and fixed, The vertical steel plate strip has the lower flange extended laterally outward to form L-shaped structure, the upper flange of the concrete bridge guidance tape and girder steel it Between by lower flange by I vertical spacing of connection bolt connect;From can longitudinal extension deformation jointing be transitioned into and be welded and fixed The vertical steel plate of the partial section of section, the concrete bridge guidance tape passes through between lower flange and the upper flange of girder steel by high-strength connection Bolt II is fastened and fixed connection.
3. steel-concrete composite continuous bridge of release bridge guidance tape tensile stress according to claim 2, it is characterised in that: described Vertically the upper flange of the lower flange of steel plate or/and girder steel is longitudinal strip-shaped hole with the bolt hole for connecting the cooperation of bolt I, so that even There is longitudinal surplus between connecting bolt I and the vertical lower flange of steel plate or/and the upper flange of girder steel.
4. steel-concrete composite continuous bridge of release bridge guidance tape tensile stress according to claim 1, it is characterised in that: described Vertical steel plate passes through the vertical side of the pre-buried longitudinal floor for being fixed on concrete bridge guidance tape of WELDING STUDS.
5. it is according to claim 3 release bridge guidance tape tensile stress steel-concrete composite continuous bridge, it is characterised in that: from Can longitudinal extension deformation jointing be transitioned into the partial section that section is welded and fixed, the connection bolt II is longitudinally arranged extremely It is two few.
CN201710677635.9A 2017-08-09 2017-08-09 Discharge steel-concrete composite continuous bridge of bridge guidance tape tensile stress Expired - Fee Related CN107476180B (en)

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* Cited by examiner, † Cited by third party
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CN107938493A (en) * 2017-12-28 2018-04-20 贵州大学 A kind of novel fabricated combination beam
CN108643449A (en) * 2018-04-18 2018-10-12 浙江交通职业技术学院 A kind of detachably prefabricated assembled Steel-concrete Combined Beam Structures and manufacture craft
CN115125835B (en) * 2022-06-22 2023-06-27 保利长大工程有限公司 Prefabricated bridge deck structure of steel plate composite beam

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EP0350139A2 (en) * 1983-11-07 1990-01-10 Harumoto Iron Works Co., Ltd. A method for forming a composite structural member
JPH11222817A (en) * 1998-02-06 1999-08-17 Nippon Steel Corp Continuous composite bridge
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CN202626842U (en) * 2012-06-13 2012-12-26 中交通力建设股份有限公司 Reinforced structure used for exerting prestressing force on highway bridge floor layer
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