CN201972237U - Section prefabricated rectangular steel pipe concrete truss - Google Patents

Section prefabricated rectangular steel pipe concrete truss Download PDF

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Publication number
CN201972237U
CN201972237U CN2011200536203U CN201120053620U CN201972237U CN 201972237 U CN201972237 U CN 201972237U CN 2011200536203 U CN2011200536203 U CN 2011200536203U CN 201120053620 U CN201120053620 U CN 201120053620U CN 201972237 U CN201972237 U CN 201972237U
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China
Prior art keywords
chord
rectangular steel
concrete
truss
steel tube
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CN2011200536203U
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Chinese (zh)
Inventor
周绪红
刘永健
石宇
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长安大学
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Priority to CN2011200536203U priority Critical patent/CN201972237U/en
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Publication of CN201972237U publication Critical patent/CN201972237U/en

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Abstract

The utility model relates to a section prefabricated rectangular steel pipe concrete truss, comprising an upper chord, a lower chord, a vertical rod and an inclined web rod which are linear type thin-wall rectangular steel pipes, wherein a concrete structure is filled in the upper chord or/and the lower chord; and the upper chord, the lower chord, the vertical rod and the inclined web rod are welded together. As the sections of the rod pieces of the rectangular steel pipe concrete truss are rectangular, the treatment of a bridge floor structure after a girder is built is easier. In the section prefabricated rectangular steel pipe concrete truss, a bridge floor plate can be directly placed on the rectangular section truss, and the more stable effect can be obtained, so that the connecting structure with the bridge floor plate is reduced, and the section prefabricated rectangular steel pipe concrete truss is more economic.

Description

A kind of precast segment Concrete-Filled Rectangular Steel Tube Truss
Technical field
The utility model relates to the utility model and relates to industry and civilian construction, bridge construction and technical field of construction, particularly relates to a kind of precast segment Concrete-Filled Rectangular Steel Tube Truss in building such as bridge that is applicable to.
Background technology
Truss: plane that generally has triangular element or the space structures formed by straight-bar.Under load action, truss member mainly bears axial tension or pressure, thereby can make full use of the intensity of material, comparable solid web girder is saved material when span is big, alleviate deadweight and increase rigidity, so be applicable to load-carrying members and tall and slender structure, as roof truss, bridge, power transmission line column, satellite launching tower, hydraulic gate, gantry etc. than large span.
The major advantage of prefabricated subsection on-site consolidation construction technology: (1) beam body can be realized standardized designs and construction at factory's prefabricate, and quality is good, and risk is little; The superstructure geometry linear is controlled easily; (2) construction of superstructure precast segment and substructure can be carried out simultaneously, and speed of application is fast, has shortened the construction period; (3) mechanization of building operation degree height is particularly suitable for the rapid construction of long-span bridge; (4) little to natural ecological environment destruction around the bridge site, little to existing traffic under the bridge and the influence of peripheral community environment.
Precast segment: it is one of job practices of present bridge superstructure that precast segment is installed.Be primarily aimed at prestressed concrete box girder, steel case beam and steel truss beam, segmented elder generation is prefabricated with girder, hangs assembly at the scene.
The utility model content
Technical problem to be solved in the utility model is to provide a kind of precast segment Concrete-Filled Rectangular Steel Tube Truss at the deficiencies in the prior art.Adopt following technical scheme:
A kind of precast segment Concrete-Filled Rectangular Steel Tube Truss, comprise upper chord, lower chord, montant and diagonal web member, upper chord, lower chord, montant and diagonal web member are the linear pattern light-walled rectangular pipe, wherein, or/and the inside fill concrete structure of lower chord, upper chord, lower chord, montant and diagonal web member weld together at upper chord.
Described precast segment Concrete-Filled Rectangular Steel Tube Truss, the inner prestressed reinforcement of tensioning of described lower chord.
Described precast segment Concrete-Filled Rectangular Steel Tube Truss, the cross section minimum dimension of described linear pattern light-walled rectangular pipe are more than or equal to 100mm, and wall thickness is more than or equal to 4mm, and the depth-width ratio in cross section is smaller or equal to 2.
Described precast segment Concrete-Filled Rectangular Steel Tube Truss, weld stud on the inwall of described linear pattern light-walled rectangular pipe.
Described precast segment Concrete-Filled Rectangular Steel Tube Truss is provided with longitudinal stiffener on the inwall of described linear pattern light-walled rectangular pipe.
The advantage of Concrete-Filled Rectangular Steel Tube Truss: (1) Concrete-Filled Rectangular Steel Tube Truss joint form is simple, surfacing, is convenient to connect.Compare with the circular cross-section encased structures, the friendship transversal between the encased structures member of square-section in a plane, be convenient to process and member between connection.In trussed construction, the advantage of square-section encased structures aspect node embodies more fully.(2) Concrete-Filled Rectangular Steel Tube Truss member section moment of inertia is big, stability good.Compare with circular cross-section concrete filled steel tube compressed member, the moment of inertia in concrete-filled rectangular steel tube compressed member cross section is relatively large, its stability is good, therefore, for the middle long member that is subjected to stability control, square-section concrete filled steel tube compressed member is better than circular cross-section concrete filled steel tube compressed member.(3) help the construction of bridge deck.Because the bar cross section of Concrete-Filled Rectangular Steel Tube Truss is a rectangle, becoming in the processing of bridge deck structure after girder builds up like this is more prone to.Bridge deck directly can be placed on the truss of square-section, just can obtain more stable effect, thus the joint construction of minimizing and bridge deck, and more economical.
Description of drawings
Fig. 1 is a precast segment Concrete-Filled Rectangular Steel Tube Truss structural representation;
Fig. 2 is a precast segment Concrete-Filled Rectangular Steel Tube Truss sectional schematic diagram;
Fig. 3 is a precast segment Concrete-Filled Rectangular Steel Tube Truss sectional schematic diagram.
The specific embodiment
Below in conjunction with specific embodiment, the utility model is elaborated.
The precast segment Concrete-Filled Rectangular Steel Tube Truss, as Fig. 1, shown in 2, comprise upper chord 10, lower chord 20, montant 30 and diagonal web member 40, upper chord 10, lower chord 20, montant 30 and diagonal web member 40 are linear pattern thin-walled rectangle (cross section is a rectangle) steel pipe, wherein, at upper chord 10 or/and lower chord 20 (can be separately at one of upper chord 10 or lower chord 20 fill concrete, also can all fill simultaneously) inside fill concrete structure 50, upper chord 10, lower chord 20, montant 30 and diagonal web member 40 weld together, form the truss sections, the truss sections is coupled together in the mode of welding or connector form whole truss then.
As shown in Figure 3, preferred, concrete filled steel tube can be combined with the advantage of prestressing technique, form pre-stressed steel pipe concrete combined member or structure, can expand its range of application.For example can adopt the loading scheme of pre-tensioning system, pre-tensioning system is exactly a pretensioning prestressed reinforcement 201, and then the method for concreting, after treating that concrete meets the requirements of intensity, cut off or loosen prestressed reinforcement, rely on the adhesion stress between prestressed reinforcement and the concrete on every side to transmit prestressing force.Adopt the drag-line method to apply prestressing force, flexible cable is anchored on the node in the structural system, produce prestressing force in inside configuration by the stretch-draw cable wire.The method of stretch-draw cable wire has jack tension method, jack pushing top process etc.Will symmetrical in batches stretch-draw during stretch-draw, to prevent unstability outside the truss plane.
Preferably, the structure of Concrete-Filled Rectangular Steel Tube Truss satisfies following the requirement:
1. the cross section minimum dimension of the rectangular steel pipe that adopted of upper chord 10, lower chord 20, montant 30 and diagonal web member 40 (being minimum dimension in the width of cross section or the height) is more than or equal to 100mm, the rectangular steel pipe wall thickness is more than or equal to 4mm, and the depth-width ratio in cross section is smaller or equal to 2.When the maximum limit of concrete-filled rectangular steel tube member section size is not less than 800mm, should takes on the rectangular steel pipe inwall weld stud or construction measure such as longitudinal stiffener is set.
2. the flakiness ratio of upper chord 10, the lower chord 20 steel pipe tube wall that adopts B is the plate width; T is a panel thickness; f yBe the yield strength of steel, the chord member thickness of steel pipe should not be less than the web member thickness of steel pipe.
3. the flakiness ratio of web member steel pipe should not greater than Also should not less than
4. the angle between center line of the bar should not be less than 30 °.
5. node (position of chord member and web member handing-over is called node) locate big web member width should be greater than 1.5 times of the width of less web member.
6. the width of web member and chord member should be in following scope: T, Y type node (T, Y and N, the K type etc. fixed according to the shape of node location place rod member, just definition conforms to corresponding letter) 0.25≤β≤1.0, K type node or N type node 0.35≤β≤1.0 than β.
Application prospect:
Concrete-Filled Rectangular Steel Tube Truss is utilized the compression member of the good pressurized performance of concrete as truss, utilizes the tension member of steel pipe as truss itself, can give full play to the performance of steel pipe, concrete material, now its application prospect in bridge is summarized as follows:
(1) continuous girder bridge
Continuous girder bridge is good with its structure tension performance, distortion is little, the shrinkage joint is few, driving is smooth-going, handsome in appearance, maintenance is easy etc. and become one of most competitive main bridge type.In the actual engineering, girder generally adopts prestressed reinforced concrete construction, and box-type section has also obtained application widely owing to have bigger bending resistance torsional rigidity.Characteristics and advantage in conjunction with rectangular steel pipe are applied to Concrete-Filled Rectangular Steel Tube Truss in the continuous girder bridge, are fully feasible, mainly have following characteristics: 1. can alleviate the girder deadweight.The continuous girder bridge girder generally adopts prestressed reinforced concrete construction, and its deadweight is bigger, has limited further developing of bridge span.If adopt the Concrete-Filled Rectangular Steel Tube Truss girder, can effectively alleviate deadweight, reduce the girder section size, help the increase of bridge span.2. can make things convenient for main girder construction.Adopt the construction technology of precast segment, on-site consolidation to avoid the in-site pouring concrete to bring the control of steel pipe concrete filled difficult quality, working procedure increase, the slow shortcoming of speed of application, realized that batch production is prefabricated, accelerating construction progress is saved the duration, reduces cost; 3. help the construction of bridge deck.Because the bar cross section of Concrete-Filled Rectangular Steel Tube Truss is a rectangle, becoming in the processing of bridge deck structure after girder builds up like this is more prone to.Bridge deck directly can be placed on the truss of square-section, just can obtain more stable effect, thus the joint construction of minimizing and bridge deck, and more economical.
(2) application in the suspension bridge
Ratio in large span bridge scheme is chosen, and particularly when striding the footpath when km is above, suspension bridge often has overwhelming superiority.But along with striding advancing of footpath, its stiff girder focus on certainly ratio shared in the structure total load increase very fast, therefore in the large span suspension bridge, the closed cross-section that stiff girder all adopts steel case beam or plane steel truss to form.Although adopt steel case its bending resistance of beam and torsional rigidity big, wind resistance, moulding is succinctly slim and graceful, has problems such as steel using amount is big, cost of materials and processing charges height, piece spare is heavy, the assembly unit difficulty is big.And adopt the trussed construction on the plane of forming by shaped steel, although can utilize diagonal brace or transverse truss on the cross section at a certain distance strengthens, to improve the globality of its torsional rigidity and structure, also help transmitting the bridge floor load, but the torsional rigidity and the wind resisting stability of its direction across bridge bending resistance, cross section are still not good enough, and the joint structure complexity, steel using amount is also more.
In fact the main supporting member of suspension bridge is funicular system rather than stiff girder, but as an important component part of structure collectivity, can not ignore the beam action of putting more energy into, the requirement that must make it satisfy driving function and resist transverse wind and seismic forces.Simultaneously must provide torsional rigidity, to satisfy the aerodynamic stability requirement.Certainly necessary vertical bending rigidity also needs, be beneficial to mobile load suitable bridge to distribution.If adopt the stiff girder of Concrete-Filled Rectangular Steel Tube Truss girder structure, will have the following advantages: 1. help the stressed of girder as suspension bridge.Though girder of suspension bridge is not main supporting member, it is a kind of gauge structure of striding greatly, and the wind resistance antidetonation of girder just seems even more important.Adopt the Concrete-Filled Rectangular Steel Tube Truss girder, because it is conducted oneself with dignity greater than steel truss, this wind resistance seismic stability for bridge is favourable.In addition, the steel using amount of girder will greatly reduce, and satisfy under the prerequisite of main beam stress, can reduce construction costs effectively, reach a technical economic benefit preferably.2. help the stressed of king-tower.With respect to the steel concrete king-tower, the Concrete-Filled Rectangular Steel Tube Truss king-tower can also bear the moment of flexure effect that may exist in the king-tower preferably except the compressive load that can bear main push-towing rope and transmit.In addition, it can also reduce deadweight effectively, also will reduce greatly the basis and the requirement of ground.3. in self-anchored suspension bridge, girder also is subjected to coming from the bigger horizontal component of main push-towing rope except being subjected to the moment of flexure from deadweight and vehicular load, and this component will produce bigger pressure effect to main push-towing rope.The Concrete-Filled Rectangular Steel Tube Truss beam just in time has good axial compression resistance performance.
Should be understood that, for those of ordinary skills, can be improved according to the above description or conversion, and all these improvement and conversion all should belong to the protection domain of the utility model claims.

Claims (5)

1. precast segment Concrete-Filled Rectangular Steel Tube Truss, it is characterized in that, comprise upper chord, lower chord, montant and diagonal web member, upper chord, lower chord, montant and diagonal web member are the linear pattern light-walled rectangular pipe, wherein, or/and the inside fill concrete structure of lower chord, upper chord, lower chord, montant and diagonal web member weld together at upper chord.
2. precast segment Concrete-Filled Rectangular Steel Tube Truss according to claim 1 is characterized in that, the inner prestressed reinforcement of tensioning of described lower chord.
3. precast segment Concrete-Filled Rectangular Steel Tube Truss according to claim 1 is characterized in that, the cross section minimum dimension of described linear pattern light-walled rectangular pipe is more than or equal to 100mm, and wall thickness is more than or equal to 4mm, and the depth-width ratio in cross section is smaller or equal to 2.
4. precast segment Concrete-Filled Rectangular Steel Tube Truss according to claim 1 is characterized in that, weld stud on the inwall of described linear pattern light-walled rectangular pipe.
5. precast segment Concrete-Filled Rectangular Steel Tube Truss according to claim 1 is characterized in that, on the inwall of described linear pattern light-walled rectangular pipe longitudinal stiffener is set.
CN2011200536203U 2011-03-03 2011-03-03 Section prefabricated rectangular steel pipe concrete truss CN201972237U (en)

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Application Number Priority Date Filing Date Title
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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103726612A (en) * 2014-01-23 2014-04-16 长安大学 PBL stiffening rectangular steel tube concrete space truss
CN104088221A (en) * 2014-07-31 2014-10-08 长安大学 T-shaped plate girder segment prefabricating unit based on steel truss and combined bridge deck slab
CN104110098A (en) * 2014-07-29 2014-10-22 中交一公局第四工程有限公司 Prestressed concrete-filled steel tube truss piece and truss built by truss pieces
CN104818668A (en) * 2015-04-22 2015-08-05 甘肃省交通规划勘察设计院有限责任公司 Combined truss type bridge-road transition section structure integrated with bridge abutment
CN104992739A (en) * 2015-06-17 2015-10-21 严瑾 Containment unit, containment and construction method of containment
CN110670801A (en) * 2019-08-30 2020-01-10 贵州大学 Hollow truss structure
CN111622348A (en) * 2020-06-09 2020-09-04 江苏海洋大学 Prestressed self-resetting concrete truss structure and assembling method

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103726612A (en) * 2014-01-23 2014-04-16 长安大学 PBL stiffening rectangular steel tube concrete space truss
CN104110098A (en) * 2014-07-29 2014-10-22 中交一公局第四工程有限公司 Prestressed concrete-filled steel tube truss piece and truss built by truss pieces
CN104088221A (en) * 2014-07-31 2014-10-08 长安大学 T-shaped plate girder segment prefabricating unit based on steel truss and combined bridge deck slab
CN104088221B (en) * 2014-07-31 2015-11-25 长安大学 A kind of T-shaped plate girder precast segment unit based on steel truss and combined bridge deck
CN104818668A (en) * 2015-04-22 2015-08-05 甘肃省交通规划勘察设计院有限责任公司 Combined truss type bridge-road transition section structure integrated with bridge abutment
CN104992739A (en) * 2015-06-17 2015-10-21 严瑾 Containment unit, containment and construction method of containment
CN110670801A (en) * 2019-08-30 2020-01-10 贵州大学 Hollow truss structure
CN111622348A (en) * 2020-06-09 2020-09-04 江苏海洋大学 Prestressed self-resetting concrete truss structure and assembling method

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CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20110914

Termination date: 20120303

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