CN201411626Y - Corrugated steel web pre-bending composite beam - Google Patents

Corrugated steel web pre-bending composite beam Download PDF

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Publication number
CN201411626Y
CN201411626Y CN2009200399270U CN200920039927U CN201411626Y CN 201411626 Y CN201411626 Y CN 201411626Y CN 2009200399270 U CN2009200399270 U CN 2009200399270U CN 200920039927 U CN200920039927 U CN 200920039927U CN 201411626 Y CN201411626 Y CN 201411626Y
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steel plate
corrugated steel
steel
web
corrugated
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Expired - Fee Related
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CN2009200399270U
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Chinese (zh)
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杨明
黄侨
叶见曙
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Southeast University
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Southeast University
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Abstract

The utility model relates to the composite beam structure of the bridge, in particular to a corrugated steel web pre-bending composite beam, which comprises a first stage concrete, a second stage concrete and a corrugated steel web. The first stage concrete is poured on the periphery of a lower flanged steel plate, the second stage concrete is connected with the upper surface of an upper flanged steel plate or poured on the periphery of the upper flanged steel plate, the corrugated steel web is arranged between the lower flanged steel plate and the upper flanged steel plate, and the upper flanged steel plate, the lower flanged steel plate and the corrugated steel web form an I-shaped beam structure. The corrugated steel web pre-bending composite beam consist of the I-shaped steel beam withthe corrugated steel web and a reinforced concrete plate coated outside the upper flanged plate and the lower flanged plate of the I-shaped steel beam, and can be applied in the urban overpass projects and high-speed railway bridge projects. Due to the low rigidity of the corrugated steel web in the vertical bridge direction, the pre-bending force can not be absorbed when the steel beam is pre-bent, thereby reducing the prestress loss under the effect of structural shrinkage and creep. With the good shear strength of the corrugated steel web, the utility model prevents web cracks and has goodstructural durability.

Description

A kind of corrugated steel ventral shield preflex composite beam
Technical field
The utility model relates to a kind of bridge combined beam structure, relates in particular to a kind of corrugated steel ventral shield preflex composite beam.
Background technology
Pre-bent Combination Beam is a kind of structure of distinct characteristics, is applied to medium and small striding in highway directly and the Simple Supported Railway Bridges in bridge engineering usually, also can be used for continuous girder bridge.Compare with the form of structure that prestress box beam, prestressed T beam etc. are common, its steel using amount is big, the single span cost is higher relatively and construction technology is comparatively complicated; But remarkable advantages such as simultaneously it has also that rigidity is big, span ability strong, good endurance, rise-span ratio are little.Before the 1980s,, be difficult in China as bigger structures of this type of steel using amount such as Pre-bent Combination Beam and be able to extensive employing because China's steel output is less.Thereafter along with the increase of steel output, and the improvement of structure design theory, some steel using amounts are big but structural mechanical property is good, the structure of good endurance (for example encased structures, steel concrete combining structure etc.) also begins to be applied and to develop in China.Pre-bent Combination Beam is as a kind of design feature with distinctness of steel concrete combining structure.Though mechanical property is good, comparing with other traditional structures also has weakness and deficiency.At present, this structure is applied to rise-span ratio restriction the have relatively high expectations structure of (as High-speed Railway Bridges) of strict (as mutilevel overpass) or the rigidity of structure comparatively more.For this class formation, Pre-bent Combination Beam not only can well realize its structure function, also has good and economic.Though Pre-bent Combination Beam has many advantages, in recent years at China's slower development.Research for the Pre-bent Combination Beam structure mainly concentrates in minority colleges and universities and the research institution, and the quantity of practical application is also very limited, far fewer than countries such as Belgium, Germany, Japan and France.Trace it to its cause, can be summed up as following 3 points: single span Pre-bent Combination Beam cost is higher relatively; Construction technology is comparatively complicated; Lack corresponding design, job specfication and standard.
The utility model content
The technical problem that solves:
The utility model provides a kind of corrugated steel ventral shield preflex composite beam, and it is higher relatively to have solved above-mentioned described single span Pre-bent Combination Beam cost; Construction technology is comparatively complicated; Lack corresponding design, job specfication and standard.
The utility model is the technical solution problem by the following technical solutions:
The utility model provides a kind of corrugated steel ventral shield preflex composite beam, comprise the fist stage concrete that is cast in around the steel plate of bottom flange, be cast in around the steel plate of top flange or and be connected by shear connector with the top flange steel plate, second stage concrete, the top flange steel plate, the bottom flange steel plate, also comprise corrugated steel web, corrugated steel web is arranged between bottom flange steel plate and the top flange steel plate, and the three forms the I-beam structure.
Corrugated steel ventral shield preflex composite beam described in the utility model, described second stage concrete is cast on the steel plate of top flange.
Corrugated steel ventral shield preflex composite beam described in the utility model, described second stage concrete are wrapped in around the steel plate of top flange and are connected six end faces.
Corrugated steel ventral shield preflex composite beam described in the utility model, described second stage concrete is connected by the upper surface of shear connector with the top flange steel plate.
Corrugated steel ventral shield preflex composite beam described in the utility model, described top flange steel plate and bottom flange steel plate are provided with shear connector.
A kind of corrugated steel ventral shield preflex composite beam described in the utility model, described I-beam structure are the constant equal altitudes beam of building height.
The firm web Pre-bent Combination Beam of a kind of ripple described in the utility model, described I-beam structure forms degree of uprising beam by changing the corrugated steel web height.
The job practices of a kind of corrugated steel ventral shield preflex composite beam described in the utility model, step is as follows:
1) adopt welding that top flange steel plate, bottom flange steel plate and corrugated steel web are welded into I-beam;
2) several shear connectors of welding on top flange steel plate and bottom flange steel plate;
3) stride path position apart from beam two ends 1/4 at I-beam and apply vertical pre-bending power;
4) at bottom flange steel plate placed around longitudinal reinforcement and stirrup and build fist stage concrete;
5) treat that fist stage concrete reaches prescribed strength after, discharge pre-bending power;
6) at top flange steel plate placed around longitudinal reinforcement and stirrup and build the second phase and mix earth; After treating that second stage concrete reaches prescribed strength, finish ripple steel web Pre-bent Combination Beam and set up.
Beneficial effect
According to such scheme, the utility model provides a kind of corrugated steel ventral shield preflex composite beam, to improve the defective that traditional Pre-bent Combination Beam loss of prestress is big, construction technology is complicated, also can reduce rolled steel dosage simultaneously to a certain extent, reduce structural cost.The outer armored concrete slab of frange plate constitutes the utility model by the worker's shape girder steel that has corrugated steel web with about being wrapped in steel I-beam, can be applicable in city intersection engineering and the High-speed Railway Bridges engineering.Because the vertical bridge of corrugated steel web is very little to rigidity, can not absorb pre-bending power when girder steel pre-bending, also can reduce the loss of prestress of structure under the shrinkage and creep effect, so its prestressing force efficient height; Because therefore corrugated steel web buckling strength height need not in the welding of web place horizontal or longitudinal stiffener when construction, also need not additionally to be provided with direction across bridge and prop up ejection device, so its easy construction, the duration is short; Corrugated steel web adopts steel plate rolling to form, and can be made into the web of uniform section or variable cross-section height easily according to designing requirement; Because this construction pre-stress efficient height, easy construction, its economy also increases.Corrugated steel ventral shield preflex composite beam is done the time spent being subjected to bending load, and moment of flexure is mainly born by the frange plate up and down of steel I-beam and first phase and second stage concrete, and shearing is mainly born by corrugated steel web.The pre-bending power that is added on steel I-beam in advance can be postponed the appearance in beam body crack, helps giving full play to the characteristics of Materials with High Strength.Owing to adopt steel I-beam that structure is applied prestressing force, compare work progresss such as having avoided being provided with prestress pipe, stretch-draw prestressing force steel bundle, anchoring and duct grouting with traditional prestressed reinforced concrete construction simultaneously.And the shear-carrying capacity that corrugated steel web is good has been avoided the web crack, and structure durability is good.
Description of drawings
Fig. 1 structural representation of the present utility model;
Fig. 2 cross-sectional view of the present utility model;
Fig. 3 vertical view of the present utility model;
Fig. 4 structural change diagrammatic sketch of the present utility model;
The structural representation of Fig. 5 concrete listrium of the present utility model
Fig. 6 concrete of the present utility model does not superscribe edge of a wing steel plate schematic diagram;
1 is that corrugated steel web, 2 is that top flange steel plate, 3 is that bottom flange steel plate, 4 is that shear connector, 5 is that fist stage concrete, 6 is that second stage concrete, 7 is that longitudinal reinforcement, 8 is that stirrup, L are the corrugated steel ventral shield preflex composite beam beam length among the figure, and L/4 is corrugated steel ventral shield preflex composite beam 1/4 place.
The specific embodiment
Specifically the utility model is further described below in conjunction with description of drawings:
Embodiment 1: a kind of corrugated steel ventral shield preflex composite beam, comprise the fist stage concrete 5 that is cast in bottom flange steel plate 3, the top flange steel plate 2 that is connected with second stage concrete 6, also comprise corrugated steel web 1, corrugated steel web 1 is arranged between bottom flange steel plate 3 and the top flange steel plate 2, and the three forms the I-beam structure.
A kind of corrugated steel ventral shield preflex composite beam described in the utility model, described second stage concrete 6 is cast on the top flange steel plate 2.
A kind of corrugated steel ventral shield preflex composite beam described in the utility model, described second stage concrete 6 is connected with six end faces of top flange steel plate 2.Connecting six end faces is appreciated that into second stage concrete 6 and superscribes edge of a wing steel plate 2.
In erection process, adopt second stage concrete 6 to superscribe 2 needs of edge of a wing steel plate and make mould earlier with top flange steel plate 2 parcels, building second stage concrete 6 then, treat that second stage concrete 6 is dismountable mould after reaching prescribed strength, increase the bulk strength of ripple steel web Pre-bent Combination Beam like this, but construction technology is comparatively complicated, and construction cost is higher.
A kind of corrugated steel ventral shield preflex composite beam described in the utility model, described top flange steel plate 2 is provided with shear connector 4 with bottom flange steel plate 3.
A kind of corrugated steel ventral shield preflex composite beam described in the utility model, described I-beam structure are the constant equal altitudes beam of building height.
The firm web Pre-bent Combination Beam of a kind of ripple described in the utility model, described I-beam structure forms degree of uprising beam by changing the corrugated steel web height.
The job practices of a kind of corrugated steel ventral shield preflex composite beam described in the utility model, step is as follows:
1) adopt welding that top flange steel plate 2, bottom flange steel plate 3 are welded into I-beam with corrugated steel web 1;
2) several shear connectors 4 of welding on top flange steel plate 2 and bottom flange steel plate 3;
3) stride path position apart from beam two ends 1/4 at I-beam and apply vertical pre-bending power;
4) at bottom flange steel plate 3 placed around longitudinal reinforcements 7 and stirrup 8 and build fist stage concrete 5;
5) treat that fist stage concrete 5 reaches prescribed strength after, discharge pre-bending power;
6) at top flange steel plate 2 placed around longitudinal reinforcements 7 and stirrup 8 and build the second phase and mix earth 6; After treating that second stage concrete 6 reaches prescribed strength, finish ripple steel web Pre-bent Combination Beam and set up.
Corrugated steel web 1 forms by plain plate is rolling; With corrugated steel web and top flange steel plate 2, when bottom flange steel plate 3 is formed I-beams, can select types of attachment such as the two-sided welding of tongue and groove, high-strength bolt for use; Shear connector 4 can be selected peg connector, rebar connector, PBL (perforate steel plate) connector etc. for use; Fist stage concrete 5 should be selected the concrete that is not less than C40 for use, and second stage concrete 6 should select for use label to be not less than the concrete of C30; Longitudinal reinforcement 7 and stirrup 8 are distributing bar, can adopt R235 (I grade reinforcing steel yield strength 235MPa) and HRB335 distributing bars such as (II grade reinforcing steel yield strength 335MPa) reinforcing bar commonly used.The material of corrugated steel web should be selected Q345, Q390 and Q420 steel such as (low-alloy high-strengths) for use; Upper and lower balsh plate can adopt Q345, Q390 and Q420 steel such as (low-alloy high-strengths).
Embodiment 2: a kind of corrugated steel ventral shield preflex composite beam, comprise the fist stage concrete 5 that is cast in bottom flange steel plate 3, the second stage concrete 6 that is connected top flange steel plate 2, comprise that also corrugated steel web 1, corrugated steel web 1 are arranged between fist stage concrete 5 that is cast in bottom flange steel plate 3 and the second stage concrete 6 that is connected top flange steel plate 2, the three forms the I-beam structure.
A kind of corrugated steel ventral shield preflex composite beam described in the utility model, described second stage concrete 6 is cast on the top flange steel plate 2.
A kind of corrugated steel ventral shield preflex composite beam described in the utility model, described top flange steel plate 2 is provided with shear connector 4 with bottom flange steel plate 3.
A kind of corrugated steel ventral shield preflex composite beam described in the utility model, described second stage concrete 6 is connected with top flange steel plate 2 upper surfaces, then adopts second stage concrete 6 not superscribe edge of a wing steel plate 2, only is connected with shear connector 4 on the top flange steel plate 2.
Adopt second stage concrete 6 not superscribe edge of a wing steel plate 2, then need not to make mould, directly pour into a mould second stage concrete in the one side of the shear connector of last a balsh plate 2, the simple cost of construction technology is lower, but the intensity of whole ripple steel web Pre-bent Combination Beam can reduce.
A kind of corrugated steel ventral shield preflex composite beam described in the utility model, described I-beam structure are the constant equal altitudes beam of building height.
The firm web Pre-bent Combination Beam of a kind of ripple described in the utility model, described I-beam structure forms degree of uprising beam by changing the corrugated steel web height.
The construction method step of a kind of corrugated steel ventral shield preflex composite beam described in the utility model is as follows:
1) adopt welding that top flange steel plate 2, bottom flange steel plate 3 are welded into I-beam with corrugated steel web 1;
2) several shear connectors 4 of welding on top flange steel plate 2 and bottom flange steel plate 3;
3) stride path position apart from beam two ends 1/4 at I-beam and apply vertical pre-bending power;
4) at bottom flange steel plate 3 placed around longitudinal reinforcements 7 and stirrup 8 and build fist stage concrete 5;
5) treat that fist stage concrete 5 reaches prescribed strength after, discharge pre-bending power;
6) at top flange steel plate 2 placed around longitudinal reinforcements 7 and stirrup 8 and build the second phase and mix earth 6; After treating that second stage concrete 6 reaches prescribed strength, finish ripple steel web Pre-bent Combination Beam and set up.
Corrugated steel web 1 forms by plain plate is rolling; With corrugated steel web and top flange steel plate 2, when bottom flange steel plate 3 is formed I-beams, can select types of attachment such as the two-sided welding of tongue and groove, high-strength bolt for use; Shear connector 4 can be selected peg connector, rebar connector, PBL (perforate steel plate) connector etc. for use; Fist stage concrete 5 should be selected the concrete that is not less than C40 for use, and second stage concrete 6 should select for use label to be not less than the concrete of C30; Longitudinal reinforcement 7 and stirrup 8 are distributing bar, can adopt R235 (I grade reinforcing steel yield strength 235MPa) and HRB335 distributing bars such as (II grade reinforcing steel yield strength 335MPa) reinforcing bar commonly used.The material of corrugated steel web should be selected Q345, Q390 and Q420 steel such as (low-alloy high-strengths) for use; Upper and lower balsh plate can adopt Q345, Q390 and Q420 steel such as (low-alloy high-strengths).

Claims (7)

1, a kind of corrugated steel ventral shield preflex composite beam, comprise the top flange steel plate (2) that is cast on every side fist stage concrete (5) of bottom flange steel plate (3), links together with second stage concrete (6), it is characterized in that: also comprise corrugated steel web (1), corrugated steel web (1) is arranged between bottom flange steel plate (3) and the top flange steel plate (2), and the three forms the I-beam structure.
2, a kind of corrugated steel ventral shield preflex composite beam according to claim 1 is characterized in that: described second stage concrete (6) is cast on the top flange steel plate (2).
3, a kind of corrugated steel ventral shield preflex composite beam according to claim 1 is characterized in that: described second stage concrete (6) is connected with the upper surface of top flange steel plate (2).
4, a kind of corrugated steel ventral shield preflex composite beam according to claim 1 is characterized in that: described second stage concrete (6) is connected with six end faces of top flange steel plate (2).
5, a kind of corrugated steel ventral shield preflex composite beam according to claim 1 is characterized in that: described top flange steel plate (2) is provided with shear connector (4) with bottom flange steel plate (3).
6, a kind of corrugated steel ventral shield preflex composite beam according to claim 1 is characterized in that described I-beam structure is the constant equal altitudes beam of building height.
7, the firm web Pre-bent Combination Beam of a kind of ripple according to claim 1 is characterized in that described I-beam structure forms degree of uprising beam by changing the corrugated steel web height.
CN2009200399270U 2009-04-22 2009-04-22 Corrugated steel web pre-bending composite beam Expired - Fee Related CN201411626Y (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103437501A (en) * 2013-09-16 2013-12-11 南京工业大学 C-type steel-concrete combined corrugated web composite beam with H-shaped cross section
CN106245511A (en) * 2016-08-31 2016-12-21 湖南省交通规划勘察设计院 A kind of two-fold shape combined beam structure and construction method thereof
CN110409712A (en) * 2019-07-22 2019-11-05 清华大学 Prestressing force answers material-ultra-high performance concrete combination beam

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103437501A (en) * 2013-09-16 2013-12-11 南京工业大学 C-type steel-concrete combined corrugated web composite beam with H-shaped cross section
CN106245511A (en) * 2016-08-31 2016-12-21 湖南省交通规划勘察设计院 A kind of two-fold shape combined beam structure and construction method thereof
CN110409712A (en) * 2019-07-22 2019-11-05 清华大学 Prestressing force answers material-ultra-high performance concrete combination beam

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C17 Cessation of patent right
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20100224

Termination date: 20130422