CN106049255A - Simple-support variant-continuous structure of steel-ultrahigh performance concrete light composite beam and construction method for same - Google Patents

Simple-support variant-continuous structure of steel-ultrahigh performance concrete light composite beam and construction method for same Download PDF

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Publication number
CN106049255A
CN106049255A CN201610584441.XA CN201610584441A CN106049255A CN 106049255 A CN106049255 A CN 106049255A CN 201610584441 A CN201610584441 A CN 201610584441A CN 106049255 A CN106049255 A CN 106049255A
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CN
China
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steel
ultra
performance concrete
endplate
simply supported
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CN201610584441.XA
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Chinese (zh)
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CN106049255B (en
Inventor
邵旭东
邓舒文
晏班夫
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邵旭东
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Publication of CN106049255A publication Critical patent/CN106049255A/en
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Publication of CN106049255B publication Critical patent/CN106049255B/en

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    • 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
    • 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
    • E01D19/12Grating or flooring for bridges; Fastening railway sleepers or tracks to bridges
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01DCONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D21/00Methods or apparatus specially adapted for erecting or assembling bridges
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01DCONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D2101/00Material constitution of bridges

Abstract

The invention discloses a simple-support variant-continuous structure of a steel-ultrahigh performance concrete light composite beam. The structure comprises two span simple-support beams which are disposed in opposite directions as well as a cast-in-place ultrahigh performance concrete connecting part which is used connect the two span simple-support beams, wherein each simple-support beam comprises a diaphragm beam, a bridge deck and a double I-shaped steel beam; the diaphragm beam is disposed in the double I-shaped steel beam; the bridge deck is disposed on the double I-shaped steel beam; the double I-shaped steel beam comprises a web, an I-shaped steel upper wing edge and an I-shaped steel lower wing edge; an end baffle is disposed on the double I-shaped steel beam; the end baffle is welded on the web and the I-shaped steel lower wing edge and welded to an end part of the I-shaped steel upper wing edge; the web and the I-shaped steel lower wing edge stretch out from the inner side of the end baffle; the diaphragm beam is placed on the stretched part; and the cast-in-place ultrahigh performance concrete connecting part wraps the web. The simple-support variant-continuous structure has the advantages that force bearing in a negative bending moment area is improved; and a continuous bridge has higher durability and a longer service life.

Description

Steel-ultra-high performance concrete light-duty combination beam Simply supported non-uniform structure constructs and executes Work method
Technical field
The present invention relates to a kind of bridge member and construction thereof, particularly relate to a kind of light-duty combination of steel-ultra-high performance concrete Beam Simply supported non-uniform structure structure and construction method thereof.
Background technology
Steel-UHPC (Ultra-High Performance Concrete, ultra-high performance concrete) light-duty combination beam is conducted oneself with dignity Gently, intensity is high, transport and convenient and quick construction, can fast erecting, be with a wide range of applications.Relative to traditional steel-mixed Combination beam, the light-duty combination beam of steel-UHPC has obvious economic technique superiority.But, it is similar to common steel-mixed combination beam, The light-duty combined beam structure of steel-UHPC is become top, hogging moment area concrete slab tension near consecutive hours central bearing point from freely-supported, Bottom girder steel pressurized, stress is the most unfavorable.Although, it is strong that ultra-high performance concrete has higher tension compared to conventional concrete Degree, if but tension control in hogging moment area is improper, and ultra-high performance concrete still has the risk of cracking.
Owing to the light-duty combination beam of steel-UHPC has that factory is integral prefabricated, cancels and arrange the features such as prestressing force, the most common existing solution Certainly the method for steel-mixed composite continuous bridge hogging moment area concrete cracking should not use.Accordingly, it would be desirable to seek a kind of steel-UHPC The new construction of light-duty combination beam Simply supported non-uniform, to improve hogging moment area UHPC floorings durability, extends light-duty group of steel-UHPC Close the service life of continuous bridge.
Summary of the invention
The technical problem to be solved is, overcomes the deficiency and defect mentioned in background above technology, it is provided that one Planting novel steel-ultra-high performance concrete light-duty combination beam Simply supported non-uniform structure structure and construction method thereof, this structure constructs The stressing conditions of the hogging moment area of Continuous Bridge is improved, and the concrete of hogging moment area is the most easy to crack, Continuous Bridge durable Property more preferable, service life is longer.
For solving above-mentioned technical problem, the technical scheme that the present invention proposes is:
A kind of steel-ultra-high performance concrete light-duty combination beam Simply supported non-uniform structure structure, including two be oppositely arranged across Steel-ultra-high performance concrete light-duty combination simply supported beam and connection described two are across steel-ultra-high performance concrete light-duty combination simply supported beam Cast-in-place ultra-high performance concrete connecting portion, described steel-ultra-high performance concrete light-duty combination simply supported beam includes diaphragm, bridge floor Plate and double steel I-beams, described diaphragm is located between double steel I-beam, and described floorings are located at the top of double steel I-beam, institute State double steel I-beam and include web, I-steel top flange and I-steel lower flange, described I-steel top flange be shorter in length than abdomen Plate and the length of I-steel lower flange, this pair of steel I-beam is provided with endplate, and described endplate is welded on web and I-steel Welding on lower flange and with the end of I-steel top flange, web and I-steel lower flange are stretched out from the inner side of endplate, institute Stating the part that diaphragm is placed in web and I-steel lower flange is stretched out from the inner side of endplate, the width of described diaphragm is less than abdomen The length of the part that plate stretches out from the inner side of endplate, abdomen described in described cast-in-place ultra-high performance concrete connecting portion portion envelops Plate.Arranging diaphragm between double steel I-beams can be that this Simply supported non-uniform structure structure provides initial stiffness, connects duplex word Girder steel makes an entirety;Use the I-steel top flange that differs of length and I-steel lower flange, surpass for cast in situs High performance concrete connecting portion provides convenient;Arranging endplate on web, can not only play distortion simultaneously can also be with The part that I-steel lower flange is stretched out from the inner side of endplate together when cast-in-place ultra-high performance concrete connecting portion as side Template use;Ultra-high performance concrete connecting portion parcel web is used not only can effectively to strengthen the globality of this structure structure, And the excellent compressive property of ultra-high performance concrete and the tensile property of steel can be given full play to.
Above-mentioned steel-ultra-high performance concrete light-duty combination beam Simply supported non-uniform structure structure, it is preferred that described web from The upper table of the part that the both sides of the part that the inner side of endplate is stretched out, described I-steel lower flange are stretched out from the inner side of endplate The upper surface of face, the outside of described endplate and described I-steel top flange is all welded with peg.In above-mentioned position weld stud Nail can make to combine between ultra-high performance concrete and steel plate tightr, it is to avoid delamination sliding phenomenon occurs.
Above-mentioned steel-ultra-high performance concrete light-duty combination beam Simply supported non-uniform structure structure, it is preferred that be welded in web On peg, the peg being welded on I-steel lower flange and the peg that is welded on endplate all in interlaced arrangement;Peg Height be 0.08m-0.12m, between adjacent peg be spaced 0.15m-0.30m.Interlaced arrangement is used between peg, and excellent Choosing uses above-mentioned peg height and peg interval advantageously combining closely between ultra-high performance concrete and steel plate.
Above-mentioned steel-ultra-high performance concrete light-duty combination beam Simply supported non-uniform structure structure, it is preferred that described floorings The interior pre-buried floorings that are provided with indulge muscle, and described floorings are indulged muscle and stretched out from the end of floorings, and floorings indulge muscle from floorings The part that end is stretched out is banded with connection reinforcing bar, and the upper surface of described I-steel lower flange is welded with connection reinforcing bar, described cast-in-place Ultra-high performance concrete connecting portion is coated with described connection reinforcing bar and floorings indulge the part that muscle stretches out from the end of floorings.? Floorings indulge part that muscle stretches out from the end of floorings and the upper surface in I-steel lower flange arranges connection reinforcing bar and can have Effect improves the bending resistance of cast-in-place ultra-high performance concrete connecting portion and draws performance.
Above-mentioned steel-ultra-high performance concrete light-duty combination beam Simply supported non-uniform structure structure, it is preferred that described web from The part that the inner side of endplate is stretched out has through hole, is equipped with perforation reinforcing bar in described through hole, the outside welding of described endplate Longitudinal reinforcement, described longitudinal reinforcement is had to overlap in length and breadth with described perforation reinforcing bar.
Above-mentioned steel-ultra-high performance concrete light-duty combination beam Simply supported non-uniform structure structure, it is preferred that described endplate For the slim plate of steel, the thickness of endplate is 0.01-0.02m, and the height of endplate is equal with the height of described web.
Above-mentioned steel-ultra-high performance concrete light-duty combination beam Simply supported non-uniform structure structure, it is preferred that described steel-super High performance concrete light-duty combination simply supported beam prefabricated is formed by described diaphragm, floorings and double steel I-beam are common.Diaphragm, The structure of floorings and double common prefabricated formation of steel I-beam has preferable globality, and decreases and carry out at the construction field (site) Program so that the workmanship of component is guaranteed, so for this Simply supported non-uniform structure structure stress performance provide protect Card.
Above-mentioned steel-ultra-high performance concrete light-duty combination beam Simply supported non-uniform structure structure, it is preferred that described diaphragm Width be 0.25-0.3m, diaphragm is poured by ultra-high performance concrete and is formed, and diaphragm and cast-in-place ultra-high performance concrete are even Connect the ultra-high performance concrete used by portion and be bending and tensile strength more than 20MPa, the comprcssive strength superelevation more than 120MPa Can concrete.
As a total inventive concept, it is light that another aspect of the present invention provides a kind of above-mentioned steel-ultra-high performance concrete The construction method of type combination beam Simply supported non-uniform structure structure, comprises the following steps:
S1, be prefabricated in the factory steel-ultra-high performance concrete light-duty combination simply supported beam;
S2, the pre-manufactured steel-ultra-high performance concrete obtained by described step S1 that erection is oppositely arranged at the construction field (site) are light Type combination simply supported beam, leaves space between pre-manufactured steel-ultra-high performance concrete light-duty combination simply supported beam that two are oppositely arranged;
S3, the floorings stretched out at the floorings from described pre-manufactured steel-ultra-high performance concrete light-duty combination simply supported beam are indulged On muscle, colligation connects reinforcing bar, is welded to connect reinforcing bar in I-steel lower flange from the portion of upper surface that the inner side of endplate is stretched out, Then the gap cast in situs very-high performance at the pre-manufactured steel-ultra-high performance concrete light-duty combination simply supported beam being oppositely arranged mixes Solidifying soil, forms cast-in-place ultra-high performance concrete connecting portion;
S4, cast-in-place ultra-high performance concrete connecting portion is carried out maintenance, make the pre-manufactured steel-very-high performance coagulation being oppositely arranged The light-duty combination simply supported beam of soil becomes continuous structure;
S5, after described cast-in-place ultra-high performance concrete connecting portion reaches design strength, carry out appurtenant work and bridge floor paving The construction of dress, i.e. completes the construction of described steel-ultra-high performance concrete light-duty combination beam Simply supported non-uniform structure structure.
Above-mentioned construction method, it is preferred that in described step S1, pre-manufactured steel-ultra-high performance concrete light-duty combination freely-supported Concretely comprising the following steps of beam:
S1.1, weld web, I-steel top flange, I-steel lower flange and endplate in factory so that web and I-shaped Steel lower flange is stretched out from the inner side of endplate, forms double steel I-beam;
S1.2, in the both sides of part that described web stretches out from the inner side of endplate, described I-steel lower flange from end every The upper surface of the upper surface of the part that the inner side of plate is stretched out, the outside of described endplate and described I-steel top flange all welds Peg, the part stretched out from the inner side of endplate at web offers through hole;
S1.3, in described through hole, wear perforation reinforcing bar, then weld longitudinal reinforcement in the outside of described endplate, by institute State longitudinal reinforcement to overlap in length and breadth with described perforation reinforcing bar;
S1.4, above the outside of described endplate and double steel I-beam, jointly pour diaphragm and floorings, i.e. Obtain described steel-ultra-high performance concrete light-duty combination simply supported beam.
Compared with prior art, it is an advantage of the current invention that:
(1) use the I-steel lower flange of the I-steel top flange that differs of length, endplate, employing are set on web Ultra-high performance concrete connecting portion wraps up web and arranges diaphragm between double steel I-beams, can be not only that cast in situs surpasses High performance concrete connecting portion provides convenient, and can improve the globality of this continuous bridge structure structure, gives full play to superelevation The compressive property of performance concrete excellence and the tensile property of steel, and then improve being subject to of this continuous bridge structure structure hogging moment area Power situation, extends the service life of this continuous bridge structure structure.
(2) both sides of the part stretched out from the inner side of endplate at web, I-steel lower flange are stretched from the inner side of endplate The equal weld stud of upper surface of the upper surface of the part gone out, the outside of endplate and I-steel top flange, improves superelevation The compactness that can combine between concrete and steel plate, it is to avoid delamination sliding phenomenon occurs, extends this continuous bridge structure further The service life of structure.
(3) indulge, at floorings, the part colligation connection reinforcing bar that muscle stretches out from the end of floorings, in I-steel lower flange Upper surface is welded with connection reinforcing bar, and cast-in-place ultra-high performance concrete connecting portion is coated with above-mentioned connection reinforcing bar and floorings The part that vertical muscle stretches out from the end of floorings, is effectively improved the drawing property of bending resistance of cast-in-place ultra-high performance concrete connecting portion Can, improve the stressing conditions of this continuous bridge structure structure hogging moment area, extend the service life of continuous bridge structure structure.
(4) present invention is by common to diaphragm, floorings and double steel I-beam prefabricated formation so that simply supported beam has preferably Globality, decreases the program carried out at the construction field (site), it is ensured that the workmanship of component.
(5) this steel-ultra-high performance concrete light-duty combination beam Simply supported non-uniform structure structure can use existing concrete The construction equipment of Tu Liang and construction technology, it is not necessary to increase new equipment investment, without workmen carries out new technical ability training Instruction, construction method is easy, quick.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing In having technology to describe, the required accompanying drawing used is briefly described, it should be apparent that, the accompanying drawing in describing below is the present invention Some embodiments, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to according to These accompanying drawings obtain other accompanying drawing.
Fig. 1 is the inside peg cloth of steel-ultra-high performance concrete of the present invention light-duty combination beam Simply supported non-uniform structure structure Put graphics.
Fig. 2 be steel-ultra-high performance concrete of the present invention light-duty combination beam Simply supported non-uniform structure structure in simply supported beam three Dimension schematic diagram.
Fig. 3 is the schematic three dimensional views of steel-ultra-high performance concrete of the present invention light-duty combination beam Simply supported non-uniform structure structure.
Fig. 4 is the structural facades figure of steel-ultra-high performance concrete of the present invention light-duty combination beam Simply supported non-uniform structure structure.
Fig. 5 is the sectional structure schematic diagram in Fig. 4 at A-A.
Fig. 6 is the sectional structure schematic diagram in Fig. 4 at B-B.
Fig. 7 is the inside peg cloth of steel-ultra-high performance concrete of the present invention light-duty combination beam Simply supported non-uniform structure structure Put elevation.
Fig. 8 is the xoncrete structure of steel-ultra-high performance concrete of the present invention light-duty combination beam Simply supported non-uniform structure structure Plane graph.
Marginal data:
1, web;2, I-steel top flange;3, I-steel lower flange;4, endplate;5, peg;6, through hole;7, steel is connected Muscle;8, floorings indulge muscle;9, diaphragm;10, cast-in-place ultra-high performance concrete connecting portion;11, floorings;12, longitudinal reinforcement; 13, perforation reinforcing bar.
Detailed description of the invention
For the ease of understanding the present invention, below in conjunction with Figure of description and preferred embodiment, the present invention is made more complete Face, describe meticulously, but protection scope of the present invention is not limited to embodiment in detail below.
It should be strongly noted that when a certain element be described as " be fixed on, be fixed in, be connected to or be communicated in " another Time on element, it can be directly the most fixing, affixed, connect or connect on another element, it is also possible to be by connecting in the middle of other Fitting indirectly fixing, affixed, connect or connect on another element.
Unless otherwise defined, the implication that all technical term used hereinafter is generally understood that with those skilled in the art Identical.Technical term used herein is intended merely to describe the purpose of specific embodiment, is not intended to limit the present invention Protection domain.
Unless otherwise specified, the various raw materials used in the present invention, reagent, instrument and equipment etc. all can pass through city Field is commercially available or can be prepared by existing method.
Embodiment
The embodiment of steel-ultra-high performance concrete light-duty combination beam Simply supported non-uniform structure structure of a kind of present invention, should Steel-ultra-high performance concrete light-duty combination beam Simply supported non-uniform structure structure is mainly used in light for steel-ultra-high performance concrete Type composite beam bridge is become the construction work progress of continuous system from system of simple supporting.Structure chart such as Fig. 1-Fig. 8 institute of this structure structure Showing, from Fig. 1-Fig. 8, this steel-ultra-high performance concrete light-duty combination beam Simply supported non-uniform structure structure mainly includes relatively Two arranged are across steel-ultra-high performance concrete light-duty combination simply supported beam and connect two across the light-duty combination of steel-ultra-high performance concrete The cast-in-place ultra-high performance concrete connecting portion 10 of simply supported beam.Wherein, steel-ultra-high performance concrete light-duty combination simply supported beam includes horizontal stroke Every beam 9, floorings 11 and double steel I-beam.This diaphragm 9 is located between double steel I-beam, and floorings 11 are located at double I-steel The top of beam, this steel-ultra-high performance concrete light-duty combination simply supported beam is to be total to by diaphragm 9, floorings 11 and double steel I-beam With prefabricated so that this simple beam structure has preferable globality, and decreases the operation of job site, it is ensured that The workmanship of component and the stress performance of Simply supported non-uniform structure structure.This pair of steel I-beam includes web 1, I-steel upper limb Edge 2 and I-steel lower flange 3, I-steel top flange 2 and I-steel lower flange 3 are all welded on web 1.Wherein, the thickness of web 1 Degree is preferably 0.016m, in fact it is highly preferred that for 1.02m;The thickness of I-steel top flange 2 is preferably 0.016m, and width is preferably 0.40m;The thickness of I-steel lower flange 3 is preferably 0.032m, and width is preferably 0.50m.Being shorter in length than of I-steel top flange 2 Web 1 and the length of I-steel lower flange 3, form one section of region not having I-steel top flange 2 in the end of double steel I-beams, There is provided convenient for cast in situs cast-in-place ultra-high performance concrete connecting portion 10.The end of this pair of steel I-beam is provided with endplate 4, should Endplate 4 is welded on web 1 and I-steel lower flange 3 and welds with the end of I-steel top flange 2, web 1 and I-shaped Steel lower flange 3 is stretched out from the inner side of endplate 4, and diaphragm 9 is placed in web 1 and I-steel lower flange 3 is stretched from the inner side of endplate 4 The part gone out, provides initial stiffness for this Simply supported non-uniform structure structure, connects double steel I-beam and makes an entirety.Horizontal Every the length of the part that the width of beam 9 stretches out from the inner side of endplate 4 less than web 1, cast-in-place ultra-high performance concrete connecting portion This web 1 of 10 portion envelops, strengthens the globality of this Continuous Bridge structure structure, and makes the resistance to compression of high performance concrete excellence The tensile property of performance and steel is not fully exerted.
As it is shown on figure 3, in the present embodiment, the both sides of the part that web 1 stretches out from the inner side of endplate 4, I-steel bottom wing The upper surface of the upper surface of the part that edge 3 stretches out from the inner side of endplate 4, the outside of endplate 4 and I-steel top flange 2 All it is welded with peg 5, makes to combine between ultra-high performance concrete and steel plate tightr, it is to avoid delamination sliding phenomenon occurs.Its In, the peg 5 being welded on web 1 and the peg 5 being welded on I-steel lower flange 3 and be welded in the bolt on endplate 4 Nail 5 is all in interlaced arrangement.The height of peg 5 is 0.08-0.12m, preferably 0.08m, is spaced 0.15-between adjacent peg 5 0.30m, preferably 0.15m.By in above-mentioned position weld stud 5 so that the concrete of hogging moment area is the most easy to crack, improves The durability of continuous bridge, extends the service life of continuous bridge.
In the present embodiment, in floorings 11, the pre-buried floorings that are provided with indulge muscle 8, and these floorings indulge muscle 8 from floorings 11 End is stretched out, and floorings are indulged muscle 8 and are banded with connection reinforcing bar 7 from the part that the end of floorings 11 is stretched out, I-steel lower flange 3 Upper surface is also welded with connection reinforcing bar 7, and web 1 has through hole 6 from the part that the inner side of endplate 4 is stretched out, and wears in this through hole 6 Having perforation reinforcing bar 13, the outside of endplate 4 is welded with longitudinal reinforcement 12, and this longitudinal reinforcement 12 overlaps in length and breadth with perforation reinforcing bar 13, Longitudinal reinforcement 12 stretches out from the side of diaphragm 9, and cast-in-place ultra-high performance concrete connecting portion 10 is coated with above-mentioned connection reinforcing bar 7, bridge Panel indulges part that muscle 8 stretches out and the part that longitudinal reinforcement 12 stretches out from the side of diaphragm 9 from the end of floorings 11, has Effect improves the bending resistance of cast-in-place ultra-high performance concrete connecting portion 10 and draws performance, further improves Continuous Bridge structure Durability, extends the service life of Continuous Bridge.The diameter of through hole 6 can come certainly according to the size of the perforation reinforcing bar 13 worn Fixed, its preferred a diameter of 0.02m, through hole 6 and the peg 5 on web 1 are in interlaced arrangement.Endplate 4 is the slim plate of steel, end The thickness of dividing plate 4 is 0.01-0.02m, preferably 0.02m, and its height is equal with the height of web 1.The height of diaphragm 9 and abdomen The height of plate 1 is equal, and the width of diaphragm 9 is 0.25-0.3m, preferably 0.25m;Diaphragm 9 is watered by ultra-high performance concrete Building the ultra-high performance concrete used by formation, diaphragm 9 and cast-in-place ultra-high performance concrete connecting portion 10, to be resisting bending tension strong Degree is more than 20MPa, the comprcssive strength ultra-high performance concrete more than 120MPa.
The construction method of this steel-ultra-high performance concrete light-duty combination beam Simply supported non-uniform structure structure includes following step Rapid:
S1, be prefabricated in the factory steel-ultra-high performance concrete light-duty combination simply supported beam, and its detailed process is as follows:
S1.1, weld web 1, I-steel top flange 2, I-steel lower flange 3 and endplate 4 in factory so that web 1 He I-steel lower flange 3 is stretched out from the inner side of endplate 4, forms double steel I-beam;
S1.2, in the both sides of part that above-mentioned web 1 stretches out from the inner side of endplate 4, I-steel lower flange 3 from endplate The equal weld stud of upper surface 5 of the upper surface of the part that the inner side of 4 is stretched out, the outside of endplate 4 and I-steel top flange 2, Through hole 6 is offered from the part that the inner side of endplate 4 is stretched out at web 1;
S1.3, wear in above-mentioned through hole 6 perforation reinforcing bar 13, then the outside of endplate 4 weld longitudinal reinforcement 12, will This longitudinal reinforcement 12 overlaps in length and breadth with perforation reinforcing bar 13;
S1.4, above the outside of endplate 4 and double steel I-beam, jointly pour diaphragm 9 and floorings 11, i.e. Obtain steel-ultra-high performance concrete light-duty combination simply supported beam;
S2, light-duty group of the pre-manufactured steel-ultra-high performance concrete obtained by step S1 that erection is oppositely arranged at the construction field (site) Close simply supported beam, between pre-manufactured steel-ultra-high performance concrete light-duty combination simply supported beam that two are oppositely arranged, leave space;
S3, the floorings stretched out at the floorings 11 from described pre-manufactured steel-ultra-high performance concrete light-duty combination simply supported beam On vertical muscle 8, colligation connects reinforcing bar 7, is welded to connect from the portion of upper surface that the inner side of endplate 4 is stretched out in I-steel lower flange 3 Reinforcing bar 7, then in the gap cast in situs superelevation of the pre-manufactured steel-ultra-high performance concrete light-duty combination simply supported beam being oppositely arranged Performance concrete, forms cast-in-place ultra-high performance concrete connecting portion 10;
S4, cast-in-place ultra-high performance concrete connecting portion 10 is carried out maintenance, make the pre-manufactured steel-very-high performance being oppositely arranged mix Solidifying native light-duty combination simply supported beam becomes continuous structure;
S5, after cast-in-place ultra-high performance concrete connecting portion 10 reaches design strength, carry out appurtenant work and deck paving Construction, i.e. complete this steel-ultra-high performance concrete light-duty combination beam Simply supported non-uniform structure structure construction.
This steel-ultra-high performance concrete light-duty combination beam Simply supported non-uniform structure structure can use existing precast concrete beam Construction equipment and construction technology, it is not necessary to increase new equipment investment, carry out new skills training without to workmen, execute Work method is easy, quick, significant for ensureing duration, raising efficiency of construction.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for the skill of this area For art personnel, the present invention can have various modifications and variations.All within the spirit and principles in the present invention, that is made any repaiies Change, equivalent, improvement etc., should be included within the scope of the present invention.

Claims (10)

1. steel-ultra-high performance concrete light-duty combination beam Simply supported non-uniform structure structure, including two be oppositely arranged across steel- Ultra-high performance concrete light-duty combination simply supported beam and described two showing across steel-ultra-high performance concrete light-duty combination simply supported beam of connection Water ultra-high performance concrete connecting portion (10), it is characterised in that: described steel-ultra-high performance concrete light-duty combination simply supported beam includes Diaphragm (9), floorings (11) and double steel I-beam, described diaphragm (9) is located between double steel I-beam, described floorings (11) being located at the top of double steel I-beam, described pair of steel I-beam includes under web (1), I-steel top flange (2) and I-steel The edge of a wing (3), described I-steel top flange (2) be shorter in length than web (1) and the length of I-steel lower flange (3), this duplex word Girder steel is provided with endplate (4), and described endplate (4) is welded on web (1) and I-steel lower flange (3) and and I-steel The end of top flange (2) is welded, and web (1) and I-steel lower flange (3) are stretched out from the inner side of endplate (4), described diaphragm (9) web (1) it is placed in and part that I-steel lower flange (3) stretch out from the inner side of endplate (4), the width of described diaphragm (9) The length of the part that degree stretches out from the inner side of endplate (4) less than web (1), described cast-in-place ultra-high performance concrete connecting portion (10) web described in portion envelops (1).
Steel-ultra-high performance concrete the most according to claim 1 light-duty combination beam Simply supported non-uniform structure constructs, its feature It is: the both sides of the part that described web (1) stretches out from the inner side of endplate (4), described I-steel lower flange (3) are from endplate (4) upper surface of the part that inner side is stretched out, the outside of described endplate (4) and the upper table of described I-steel top flange (2) Face is all welded with peg (5).
Steel-ultra-high performance concrete the most according to claim 2 light-duty combination beam Simply supported non-uniform structure constructs, its feature Be: the peg (5), the peg (5) being welded on I-steel lower flange (3) that are welded on web (1) and be welded in end every Peg (5) on plate (4) is all in interlaced arrangement;The height of peg (5) is 0.08m-0.12m, is spaced between adjacent peg (5) 0.15m-0.30m。
Steel-ultra-high performance concrete the most according to claim 1 light-duty combination beam Simply supported non-uniform structure constructs, its feature It is: in described floorings (11), the pre-buried floorings that are provided with indulge muscle (8), and described floorings indulge muscle (8) from floorings (11) End is stretched out, and floorings are indulged muscle (8) and are banded with connection reinforcing bar (7), described I-shaped from the part that the end of floorings (11) is stretched out The upper surface of steel lower flange (3) is welded with connection reinforcing bar (7), and described cast-in-place ultra-high performance concrete connecting portion (10) cladding is described Connect reinforcing bar (7) and floorings indulge the part that muscle (8) stretches out from the end of floorings (11).
Steel-ultra-high performance concrete the most according to claim 1 light-duty combination beam Simply supported non-uniform structure constructs, its feature Being: described web (1) has through hole (6) from the part that the inner side of endplate (4) is stretched out, described through hole is equipped with in (6) Hole reinforcing bar (13), the outside of described endplate (4) is welded with longitudinal reinforcement (12), described longitudinal reinforcement (12) and described perforation steel Muscle (13) overlaps in length and breadth.
Steel-ultra-high performance concrete the most according to claim 1 light-duty combination beam Simply supported non-uniform structure constructs, its feature Being: described endplate (4) is the slim plate of steel, the thickness of endplate (4) is 0.01-0.02m, the height of endplate (4) Equal with the height of described web (1).
Steel-ultra-high performance concrete the most according to claim 1 light-duty combination beam Simply supported non-uniform structure constructs, its feature It is: described steel-ultra-high performance concrete light-duty combination simply supported beam is by described diaphragm (9), floorings (11) and double I-steel The common prefabricated formation of beam.
8. according to the steel-ultra-high performance concrete light-duty combination beam Simply supported non-uniform structure according to any one of claim 1-7 Structure, it is characterised in that: the width of described diaphragm (9) is 0.25-0.3m, and diaphragm (9) is poured by ultra-high performance concrete Being formed, the ultra-high performance concrete used by diaphragm (9) and cast-in-place ultra-high performance concrete connecting portion (10) is resisting bending tension Intensity is more than 20MPa, the comprcssive strength ultra-high performance concrete more than 120MPa.
9. steel-ultra-high performance concrete light-duty combination beam Simply supported non-uniform the knot as according to any one of claim 1-8 The construction method of structure structure, comprises the following steps:
S1, be prefabricated in the factory steel-ultra-high performance concrete light-duty combination simply supported beam;
S2, light-duty group of the pre-manufactured steel-ultra-high performance concrete obtained by described step S1 that erection is oppositely arranged at the construction field (site) Close simply supported beam, between pre-manufactured steel-ultra-high performance concrete light-duty combination simply supported beam that two are oppositely arranged, leave space;
S3, the floorings stretched out at the floorings (11) from described pre-manufactured steel-ultra-high performance concrete light-duty combination simply supported beam are indulged The upper colligation of muscle (8) connects reinforcing bar (7), welds from the portion of upper surface that the inner side of endplate (4) is stretched out in I-steel lower flange (3) Connect reinforcing bar (7) in succession, then on-the-spot in the gap of the pre-manufactured steel-ultra-high performance concrete light-duty combination simply supported beam being oppositely arranged Pour ultra-high performance concrete, form cast-in-place ultra-high performance concrete connecting portion (10);
S4, cast-in-place ultra-high performance concrete connecting portion (10) is carried out maintenance, make the pre-manufactured steel-very-high performance coagulation being oppositely arranged The light-duty combination simply supported beam of soil becomes continuous structure;
S5, after described cast-in-place ultra-high performance concrete connecting portion (10) reaches design strength, carry out appurtenant work and bridge floor paving The construction of dress, i.e. completes the construction of described steel-ultra-high performance concrete light-duty combination beam Simply supported non-uniform structure structure.
Construction method the most according to claim 9, it is characterised in that in described step S1, pre-manufactured steel-very-high performance mixes Concretely comprising the following steps of solidifying native light-duty combination simply supported beam:
S1.1, factory welding web (1), I-steel top flange (2), I-steel lower flange (3) and endplate (4) so that abdomen Plate (1) and I-steel lower flange (3) are stretched out from the inner side of endplate (4), form double steel I-beam;
S1.2, in the both sides of part that described web (1) stretches out from the inner side of endplate (4), described I-steel lower flange (3) from The upper surface of the part that the inner side of endplate (4) is stretched out, the outside of described endplate (4) and described I-steel top flange (2) The equal weld stud of upper surface (5), offer through hole (6) at web (1) from the part that the inner side of endplate (4) is stretched out;
S1.3, in described through hole (6), wear perforation reinforcing bar (13), then at the longitudinal steel of the outside of described endplate (4) welding Muscle (12), overlaps with described perforation reinforcing bar (13) in length and breadth by described longitudinal reinforcement (12);
S1.4, jointly pour diaphragm (9) and floorings in the outside of described endplate (4) and the top of double steel I-beam (11) described steel-ultra-high performance concrete light-duty combination simply supported beam, is obtained.
CN201610584441.XA 2016-07-22 2016-07-22 The light-duty combination beam Simply supported non-uniform structure construction of steel and ultra-high performance concrete and its construction method CN106049255B (en)

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