CN111236069B - A new type of tensile strength composite beam joint structure and manufacturing process - Google Patents
A new type of tensile strength composite beam joint structure and manufacturing process Download PDFInfo
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- CN111236069B CN111236069B CN202010206392.2A CN202010206392A CN111236069B CN 111236069 B CN111236069 B CN 111236069B CN 202010206392 A CN202010206392 A CN 202010206392A CN 111236069 B CN111236069 B CN 111236069B
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/12—Grating or flooring for bridges; Fastening railway sleepers or tracks to bridges
- E01D19/125—Grating or flooring for bridges
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B23/00—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects
- B28B23/02—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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Abstract
The novel anti-drawing combination beam joint structure comprises a steel beam upper flange, a bolt shear key is arranged on the upper surface of the steel beam upper flange, a concrete slab is arranged on the steel beam, the steel beam is a support of the concrete slab, a plurality of embedded part plates are arranged on the concrete slab connecting edge, each embedded part plate is divided into an embedded part, an exposed part and an overhanging connection tensile pulling head, and the embedded part is positioned in the concrete slab; the embedded part of the embedded part plate is provided with a stress steel bar hole, and the position of the stress steel bar hole corresponds to the position of the stress steel bar in the concrete slab; connecting steel bar holes are formed in the exposed parts of the embedded part plates, and the sizes of the connecting steel bar holes are required to correspond to those of the connecting steel bars; and forming a U-shaped opening between the concrete slab and the steel beam, and filling the U-shaped opening with polymer mortar. The invention improves the overall stress performance of the combined beam bridge, the tightness between the upper flange of the steel beam and the concrete, the vertical shearing resistance and durability between new and old concrete, the pulling resistance and shearing resistance between steel and the concrete and the bearing capacity of joints at the manufacturing place.
Description
Technical Field
The invention relates to the details of bridge engineering and building structure engineering and the construction field thereof, in particular to a novel anti-drawing combined beam joint structure and a manufacturing process thereof.
Background
In recent years, along with the development of economy in China, the country increasingly pays attention to the research and development and popularization of a combined structure. In order to reduce the hoisting weight of the prefabricated member of the steel-concrete composite beam and facilitate transportation, the assembled steel-concrete composite beam bridge is generally provided with joints at adjacent main beams, and the prefabricated members are assembled and then poured with joint concrete to form a whole. Wet joints are one of the most susceptible sites for failure of precast concrete deck boards during bridge operation. The wet joint is mainly composed of steel components and concrete, which together take on various internal forces to which the wet joint is subjected. The wet joint concrete is used as a main structural part of a bridge deck system and bears heavy bridge deck traffic load, the service life of the wet joint concrete has great influence on the normal operation of a bridge, cracking is a common phenomenon at wet joints from the current situation of the bridge which is put into operation at present, most of the wet joints at the bridge work at the joints, and even after the wet joint concrete of many highway bridges is poured, water seepage phenomena with different degrees occur in the curing period, and the phenomena are more serious particularly in the case of rain, which have adverse influence on the internal structure of the bridge and can cause the reduction of the durability of the bridge; The traditional joint process fills concrete with the same grade between the butted concrete plates, the prefabricated reinforced bars and the concrete are stressed together, and under the general condition, the shearing force and the hogging moment at the new and old concrete positions of the joint are often larger, and the new and old concrete positions are easy to peel under the action of reciprocating load for a long time; the traditional joint process is not provided with protective measures at joint sections, under the action of vehicle load, the upper part and the lower part of the joint at the upper part of the steel beam are reflected to be under the action of reciprocating compressive load, and the prefabricated steel bars are bent in and out of the plane, so that the local crushing phenomenon occurs, the damage can cause fatal influence on the normal service of the steel-concrete composite beam, and the durability of the bridge cannot be ensured; When the combined beam bears torque or bears local load or the negative bending moment of a support, cracks are easy to appear between new concrete and old concrete, when the laying length of a concrete slab is shorter, under the action of pressure load, vertical shearing cracks and even shearing damages are easy to appear at one end of the concrete slab close to the upper flange of the steel beam, the durability and the safety of the structure can be greatly reduced, under the action of the negative bending moment and the torque, larger vertical drawing force can appear on the concrete slab above the steel beam, at the moment, the vertical friction force between a shearing resistant piece and the concrete slab is not careful to resist the vertical drawing force, the new concrete and the old concrete can generate vertical cracks under the action of the vertical drawing force, and even the phenomenon that the new concrete is pulled and separated can appear, under the action of combined shearing force, the joint structure part is often under the action of complex stress, so that the potential safety hazard is great; In China, the steel-concrete combined bridge design specification GB50917-2013 clearly states that when a precast reinforced concrete bridge deck is used as a bridge deck, measures are adopted to enable the precast slabs to be closely adhered to steel beams so as to meet the waterproof requirement, and meanwhile, the steel-concrete combined bridge design and construction specification JTG/T D64-01-2015 specifies that the steel-concrete contact surface durability design is required to prevent the contact surface from being out of the air in terms of concrete configuration, construction requirement, construction process and the like, and the joint of the traditional process cannot achieve the tight and non-empty requirement under the action of reciprocating load. The number of bridges built and put into use every year in China is huge, and the number of bridges is a large number of newly built bridges every year worldwide, so that the quality and durability of the bridges are improved, the cost of the whole life cycle is reduced, the construction of the steel structure bridges is promoted, and the trend of the construction development of the current bridges is that the transformation, upgrading, quality improvement and synergy of highway construction are promoted.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a novel drawing-resistant combined beam joint structure and a manufacturing process, which improve the structural form of the traditional joint, can improve the overall stress performance of a combined beam bridge, the compactness between the upper flange of a steel beam and concrete, the vertical shearing resistance and durability between new and old concrete, the drawing-resistant performance and shearing resistance between steel and concrete and the bearing capacity of the joint at the manufacturing position, ensure that the steel beam and the concrete slab form an organic whole, and can be applied to the connecting procedures of various combined beam bridges.
The technical scheme adopted for solving the technical problems is as follows;
the novel anti-drawing combination beam seam structure comprises a concrete slab, a steel beam, an embedded plate, an overhanging connection tensile head, a stud shear key, a connecting steel bar hole, a stressed steel bar hole and polymer mortar, wherein the stud shear key is arranged on the upper surface of the upper flange of the steel beam, the concrete slab is arranged on the steel beam, the steel beam is a support of the concrete slab, a plurality of embedded plate are arranged on the connecting edge of the concrete slab, the embedded plate is divided into an embedded part, an exposed part and the overhanging connection tensile head, and the embedded part is positioned inside the concrete slab; the embedded part of the embedded part plate is provided with the stress steel bar holes, and the positions of the stress steel bar holes correspond to the positions of stress steel bars in the concrete slab; the connecting steel bar holes are formed in the exposed parts of the embedded part plates, and the connecting steel bar holes are required to be corresponding to the connecting steel bars in size; and a U-shaped opening is formed between the concrete slab and the steel beam, and the polymer mortar is filled into the U-shaped opening.
Furthermore, the steel beam and the stud shear key are made of weather-resistant steel, and the stud shear key is welded on the upper surface of the upper flange of the steel beam through a welding process.
Still further, during installation, the concrete slab rests on the steel beam forming a U-shaped opening with the steel beam.
Furthermore, when binding the reinforcement cage in the concrete slab, connecting the embedded plate to the reinforcement cage through the stress reinforcement hole, and welding and fixing the stress reinforcement and the embedded plate; or the embedded part of the embedded part plate is directly connected to the steel bars in the concrete slab in a welding mode.
Preferably, the exposed parts of the embedded plates on the two butt-joint concrete slab connecting edges need to be staggered.
The connecting reinforcement holes and the stress reinforcement holes are at least provided with two rows and two columns, so that the joint structure is more stable, and the stress performance is better.
Further, the spacing between the overhanging connecting pull head and the exposed portion is 0.1 to 0.5mm greater than the thickness of the upper flange of the steel beam.
Preferentially, the lower left corner of the overhanging connecting tensile pulling head is rounded, so that water accumulation is difficult to occur, and the repairing is convenient.
Preferentially, the right upper corner of the overhanging connecting tensile pulling head is made into a round inner chamfer or a right-angle chamfer, so that the overlapping of the right upper corner and a welding seam between the upper flange of the steel beam and the web plate is avoided, and the installation problem is solved.
Preferably, the surface of the overhanging connecting pull-out head should be subjected to strict surface treatment, rust removal and oil removal, sand blasting treatment of the surface is required, and the surface is brushed with an anti-corrosion and fireproof coating.
Furthermore, the upper side edge and the side edge of the overhanging connection tensile drawing head are subjected to groove treatment preferentially, the overhanging connection tensile drawing head is connected with the upper flange and the web plate of the steel beam by adopting full penetration welding, the quality of a welding seam needs to reach more than a secondary welding seam, and an anti-corrosion and fireproof process is adopted at the welding seam.
Further, when the concrete slabs are erected on the steel beams, the connection reinforcing steel bar holes on the exposed parts of the embedded plate parts on the two concrete slabs are aligned one by one, error control is performed, and then the connection reinforcing steel bars penetrate through the connection reinforcing steel bar holes one by one, so that connection relation is formed between the two concrete slabs.
The connecting steel bars are high-strength steel bars preferentially, and the brands of the connecting steel bars are higher than those of the stressed steel bars in the concrete slab.
The polymer mortar is preferably epoxy mortar.
A process for manufacturing a novel anti-drawing composite beam joint structure, which comprises the following steps:
1) Preparing concrete materials, steel bars and steel materials for manufacturing concrete slabs and steel beams;
2) Manufacturing an embedded plate, wherein a connecting steel bar hole and a stress steel bar hole are formed in the embedded plate, the embedded plate comprises an embedded part, an exposed part and an overhanging connecting tensile pull head, and the embedded plate is U-shaped;
3) The upper edge and the right edge of the overhanging connecting tensile pulling head are subjected to a beveling process according to the steel structure design rule GB50017-2017, and then the surface of the overhanging connecting tensile pulling head 31 is subjected to a rust removing and oil removing process;
4) Binding the steel bars of the concrete slab, wherein in the binding process, the embedded plate penetrates through the stressed steel bar holes arranged on the embedded plate and is fixed by adopting a welding process, so that the position of the embedded plate is ensured to be accurate;
5) Pouring concrete to form the concrete slab with the embedded plate, and curing, wherein the distance between the overhanging connecting tensile pulling head and the lower surface of the concrete slab is required to be ensured to be the thickness of the upper flange of the steel beam, and the error cannot be more than 0.5mm;
6) Welding the stud shear keys on the upper surface of the upper flange of the steel beam to form the steel beam with the stud shear keys, performing rust removal and oil removal processes on the surfaces of the steel beam and the shear keys, and performing sand blasting or red rust generation processes on the surfaces of the upper flange of the steel beam and the shear keys;
7) Conveying the steel beam with the stud shear key to a construction site for installation;
8) The concrete slab with the embedded plate is transported to a construction site for installation, the concrete slab with the embedded plate is placed on the upper flange of the steel beam with the stud shear key, and the upper flange of the steel beam is ensured to be positioned between the bottom surface of the concrete slab and all the overhanging connecting tensile pullout heads;
9) Carrying out full penetration T-shaped butt welding on the upper edge and the right edge of the overhanging connecting tensile pulling head and the upper flange and the web plate of the steel beam respectively, so that the concrete slab and the steel beam form a whole preliminarily;
10 Pouring polymer mortar into a U-shaped opening formed between a steel beam with a stud shear key and a concrete slab with a pre-buried plate;
11 After solidification, a novel anti-drawing combined beam joint structure is formed.
The beneficial effects of the invention are mainly shown in the following steps:
(1) The joint between the concrete plates is provided with the embedded plate and the connecting reinforcing steel bars, so that the connection between the concrete plates is tighter, the joint is not in a weak link under the action of dynamic load, and the joint is matched with the super-strong compression resistance, shearing resistance, deformation coordination capacity and peeling resistance of the polymer mortar, so that the joint is effectively connected between the epoxy mortar and the precast plate, and the joint of new and old blocks can be prevented from cracking under the action of external load.
(2) The concrete is tightly connected with the upper flange of the steel beam and the web plate through the overhanging connection tensile pullout head on the embedded part, so that a large shearing resistance can be provided for the joint of the combined beam, and the external shearing force can be resisted together by matching with the stud shear key;
(3) The concrete is tightly connected with the upper flange of the steel beam and the web plate through the overhanging connection tensile pulling head on the embedded part, so that the drawing action of the concrete plate under the action of the hogging moment and the torque load can be prevented, and the polymer mortar layer is tightly connected with the exposed part of the embedded plate, thereby preventing the phenomena of cracking, bulging and the like between the new concrete and the old concrete under the action of the hogging moment and the torque;
(4) The overhanging connection tensile pulling head is tightly connected with the upper flange of the steel beam and the web plate, and the phenomenon of void between the upper flange of the steel beam and the concrete plate is avoided under the condition of complex stress of a joint structure;
(5) Polymer mortar is poured, and then the tensile pulling head is connected with the upper flange of the steel beam and the web plate in a matched and overhanging manner for tight connection, so that the longitudinal shearing resistance between precast slabs can be improved, relative sliding between precast slabs is prevented, and the structure is firmer.
Drawings
Fig. 1 is a schematic front view of a novel anti-pullout composite beam seam structure and a manufacturing process.
FIG. 2 is a cross-sectional view of a novel anti-pullout composite beam seam structure and a manufacturing process.
FIG. 3 is a B-B cross-sectional view of a novel anti-pullout composite beam seam structure and fabrication process.
FIG. 4 is a C-C cross-sectional view of a novel anti-pullout composite beam seam structure and fabrication process.
Fig. 5 is a detailed view of a novel anti-drawing composite beam joint structure and a pre-buried plate 3 in a manufacturing process.
Fig. 6 is an exploded view of a novel anti-pullout composite beam seam construction and fabrication process.
In the figure, 1 is a concrete slab; 2 is a steel beam; 3 is an embedded plate; 31 is an overhanging connection tensile puller; 32 is an exposed portion; 33 is an embedded part; 4 is a stud shear key; 5 is a connecting steel bar; 51 is a connecting reinforcement hole; 6 is a stressed steel bar; reference numeral 61 denotes a stress reinforcing bar hole; 7 is polymer mortar.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Referring to fig. 1 to 6, a novel anti-drawing composite beam joint structure comprises a concrete slab 1, a steel beam 2, a pre-buried plate 3, an overhanging connection tensile puller 31, a stud shear key 4, a connection steel bar 5, a connection steel bar hole 51, a stress steel bar 6, a stress steel bar hole 61 and polymer mortar 7.
The upper surface of the upper flange of the steel beam 2 is provided with a stud shear key 4; the steel beam 2 and the stud shear key 4 are made of weather-resistant steel, and the stud shear key 4 is welded on the upper surface of the upper flange of the steel beam 2 through a welding process; the concrete slab 1 is arranged on the steel beam 2, and the steel beam 2 is a support of the concrete slab 1; in the installation process, the concrete slab 1 is placed on the steel beam 2, and a U-shaped opening is formed between the concrete slab and the steel beam 2; the connecting edge of the concrete slab 1 is provided with a plurality of embedded plate pieces 3, the embedded plate pieces 3 are divided into embedded parts and exposed parts, and the embedded parts are positioned in the concrete slab 1; the embedded part of the embedded plate 3 is provided with a stress steel bar hole 61, the position of the stress steel bar hole 61 corresponds to the position of the stress steel bar 6 in the concrete slab, when the reinforcement cage in the concrete slab 1 is bound, the embedded plate 3 is connected to the reinforcement cage through the stress steel bar hole 6, the stress steel bar 6 and the embedded plate 3 are welded and fixed, and the embedded part of the embedded plate 3 can be directly connected to the reinforcement inside the concrete slab 1 in a welding mode; the embedded plates 3 on the connecting edges of the two butted concrete plates 1 need to be staggered; connecting steel bar holes 51 are formed in the exposed part of the embedded plate 3, and the size of each connecting steel bar hole 51 is required to correspond to that of each connecting steel bar 5; the connecting reinforcing steel bar holes 51 and the stress reinforcing steel bar holes 61 are at least provided with two rows and two columns, so that the joint structure is more stable and the stress performance is better; the spacing between the overhanging connecting tensile head 31 and the exposed part 32 is 0.1 to 0.5mm greater than the thickness of the upper flange of the steel beam 2; the left lower corner of the overhanging connecting tensile pulling head 31 is made into a round angle, so that water accumulation is not easy to occur, and the repairing is convenient; the right upper corner of the overhanging connecting tensile pulling head 31 is made into a round inner chamfer or a right-angle chamfer, so that the overlapping of the right upper corner and a welding seam between the upper flange of the steel beam 2 and a web plate is avoided, and the installation problem is solved; the surface of the overhanging connection tensile pullout head 31 should be subjected to strict surface treatment, rust removal, oil removal, sand blasting treatment of the surface, and brushing of an anti-corrosion and fireproof coating on the surface; the upper side and the side of the overhanging connection tensile drawing head 31 are subjected to groove treatment preferentially, the overhanging connection tensile drawing head 31 is connected with the upper flange and the web of the steel beam 2 by adopting full penetration welding, the quality of a welding seam needs to reach more than a secondary welding seam, and the welding seam adopts an anti-corrosion and fireproof process.
When the concrete slabs 1 are erected on the steel beams 2, the connection reinforcement holes 51 on the exposed parts of the embedded plate 3 on the two concrete slabs 1 are aligned one by one, error control is performed, and then the connection reinforcements 5 penetrate through the connection reinforcement holes 51 one by one, so that a connection relationship is formed between the two concrete slabs 1; the connecting steel bars 5 are high-strength steel bars preferentially, and the grades of the connecting steel bars 5 are higher than the grades of the stressed steel bars 6 in the concrete slab; when the structure is erected, a U-shaped opening is formed between the concrete slab 1 and the steel beam 2, and the U-shaped opening is filled with polymer mortar 7; the polymer mortar 7 is preferably an epoxy mortar.
Referring to fig. 1 to 6, a process for manufacturing a novel anti-drawing composite beam joint structure includes the following steps:
1) Preparing concrete materials, steel bars and steel materials for manufacturing the concrete slab 1 and the steel beam 2;
2) Manufacturing the embedded plate 3, wherein the embedded plate 3 is provided with the connecting steel bar holes 51 and the stress steel bar holes 61, the embedded plate comprises the embedded part 33, the exposed part 32 and the overhanging connecting tensile pullout head 31, and the embedded plate 3 is U-shaped;
3) The upper edge and the right edge of the overhanging connecting tensile pulling head 31 are subjected to a chamfering process according to the steel structure design rule GB50017-2017, and then the surface of the overhanging connecting tensile pulling head 31 is subjected to a rust removal and oil removal process;
4) Binding the steel bars of the concrete slab 1, wherein in the binding process, the pre-buried plate 3 is penetrated on the stressed steel bars 6 through the stressed steel bar holes 61 arranged on the pre-buried plate, and is fixed by adopting a welding process, so that the position of the pre-buried plate 3 is ensured to be accurate;
5) Pouring concrete to form the concrete slab 1 with the embedded plate 3, curing for 28 days, wherein the distance between the overhanging connecting anti-pull head 31 and the lower surface of the concrete slab 1 is required to be ensured to be the thickness of the upper flange of the steel beam 2, and the error cannot be more than 0.5mm;
6) Welding the stud shear keys 4 on the upper surface of the upper flange of the steel beam 2 to form the steel beam 2 with the stud shear keys 4, performing rust removal and oil removal processes on the surfaces of the steel beam 2 and the stud shear keys 4, and performing sand blasting or red rust generation processes on the surfaces of the upper flange of the steel beam 2 and the shear keys 4;
7) The steel beam 2 with the stud shear key 4 is transported to a construction site for installation;
8) The concrete slab 1 with the embedded plate 3 is transported to a construction site for installation, the concrete slab 1 with the embedded plate 3 is placed on the upper flange of the steel beam 2 with the stud shear key 4, and the upper flange of the steel beam 2 is ensured to be positioned between the bottom surface of the concrete slab 1 and all the overhanging connecting tensile pullouts 31;
9) Performing full penetration T-shaped butt welding on the upper edge and the right edge of the overhanging connecting tensile pulling head 31 and the upper flange and the web plate of the steel beam 2 respectively, so that the concrete slab 1 and the steel beam 2 are initially integrated;
10 Pouring a polymer mortar 7 into a U-shaped opening formed between the steel beam 2 with the peg shear key 4 and the concrete slab 1 with the pre-buried plate 3;
11 After solidification, a novel anti-drawing combined beam joint structure is formed.
Claims (7)
1. The novel anti-drawing combination beam joint structure is characterized by comprising a concrete slab, a steel beam, pre-buried plates, an overhanging connection tensile pull head, a stud shear key, a connecting steel bar hole, a stress steel bar hole and polymer mortar, wherein the stud shear key is arranged on the upper surface of the upper flange of the steel beam, the concrete slab is arranged on the steel beam, the steel beam is a support of the concrete slab, the connecting edges of the concrete slab are provided with a plurality of pre-buried plates, the pre-buried plates are divided into pre-buried parts, exposed parts and overhanging connection tensile pull heads, and the pre-buried parts are positioned inside the concrete slab; the pre-embedded part of the pre-embedded plate is provided with the stress steel bar hole, and the position of the stress steel bar hole corresponds to the position of the stress steel bar in the concrete slab; the exposed part of the embedded plate is provided with the connecting steel bar hole, and the connecting steel bar hole is required to be corresponding to the connecting steel bar in size; a U-shaped open hole is formed between the concrete slab and the steel beam, and the polymer mortar is filled into the U-shaped open hole;
The distance between the overhanging connecting tensile puller and the exposed part is 0.1 to 0.5mm larger than the thickness of the upper flange of the steel beam; the left lower corner of the overhanging connecting tensile pulling head is made into a round angle; the upper right corner of the overhanging connecting tensile pulling head is made into a round inner chamfer or a right-angle chamfer, the surface of the overhanging connecting tensile pulling head is subjected to strict surface treatment, rust removal and oil removal, sand blasting treatment of the surface is required, and an anti-corrosion and fireproof coating is brushed on the surface; the upper side edge and the side edge of the overhanging connection tensile drawing head are subjected to groove treatment preferentially, the overhanging connection tensile drawing head is connected with the upper flange and the web plate of the steel beam by adopting full penetration welding, the quality of a welding seam needs to reach more than a secondary welding seam, and the welding seam part adopts an anti-corrosion and fireproof process; the embedded plate is U-shaped.
2. The novel anti-drawing composite beam joint structure according to claim 1, wherein the steel beam and the stud shear key are made of weather-resistant steel, and the stud shear key is welded on the upper surface of the upper flange of the steel beam through a welding process.
3. A novel anti-pullout composite girder joint construction according to claim 1 or 2, wherein during installation, the concrete slab rests on the steel girder and forms a U-shaped opening with the steel girder.
4. The novel anti-drawing composite beam joint structure according to claim 1 or 2, wherein when binding a reinforcement cage in the concrete slab, the pre-embedded plate is connected to the reinforcement cage through the stress reinforcement hole, and the stress reinforcement and the pre-embedded plate are welded and fixed; or the embedded part of the embedded plate is directly connected to the steel bars in the concrete slab in a welding mode.
5. A novel anti-pullout composite beam joint structure as claimed in claim 1 or claim 2, wherein the exposed portions of the pre-buried plates on the connecting edges of the two abutting concrete slabs are required to be staggered.
6. The novel anti-drawing composite beam joint structure according to claim 1 or 2, wherein when the concrete slabs are erected on the steel beams, the connection reinforcement holes on the exposed parts of the embedded plate parts on the two concrete slabs are aligned one by one, error control is performed, and then the connection reinforcement holes are penetrated one by one, so that a connection relationship is formed between the two concrete slabs; the connecting steel bars adopt high-strength steel bars, and the brands of the connecting steel bars are higher than those of the stressed steel bars in the concrete slab; the polymer mortar is preferably epoxy mortar.
7. A process for manufacturing a novel anti-pullout composite beam seam structure as claimed in claim 1, wherein the process comprises the steps of:
1) Preparing concrete materials, steel bars and steel materials for manufacturing concrete slabs and steel beams;
2) Manufacturing an embedded plate, wherein a connecting steel bar hole and a stress steel bar hole are formed in the embedded plate, the embedded plate comprises an embedded part, an exposed part and an overhanging connecting tensile pull head, and the embedded plate is U-shaped;
3) The upper edge and the right edge of the overhanging connecting tensile pulling head are subjected to a beveling process according to the steel structure design rule GB50017-2017, and then the surface of the overhanging connecting tensile pulling head is subjected to a rust removal and oil removal process;
4) Binding the steel bars of the concrete slab, wherein in the binding process, the embedded plate penetrates through the stressed steel bar holes arranged on the embedded plate and is fixed by adopting a welding process, so that the position of the embedded plate is ensured to be accurate;
5) Pouring concrete to form the concrete slab with the embedded plate, and curing, wherein the distance between the overhanging connecting tensile pulling head and the lower surface of the concrete slab is required to be ensured to be the thickness of the upper flange of the steel beam, and the error cannot be more than 0.5mm;
6) Welding the stud shear keys on the upper surface of the upper flange of the steel beam to form the steel beam with the stud shear keys, performing rust removal and oil removal processes on the surfaces of the steel beam and the shear keys, and performing sand blasting or red rust generation processes on the surfaces of the upper flange of the steel beam and the shear keys;
7) Conveying the steel beam with the stud shear key to a construction site for installation;
8) The concrete slab with the embedded plate is transported to a construction site for installation, the concrete slab with the embedded plate is placed on the upper flange of the steel beam with the stud shear key, and the upper flange of the steel beam is ensured to be positioned between the bottom surface of the concrete slab and all overhanging connecting tensile pullouts;
9) Carrying out full penetration T-shaped butt welding on the upper edge and the right edge of the overhanging connecting tensile pulling head and the upper flange and the web plate of the steel beam respectively, so that the concrete slab and the steel beam form a whole preliminarily;
10 Pouring polymer mortar into a U-shaped opening formed between a steel beam with a stud shear key and a concrete slab with a pre-buried plate;
11 After solidification, a novel anti-drawing combined beam joint structure is formed.
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| JP5314356B2 (en) * | 2008-08-19 | 2013-10-16 | 株式会社竹中工務店 | Composite beam, composite beam construction method, and fireproof building |
| CN105507429B (en) * | 2014-09-22 | 2019-08-13 | 贵州中建建筑科研设计院有限公司 | A kind of construction and construction method of open pore steel plate shear force |
| CN209619850U (en) * | 2018-12-26 | 2019-11-12 | 湖南大学 | A Staggered Longitudinal Rib Structure of Sectional Steel-UHPC Composite Plate |
| CN110541356B (en) * | 2019-09-05 | 2021-04-13 | 浙江交通职业技术学院 | A manufacturing process of steel-concrete composite girder bridge joint structure |
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2020
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN212270679U (en) * | 2020-03-23 | 2021-01-01 | 浙江交工国际工程有限公司 | A new type of tensile-resistant composite beam joint structure |
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