CN211548015U - Prefabricated assembled steel-concrete composite beam - Google Patents

Prefabricated assembled steel-concrete composite beam Download PDF

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Publication number
CN211548015U
CN211548015U CN201921364934.8U CN201921364934U CN211548015U CN 211548015 U CN211548015 U CN 211548015U CN 201921364934 U CN201921364934 U CN 201921364934U CN 211548015 U CN211548015 U CN 211548015U
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concrete floor
steel bar
concrete
precast
steel
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CN201921364934.8U
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刘敏
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刘敏
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Abstract

The utility model relates to a prefabricated assembled steel-concrete composite beam, the composite beam includes I-shaped steel roof beam and precast concrete floor, and pre-buried bolt that has in the precast concrete floor, precast concrete floor still are provided with the grout hole that runs through the upper and lower surface, and the upper surface on the top edge of a wing of I-shaped steel roof beam is provided with the dowel, and the dowel is arranged in the grout hole of precast concrete floor, has pour self-compaction concrete in the grout hole, and the both sides on the I-shaped steel roof beam top edge of a wing still are provided with the bolt hole, and pre-buried bolt inserts the downthehole nut of bolt and fixes. The combined beam is simple to assemble and high in construction speed, concrete does not need to be poured on site, and environmental protection problems such as dust emission in a construction site can be effectively avoided; and has the advantages of convenient repair, convenient disassembly and the like.

Description

Prefabricated assembled steel-concrete composite beam
Technical Field
The utility model relates to a steel-concrete composite beam, concretely relates to prefabricated assembled steel-concrete composite beam.
Background
The steel-concrete composite structure (composite beam) is a novel structural form developed on the basis of a steel structure and a concrete structure, fully utilizes the advantages of the steel structure and the concrete structure, and has the advantages of high bearing capacity, high rigidity, good ductility and good earthquake resistance and the like.
At present, a steel-concrete composite structure is widely applied to the engineering fields of high-rise buildings, large-span structures, bridge structures, underground structures and the like, and plays an important role in building structure systems by virtue of excellent stress performance, construction performance and good comprehensive benefits.
The combined beam applied in the construction engineering of China at the present stage is mainly characterized in that a concrete slab is cast in place on a steel beam or a profiled steel sheet is used as a template to cast in place concrete, the steel beam and the concrete are combined through a shear connector to cooperatively bear force, but the steel-concrete combined beam has the defects of more field wet operation, long construction period, large influence of field environment on the construction quality and the like.
With the rapid development of building science, the assembly type building is more and more recognized by people due to the advantages of short construction period, effective guarantee of construction quality and the like, various assembly type building structure forms are endless, and the assembly type building is abundant, meets the requirement of green development of the building industry in China, and can greatly promote the realization of the preset target of energy conservation and emission reduction.
Disclosure of Invention
In order to further optimize the comprehensive bearing capacity and the overall mechanical property of the steel-concrete composite beam in the prior art, the utility model provides a prefabricated steel-concrete composite beam.
The technical scheme of the utility model is that: a prefabricated steel-concrete composite beam comprises an I-shaped steel beam and a prefabricated concrete floor slab, the precast concrete floor is internally provided with longitudinal structural steel bars, transverse structural steel bars, longitudinal structural steel bars and transverse structural steel bars, the longitudinal structural steel bars, the transverse structural steel bars, the longitudinal structural steel bars and the transverse structural steel bars form a double-layer steel bar net, bolts are pre-embedded in the precast concrete floor, screw rods of the bolts are exposed out of the lower surface of the precast concrete floor by 10-15cm, the precast concrete floor is also provided with grouting holes penetrating through the upper surface and the lower surface, the upper surface of the upper flange of the I-shaped steel beam is provided with studs, and the studs are positioned in the grouting holes of the precast concrete floor, self-compacting concrete is poured in the grouting holes, bolt holes are also formed in two sides of the upper flange of the I-shaped steel beam, and bolts pre-buried in the precast concrete floor slab are inserted into the bolt holes and fixed through nuts; the studs and the bolt holes arranged on the upper flange of the I-shaped steel beam are alternately arranged.
Further, the diameter of the grouting hole is 2-3 times of the diameter of the enlarged part of the stud.
Furthermore, an annular bulge is arranged on the inner wall of the grouting hole.
The annular bulge on the inner wall of the grouting hole can be made of a plastic corrugated pipe. When concrete is poured, the plastic corrugated pipe needs to be placed and fixed at the position of the reserved grouting hole and then poured, after the concrete is poured for about 2.5 hours, the plastic corrugated pipe is taken out, and the annular bulge which is the same as the outer wall of the corrugated pipe is formed on the inner wall of the grouting hole of the precast concrete floor slab.
Further, the stud height is two thirds of the thickness of the precast concrete floor.
Further, the bolt is welded and fixed with the longitudinal structural steel bar and the longitudinal structural steel bar.
Further, the transverse structural reinforcing steel bars and the longitudinal structural reinforcing steel bars are bound or welded by wires to form a reinforcing mesh, and the transverse structural reinforcing steel bars and the longitudinal structural reinforcing steel bars are bound or welded by wires to form the reinforcing mesh.
Further, the stud is welded and fixed with the upper flange of the I-shaped steel beam.
The utility model has the advantages of: 1. the prefabricated assembled steel-concrete combined beam has high industrialization degree, and the structural components can be completely manufactured in factories and are easy to process; 2. the assembly is simple, the construction speed is high, concrete does not need to be poured on site, and the environmental protection problems of dust emission and the like of a construction site are effectively avoided; 3. the damaged component is convenient to repair and replace, the disassembly is convenient, the disassembly cost is low after the building exceeds the service life, and the component meeting the strength requirement after the disassembly can be reused; 4. the transverse structural steel bars and the longitudinal structural steel bars are bound or welded by iron wires to form a steel bar mesh, and the bolts are fixedly welded with the longitudinal structural steel bars and the longitudinal structural steel bars, so that the I-shaped steel beams are connected with the steel bar mesh into a whole through the bolts, and the ductility and the seismic performance of the combined beam are improved; 5. the inner wall of the grouting hole is provided with the annular bulge, so that good bonding performance of the new and old concrete interfaces can be ensured, and the overall stress performance of the concrete is improved.
Drawings
Fig. 1 is a plan view of a prefabricated steel-concrete composite girder.
Fig. 2 is a sectional view taken along line a-a of fig. 1.
Fig. 3 is a sectional view taken along line B-B of fig. 1.
In the figure: 1 is longitudinal structure reinforcing bar, 2 is transverse structure reinforcing bar, 3 is longitudinal structure reinforcing bar, 4 is transverse structure reinforcing bar, 5 is the bolt, 6 is the peg, 7 is self-compaction concrete, 8 is the web, 9 is the bottom flange, 10 is the upper flange, 11 is precast concrete floor.
Detailed Description
Referring to the attached drawings 1-3, a prefabricated assembled steel-concrete composite beam comprises an I-shaped steel beam and a prefabricated concrete floor, wherein a longitudinal structural steel bar 1, a transverse structural steel bar 2, a longitudinal structural steel bar 3 and a transverse structural steel bar 4 are arranged in the prefabricated concrete floor, the longitudinal structural steel bar 1, the transverse structural steel bar 2, the longitudinal structural steel bar 3 and the transverse structural steel bar 4 form a double-layer steel bar net, bolts 5 are pre-embedded in the prefabricated concrete floor 11, screw rods of the bolts 5 are exposed out of the lower surface of the prefabricated concrete floor 11 by 10-15cm, the prefabricated concrete floor 11 is further provided with grouting holes penetrating through the upper surface and the lower surface, studs 6 are arranged on the upper surface of an upper flange of the I-shaped steel beam, the studs 6 are positioned in the grouting holes of the prefabricated concrete floor 11, self-compacting concrete 7 is poured in the grouting holes, bolt holes are further formed in two sides of the upper flange of the I-shaped steel, bolts 5 pre-embedded in the precast concrete floor 11 are inserted into the bolt holes and fixed by nuts; the studs 6 and bolt holes arranged on the upper flange of the steel I-beam are alternately arranged.
Further, the diameter of the grout hole is 2-3 times the diameter of the enlarged portion of the peg 6.
Furthermore, an annular bulge is arranged on the inner wall of the grouting hole.
The annular bulge on the inner wall of the grouting hole can be made of a plastic corrugated pipe. When concrete is poured, the plastic corrugated pipe needs to be placed and fixed at the position of the reserved grouting hole and then poured, after the concrete is poured for about 2.5 hours, the plastic corrugated pipe is taken out, and the annular bulge which is the same as the outer wall of the corrugated pipe is formed on the inner wall of the grouting hole of the precast concrete floor slab.
Further, the studs 6 have a height of two thirds of the thickness of the precast concrete floor slab 11.
Further, the bolt 5 is welded and fixed with the longitudinal structural steel bar 1 and the longitudinal structural steel bar 3.
Further, the longitudinal structural reinforcing bars 1 and the transverse structural reinforcing bars 2 are bound or welded with wires to form a reinforcing mesh, and the longitudinal structural reinforcing bars 3 and the transverse structural reinforcing bars 4 are bound or welded with wires to form a reinforcing mesh.
Further, the stud 6 is welded and fixed with the upper flange 10 of the steel I-beam.

Claims (5)

1. A prefabricated steel-concrete composite beam comprises an I-shaped steel beam and a prefabricated concrete floor slab, it is characterized in that the precast concrete floor slab is internally provided with a longitudinal structural reinforcing steel bar, a transverse structural reinforcing steel bar, a longitudinal structural reinforcing steel bar and a transverse structural reinforcing steel bar, the longitudinal structural reinforcing steel bar, the transverse structural reinforcing steel bar, the longitudinal structural reinforcing steel bar and the transverse structural reinforcing steel bar form a double-layer reinforcing mesh, a bolt is embedded in the precast concrete floor slab, a screw rod of the bolt is exposed out of the lower surface of the precast concrete floor slab by 10-15cm, the precast concrete floor slab is also provided with a grouting hole penetrating through the upper surface and the lower surface, the upper surface of the upper flange of the I-shaped steel beam is provided with a stud, the stud is positioned in the, self-compacting concrete is poured in the grouting holes, bolt holes are also formed in two sides of the upper flange of the I-shaped steel beam, and bolts pre-buried in the precast concrete floor slab are inserted into the bolt holes and fixed through nuts; the studs and the bolt holes arranged on the upper flange of the I-shaped steel beam are alternately arranged.
2. The precast assembled steel-concrete composite beam of claim 1, wherein an annular protrusion is provided on an inner wall of the grout hole.
3. The precast assembled steel-concrete composite beam of claim 2, wherein the diameter of the grout hole is 2-3 times the diameter of the enlarged portion of the stud.
4. The precast assembled steel-concrete composite beam of claim 1, wherein the peg height is two thirds of the thickness of the precast concrete floor.
5. The precast assembled steel-concrete composite beam of claim 3, wherein the bolt is welded and fixed to the longitudinal structural reinforcing steel bar and the longitudinal construction reinforcing steel bar.
CN201921364934.8U 2019-08-14 2019-08-14 Prefabricated assembled steel-concrete composite beam Active CN211548015U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201921364934.8U CN211548015U (en) 2019-08-14 2019-08-14 Prefabricated assembled steel-concrete composite beam

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201921364934.8U CN211548015U (en) 2019-08-14 2019-08-14 Prefabricated assembled steel-concrete composite beam

Publications (1)

Publication Number Publication Date
CN211548015U true CN211548015U (en) 2020-09-22

Family

ID=72488471

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201921364934.8U Active CN211548015U (en) 2019-08-14 2019-08-14 Prefabricated assembled steel-concrete composite beam

Country Status (1)

Country Link
CN (1) CN211548015U (en)

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