CN214785185U - Floor slab through-type steel-concrete combined flat beam floor structure and building thereof - Google Patents

Abstract

The utility model provides a floor slab through-type steel-concrete composite flat beam floor system structure and a building thereof, relating to the building field, wherein the floor slab through-type steel-concrete composite flat beam floor system structure comprises a floor system and a steel beam; the steel beam is hidden in the height range of the floor system. The utility model has the advantages of no exposure of steel beams and good indoor effect of buildings; the steel structure integrates fire prevention, corrosion prevention and decoration, has good corrosion prevention and fire prevention performance, and is free of maintenance during the service life; the pipeline is integrated with the structure, and the floor structure is small in height; the floor has good stress performance and strong integrity; the prefabricated steel structure component has the advantages of factory prefabrication, field assembly construction, high construction efficiency, short construction period and the like, solves the problems and the defects of the application of the existing beam-slab floor structure in the steel structure assembly type house, and has good popularization and application prospects in the steel structure assembly type house.

Description

Floor slab through-type steel-concrete combined flat beam floor structure and building thereof

Technical Field

The utility model belongs to the technical field of the building technique and specifically relates to a green energy-conserving floor holds formula steel-concrete combination flat beam superstructure structure under floor and building thereof.

Background

In steel structure engineering, the floor slab mostly adopts floor slab forms such as cast-in-place concrete floor slab, profiled sheet composite floor slab, steel bar truss floor carrier plate, and the floor slab is located the girder steel top flange, and both work jointly through welded stud on the girder steel. The beam slab structure has the advantages of large structure height, good stress performance, convenient construction, good economy and the like, and is widely applied to public buildings such as office buildings, markets, schools and the like.

When the traditional steel structure beam plate structure form is popularized and applied to the steel structure fabricated house, steel beams are exposed, and furniture placement and indoor viewing are affected; the steel beam is exposed, the corrosion-resistant and fireproof performance is poor, corrosion-resistant and fireproof protection is needed, the corrosion-resistant and fireproof coating has the effective period far less than the service life of the structural design, the corrosion-resistant and fireproof coating needs to be maintained and replaced in the service life of a house and is difficult to implement, so that the most of the large objects cannot be used to the greatest extent, and the waste of energy is caused.

Meanwhile, the floor structure is large in height, occupies more building height, and the number of layers of the building which can be built is influenced under the condition of limiting the height, so that the enthusiasm of developers for selecting the steel structure assembled houses is influenced. Therefore, the development of a novel floor structure which is prefabricated in a factory, constructed in an on-site assembly manner, good in corrosion and fire resistance and small in height becomes one of the key technical problems to be solved urgently in the current steel structure assembly type residence development.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a floor holds formula steel-concrete combination flat beam superstructure structure under floor and building to solve at least one above-mentioned technical problem who exists among the prior art.

In order to solve the technical problem, the utility model provides a pair of floor bears formula steel-concrete combination flat beam superstructure structure under floor, include: floor and steel beams; the steel beam is hidden in the height range of the floor system.

Further, the floor comprises a concrete precast slab and a structural layer which is arranged at present; the steel beam comprises an upper flange, a lower flange and a web plate; the end part of the concrete precast slab comprises a lap joint part which is lapped on the lower flange; the existing structural layer is laid above the concrete precast slab, and the upper flange is embedded in the existing structural layer.

Furthermore, the concrete precast slab is provided with a notch for lapping and accommodating the steel beam lower flange below the lapping part, and the height of the notch is greater than the thickness of the lower flange and is used for coating the lower flange in the height direction. I.e. the thickness or height of the overlapping parts is smaller than the thickness or height of the non-overlapping parts.

Further, the notch is rectangular; the width of the notch is 25-55 mm; the height of the notch is the thickness of the lower flange of the steel beam plus 20-30 mm.

Furthermore, the concrete precast slab is internally provided with slab bottom distribution steel bars.

Further, the anti-cracking steel bar is also included; one part of the anti-cracking reinforcing steel bars is arranged on the upper side of the gap and in the overlapping part of the concrete precast slab, and the other part of the anti-cracking reinforcing steel bars extends into the non-overlapping part of the concrete precast slab to prevent the overlapping part from cracking.

Furthermore, the steel beam is an unequal flange steel beam, and the lower flange is 40-100 mm wider than the upper flange, so that the concrete precast slab can be placed conveniently.

Furthermore, holes are formed in the web plate at intervals and used for penetrating through the perforated steel bars and the ground heating layer pipeline, concrete on two sides of the web plate is communicated, and structural integrity is improved.

Preferably, the perforated steel bars penetrate through the holes of the web plates of the steel beams and are placed on the top of the concrete precast slab, and the placing length of the top of the concrete precast slab is larger than the lapping length of the bottom steel bars of the concrete precast slab, so that the force transmission of the bottom steel bars of the concrete slab and the joint work of the steel beams and the concrete slabs on two sides are realized.

Furthermore, the steel beam is an equal-flange steel beam, and the upper flange is provided with a notch, so that the lap joint part is inserted between the upper flange and the lower flange from outside through the notch and finally lapped on the lower flange.

Further, the reinforcing rib plate is used for covering the notch and reinforcing the notch; and after the concrete precast slab is installed, covering the reinforced rib plate on the opening, and fixedly connecting two ends of the reinforced rib plate with two side edges of the opening of the upper flange through bolts.

The upper flange and the lower flange of the equal-flange steel beam clamp the lap joint part from the upper direction and the lower direction, so that the upper limit and the lower limit of the lap joint part are realized, and the anti-seismic performance of the structure is greatly improved. Simultaneously for unequal flange girder steel, girder steel bearing capacity promotes greatly.

Further, the existing structural layer comprises a light filling layer and a cast-in-place concrete layer from bottom to top in sequence, and the light filling layer is made of light filling materials.

The light filling layer is used for improving the structural strength and rigidity of the floor system, enhancing the sound insulation performance of the floor system, improving the use comfort and matching different steel beam heights.

The light filling material can be selected from rock wool boards, EPC extruded polystyrene boards, foam concrete, foamed polyurethane and other light materials, is filled between the precast concrete board and the cast-in-place concrete surface layer, and is used for reducing the self weight of the floor slab and improving the heat insulation performance and the sound insulation performance of the floor slab.

Further, the steel bar connecting device also comprises a steel bar connecting sleeve and a prefabricated connecting key; the plurality of steel bar connecting sleeves are preset in the concrete precast slab, and connecting holes are reserved on the top surface of the concrete precast slab by the steel bar connecting sleeves;

the prefabricated connecting keys comprise shear steel bars and concrete prefabricated blocks; the concrete precast block is embedded in the light filling layer, the middle part of the shear steel bar is embedded in the concrete precast block, and the lower end of the shear steel bar extends out of the concrete precast block and the bottom of the light filling layer and is screwed into the connecting hole of the steel bar connecting sleeve; the upper ends of the shear steel bars extend out of the tops of the concrete precast blocks and the light filling layer and extend into the in-situ poured concrete layer.

Preferably, a steel bar anchoring plate is arranged at the upper end of the shear steel bar; and/or a steel bar anchoring plate is arranged at the bottom of the steel bar connecting sleeve. The reinforcing steel bar anchoring plate is used for increasing connection, and reliable force transmission is achieved.

Preferably, the lower end of the shear steel bar is provided with a steel bar straight thread matched with the connecting hole of the steel bar connecting sleeve.

The prefabricated connecting keys are used for connecting the concrete prefabricated slab and the cast-in-place concrete layer, so that the concrete prefabricated slab, the light filling layer and the cast-in-place concrete layer are mixed into a whole, and stress transfer and combined work of the concrete prefabricated slab, the light filling layer and the cast-in-place concrete layer are achieved.

Preferably, the shear reinforcement has a diameter of not less than 12 mm.

Furthermore, the steel bar connecting sleeves are arranged on the concrete precast slab in a matrix manner, and the distance is 400-1500 mm.

Further, the existing structural layer further comprises a lower heat insulation layer, a ground heating layer, an upper heat insulation layer and a building surface layer which are sequentially arranged above the existing cast concrete layer. And a heating pipeline is arranged in the ground heating layer and is used for indoor heating in northern areas in winter. The ground heating layer is arranged on the upper side of the cast-in-place concrete layer and is positioned in the height range of the steel beam web plate; and when the heating pipeline in the ground heating layer meets the steel beam, the heating pipeline penetrates through the steel beam web plate through the hole. The heat preservation layers are arranged above and below the ground heating layer, so that heat loss of the ground heating layer is avoided, and the heating efficiency is improved. And a building surface layer is arranged on the top of the ground heating layer, and the building surface layer manufacturing method is given by a building design manufacturing method. The building surface course is 25-100 mm higher than the upper flange.

Further, the fireproof protection layer is laid at the bottom of the lower flange; the fireproof protection layer is positioned in a groove formed by enclosing the steel beam lower flange and the concrete precast slabs on the two sides of the steel beam, consists of 15 mm-thick fireproof paint and 5 mm-thick cement mortar leveling layer and is used for providing a fire resistance limit for at least two hours. The fireproof protection layer is carried out after the construction of the floor building surface layer is finished, so that the cracking of the fireproof protection layer caused by the deformation of the steel beam due to the post-loading can be avoided.

In addition, the utility model also discloses a building adopting the floor slab through-type steel-concrete composite flat beam floor structure, which also comprises a superposed column; the two ends of the steel beam are connected to the steel pipes in the superposed columns through the outwards extending brackets.

Adopt above-mentioned technical scheme, the utility model discloses following beneficial effect has:

the floor slab through-put type steel-concrete combined flat beam floor system structure and the building thereof provided by the utility model have the advantages that the steel beam is not exposed, and the indoor effect of the building is good; the steel structure integrates fire prevention, corrosion prevention and decoration, has good corrosion prevention and fire prevention performance, and is free of maintenance during the service life; the service life of the steel structure can be prolonged to the greatest extent, the best use of things is achieved, the consumption of steel is reduced, and the aims of environmental protection and energy conservation are achieved.

The pipeline is integrated with the structure, and the floor structure is small in height; the floor has good stress performance and strong integrity; the prefabricated steel structure component has the advantages of factory prefabrication, field assembly construction, high construction efficiency, short construction period and the like, solves the problems and the defects of the application of the existing beam-slab floor structure in the steel structure assembly type house, and has good popularization and application prospects in the steel structure assembly type house.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments or the description in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural view of a floor slab through-floor steel-concrete composite flat beam floor structure provided in embodiment 1 of the present invention;

FIG. 2 is a schematic structural view of a floor structure provided with a lightweight filling layer in example 1;

FIG. 3 is a schematic structural view of the prefabricated connecting key shown in FIG. 2;

FIG. 4 is a schematic structural view of a steel bar connecting sleeve in a concrete precast slab;

FIG. 5 is a schematic diagram of matrix arrangement of reinforcing steel bar connecting sleeves on a concrete precast slab;

FIG. 6 is a schematic diagram of matrix arrangement of prefabricated connecting keys in a light filling layer;

fig. 7 is a schematic structural view of the matching of the steel beam and the concrete precast slab in embodiment 2 of the present invention;

fig. 8 is a side view of a steel beam in embodiment 2 of the present invention;

fig. 9 is a schematic structural view of a laminated column provided in embodiment 3 of the present invention;

FIG. 10 is a schematic view of the construction of the additional stirrup shown in FIG. 9;

FIG. 11 is a schematic view showing a column shoe connecting structure of a composite column according to example 3;

FIG. 12 is a schematic structural view of a pillar bottom plate in embodiment 3;

FIG. 13 is a schematic view showing the structure of column butt joint in example 3;

FIG. 14 is a partially enlarged view showing the abutment of the pillars in embodiment 3;

FIG. 15 is a schematic structural view of the composite post and the steel beam in connection according to embodiment 3;

FIG. 16 is a schematic structural view of a top partition of a steel pipe of a laminated column in example 3;

fig. 17 is a schematic structural view of a laminated column provided in embodiment 4 of the present invention;

fig. 18 is a schematic structural view of column butting in example 4.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The present invention will be further explained with reference to specific embodiments.

Example 1

As shown in fig. 1, the present embodiment provides a floor slab through-floor steel-concrete composite flat beam floor structure, including: floor 10 and steel beam 20; the steel beam 20 is hidden in the height range of the floor 10.

The floor 10 comprises a concrete precast slab 11 and an existing structural layer; the steel beam 20 comprises an upper flange 22, a lower flange 21 and a web 23; the end of the concrete precast slab 11 includes an overlapping part 11a, the overlapping part 11a overlapping on the lower flange 21; the existing structural layer is laid above the concrete precast slab 11, and the upper flange 22 is embedded in the existing structural layer. The web plate 23 is provided with a through-bar hole 23a and a pipeline hole 23b at intervals, which are respectively used for penetrating through a through-bar and a pipeline of the ground heating layer 14, and the concrete on the two sides of the web plate 23 is communicated, so that the structural integrity is improved.

The existing structural layer is a structural layer laid or poured on site, and as shown in fig. 1, the existing structural layer includes: and a concrete layer 12, a lower insulating layer 13, a ground heating layer 14, an upper insulating layer 15 and a building surface layer 16 are cast. Wherein, the ground heating layer 14 is provided with a heating pipeline inside for indoor heating in winter in northern areas. The ground heating layer 14 is arranged on the upper side of the cast-in-place concrete layer and is positioned within the height range of the steel beam 20 web plate 23; when meeting the steel beam 20, the heating pipeline in the ground heating layer 14 passes through the pipeline hole 23b along the web 23 of the steel beam 20.

The upper and lower heat preservation that is provided with of ground heating layer 14 avoids 14 heats in ground heating layer to scatter and disappear, improves heating efficiency. The top of the ground heating layer 14 is provided with a building surface layer 16, and the building surface layer 16 is made by building design. The building surface layer 16 is higher than the upper flange 2225-100 mm.

The cast-in-place concrete layer 12 is internally provided with perforated steel bars 12a, the perforated steel bars 12a pass through the perforated steel bar holes 23a on the web plates 23 of the steel beams 20 and are placed at the top of the concrete precast slab 11, the placing length of the top of the concrete precast slab 11 is larger than the lapping length of the bottom steel bars of the concrete precast slab 11, and the concrete precast slab is used for realizing the force transmission of the bottom steel bars of the concrete slab and the joint work of the steel beams 20 and the concrete slabs at two sides.

In addition, the fireproof protection layer 30 is laid at the bottom of the lower flange 21; the fireproof protection layer is positioned in a groove formed by enclosing the lower flange 21 of the steel beam 20 and the concrete precast slabs 11 on two sides of the steel beam 20, consists of a fireproof coating 31 with the thickness of at least 15mm and a cement mortar 32 with the thickness of at least 5mm, and is used for providing the fireproof limit for not less than two hours. The fireproof protective layer is carried out after the construction of the building surface layer 16 of the floor 10 is finished, so that the cracking of the fireproof protective layer caused by the deformation of the steel beam 20 due to the post-loading can be avoided.

The concrete precast slab 11 is provided with a notch for overlapping and receiving the lower flange 21 of the steel beam 20 below the overlapping part 11a, and the notch has a height greater than the thickness of the lower flange 21 and covers the lower flange 21 in a height direction. I.e., the thickness or height of the overlapping portion 11a is smaller than the thickness or height of the non-overlapping portion 11 a. Wherein, the gap is rectangular; the width of the notch is 25-55 mm; the height of the notch is the thickness of the lower flange 21 of the steel beam 20 plus 20-30 mm.

The concrete precast slab 11 is internally provided with slab bottom distribution steel bars 11b and anti-cracking steel bars 11 c; one part of the anti-cracking steel bar 11c is arranged on the upper side of the notch and in the overlapping part 11a of the concrete precast slab 11, and the other part of the anti-cracking steel bar 11c extends into the non-overlapping part of the concrete precast slab 11 and is used for preventing the overlapping part 11a from cracking.

In the embodiment, the steel beam 20 is an unequal flange steel beam 20, and the lower flange 21 is wider than the upper flange 22 by 40-100 mm, so that the concrete precast slab 11 can be conveniently placed.

As shown in fig. 2, in the above technical solution, optionally, the existing structural layer may further include a light filling layer 17, and the light filling layer 17 is laid between the cast-in-place concrete layer 12 and the concrete precast slab 11, and is used to improve the structural strength and rigidity of the floor 10, enhance the sound insulation performance of the floor 10, improve the use comfort, and match different heights of the steel beam 20, i.e., to play a role of raising, so that the existing structural layer completely covers or wraps the steel beam 20, and has a light weight and a low cost.

The lightweight filling layer 17 is made of lightweight filling material. The light filling material can be selected from rock wool boards, EPC extruded polystyrene boards, foam concrete, foamed polyurethane and other light materials, is filled between the precast concrete board and the cast-in-place concrete surface layer, and is used for reducing the self weight of the floor slab and improving the heat insulation performance and the sound insulation performance of the floor slab.

Prefabricated connecting keys 40 are embedded in the light filling layer 17, as shown in fig. 3, the prefabricated connecting keys 40 comprise shear steel bars 42 and concrete prefabricated blocks 41; the concrete precast block is embedded in the light filling layer 17, the middle part of the shear steel bar 42 is embedded in the concrete precast block 41, and the lower end of the shear steel bar extends out from the concrete precast block and the bottom of the light filling layer 17 and is screwed into the steel bar connecting sleeve 50 in the concrete precast slab 11; the upper ends of the shear steel bars extend out of the top of the concrete precast block and the top of the light filling layer 17 and extend into the cast-in-place concrete layer 12. A first steel bar anchoring plate 42a is fixedly arranged at the upper end of the shear steel bar; as shown in fig. 4, the bottom of the steel bar connecting sleeve 50 is provided with a second steel bar anchoring plate 51 for increasing connection and realizing reliable force transmission.

The plurality of steel bar connecting sleeves 50 are preset in the concrete precast slab 11, and the steel bar connecting sleeves 50 are provided with connecting holes (threaded holes) on the top surface of the concrete precast slab 11; the lower end of the shear steel bar 42 is provided with a steel bar straight thread adapted to the connection hole of the steel bar connection sleeve 50.

As shown in fig. 5, the steel bar connecting sleeves 50 are arranged on the concrete precast slab 11 in a matrix form, and the distance between the steel bar connecting sleeves is 400mm to 1500 mm. As shown in fig. 6, the preformed connection bonds 40 are also arranged in a matrix within the lightweight filler layer 17.

The prefabricated connecting key 40 is used for connecting the concrete precast slab 11 and the cast-in-place concrete layer, so that the concrete precast slab 11, the light filling layer 17 and the cast-in-place concrete layer are mixed into a whole, and stress transfer and the joint work of the three are realized. Preferably, the shear reinforcement has a diameter of not less than 12 mm.

The floor structure of the embodiment comprises the following implementation steps:

1) and after the steel beam is installed in place, hoisting the concrete precast slab, wherein the concrete precast slab is placed on the lower flange of the steel beam, and the placing length is 20-50 mm.

2) And (3) penetrating the perforated steel bars along the steel bar holes of the webs of the unequal flange steel beams, placing the perforated steel bars on the top of the concrete precast slab, and arranging the constructional steel bars to fix the positions of the perforated steel bars.

3) Binding surface layer reinforcing steel bars on site, pouring a cast-in-place concrete surface layer, and maintaining concrete.

4) After the strength of the concrete reaches the designated strength, laying a heat preservation layer on the top surface of the cast-in-place concrete surface layer, laying a ground heating layer pipeline, and passing the ground heating layer pipeline along a steel beam web plate pipeline hole when the ground heating layer pipeline meets the unequal flange steel beam.

5) The top surface of the ground heating layer is provided with a heat insulation layer, and the top surface of the heat insulation layer is provided with a building surface layer.

6) Constructing a lower flange fireproof protective layer of the unequal flange steel beam, coating a 15mm thick fireproof coating, and leveling by using 5mm cement mortar.

The utility model provides a floor deck bears formula steel-concrete combination flat beam superstructure structure under and building has following advantage:

1) the steel beam is not exposed, and the indoor effect of the building is good. The steel beam is hidden in the floor slab, the ground heating layer and the building surface layer through a special structure, so that the steel beam is prevented from being exposed, the indoor effect of the building is good, and the user experience is good.

2) The steel structure integrates fire prevention, corrosion prevention and decoration, has good corrosion prevention and fire prevention performance, and is free of maintenance in the service life. The steel beam is hidden in the floor slab, the ground heating layer and the building surface layer, and has good corrosion resistance and fire resistance.

3) The pipeline and the structure are integrated, and the floor structure is small in height. Through setting up the heating pipeline in girder steel web height range, realize the integration of pipeline and structure, reduce superstructure structure height by a wide margin, save the building usage space.

4) The floor system has good stress performance and strong integrity. Through the trompil of girder steel web and setting up the perforation reinforcing bar, the perforation reinforcing bar plays concrete precast slab base reinforcing bar biography power and cotter pin effect simultaneously, can realize the cooperative work of girder steel both sides concrete slab and girder steel and concrete slab's combined work, and the superstructure atress performance is good, and the arrangement nature is strong.

5) The components are prefabricated in factories and assembled and constructed on site, the construction efficiency is high, and the construction period is short.

Example 2

The structure of the present embodiment is substantially the same as that of embodiment 1, except that:

as shown in fig. 7, the steel beam 20 is an equal-flange steel beam 20, one or more openings 22b are formed in the upper flange 22, and the overlapping part 11a of the concrete precast slab 11 is inserted between the upper flange 22 and the lower flange 21 from outside through the openings, then horizontally moved, sequentially arranged side by side, and finally overlapped on the lower flange 21.

As shown in fig. 8, further includes a reinforcing rib plate 60 for covering the notch and reinforcing the notch; and after the concrete precast slab 11 is installed, covering the opening with a reinforcing rib plate, wherein two ends of the reinforcing rib plate are fixedly connected with two side edges of the opening of the upper flange 22 through bolts.

The upper flange 22 and the lower flange 21 of the equal-flange steel beam 20 clamp the lapping part 11a from the upper direction and the lower direction, so that the upper limit and the lower limit of the lapping part 11a are realized, and the seismic performance of the structure is greatly improved. Simultaneously for unequal flange girder steel 20, girder steel 20 bearing capacity promotes greatly.

Example 3

The embodiment discloses a building adopting the floor slab through-type steel-concrete combined flat beam floor structure, and further comprises a superposed column for supporting a steel beam.

As shown in fig. 15, the two ends of the steel beam 20 are connected to the steel pipes 110 in the superposed column 100 through the overhanging brackets 160, and the steel beam 20 is hidden in the height range of the floor 10.

As shown in fig. 9, the composite column 100 includes a steel pipe 110, a concrete filled pipe column 120, a concrete layer 130 outside the pipe, and a steel skeleton; a pipe filling concrete column 120 formed by filling and pouring during prefabrication is arranged in the steel pipe 110; the outer concrete layer 130 is wrapped outside the steel pipe 110; the steel reinforcement framework is embedded in the concrete layer 130 outside the pipe; the steel pipe 110 has connection structures at both ends thereof for connection with a foundation, a steel beam, or a column.

The tube-in-tube concrete column 120 is cast from self-compacting concrete; the outer concrete layer 130 is made of common strength concrete, and the concrete is labeled from C35 to C50. The steel pipe 110 is a circular steel pipe, a rectangular steel pipe, or a polygonal steel pipe.

The steel reinforcement skeleton includes: column longitudinal ribs 140 and stirrup sets 150; the column longitudinal ribs 140 are arranged along the length direction of the steel pipe 110, and the column longitudinal ribs 140 are substantially parallel to the steel pipe 110; the plurality of stirrup sets 150 are arranged at intervals in the length direction of the steel pipe 110 and are used for hooping the column longitudinal ribs 140 so as to fix the positions of the column longitudinal ribs 140 and restrain the deformation of the column longitudinal ribs 140. Each stirrup group 150 comprises: a column stirrup 151 and a plurality of additional stirrups 152; the two ends of the additional stirrup 152 are connected with the column stirrup 151, and the column longitudinal bar 140 is clamped by the additional stirrup 152 and the column stirrup 151. A plurality of column longitudinal ribs 140 are arranged at intervals in the circumferential direction of the steel pipe 110; preferably, the column longitudinal ribs 140 are disposed at the corners of the laminated column 100 so as to avoid overhanging corbels and connecting flanges.

As shown in fig. 10, the additional stirrup 152 is in a zigzag shape, hooks are provided at both ends, and a connecting pin or the like which engages with the hooks is provided at the corner of the column stirrup 151, whereby the additional stirrup can be quickly laid.

Wherein the length of the steel pipe 110 is several times of the height of the building layer. Namely, the prefabricated assembly type steel pipe concrete composite column 100 adopts 2-3 layers as a prefabricated unit; can be used for center posts, side posts and corner posts.

The concrete layer 130 outside the pipe is reserved with a post-cast section at one end or two ends of the steel pipe 110 and extending out of the bracket and the connecting flange, the steel pipe 110 is exposed at the post-cast section, the on-site installation is convenient, and the post-cast section is cast in place by using a mold after the installation or the connection with the component.

As shown in fig. 11, a column base plate 111 is fixedly provided to the bottom of the steel pipe 110, and as shown in fig. 12, the column base plate 111 is provided with a bolt hole for connecting to a column base anchor bolt 210 of the foundation 200. The column longitudinal bars 140 and the foundation joint bars can be mechanically connected through reinforcing steel bars; the post-cast section 131 is arranged at the column foot position of the outer concrete layer 130, and after the steel tube 110 in the column is connected with the column longitudinal ribs 140, the post-cast concrete is poured by formwork erection to finish the pouring of the outer concrete layer 130 of the outer column pipe of the post-cast section 131 of the prefabricated column.

As shown in fig. 13 to 14, one or both ends of the steel pipe 110 are provided with a connection flange 112 for a fixed connection between two adjacent composite columns 100. When the columns are vertically spliced, a concrete post-pouring section 131 is reserved at the butt joint part of the superposed column 100, a flange plate is arranged at the end part of the steel pipe 110 in the column, and stiffening ribs 113 are arranged at intervals along the annular direction of the connecting flange 112; the upper and lower section column inner steel pipes 110 are flange-connected by high-strength bolts, and the column longitudinal bars 140 at the four corners of the column are reinforcing steel bars and are mechanically connected by reinforcing steel bar connecting sleeves 142; after the steel pipe 110 in the column is connected with the column longitudinal ribs 140 at four corners, the post-cast section 131 on the outer side of the steel pipe 110 is cast by a formwork, and then the column-column butt joint connection is completed.

As shown in fig. 15, an overhanging bracket 160 is further included, and the overhanging bracket 160 is fixedly (preferably welded) connected with the steel pipe 110 for connecting with the steel beam 20. Specifically, the outrigger bracket 160 is divided into two types of a column top and a column. When connected, the steel beam 20 is butted against the outrigger bracket 160 and fixed by the connecting plate 162 and the reinforcing bolt 163.

The concrete layer 130 outside the pipe leaves a post-cast section at the position of the extending bracket 160, the extending bracket 160 can be welded on the steel pipe in advance, or the extending bracket 160 is welded and fixed on the steel pipe 110 at the post-cast section according to the height of the layer on site, a hoop hole 161 is reserved on the extending bracket 160, after the extending bracket is connected and fixed with the steel beam, the column hoop 151 penetrates through the hoop hole 161 and is sleeved outside the steel pipe, and then the post-cast section is cast by using a mold. Therefore, the overhung bracket 160 can uniformly transmit part of load to the external concrete layer 130 through the column stirrups 151, the mechanical property of the superposed column is better, the external concrete layer 130 is not easy to crack, and the service life is longer.

The top of the steel tube 110 is provided with a partition 170 for sealing the inner hole of the steel tube 110, as shown in fig. 16, the middle of the partition is provided with a pouring hole 171 with a diameter not less than 120mm for pouring concrete; air holes 172 with the aperture not less than 20mm are formed in the periphery of the partition plate and used for ventilation during concrete pouring so as to ensure that concrete in the steel pipe is poured compactly.

The utility model provides a superimposed column is prefabricated cylinder, and it has following advantage:

1) the bearing performance is good, the anti-seismic performance is strong, the column section is small, and the durability is strong. The steel tube concrete composite column inherits the advantages of the steel tube concrete composite column and has the advantages of being good in stress performance, strong in anti-seismic performance, small in column section, strong in durability and the like.

2) The prefabricated and high-quality components in the factory are obtained; the field assembly construction has small wet operation amount, energy conservation and environmental protection. The steel tube concrete composite column realizes the factory prefabrication and field assembly construction of the steel tube concrete composite column, the quality of factory prefabricated components is ensured, and the precision is greatly improved; the field wet operation amount is greatly reduced, and the environmental pollution and the generation of construction waste are greatly reduced.

3) The site operation process is few, and the efficiency of construction is high. This patent construction is simple and convenient, and the construction step is few, and is efficient, has avoided the on-the-spot formwork and the reinforcement work of traditional steel pipe concrete composite column, can improve on-the-spot operating efficiency greatly, saves construction period.

4) The hoisting is convenient, and the connection is simple and convenient. The concrete in the steel pipe is cast later on site, so that the weight of the prefabricated part is greatly reduced, and the on-site hoisting is convenient; the inner steel pipe in the prefabricated part is connected through the flange and the reinforcing steel bar is connected through machinery, so that the on-site connection is simple and convenient, and the efficiency is high.

5) Wide application range and good economic benefit. The method can be suitable for building types such as industrial plants, public buildings, steel structure houses and the like, and has wide application range; meanwhile, the structure has good durability and does not need maintenance in the service life; the combined action of the high-strength material and the steel-concrete is fully utilized, so that the structure has good stress performance and good economic benefit.

Example 4

This example is substantially the same as example 3, except that:

as shown in fig. 17, the column longitudinal rib 140 is a column inner angle steel 141. More preferably, the in-column angle 141 is an equilateral angle. So as to facilitate the vertical splicing of the upper and lower section superposed columns 100. As shown in fig. 18, the external concrete layer 130 is provided with a post-cast section 131 at one end or both ends of the in-column steel pipe 110 (i.e., the composite column 100); a connecting hole is reserved on the exposed part of the post-cast section of the post inner angle steel 141; when two adjacent sections of superposed columns 100 are butted, the steel pipes 110 are fixedly connected through the connecting flange 112; after the upper and lower inner angle bars 141 are butted, the upper and lower butted inner angle bars 141 are fixedly connected by the connecting angle 143 and the bolt.

The butt joint of the post with ordinary reinforcing bar form relatively utilizes angle connector to strengthen the connection position, and the angle connector in the post is connected more firmly, and intensity is higher, and efficiency is higher.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims (10)

1. A floor slab through-type steel-concrete combined flat beam floor structure is characterized by comprising: floor and steel beams; the steel beam is hidden in the height range of the floor system;

the floor comprises a concrete precast slab and an existing structural layer; the steel beam comprises an upper flange, a lower flange and a web plate; the end part of the concrete precast slab comprises a lap joint part which is lapped on the lower flange; the existing structural layer is laid above the concrete precast slab, and the upper flange is embedded in the existing structural layer.

2. The floor deck structure of claim 1, wherein the concrete slab is provided with a gap for overlapping and receiving a steel beam lower flange below the overlapping portion, the gap having a height greater than a thickness of the lower flange for covering the lower flange in a height direction.

3. The floor deck of claim 2, wherein said gap is rectangular; the width of the notch is 25-55 mm; the height of the notch is the thickness of the lower flange of the steel beam plus 20-30 mm.

4. The floor deck floor structure of claim 2, further comprising anti-cracking reinforcing steel; one part of the anti-cracking reinforcing steel bars is arranged on the upper side of the gap and in the overlapping part of the concrete precast slab, and the other part of the anti-cracking reinforcing steel bars extends into the non-overlapping part of the concrete precast slab to prevent the overlapping part from cracking.

5. The floor slab underslung steel-concrete composite flat beam floor structure according to claim 1, wherein said steel beams are unequal flange steel beams, and said lower flange is wider than said upper flange by 40-100 mm so as to facilitate the placement of said concrete precast slab.

6. The floor slab underslung steel-concrete composite flat beam floor system structure according to claim 1, wherein holes are formed in the web at intervals for penetrating through the perforated steel bars and the ground heating layer pipeline, and the concrete on both sides of the web is penetrated through, so that the structural integrity is improved.

7. The floor slab underslung steel-concrete composite flat beam floor structure according to claim 1, wherein said steel beams are iso-flange steel beams, and said upper flange is provided with a notch for said lap joint to be inserted from outside through the notch between the upper flange and the lower flange and finally lap-jointed on said lower flange.

8. The floor deck floor-bottom-supported steel-concrete composite flat beam floor structure according to claim 7, further comprising reinforcing rib plates for covering the openings and reinforcing the openings; and after the concrete precast slab is installed, covering the reinforced rib plate on the opening, and fixedly connecting two ends of the reinforced rib plate with two side edges of the opening of the upper flange through bolts.

9. The floor deck of claim 1, wherein the existing structure layer comprises a lightweight filling layer and a cast-in-place concrete layer from bottom to top, and the lightweight filling layer is made of lightweight filling materials.

10. The floor deck floor slab underslung steel-concrete composite flat beam floor system structure of claim 9, wherein said existing structure layer further comprises a lower insulating layer, a ground heating layer, an upper insulating layer and a building surface layer which are sequentially arranged above said existing cast concrete layer.

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