CN114164940A - Low multilayer exempts from to support assembled ultra high performance concrete frame structure and building - Google Patents
Low multilayer exempts from to support assembled ultra high performance concrete frame structure and building Download PDFInfo
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- CN114164940A CN114164940A CN202111425344.3A CN202111425344A CN114164940A CN 114164940 A CN114164940 A CN 114164940A CN 202111425344 A CN202111425344 A CN 202111425344A CN 114164940 A CN114164940 A CN 114164940A
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/20—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of concrete, e.g. reinforced concrete, or other stonelike material
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/20—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of concrete, e.g. reinforced concrete, or other stonelike material
- E04B1/21—Connections specially adapted therefor
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/14—Conveying or assembling building elements
- E04G21/16—Tools or apparatus
- E04G21/18—Adjusting tools; Templates
- E04G21/1841—Means for positioning building parts or elements
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Abstract
The application provides a support assembled ultra high performance concrete frame structure and building are exempted from to low multilayer relates to assembled structure building field. The method comprises the following steps: the side surface of the prefabricated frame column is provided with a cantilever beam, and the extending end part of the steel bar in the cantilever beam extends towards the direction far away from the end part to form a first lap joint steel bar; the extending end part of the steel bar in the prefabricated frame beam extends to the direction far away from the end part to form a second lap joint steel bar; the connecting and supporting device is in an inverted double-T-shaped steel plate form, and two ends of the connecting and supporting device are detachably connected with the end part of the cantilever beam and one end of the prefabricated frame beam respectively to form a pouring groove with an opening at the top; the two ends of the temporary inclined strut are respectively detachably connected with the prefabricated frame column and the connecting and supporting device; the first overlap joint reinforcing bar and the second overlap joint reinforcing bar are all arranged in the pouring groove and overlapped. When the low-multilayer support-free assembled type ultrahigh-performance concrete frame structure is constructed, temporary supports are not arranged below the beams and the plates, a template is not required to be arranged, construction measure cost can be reduced, and construction efficiency is improved.
Description
Technical Field
The application relates to the field of fabricated structure buildings, in particular to a low-rise support-free fabricated ultrahigh-performance concrete frame structure and a building.
Background
At present, the technology of the assembled integral concrete structure based on sleeve grouting connection and post-cast node connection in the assembled building is mature, wherein the assembled integral concrete frame structure is widely applied to civil public buildings and industrial buildings.
The stress performance of the assembled integral concrete frame structure is equal to that of a cast-in-place concrete frame structure, the anti-seismic performance is good, but beam-column joints are in a post-pouring form, beams and plates generally adopt a superposition form, so that on-site wet operation is more, more temporary supports are required to be arranged under the beams and the plates during construction, the industrialization level of the structure system is still low, the adverse effect on the environment is larger, and the advantages of the assembled structure cannot be fully exerted. The above problem is more pronounced especially for low-layer structures having no more than 3 layers and multilayer structures having no more than 6 layers.
Therefore, further solution to the above technical problems is needed.
Disclosure of Invention
The invention mainly aims to provide a low-rise support-free assembled type ultrahigh-performance concrete frame structure and a building, and solve the technical problems.
In order to solve the above technical problem, an embodiment of the present application provides the following technical solutions:
on the one hand this application provides a support assembled ultra high performance concrete frame structure is exempted from to low multilayer, includes: the side surface of the prefabricated frame column is provided with a cantilever beam, and the extending end part of a steel bar in the cantilever beam extends towards the direction far away from the end part to form a first lap joint steel bar;
the steel bar extending end part in the prefabricated frame beam extends towards the direction far away from the end part to form a second lap joint steel bar;
the connecting and supporting device is in an inverted double-T-shaped steel plate form, and two ends of the connecting and supporting device are detachably connected with the end part of the cantilever beam and one end of the prefabricated frame beam respectively to form a pouring groove with an opening at the top;
the two ends of the temporary inclined strut are detachably connected with the prefabricated frame column and one end, close to the prefabricated frame beam, of the connecting and supporting device respectively;
the first overlap-joint reinforcing steel bars and the second overlap-joint reinforcing steel bars are arranged in the pouring grooves and overlapped, and the prefabricated frame columns and the prefabricated frame beams are connected into a whole by pouring ultrahigh-performance concrete into the pouring grooves.
The object of the invention can be further achieved by the following technical measures.
Optionally, the aforementioned low multi-layer support-free fabricated ultra high performance concrete frame structure, wherein an end of the first overlap reinforcement is bent in a hook shape, and an end of the second overlap reinforcement is bent in a hook shape.
Optionally, in the aforementioned low-multi-layer support-free fabricated ultrahigh-performance concrete frame structure, the overlapping length of the first overlapping steel bar and the second overlapping steel bar is 1.0 times the steel bar anchoring length.
Optionally, in the aforementioned low-multi-layer support-free fabricated ultrahigh-performance concrete frame structure, a stirrup is disposed in an overlapping range of the first overlapping steel bar and the second overlapping steel bar.
Optionally, the aforementioned low multi-story support-free fabricated ultra-high performance concrete frame structure, wherein the connection support means comprises:
the double-T-shaped structure comprises a bottom plate and two side plates which are vertically connected to the bottom plate at intervals to form the inverted double-T shape, and stiffening ribs are arranged between the bottom plate and the side plates;
the net distance between the two side plates is equal to the width of the cross section of the prefabricated frame beam, and the two ends of the side plates in the length direction are respectively connected with the end part of the cantilever beam and one end of the prefabricated frame beam.
Optionally, in the aforementioned low-multilayer support-free fabricated ultrahigh-performance concrete frame structure, one end of the side plate connected to the cantilever beam is a first end, and one end of the side plate connected to the precast frame beam is a second end, where the first end and the second end of the side plate are both provided with a plurality of bolt holes, and the bolt holes of the first end are arranged in two rows, and the bolt holes of the second end are arranged in one row;
nuts corresponding to bolt holes at two ends of the side plate are respectively embedded in the side surface of the end part of the cantilever beam and the side surface of one end of the prefabricated frame beam;
the side plate is connected with a nut on the side face of the end part of the cantilever beam through a bolt, and is connected with a nut on the side face of one end of the prefabricated frame beam.
Optionally, in the aforementioned low-multi-layer support-free fabricated ultrahigh-performance concrete frame structure, a cross-sectional width and a height of the cantilever beam are the same as those of the prefabricated frame beam, and a length of the cantilever beam is greater than or equal to 0.5 times a cross-sectional height and a larger value of 300 mm.
Optionally, one end of the temporary inclined strut is detachably connected with the prefabricated frame column through a first T-shaped connecting piece, and the first T-shaped connecting piece and the prefabricated frame column are connected and fixed in advance through bolts;
the other end of the temporary inclined strut is connected with the bottom of one end, close to the prefabricated frame beam, of the connecting and supporting device through a second T-shaped connecting piece, and the second T-shaped connecting piece is welded and fixed with the connecting and supporting device in advance;
the temporary inclined strut is connected with the first T-shaped connecting piece and the second T-shaped connecting piece through bolts.
Optionally, the aforementioned low-multi-layer support-free fabricated ultrahigh-performance concrete frame structure further includes:
the prefabricated floor slab is placed above the prefabricated frame beam and the cantilever beam, and a gap is reserved between the prefabricated floor slabs on two sides of the prefabricated frame beam and the cantilever beam to form a pouring zone; the prefabricated frame beam and the adjacent prefabricated floor slabs on the same side of the cantilever beam form a splicing seam; annular reinforcing steel bars extend out of the positions of the pouring belts, above the prefabricated frame beam and the cantilever beam; annular tie bars are arranged in the abutted seams along the length direction;
and the pouring belt and the abutted seams are used for pouring concrete.
In another aspect, the present application provides a building comprising:
the low-multilayer support-free assembled ultrahigh-performance concrete frame structure is characterized in that a support-free assembled ultrahigh-performance concrete frame structure is formed;
support assembled ultra high performance concrete frame structure is exempted from to low multilayer includes: the side surface of the prefabricated frame column is provided with a cantilever beam, and the extending end part of a steel bar in the cantilever beam extends towards the direction far away from the end part to form a first lap joint steel bar;
the steel bar extending end part in the prefabricated frame beam extends towards the direction far away from the end part to form a second lap joint steel bar;
the connecting and supporting device is in an inverted double-T-shaped steel plate form, and two ends of the connecting and supporting device are detachably connected with the end part of the cantilever beam and one end of the prefabricated frame beam respectively to form a pouring groove with an opening at the top;
the two ends of the temporary inclined strut are detachably connected with the prefabricated frame column and one end, close to the prefabricated frame beam, of the connecting and supporting device respectively;
the first overlap-joint reinforcing steel bars and the second overlap-joint reinforcing steel bars are arranged in a pouring groove, and the prefabricated frame columns and the prefabricated frame beams are connected into a whole by pouring ultrahigh-performance concrete into the pouring groove.
By the technical scheme, the low-multilayer support-free assembled type ultrahigh-performance concrete frame structure and the building have at least the following advantages:
firstly, a cantilever beam is preset on the side wall of a prefabricated frame column, reinforcing steel bars are extended from the end part of the cantilever beam and reinforcing steel bars are extended from the end part of the prefabricated frame beam, and the prefabricated frame column and the prefabricated frame beam can be temporarily connected and fixed by the connecting and supporting device and the temporary inclined strut to form a temporary frame structure and simultaneously form a pouring groove; the temporary frame structure can bear load and support the prefabricated floor slab when the pouring groove is not poured; therefore, during construction, temporary supports and templates do not need to be arranged below the beams and the plates, so that the construction measures can be reduced on the whole, the construction cost is reduced, and the construction efficiency is improved;
secondly, the cantilever beam and the prefabricated frame beam which are carried by the prefabricated frame column are lapped in the pouring groove through the first lapping steel bar and the second lapping steel bar, and are connected in a mode of pouring the ultra-high performance concrete in the pouring groove, a temporary support and a template are not needed to be arranged in a connecting area, the advantage of short lapping length of the steel bars in the ultra-high performance concrete can be fully played, and the wet operation amount is reduced;
and finally, the prefabricated frame columns and the prefabricated frame beams are prefabricated by adopting ultra-high performance concrete, so that compared with the common concrete, the material consumption can be reduced, the self weight of the structure is reduced, the space utilization area is increased, the durability of the structure is effectively improved, and the energy-saving and carbon-reducing effects are good.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.
Drawings
The above and other objects, features and advantages of exemplary embodiments of the present application will become readily apparent from the following detailed description read in conjunction with the accompanying drawings. Several embodiments of the present application are illustrated by way of example and not by way of limitation in the figures of the accompanying drawings and in which like reference numerals refer to similar or corresponding parts and in which:
fig. 1 schematically shows a structural view of a low multi-story support-free fabricated ultra-high performance concrete frame structure;
FIG. 2 schematically illustrates a structural view of a prefabricated frame column of a low multi-story support-free fabricated ultra-high performance concrete frame structure;
fig. 3 is a schematic view illustrating a structure of a connection supporting device of a low multi-story support-free fabricated ultra-high performance concrete frame structure;
fig. 4 schematically shows a structural diagram of a low-rise support-free fabricated ultra-high performance concrete frame structure provided with a precast floor slab.
The reference numerals in fig. 1-4 are:
prefabricated frame post 1, cantilever beam 11, first overlap joint reinforcing bar 111, prefabricated frame roof beam 2, second overlap joint reinforcing bar 21, connection supporting device 3, pouring groove 31, bottom plate 32, curb plate 33, stiffening rib 34, bolt hole 35, floor 4, annular reinforcing bar 5, cyclic annular drawknot reinforcing bar 6, pouring area 7, piece 8, interim bracing 9, first T connecting piece 91.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which this application belongs.
Example one
As shown in fig. 1 to 3, an embodiment of the present invention provides a low-rise support-free fabricated ultra-high performance concrete frame structure, including: the prefabricated frame column comprises a prefabricated frame column 1, a prefabricated frame beam 2, a connecting and supporting device 3 and a temporary inclined strut 9;
the prefabricated frame column 1 is prefabricated by adopting ultra-high performance concrete, a cantilever beam 11 is arranged on the side surface, and the extending end part of a steel bar in the cantilever beam 11 extends towards the direction far away from the end part to form a first lap joint steel bar 111; the prefabricated frame beam 2 is prefabricated by adopting ultra-high performance concrete, and the extending end part of the internal steel bar extends to the direction far away from the end part to form a second lap joint steel bar 21; the connecting and supporting device 3 is in the form of an inverted double-T-shaped steel plate, and two ends of the connecting and supporting device are detachably connected with the end part of the cantilever beam 11 and one end of the prefabricated frame beam 2 respectively to form a pouring groove 31 with an open top; the temporary inclined strut 9 is arranged between the prefabricated frame column 1 and the connecting and supporting device 3, and two ends of the temporary inclined strut are respectively detachably connected with the prefabricated frame column 1 and one end of the connecting and supporting device 3 close to the prefabricated frame beam 2;
during construction, the connecting and supporting device 3 is connected and fixed with the prefabricated frame column 1 in advance; then installing and fixing the prefabricated frame column 1; then, mounting the prefabricated frame beam 2, and connecting and fixing the temporary support 9 with the prefabricated frame column 1 and the connecting and supporting device 3; finally, the floor slab 4 is installed; the first overlap steel bars 111 and the second overlap steel bars 21 are placed in a pouring groove 31 to form an overlap relation, and ultrahigh-performance concrete is poured into the pouring groove 31 to connect the prefabricated frame column 1 and the prefabricated frame beam 2 into a whole; and after construction is finished, the connecting and supporting device 3 and the temporary inclined strut 9 are removed.
Specifically, the Ultra-High Performance Concrete, abbreviated as UHPC (Ultra-High Performance Concrete), has Ultra-High durability and Ultra-High mechanical properties, is the most innovative cement-based engineering material in the last thirty years, is also a material known by the skilled person, and is not described herein again.
The height of the prefabricated frame column 1 needs to be set according to the requirements of buildings, and for the embodiment of the invention, when the number of structural layers is not more than 3, the prefabricated frame column 1 is prefabricated by adopting the integral through height; when the number of structural layers is greater than 3 layers, prefabricated frame post 1 can be prefabricated for one section by 2 ~ 3 layers, and upper and lower section prefabricated frame post adopts modes such as mechanical connection or sleeve grout connection, and reliably fixes through measures such as adjustable support. The prefabricated frame column 1 and the foundation or the basement are connected by mechanical connection, sleeve grouting connection or plug-in type cup foundation and are reliably fixed by measures such as adjustable support and the like. A plurality of cantilever beams 11 may be provided on a plurality of sides of the prefabricated frame column 1 at the same height position so as to be able to connect a plurality of prefabricated frame beams 2 to be combined to form a frame structure of a building.
The cantilever beam 11 has the same cross section as the prefabricated frame beam 2, i.e. the same cross sectional size and shape, and the cantilever beam 11 is prefabricated integrally with the prefabricated frame column 1. The reinforcing steel bars extending out of the end parts of the cantilever beams 11 are continuous with the internal reinforcing steel bars and are used for being lapped with the reinforcing steel bars extending out of the end parts of the prefabricated frame beams 2.
The prefabricated frame beam 2 needs to adopt a proper size according to the needs of a building, and the two ends of the prefabricated frame beam 2 can be respectively provided with an extended reinforcing steel bar, namely a second lap reinforcing steel bar 21.
The connection support device 3 needs to have certain rigidity and strength to ensure that the cantilever beam 11 and the prefabricated frame beam 2 can be stably and temporarily connected together, thereby bearing construction load and supporting the floor slab 4. The connecting and supporting device 3 is formed by welding steel plates and is connected with the cantilever beam 11 and the prefabricated frame beam 2 through bolts.
The temporary inclined strut 9 is in a channel steel or angle steel form, one end of the temporary inclined strut is detachably connected with the prefabricated frame column 1 through a first T-shaped connecting piece 91, the first T-shaped connecting piece 91 is fixedly connected with the prefabricated frame column 1 through a bolt in advance, and the temporary inclined strut 9 is connected with the first T-shaped connecting piece 91 through a bolt on site; the other end of the temporary inclined strut 9 is connected with one end of the connecting and supporting device 3 close to the prefabricated frame beam 2 through a second T-shaped connecting piece (the structure is the same as that of the first T-shaped connecting piece 91, and the second T-shaped connecting piece is not shown in the figure), the second T-shaped connecting piece is welded and fixed with the connecting and supporting device 3 in advance, and the temporary inclined strut 9 and the second T-shaped connecting piece are connected through bolts on site.
During construction, the connecting and supporting device 3 is fixed to the cantilever beam 11 in advance in a mode that bolts are screwed into nuts, then the prefabricated frame beam 2 is hoisted, and after the prefabricated frame beam 2 is hoisted into the connecting and supporting device 31, the connecting and supporting device and the end part of the prefabricated frame beam 2 are fixed in a mode that the bolts are screwed into nuts. At the moment, the prefabricated frame beam 2 and the prefabricated frame column 1 can form a temporary frame structure, and the prefabricated frame beam 2 and the prefabricated frame column 1 are hinged. When the span of the prefabricated frame beam 2 is large, a temporary inclined strut 9 can be arranged between the prefabricated frame column 1 and the connecting and supporting device 3 according to the stress calculation requirement, the temporary inclined strut 9 is installed after the connecting and supporting device 3 is fixed with the end part of the prefabricated frame beam 2, and the temporary inclined strut 9, a first T-shaped connecting plate which is fixed on the prefabricated frame column 1 in advance through bolts and a second T-shaped connecting plate which is fixed on the connecting and supporting device 3 in advance in a welding mode are connected through bolts on site. After the prefabricated frame beam 2 is installed and connected, the floor slab 4 can be hoisted, and the floor slab 4 is placed on the prefabricated frame beam 2 and the cantilever beam 11. And finally, pouring ultrahigh-performance concrete into the pouring groove 31, and pouring common concrete into the pouring belts and the abutted seams between the adjacent floor slabs 4.
According to the embodiment of the invention, the cantilever beam is preset on the side wall of the prefabricated frame column, the reinforcing steel bars are extended from the end part of the cantilever beam and the reinforcing steel bars are extended from the end part of the prefabricated frame beam, and the connecting and supporting device can temporarily connect and fix the cantilever beam and the prefabricated frame beam to form a temporary frame structure and simultaneously form a pouring groove; for the condition that the span of the prefabricated frame beam is large, a temporary inclined strut can be arranged between the prefabricated frame column and the connecting and supporting device according to the stress calculation requirement, so that the integrity and the stability of the temporary frame structure are further improved; the formed temporary frame structure can bear construction load and support the prefabricated floor slab when the pouring groove is not poured; therefore, during construction, temporary supports and templates do not need to be arranged below the beams and the plates, so that the construction measures can be reduced on the whole, the construction cost is reduced, and the construction efficiency is improved; the cantilever beam and the prefabricated frame beam which are carried by the prefabricated frame column are lapped in the pouring groove through the first lapping steel bar and the second lapping steel bar, and are connected in a mode of pouring the ultra-high performance concrete into the pouring groove, a temporary support and a template are not required to be arranged in a connecting area, the advantage of short lapping length of the steel bars in the ultra-high performance concrete can be fully exerted, and the wet operation amount is reduced; the prefabricated frame column and the prefabricated frame beam are both prefabricated by adopting ultra-high performance concrete, and compared with common concrete, the prefabricated frame column and the prefabricated frame beam can reduce the material consumption, lighten the self weight of the structure, increase the space using area, effectively improve the durability of the structure and have good energy-saving and carbon-reducing effects.
As shown in fig. 1 to 3, in an embodiment in which the overlapping length of the first and second overlapping bars 111 and 21 is determined by the diameter and end configuration of the overlapping bars, it is preferable that the end of the first overlapping bar 111 is bent in a hook shape and the end of the second overlapping bar 21 is bent in a hook shape, and the overlapping length may be 1.0 times the anchoring length of the bars. In addition, the overlap joint scope need set up the stirrup, and the length of pouring groove 31 needs to be greater than reinforcing bar overlap joint length, guarantees that 11 sections of overhanging reinforcing bar tip of cantilever beam and 2 terminal surfaces of prefabricated frame roof beam, 2 overhanging reinforcing bar tip of prefabricated frame roof beam and 11 section of terminal surfaces of cantilever beam between the clearance satisfies the requirement of construction installation deviation and installation stirrup.
In a specific implementation, wherein said connection support means 3 comprise: a bottom plate 32 and two side plates 33 connected to the bottom plate 32 at intervals to form the inverted double-T shape, and a stiffening rib 34 is arranged between the bottom plate 32 and the side plates 33;
the clear distance between the two side plates 33 is equal to the width of the cross section of the prefabricated frame beam 2, two ends of each side plate 33 are respectively connected with the end part of the cantilever beam 11 and one end of the prefabricated frame beam 2, and the bottom plate 32, the side plates 33, the end parts of the cantilever beams 11 and the end parts of the prefabricated frame beams 2 are enclosed to form a pouring groove 31.
Further, one end of the side plate 33 connected with the cantilever beam 11 is a first end, one end connected with the prefabricated frame beam 2 is a second end, the first end and the second end of the side plate 33 are both provided with a plurality of bolt holes 35, the bolt holes 35 at the first end are arranged in two rows, and the bolt holes at the second end are arranged in one row;
nuts corresponding to bolt holes 35 on two sides of a side plate 33 are respectively embedded in the side surface of the end part of the cantilever beam 11 and the side surface of one end of the prefabricated frame beam 2; the side plate 33 is connected with a nut on the side surface of the end part of the cantilever beam 11 and a nut on the side surface of one end of the precast frame beam 2 through a bolt.
In the concrete implementation, the section width and the height of the cantilever beam 11 are the same as those of the prefabricated frame beam 2, and the length is more than or equal to 0.5 times of the section height and the larger value of 300 mm. The connection length of the connection supporting device 3 and the cantilever beam 11 is determined by bolt connection calculation and is not less than 150 mm. The length of the connection support 3 to the precast frame beam 2, i.e., the length of the lay-up of the precast frame beam 2, needs to be determined by calculation and is not less than 100 mm.
As shown in fig. 4, in a specific implementation, the method further includes: the prefabricated floor slab is characterized in that the prefabricated floor slab 4 is placed above the prefabricated frame beam 2 and the cantilever beam 11, and a gap is reserved between the prefabricated floor slabs on two sides of the prefabricated frame beam 2 and the cantilever beam 11 to form a pouring belt 7; a splicing seam 8 is formed between adjacent prefabricated floor slabs on the same side of the prefabricated frame beam 2 and the cantilever beam 11; annular reinforcing steel bars 5 extend out of the positions of the pouring belts 7 above the prefabricated frame beams 2 and the cantilever beams 11; annular tie bars 6 are arranged in the abutted seams 8 along the length direction; wherein, the pouring belt 7 and the abutted seam 8 are both used for pouring common concrete.
Specifically, the floor slab 4 can be a prefabricated prestressed concrete hollow slab, is made of common concrete and prestressed steel strands, and can achieve the purpose of large span and no support in the construction stage through design.
Example two
An embodiment of the present invention provides a building, including:
as shown in fig. 1-3, a low multi-layer support-free fabricated ultra-high performance concrete frame structure;
support assembled ultra high performance concrete frame structure is exempted from to low multilayer includes:
the prefabricated frame column comprises a prefabricated frame column 1, a prefabricated frame beam 2, a connecting and supporting device 3 and a temporary inclined strut 9;
the prefabricated frame column 1 is prefabricated by adopting ultra-high performance concrete, a cantilever beam 11 is arranged on the side surface, and the extending end part of a steel bar in the cantilever beam 11 extends towards the direction far away from the end part to form a first lap joint steel bar 111; the prefabricated frame beam 2 is prefabricated by adopting ultra-high performance concrete, and the extending end part of the internal steel bar extends to the direction far away from the end part to form a second lap joint steel bar 21; the connecting and supporting device 3 is in the form of an inverted double-T-shaped steel plate, and two ends of the connecting and supporting device are detachably connected with the end part of the cantilever beam 11 and one end of the prefabricated frame beam 2 respectively to form a pouring groove 31 with an open top; the temporary inclined strut 9 is arranged between the prefabricated frame column 1 and the connecting and supporting device 3, and two ends of the temporary inclined strut are respectively detachably connected with the prefabricated frame column 1 and one end of the connecting and supporting device 3 close to the prefabricated frame beam 2;
during construction, the connecting and supporting device 3 is connected and fixed with the prefabricated frame column 1 in advance; then installing and fixing the prefabricated frame column 1; then, mounting the prefabricated frame beam 2, and connecting and fixing the temporary support 9 with the prefabricated frame column 1 and the connecting and supporting device 3; finally, the floor slab 4 is installed; the first overlap steel bars 111 and the second overlap steel bars 21 are placed in a pouring groove 31 to form an overlap relation, and ultrahigh-performance concrete is poured into the pouring groove 31 to connect the prefabricated frame column 1 and the prefabricated frame beam 2 into a whole; and after construction is finished, the connecting and supporting device 3 and the temporary inclined strut 9 are removed.
Specifically, the low-multilayer support-free fabricated ultrahigh-performance concrete frame structure described in the second embodiment may directly use the low-multilayer support-free fabricated ultrahigh-performance concrete frame structure provided in the first embodiment, and the specific implementation structure may refer to the relevant contents described in the first embodiment, and is not described herein again.
The building provided by the embodiment of the invention uses the low-multilayer support-free assembled type ultrahigh-performance concrete frame structure, the structure is characterized in that a cantilever beam is preset on the side wall of a prefabricated frame column, a reinforcing steel bar extends from the end part of the cantilever beam and a reinforcing steel bar extends from the end part of a prefabricated frame beam, and a connecting and supporting device can temporarily connect and fix the cantilever beam and the prefabricated frame beam to form a temporary frame structure and simultaneously form a pouring groove; for the condition that the span of the prefabricated frame beam is large, a temporary inclined strut can be arranged between the prefabricated frame column and the connecting and supporting device according to the stress calculation requirement, so that the integrity and the stability of the temporary frame structure are further improved; the formed temporary frame structure can bear construction load and support the prefabricated floor slab when the pouring groove is not poured; therefore, during construction, temporary supports and templates do not need to be arranged below the beams and the plates, so that the construction measures can be reduced on the whole, the construction cost is reduced, and the construction efficiency is improved; the cantilever beam and the prefabricated frame beam which are carried by the prefabricated frame column are lapped in the pouring groove through the first lapping steel bar and the second lapping steel bar, and are connected in a mode of pouring the ultra-high performance concrete into the pouring groove, a temporary support and a template are not required to be arranged in a connecting area, the advantage of short lapping length of the steel bars in the ultra-high performance concrete can be fully exerted, and the wet operation amount is reduced; the prefabricated frame column and the prefabricated frame beam are both prefabricated by adopting ultra-high performance concrete, and compared with common concrete, the prefabricated frame column and the prefabricated frame beam can reduce the material consumption, lighten the self weight of the structure, increase the space using area, effectively improve the durability of the structure and have good energy-saving and carbon-reducing effects.
It will be appreciated that the relevant features of the devices described above may be referred to one another. In addition, "first", "second", and the like in the above embodiments are for distinguishing the embodiments, and do not represent merits of the embodiments.
In the description provided herein, numerous specific details are set forth. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known structures and techniques have not been shown in detail in order not to obscure an understanding of this description.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (10)
1. The utility model provides a support assembled ultra high performance concrete frame structure is exempted from to low multilayer which characterized in that includes:
the side surface of the prefabricated frame column is provided with a cantilever beam, and the extending end part of a steel bar in the cantilever beam extends towards the direction far away from the end part to form a first lap joint steel bar;
the steel bar extending end part in the prefabricated frame beam extends towards the direction far away from the end part to form a second lap joint steel bar;
the connecting and supporting device is in an inverted double-T-shaped steel plate form, and two ends of the connecting and supporting device are detachably connected with the end part of the cantilever beam and one end of the prefabricated frame beam respectively to form a pouring groove with an opening at the top;
the two ends of the temporary inclined strut are detachably connected with the prefabricated frame column and one end, close to the prefabricated frame beam, of the connecting and supporting device respectively;
the first overlap-joint reinforcing steel bars and the second overlap-joint reinforcing steel bars are arranged in the pouring grooves and overlapped, and the prefabricated frame columns and the prefabricated frame beams are connected into a whole by pouring ultrahigh-performance concrete into the pouring grooves.
2. The low multi-story support-free fabricated ultra-high performance concrete frame structure of claim 1,
the end of the first overlap steel bar is bent to be hook-shaped, and the end of the second overlap steel bar is bent to be hook-shaped.
3. The low multi-story support-free fabricated ultra-high performance concrete frame structure of claim 2,
the lap length of the first lap-joint reinforcing steel bar and the second lap-joint reinforcing steel bar is 1.0 times of the anchoring length of the reinforcing steel bars.
4. The low multi-story support-free fabricated ultra-high performance concrete frame structure of claim 2,
and stirrups are arranged in the lap joint range of the first lap joint reinforcing steel bars and the second lap joint reinforcing steel bars.
5. The low multi-story support-free fabricated ultra-high performance concrete frame structure of claim 1, wherein the connection supporting means comprises:
the double-T-shaped structure comprises a bottom plate and two side plates which are vertically connected to the bottom plate at intervals to form the inverted double-T shape, and stiffening ribs are arranged between the bottom plate and the side plates;
the net distance between the two side plates is equal to the width of the cross section of the prefabricated frame beam, and the two ends of the side plates in the length direction are respectively connected with the end part of the cantilever beam and one end of the prefabricated frame beam.
6. The low multi-story support-free fabricated ultra-high performance concrete frame structure of claim 5,
the side plate is connected with the cantilever beam through a first bolt hole, the side plate is connected with the precast frame beam through a second bolt hole, the first end and the second end of the side plate are both provided with a plurality of bolt holes, the bolt holes of the first end are arranged in two rows, and the bolt holes of the second end are arranged in one row;
nuts corresponding to bolt holes at two ends of the side plate are respectively embedded in the side surface of the end part of the cantilever beam and the side surface of one end of the prefabricated frame beam;
the side plate is connected with a nut on the side face of the end part of the cantilever beam through a bolt, and is connected with a nut on the side face of one end of the prefabricated frame beam.
7. The low multi-story support-free fabricated ultra-high performance concrete frame structure of claim 1,
the width and the height of the cross section of the cantilever beam are the same as those of the prefabricated frame beam, and the length of the cantilever beam is more than or equal to 0.5 times of the height of the cross section and a larger value of 300 mm.
8. The low multi-story support-free fabricated ultra-high performance concrete frame structure of claim 1,
one end of the temporary inclined strut is detachably connected with the prefabricated frame column through a first T-shaped connecting piece, and the first T-shaped connecting piece and the prefabricated frame column are fixedly connected in advance through bolts;
the other end of the temporary inclined strut is connected with the bottom of one end, close to the prefabricated frame beam, of the connecting and supporting device through a second T-shaped connecting piece, and the second T-shaped connecting piece is welded and fixed with the connecting and supporting device in advance;
the temporary inclined strut is connected with the first T-shaped connecting piece and the second T-shaped connecting piece through bolts.
9. The low multi-story support-free fabricated ultra-high performance concrete frame structure of claim 1, further comprising:
the prefabricated floor slab is placed above the prefabricated frame beam and the cantilever beam, and a gap is reserved between the prefabricated floor slabs on two sides of the prefabricated frame beam and the cantilever beam to form a pouring zone; the prefabricated frame beam and the adjacent prefabricated floor slabs on the same side of the cantilever beam form a splicing seam; annular reinforcing steel bars extend out of the positions of the pouring belts, above the prefabricated frame beam and the cantilever beam; annular tie bars are arranged in the abutted seams along the length direction;
and the pouring belt and the abutted seams are used for pouring concrete.
10. A building, comprising:
the low multi-storey support-free assembled ultra-high performance concrete frame structure of any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111425344.3A CN114164940A (en) | 2021-11-26 | 2021-11-26 | Low multilayer exempts from to support assembled ultra high performance concrete frame structure and building |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111425344.3A CN114164940A (en) | 2021-11-26 | 2021-11-26 | Low multilayer exempts from to support assembled ultra high performance concrete frame structure and building |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114164940A true CN114164940A (en) | 2022-03-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111425344.3A Pending CN114164940A (en) | 2021-11-26 | 2021-11-26 | Low multilayer exempts from to support assembled ultra high performance concrete frame structure and building |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114164940A (en) |
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2021
- 2021-11-26 CN CN202111425344.3A patent/CN114164940A/en active Pending
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