CN109252622B - Prefabricated bottom plate assembly of composite beam and composite beam - Google Patents
Prefabricated bottom plate assembly of composite beam and composite beam Download PDFInfo
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- CN109252622B CN109252622B CN201811124869.1A CN201811124869A CN109252622B CN 109252622 B CN109252622 B CN 109252622B CN 201811124869 A CN201811124869 A CN 201811124869A CN 109252622 B CN109252622 B CN 109252622B
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/38—Arched girders or portal frames
- E04C3/44—Arched girders or portal frames of concrete or other stone-like material, e.g. with reinforcements or tensioning members
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Abstract
The invention discloses a composite beam prefabricated bottom plate assembly and a composite beam, relates to the field of building structures, and solves the problems of complicated construction, prolonged construction period and high manufacturing cost of the existing composite beam, and adopts the technical scheme that: the composite beam prefabricated bottom plate assembly comprises a prefabricated bottom plate and a supporting piece, wherein a connecting piece is embedded in the prefabricated bottom plate, and the supporting piece is detachably connected to the lower side or the inner side of the prefabricated bottom plate; the prefabricated bottom plate is internally provided with a reinforcement which comprises a stirrup and a longitudinal reinforcement, wherein the stirrup comprises an embedded part embedded in the prefabricated bottom plate and an exposed part exposed out of the upper side or the outer side of the prefabricated bottom plate. The prefabricated bottom plate is a prefabricated arched bottom plate or a prefabricated flat beam, and the outer side surface or the upper surface of the prefabricated bottom plate is poured with a concrete superposed layer and connected in a shearing-resistant manner, so that the superposed beam is obtained. The invention not only has no need of mould construction, but also has no need of support, and can reduce engineering quantity, shorten construction period and save cost. The prefabricated bottom plate can be made thinner, the bending resistance of the prefabricated bottom plate in the construction stage can be adjusted, the types are reduced, and the development of the fabricated building is promoted.
Description
Technical Field
The invention relates to the technical field of building structures, in particular to a superposed beam of an assembly type building.
Background
The beams can be divided into straight beams and curved beams according to the shape of the axis, and the curved beams are mainly arched beams. The existing arched beam is generally directly cast in site, a formwork is required to be erected, the process is complicated, and the construction period is prolonged.
The composite beam comprises a precast beam and a cast-in-place part. When the existing superposed straight beam construction is carried out, the two ends of the precast beam are firstly erected on the two columns, and then the cast-in-place part is directly poured on the upper part of the precast beam. When the span of the precast beam is large, the precast beam is easily damaged during pouring by independently depending on the support of the precast composite beam, and the quality of the composite beam is influenced. Therefore, due to the limitation of the stress mode of the precast beam, a temporary supporting device needs to be arranged on the lower side of the precast beam, and particularly when the span and the upper load are large, the temporary supporting device needs to be arranged in an encrypted manner. This adds extra work, prolongs the construction period, and is costly.
Disclosure of Invention
The invention firstly provides a prefabricated bottom plate assembly of a superposed beam, and solves the problems of complicated construction, prolonged construction period and high manufacturing cost of the traditional superposed beam.
The technical scheme adopted by the invention for solving the technical problems is as follows: the composite beam prefabricated bottom plate assembly comprises a prefabricated bottom plate and a supporting piece, wherein a connecting piece is embedded in the prefabricated bottom plate, and the supporting piece is detachably connected to the lower side or the inner side of the prefabricated bottom plate through the connecting piece; the prefabricated bottom plate is internally provided with a reinforcement which comprises a stirrup and a longitudinal bar, and the stirrup comprises an embedded part embedded in the prefabricated bottom plate and an exposed part exposed out of the upper side or the outer side of the prefabricated bottom plate.
Further, the method comprises the following steps: the prefabricated bottom plate is a prefabricated arched bottom plate or a prefabricated flat beam, wherein: a connecting piece is embedded in the prefabricated arched bottom plate, the upper end of the connecting piece penetrates out of the outer side surface of the prefabricated arched bottom plate, and the supporting piece is positioned on the inner side of the prefabricated arched bottom plate and connected to the lower end of the connecting piece; and connecting pieces are embedded in the prefabricated flat beams, the lower ends of the connecting pieces are positioned on the lower surfaces of the prefabricated flat beams, and the supporting pieces are connected to the lower ends of the connecting pieces.
Further, the method comprises the following steps: the connecting piece is sleeve or connecting rod, wherein: the sleeve is embedded in the prefabricated bottom plate, the lower end of the sleeve is provided with a thread inlet, and the supporting piece is connected to the thread inlet of the sleeve through a bolt; the lower extreme of connecting rod is worn out prefabricated bottom plate's lower surface or medial surface, and the hypomere of connecting rod sets up the pinhole, wears to establish the pin in the pinhole, and support piece passes through pin joint in the lower extreme of connecting rod. When the prefabricated arched bottom plate is the prefabricated arched bottom plate, the upper end of the connecting piece is the end located on the outer side of the prefabricated arched bottom plate, and the lower end of the connecting piece is the end located on the inner side of the prefabricated arched bottom plate.
Specifically, when the prefabricated bottom plate is the prefabricated arch bottom plate, the connecting piece can also be a sleeve, a screw rod penetrates through the sleeve, the upper end of the screw rod is fixed through a nut, the lower end of the screw rod is connected with the supporting piece through the nut, and a gasket is arranged between the lower end of the sleeve and the supporting piece.
Further, the method comprises the following steps: the supporting piece is a section steel, an alloy section bar, a concrete member or a high polymer material member.
Further, the method comprises the following steps: the width of the side of the supporting piece, which is in contact with the prefabricated bottom plate, is consistent with the width of the prefabricated bottom plate.
The connecting piece is used for being connected between prefabricated bottom plate and the support piece to receive great power, for the steadiness that improves connecting piece and prefabricated bottom plate and connect, the slippage in following the pre-formed bottom plate after avoiding the connecting piece atress, in order to guarantee safety, further is: and the outer side of the connecting piece is provided with an anti-slip structure matched with the prefabricated arched bottom plate. For example, the anti-slip structure is: the outer side of the connecting piece is provided with a ring shape protruding out of the connecting piece; or, the anti-slip structure is as follows: the outer side of the connecting piece is in a wave shape or a round table shape, and one end with smaller cross section area of the round table is close to the supporting piece.
Specifically, when the prefabricated bottom plate is a prefabricated arched bottom plate, the upper end of the connecting piece penetrates out of the outer side surface of the prefabricated arched bottom plate, and the penetrating part of the connecting piece forms a shear-resistant stud; the supporting piece is an arched rod or an arched beam, a convex fixing ring is arranged around the connecting piece, and the fixing ring is positioned on the outer side surface of the prefabricated arched bottom plate.
The invention has the beneficial effects that:
firstly, bury the connecting piece underground in the prefabricated bottom plate of composite beam, the connecting piece is through dismantling connected mode connection support piece, and support piece has improved the bending resistance bearing capacity, anti shearing bearing capacity and the crack resistance of prefabricated bottom plate, and the upper surface or the lateral surface of prefabricated bottom plate directly are as the template of pouring of post-cast concrete, have not only realized the exempting from of composite beam and have been under construction, can also exempt from to support the construction, have reduced the engineering volume, have reduced the degree of difficulty, have shortened the time limit for a project, have practiced thrift the cost.
Secondly, the connecting pieces are connected with the supporting pieces in a detachable connection mode, and the bending resistance, the shearing resistance and the cracking resistance of the formed prefabricated bottom plate can be flexibly adjusted by adjusting at least one of the strength, the rigidity, the materials, the quantity and the intervals of the supporting pieces or the connecting pieces, for example, the strength, the rigidity, the materials, the quantity and the intervals of the supporting pieces. The prefabricated bottom plate can meet the use requirements of various spans even if being thin.
Thirdly, the support piece enlarges the applicable span range of the composite member of the laminated beam prefabricated base plate by improving the bending resistance bearing capacity, the shearing resistance bearing capacity and the cracking resistance of the prefabricated base plate, greatly reduces the types of the prefabricated base plates under the action of different spans and different loads, simplifies the prefabrication production, transportation, hoisting and installation difficulties of the prefabricated base plate, can excellently control the manufacturing cost of the laminated floor system and can also save the construction period.
Fourthly, the prefabricated bottom plate can be made thinner on the premise of meeting the bending resistance bearing capacity, the shearing resistance bearing capacity and the crack resistance, especially when the prefabricated bottom plate is the prefabricated arched bottom plate, the prefabricated arched bottom plate is not obviously thickened due to the increase of the span of the floor slab or the increase of the load, and then the quality of the prefabricated arched bottom plate is obviously increased, the problem of light weight of the superposed arched plate is solved, and the problem of overweight lifting is avoided by controlling the dead weight of the superposed beam prefabricated bottom plate assembly.
In addition, the connecting piece between support piece and the arch bottom plate is sleeve, connecting rod or sleeve pipe, acquires easily, and the cost is low. The connecting mode between the supporting piece and the connecting piece is simple, the precision requirement is low, and the construction is convenient. The supporting member can be a straight rod or an arch rod, such as a section steel, and can be a section steel with a groove type, a C type, a rectangular type, an L type or an I type section. The section steel has high supporting strength and is easy to obtain, and after the post-cast concrete composite beam is constructed and molded and meets the bearing capacity requirement, the section steel can be dismantled and recycled, so that repeated utilization is realized, and the section steel is green and environment-friendly.
The invention also provides a composite beam which comprises any one of the composite beam prefabricated bottom plate assemblies, wherein the post-cast concrete composite beam is poured on the upper surface or the outer side surface of the prefabricated bottom plate, and the prefabricated bottom plate is connected with the post-cast concrete composite beam in a shearing-resistant manner.
The laminated beam has the beneficial effects that: after the post-cast concrete superposed beam on the upper surface or the outer side surface of the prefabricated bottom plate is poured, the new concrete and the old concrete are connected in a shearing mode, integrity between the post-cast concrete superposed beam and the prefabricated arched bottom plate is guaranteed, and a stable structure is formed. The composite beam has great social benefit and economic value, and plays a great positive role in promoting the development of the fabricated building.
Drawings
Fig. 1 is a schematic view of an embodiment of the composite beam when the prefabricated floor is a prefabricated arched floor.
Fig. 2 is an enlarged schematic view of a dome of the composite beam shown in fig. 1.
Fig. 3 is a schematic sectional view of the composite girder of fig. 1 in a vault direction.
Fig. 4 is a schematic view of the connection of the prefabricated arched deck and the supporting members of another embodiment of the prefabricated deck assembly of the composite girder.
Fig. 5 is a schematic view of the connection of the prefabricated arched deck and the supporting members of another embodiment of the prefabricated deck assembly of the composite girder.
Fig. 6 is a schematic view of the connection of the prefabricated arched deck and the supporting members of another embodiment of the prefabricated deck assembly of the composite girder.
Fig. 7 is a schematic view of the connection of the prefabricated arched deck and the supporting members of another embodiment of the prefabricated deck assembly of the composite girder.
Fig. 8 is a schematic view of the connection of a prefabricated arched deck and supports of another embodiment of a composite girder prefabricated deck assembly.
Fig. 9 is a schematic sectional view of another embodiment of the composite beam along the direction of the arch.
Fig. 10 is a schematic view of a joint between another embodiment of the composite beam and the precast column.
Fig. 11 is a cross-sectional view of the composite beam shown in fig. 10.
Parts, positions and numbers in the drawings: the prefabricated arched bottom plate 11, the prefabricated flat beam 12, the support 2, the sleeve 31, the bolt 311, the shear stud 312, the fixing ring 313, the connecting rod 32, the pin 321, the sleeve 33, the screw 331, the nut 332, the washer 333, the stirrup 4, the longitudinal bar 5, the post-cast concrete composite beam 6 and the prefabricated column 7.
Detailed Description
The invention will be further explained with reference to the drawings.
The invention discloses a prefabricated bottom plate assembly of a superposed beam, which comprises a prefabricated bottom plate and a supporting piece 2, wherein a connecting piece is embedded in the prefabricated bottom plate, and the supporting piece 2 is detachably connected to the lower side or the inner side of the prefabricated bottom plate through the connecting piece. The prefabricated floor can be a flat bottom girder or an arched girder, and the supporting members 2 are attached to the lower side of the prefabricated floor if the prefabricated floor is flat, and the supporting members 2 are attached to the inner side of the arch if the prefabricated floor is arched. The reinforcement comprises a stirrup 4 and a longitudinal bar 5, wherein the stirrup 4 comprises an embedded part embedded in the prefabricated bottom plate and an exposed part exposed on the upper side or the outer side of the prefabricated bottom plate. The longitudinal ribs 5 are embedded in the prefabricated bottom plate.
Referring to fig. 1, the precast bottom plate assembly of the composite beam of the present invention is a precast arched bottom plate 11, that is, comprises a precast arched bottom plate 11 and a support member 2, wherein a reinforcement is arranged in the precast arched bottom plate 11, the precast arched bottom plate 11 is a reinforced concrete slab, and the reinforcement comprises a stirrup 4 and a longitudinal reinforcement 5. The stirrup 4 is partially embedded in the prefabricated arched bottom plate 11, and the other part of the stirrup is exposed out of the outer side surface of the prefabricated arched bottom plate 11. The longitudinal ribs 5 are arranged along the arc direction of the prefabricated arched bottom plate 11, as shown in fig. 2. Connecting pieces are also embedded in the prefabricated arched bottom plates 11, and as the thickness of the prefabricated arched bottom plates 11 is not large, in order to realize the stable connection of the prefabricated arched bottom plates 11 and the supporting pieces 2, the upper ends of the connecting pieces penetrate out of the outer side surfaces of the prefabricated arched bottom plates 11, and the parts penetrating out of the outer side surfaces of the prefabricated arched bottom plates 11 form shear-resistant studs, and the shear-resistant studs realize the shear-resistant connection of the new concrete on the outer side surfaces of the prefabricated arched bottom plates 11 and the prefabricated arched bottom plates 11, namely the shear-resistant connection between the new concrete and the post-cast concrete superposed beams 6. The upper end of the connecting piece is one end located on the outer side of the prefabricated arched bottom plate 11, and the lower end of the connecting piece is one end located on the inner side of the prefabricated arched bottom plate 11.
Specifically, referring to fig. 1 to 3, in the prefabricated bottom plate assembly of the composite beam of the present invention, the connecting member is a sleeve 31, and a portion of the sleeve 31 penetrating through the outer side surface of the prefabricated arched bottom plate 11 may be a cylinder of the sleeve 31, or may be a steel bar segment fixedly connected to the upper end of the sleeve 31, for example, a welded steel bar segment, and the steel bar segment forms the shear stud 312. In addition, because the stirrup 4 already realizes the shear connection between the prefabricated arched bottom plate 11 and the post-cast concrete composite beam 6, the connecting piece can be completely embedded in the prefabricated arched bottom plate 11 on the premise of ensuring the stability of the connection of the supporting piece, or the connecting piece penetrates out of the prefabricated arched bottom plate 11, but the shear-resistant stud 312 is not arranged. The sleeves 31 may or may not be welded to the reinforcing bars of the prefabricated arched deck 11.
The lower end of the sleeve 31 is provided with a threaded inlet, the support member 2 is connected to the inner side surface of the prefabricated arched bottom plate 11, and the support member 2 is connected to the threaded inlet of the sleeve 31 through a bolt 311. The prefabricated arched bottom plate 11 and the supporting piece 2 are detachably connected through the sleeves 31 and the bolts 311. The supporting member 2 improves the strength of the prefabricated arched bottom plate 11, enables the composite beam prefabricated bottom plate assembly to be used for a larger span on the premise that the prefabricated arched bottom plate 11 is thin, and can flexibly adjust the bending resistance of the prefabricated arched bottom plate 11 in the construction stage.
The support 2 is a part that supports the prefabricated arched deck 11, and may be an arched rod-like or arched frame member. The support 2 is preferably an arch bar in view of the shape of the superposed beam. For example, the supporting member 2 is an arch-shaped steel, and referring to fig. 1 to 3, the supporting member 2 is a C-shaped steel with an inner side opened. In addition, the supporting member 2 may also be an alloy profile, a concrete member or a polymer material member. For example, as shown in fig. 4 to 7, the supporting member 2 is a section steel, and the section shape of the section steel is a groove shape, a C shape, a rectangular shape, an L shape or an i shape. When the supporting member 2 is an arched i-beam, two rows of sleeves 31 may be provided for each section, as shown in fig. 6, to ensure the balance of the connection.
The support 2 may be an arched bar or beam, but also a frame structure. For easy assembly and hoisting, the support member 2 is preferably a high strength, light weight and low cost profile steel. In order to facilitate the hoisting of the prefabricated bottom plate assembly of the superposed beam, the upper end of the partial sleeve 31 can be welded and connected with a hoisting ring, and the hoisting ring is used for hoisting and has the equivalent function with the shear-resistant stud 312. The width of the side of the support member 2 contacting the prefabricated arched bottom plate 11 is the width of the outer side surface, and the width of the outer side surface of the support member 2 is preferably consistent with the width of the prefabricated arched bottom plate 11, so that the support member 2 can completely support the prefabricated arched bottom plate 11.
In order to make the inner surface of the prefabricated arched bottom plate 11 a smooth curved surface, the sleeve 31 is embedded in the prefabricated arched bottom plate 11, and the lower end of the sleeve 31 does not exceed the inner surface of the prefabricated arched bottom plate 11. In order to facilitate the detachment of the support member 2 and ensure that the outer side surface of the post-cast concrete composite beam 6 is a smooth curved surface, the height of the sleeve 31 exposed out of the outer side surface of the prefabricated arched bottom plate 11 is consistent with the design thickness of the upper post-cast concrete composite beam, or the height of the sleeve 31 exposed out of the outer side surface of the prefabricated arched bottom plate 11 is smaller than the design thickness of the post-cast concrete composite beam. The supporting member 2 can be provided with a lifting ring to facilitate the hoisting of the prefabricated bottom plate assembly of the superposed beam.
In order to ensure the stability between the connecting piece and the prefabricated arched bottom plate 11, an anti-slip structure matched with the prefabricated arched bottom plate 11 is arranged on the outer side of the connecting piece. The anti-slip structure can be a side wing arranged on the outer side of the connecting piece, the side wing is embedded in the prefabricated bottom plate, specifically, the side wing is embedded in the prefabricated arched bottom plate 11, or the anti-slip structure is that the outer contour of the connecting piece is in a cone or pyramid shape, and one end with relatively smaller cross sections of the cone and the pyramid is close to the supporting piece 2. Alternatively, as shown in fig. 3, the anti-slip structure is such that a fixing ring 313 protruding from the sleeve 31 is provided around the sleeve 31. The fixing ring 313 is embedded in the concrete of the prefabricated arched bottom plate 11. Preferably, the securing ring 313 is located on the outer side of the prefabricated arched deck 11.
The prefabricated arched bottom plate 11 and the supporting member 2 of the prefabricated bottom plate assembly of the composite beam are detachably connected through a connecting member, and the connecting member can be a connecting rod 32 besides the sleeve 31. As shown in fig. 8, the upper end of the connecting rod 32 penetrates through the outer side surface of the prefabricated arched bottom plate 11, the lower end of the connecting rod 32 penetrates through the inner side surface of the prefabricated arched bottom plate 11, the part of the connecting rod 32 penetrating through the inner side surface of the prefabricated arched bottom plate 11 is provided with a pin hole, a pin 321 penetrates through the pin hole, and the support member 2 is connected to the lower end of the connecting rod 32 through the pin 321. The connecting rod 32 is also provided with an anti-slip structure in correspondence with the aforementioned sleeve 31. The upper end of the connecting rod 32 may or may not be provided with shear studs. The support 2 may be a section steel, an alloy section, a concrete member or a polymer material member. After the supporting member 2 is removed in the later construction stage, the part of the connecting rod 32 penetrating through the inner surface of the prefabricated arched bottom plate 11 is cut off, so that the inner surface of the prefabricated arched bottom plate 11 can be ensured to be a smooth curved surface.
In addition, the connecting member of the prefabricated floor assembly of the composite beam of the present invention may be a sleeve 33. Referring to fig. 9, a screw 331 penetrates through the casing 33, both upper and lower ends of the screw 331 penetrate through the casing 33 and are sleeved with a nut 332, and the lower end of the screw 331 is connected to the support 2 through the nut 332. In order to ensure the stability of the connection of the support 2, a washer 333 is provided between the end of the sleeve 33 and the support 2, outside the screw 331. Both ends of the sleeve 33 may be provided with washers 333. The length of the sleeve 33 is preferably the same as the total thickness of the prefabricated arched deck 11 and the upper post-cast concrete composite beam 6. The material and structure of the supporting member 2 are as described above, and will not be repeated here.
In the prefabricated bottom plate assembly of the superposed beam of the invention, the supporting pieces 2 are respectively connected with each connecting piece. Every support piece 2 is connected through two at least connecting pieces, and the pitch arc distance of two adjacent connecting pieces is 50 ~ 2000 mm. At the end of the support 2, the distance between two adjacent connectors is reduced, i.e. the connectors are arranged encrypted at the end of the support 2, as shown in fig. 1. As the support member 2 increases the strength of the prefabricated arched bottom plate 11, the prefabricated arched bottom plate 11 can be made thin, and certainly can be made thicker, for example, the thickness is 30-300 mm. The prefabricated arched bottom plate 11 is a reinforced concrete slab C20-C60, such as a reinforced concrete slab C30.
In the above-mentioned prefabricated bottom plate assembly for the superposed beams according to the present invention, the prefabricated bottom plate can also be a prefabricated flat beam 12, that is, it comprises a prefabricated flat beam 12 and a supporting member 2, and referring to fig. 10 and 11, a connecting member is embedded in the prefabricated flat beam 12, and the lower end of the connecting member is located on the lower surface of the prefabricated flat beam 12 and is connected to the lower end of the connecting member. The reinforcement in the prefabricated flat beam 12 comprises stirrups 4 and longitudinal reinforcements 5, wherein the stirrups 4 are the stirrups 4 of the whole composite beam, so the stirrups 4 comprise an embedded part embedded in the prefabricated flat beam 12 and an exposed part exposed out of the upper side of the prefabricated flat beam 12, and the exposed part is used for connecting the steel bars of the post-cast concrete composite beam 6. The post-cast concrete composite beam 6 is the cast-in-place part of the composite beam. The longitudinal ribs 5 are arranged along the length direction of the superposed beam and are embedded in the prefabricated flat beam 12. The connector may be any of the previously described connectors, such as a sleeve 31 or a connecting rod 32. The outer side of the connecting piece can be also provided with the anti-slip structure.
Due to the large thickness of the prefabricated flat beam 12, the connecting elements are all located inside the prefabricated flat beam 12. The support 2 is supported from the bottom of the precast flat beam 12, increasing its strength. The support member 2 is any one of the above, for example, i-steel, and is connected to the bolt 311 through two rows of sleeves 31. The width of the supporting member 2 is preferably the same as the width b of the precast flat girder 12, and the length of the supporting member 2 may be shorter than the length of the precast flat girder 12, so that both ends of the precast flat girder 12 are located outside the ends of the supporting member 2, thereby facilitating the installation of the precast flat girder 12.
The second subject of the invention: the composite beam comprises the composite beam prefabricated bottom plate assembly, the post-cast concrete composite beam 6 is poured on the upper surface or the outer side surface of the prefabricated bottom plate, and the prefabricated bottom plate is connected with the post-cast concrete composite beam 6 in a shearing-resistant mode. The superposed beams comprise a superposed arched beam and a superposed flat beam according to the shape of the prefabricated bottom plate.
As shown in fig. 1 to 3 and 9, the composite beam is a composite arched beam, the outer side surface of the prefabricated arched bottom plate 11 is a post-cast concrete composite beam 6 with reinforcing bars, and the beam height of the composite beam is h, that is, the total thickness of the prefabricated arched bottom plate 11 and the post-cast concrete composite beam 6 is h. The prefabricated arched bottom plate 11 and the post-cast concrete superposed beam 6 are connected in a shearing mode through the stirrups 4. In addition, as shown in fig. 10 and 11, the superposed beam is a superposed flat beam, and the connection between the superposed beam and the prefabricated column 7 is shown in fig. 10; the composite beam is provided with floors on both sides, for example, the floors are composite floors, as shown in fig. 11.
Claims (8)
1. The prefabricated bottom plate sub-assembly of composite beam, its characterized in that: the prefabricated base plate comprises a prefabricated base plate and a supporting piece (2), wherein the supporting piece (2) is detachably connected to the lower side or the inner side of the prefabricated base plate through a connecting piece; the reinforcement is arranged in the prefabricated bottom plate and comprises stirrups (4) and longitudinal reinforcements (5), and the stirrups (4) comprise embedded parts embedded in the prefabricated bottom plate and exposed parts exposed at the upper side or the outer side of the prefabricated bottom plate;
the prefabricated bottom plate is a prefabricated arched bottom plate (11) or a prefabricated flat beam (12), wherein: a connecting piece is embedded in the prefabricated arched bottom plate (11), the upper end of the connecting piece penetrates out of the outer side face of the prefabricated arched bottom plate (11), a shear-resistant stud is formed at the part of the connecting piece, which penetrates out of the outer side face of the prefabricated arched bottom plate (11), and the supporting piece (2) is positioned on the inner side of the prefabricated arched bottom plate (11) and connected to the lower end of the connecting piece; connecting pieces are embedded in the prefabricated flat beam (12), the lower ends of the connecting pieces are positioned on the lower surface of the prefabricated flat beam (12), and the supporting pieces (2) are connected to the lower ends of the connecting pieces;
the connecting piece is sleeve (31), connecting rod (32) or sleeve pipe (33), wherein:
the sleeve (31) is embedded in the prefabricated bottom plate, the lower end of the sleeve (31) is provided with a thread inlet, and the support piece (2) is connected to the thread inlet of the sleeve (31) through a bolt (311);
the lower end of the connecting rod (32) penetrates through the lower surface or the inner side surface of the prefabricated bottom plate, the lower section of the connecting rod (32) is provided with a pin hole, a pin (321) penetrates through the pin hole, and the support piece (2) is connected to the lower end of the connecting rod (32) through the pin (321);
the connecting piece is sleeve pipe (33), and prefabricated bottom plate is prefabricated arch bottom plate (11), wears to establish screw rod (331) in sleeve pipe (33), and the upper end of screw rod (331) is fixed through nut (332), and support piece (2) are connected through nut (332) to the lower extreme of screw rod (331).
2. The composite beam precast floor assembly of claim 1 wherein: a washer (333) is arranged between the lower end of the sleeve (33) and the support (2).
3. The composite girder prefabricated floor assembly according to claim 1 or 2, wherein: the supporting piece (2) is a section steel, an alloy section bar, a concrete member or a high polymer material member.
4. The composite beam precast floor assembly of claim 3 wherein: the width of the side of the support member (2) contacting the prefabricated bottom plate is consistent with the width of the prefabricated bottom plate.
5. The composite girder prefabricated floor assembly according to claim 1 or 2, wherein: and an anti-slip structure matched with the prefabricated arched bottom plate (11) is arranged on the outer side of the connecting piece.
6. The composite beam precast floor assembly of claim 5 wherein: the anti-slip structure is as follows: the outer side of the connecting piece is provided with a ring shape protruding out of the connecting piece; or, the anti-slip structure is as follows: the outer side of the connecting piece is wave-shaped or round table-shaped, and the end with smaller cross section area of the round table is close to the supporting piece (2).
7. The composite girder prefabricated floor assembly according to claim 1 or 2, wherein: the prefabricated arched bottom plate is a prefabricated arched bottom plate (11), the supporting piece (2) is an arched rod or an arched beam, a convex fixing ring (313) is arranged around the connecting piece, and the fixing ring (313) is positioned on the outer side surface of the prefabricated arched bottom plate (11).
8. The composite beam is characterized in that: the composite beam prefabricated bottom plate assembly of any one of the claims 1 to 7, wherein the post-cast concrete composite beam (6) is cast on the upper surface or the outer side surface of the prefabricated bottom plate, and the prefabricated bottom plate is connected with the post-cast concrete composite beam (6) in a shearing mode.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811124869.1A CN109252622B (en) | 2018-09-26 | 2018-09-26 | Prefabricated bottom plate assembly of composite beam and composite beam |
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| CN201811124869.1A CN109252622B (en) | 2018-09-26 | 2018-09-26 | Prefabricated bottom plate assembly of composite beam and composite beam |
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| CN109252622B true CN109252622B (en) | 2021-09-28 |
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|---|---|---|---|---|
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