CN114108943B - Prefabricated coupling beam, laminated beam and building structure of segmental cavity - Google Patents

Prefabricated coupling beam, laminated beam and building structure of segmental cavity Download PDF

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Publication number
CN114108943B
CN114108943B CN202111217708.9A CN202111217708A CN114108943B CN 114108943 B CN114108943 B CN 114108943B CN 202111217708 A CN202111217708 A CN 202111217708A CN 114108943 B CN114108943 B CN 114108943B
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longitudinal
section
cavity
concrete
segment
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CN114108943A (en
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孙志娟
初明进
初晓彤
武盛韬
孙杰
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Beijing University of Civil Engineering and Architecture
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Beijing University of Civil Engineering and Architecture
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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00—Structural elongated elements designed for load-supporting
    • E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B5/00—Floors; Floor construction with regard to insulation; Connections specially adapted therefor
    • E04B5/02—Load-carrying floor structures formed substantially of prefabricated units
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B5/00—Floors; Floor construction with regard to insulation; Connections specially adapted therefor
    • E04B5/02—Load-carrying floor structures formed substantially of prefabricated units
    • E04B5/04—Load-carrying floor structures formed substantially of prefabricated units with beams or slabs of concrete or other stone-like material, e.g. asbestos cement
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00—Structural elongated elements designed for load-supporting
    • E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
    • E04C3/20—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of concrete or other stone-like material, e.g. with reinforcements or tensioning members

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Rod-Shaped Construction Members (AREA)

Abstract

The invention provides a prefabricated coupling beam, a superposed beam and a building structure of a segment cavity, and relates to the technical field of buildings, wherein the prefabricated coupling beam of the segment cavity comprises a beam body, at least one first segment beam and at least one second segment beam are arranged along the length direction of the beam body, and a first coupling beam stirrup is pre-embedded in the first segment beam; the second section beam is provided with a cavity from the top downwards; wherein, be equipped with the splice bar in the cavity, the splice bar extends to the concrete area of first section roof beam and second section roof beam top post-cast at least. Through the mode, the prefabricated connecting beam of the segment cavity does not need to be grooved or perforated at the position of the side formwork stirrup when the first connecting beam stirrup and the connecting rib are arranged, and the manufacturing process is greatly reduced.

Description

Prefabricated coupling beam, laminated beam and building structure of segmental cavity
Technical Field
The invention relates to the technical field of buildings, in particular to a prefabricated connecting beam and a superposed beam of a segment cavity and a building structure.
Background
The coupling beam is generally constructed in two types, one of which is a laminated coupling beam, i.e., the coupling beam has a lower prefabricated reinforced concrete portion and an upper cast-in-place reinforced concrete portion, and the stirrups of the coupling beam extend from the prefabricated portion into the cast-in-place portion. The other type is a formwork connecting beam which consists of a prefabricated reinforced concrete U-shaped formwork and cast-in-place concrete in the formwork, and the stirrup of the connecting beam extends out of the upper part of the formwork. The connecting beam with the structure needs to be grooved or holed at the stirrup position during manufacturing, so that the manufacturing process is complex, the side die cannot be used universally, and the die plate is large in amortization.
Disclosure of Invention
The embodiment of the invention provides a prefabricated connecting beam and a superposed beam of a segmental cavity and a building structure, which are used for solving the technical problems that the superposed connecting beam or a formwork connecting beam is complex in structure, the prefabricated part is complex to manufacture, and a formwork is large in amortization in the prior art.
The embodiment of the invention provides a prefabricated coupling beam of a segment cavity, which comprises:
the beam body comprises at least one section of first section beam and at least one section of second section beam along the length direction of the beam body, and a first connecting beam hoop is pre-embedded in the first section beam;
the second section beam is provided with a cavity from the top downwards; wherein the content of the first and second substances,
and connecting ribs are arranged in the cavities and at least extend to the cast-in-place concrete areas at the tops of the first section beam and the second section beam.
According to the prefabricated coupling beam with the segment cavities, provided by the embodiment of the invention, the middle part of the first segment beam is provided with the hole, and the first connecting beam stirrup is sleeved outside the hole.
An embodiment of the present invention further provides a composite beam, including:
the prefabricated coupling beam;
and cast-in-place concrete on the top of the prefabricated coupling beam of the segment cavity.
According to the composite beam provided by the embodiment of the invention, the top of the first section of beam is provided with the beam longitudinal bar, the concrete area poured on the top of the first section of beam and the top of the second section of beam is provided with the second connecting beam stirrup, and the beam longitudinal bar is positioned in the second connecting beam stirrup.
According to the composite beam provided by the embodiment of the invention, the longitudinal ribs are arranged inside the connecting ribs in a penetrating manner.
According to the laminated beam provided by the embodiment of the invention, the longitudinal rib comprises a first longitudinal rib unit group and a second longitudinal rib unit group, the first longitudinal rib unit group comprises two first longitudinal rib units arranged at intervals, and the second longitudinal rib unit group comprises two second longitudinal rib units arranged at intervals;
the concrete area on the top of the first section beam and the second section beam is provided with the first longitudinal rib unit; alternatively, the first and second electrodes may be,
the concrete area at the top of the first section beam and the second section beam is provided with the first longitudinal rib unit, and the concrete area in the cavity is provided with the second longitudinal rib unit.
According to the composite beam of the embodiment of the invention, the connecting rib is wrapped around the first longitudinal rib unit and the second longitudinal rib unit and forms a first bulge and a second bulge on the concrete area on the top of the first section beam and the second section beam.
According to the laminated beam of one embodiment of the present invention, the first projecting portion extends in a direction opposite to the second projecting portion;
or the first projection is connected with the second projection.
According to the composite beam provided by the embodiment of the invention, a third longitudinal reinforcement unit is arranged inside the first bulge part and in a concrete area poured on the tops of the first section beam and the second section beam, and a fourth longitudinal reinforcement unit is arranged inside the second bulge part and in a concrete area poured on the tops of the first section beam and the second section beam.
An embodiment of the present invention further provides a building structure, including: prefabricating a floor slab;
according to the composite beam, the precast floor slabs are erected on one side or two sides of the precast beam of the segment cavity, and the composite beam is connected with the precast floor slabs through cast-in-place concrete.
The prefabricated coupling beam of the segment cavity, the composite beam and the building structure provided by the embodiment of the invention have the advantages that the prefabricated coupling beam of the segment cavity comprises at least one first segment beam and at least one second segment beam, the first coupling beam stirrup is pre-embedded in the first segment beam to ensure the strength and rigidity of the prefabricated part of the composite coupling beam, the cavity is formed in the second segment beam, the coupling bars in the cavity at least extend to the concrete areas at the tops of the first segment beam and the second segment beam, namely the coupling bars are used for ensuring the integrity between the prefabricated coupling beam of the segment cavity and a cast-in-place concrete structure, and the composite beam with reliable stress is formed. The second section beam is provided with a hole communicated with the cavity, and longitudinal ribs can be arranged, so that the connecting ribs can more effectively resist the shearing force borne by the connecting beam; and the integrity of the cast-in-place concrete of the coupling beam is improved. Adopt the precast coupling beam of segment cavity, first coupling beam stirrup does not stretch out precast concrete surface, need not make the convenience during preparation at side forms stirrup position fluting or trompil, lifting efficiency and benefit.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or 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 those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
FIG. 1 is a schematic structural view of an embodiment of a building structure according to the present invention;
FIG. 2 is a schematic structural view of another embodiment of a building structure according to an embodiment of the present invention;
FIG. 3 is a schematic structural view of a third embodiment of a building structure according to an embodiment of the present invention;
FIG. 4 isbase:Sub>A cross-sectional view taken at A-A of FIG. 3;
FIG. 5 isbase:Sub>A cross-sectional view taken at A-A of FIG. 1;
FIG. 6 isbase:Sub>A cross-sectional view taken at A-A of FIG. 2;
FIG. 7 isbase:Sub>A cross-sectional view of another embodiment taken at A-A of FIG. 2;
FIG. 8 isbase:Sub>A cross-sectional view of the third embodiment shown in FIG. 2 at A-A;
FIG. 9 is a cross-sectional view of one embodiment shown at B-B in FIG. 1;
FIG. 10 is a cross-sectional view of another embodiment at B-B of FIG. 1;
FIG. 11 is a cross-sectional view of the third embodiment at B-B as shown in FIG. 1;
FIG. 12 is a cross-sectional view of the fourth embodiment at B-B of FIG. 1;
FIG. 13 is a cross-sectional view of the fifth embodiment at B-B as shown in FIG. 1;
FIG. 14 is a cross-sectional view of the sixth embodiment shown in FIG. 1 at B-B;
FIG. 15 is a cross-sectional view of the seventh embodiment shown at B-B in FIG. 1;
FIG. 16 is a cross-sectional view of the eighth embodiment shown at B-B in FIG. 1;
FIG. 17 is a cross-sectional view of the ninth embodiment shown in FIG. 1 at B-B;
FIG. 18 is a cross-sectional view of the tenth embodiment shown at B-B in FIG. 1;
FIG. 19 is a cross-sectional view of the eleventh embodiment shown at B-B in FIG. 1;
FIG. 20 is a cross-sectional view of the twelfth embodiment shown at B-B in FIG. 1;
reference numerals:
1. a beam body;
10. a first section beam; 110. a first tie beam stirrup; 120. a beam longitudinal bar; 130. a second coupling beam stirrup; 140. a hole;
20. a second section beam; 210. a cavity; 220. connecting ribs; 2210. a first projecting portion; 2211. a third longitudinal rib unit; 2212. a fifth longitudinal rib unit; 2213. a seventh longitudinal rib unit; 2214. a first bent portion; 2220. a second projection; 2221. a fourth longitudinal rib unit; 2222. a sixth longitudinal rib unit; 2223. an eighth longitudinal rib unit; 2224. a second bent portion; 230. longitudinal ribs; 2310. a first longitudinal rib unit group; 2311. a first longitudinal rib unit; 2320. a second longitudinal rib unit group; 2321. a second longitudinal rib unit; 240. matching a space; 250. a third connecting beam stirrup; 2510. a ninth longitudinal rib unit; 260. a third longitudinal rib unit group; 270. an open stirrup; 280. connecting a stirrup;
30. a building structure; 310. prefabricating a floor slab; 320. concrete; 330. and (3) prefabricating the connecting beam of the cavity of the segment.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the embodiments of 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 embodiments of the present invention, it should be noted that the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, a fixed connection, a detachable connection, or an integral connection, unless explicitly stated or limited otherwise; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. Specific meanings of the above terms in the embodiments of the present invention can be understood in specific cases by those of ordinary skill in the art.
Referring now to fig. 1 to 17, an embodiment of the present invention provides a building structure 30 including a precast floor slab 310 and a laminated beam including precast coupling girders 330 for segment cavities and cast-in-place concrete 320 on top of the precast coupling girders 330 for segment cavities. The prefabricated floor slab 310 is erected on the prefabricated coupling beam 330 of the segment cavity, and the prefabricated floor slab 310 and the prefabricated coupling beam 330 of the segment cavity are connected through pouring concrete 320.
In some embodiments of the present invention, the prefabricated coupling beam 330 of the segmental cavity comprises a beam body 1, wherein the beam body 1 comprises at least one first segmental beam 10 and at least one second segmental beam 20, and a first connecting beam hoop 110 is embedded in the first segmental beam 10 for improving the strength of the first segmental beam 10. The second sectional girder 20 is connected to the first sectional girder 10 and arranged along the length direction of the precast floor slab 310, and the second sectional girder 20 is provided with a cavity 210 from the top downward. Wherein, a connecting rib 220 is arranged in the cavity 210, and the connecting rib 220 at least extends to the concrete 320 area poured on the top of the first section beam 10 and the second section beam 20. For the prefabricated coupling beam 330 of the segment cavity, a first segment beam 10, a second segment beam 20 and the first segment beam 10 may be sequentially arranged along a length extending direction of the wall panel, and so on; or the second-segment girder 20, the first-segment girder 10, and the second-segment girder 20 are sequentially disposed, and so on. For example, fig. 1 and fig. 3 show two arrangements, respectively, which are not limited herein.
The girder body 1 includes at least one first-segment girder 10 and at least one second-segment girder 20, the first-segment girder 10 and the second-segment girder 20 are sequentially arranged along a length direction of the precast floor slab 310, for example, a first-segment girder 10 is firstly disposed and then a second-segment girder 20 is connected, and a first-segment girder 10 is further disposed at an end of the second-segment girder 20 far from the first-segment girder 10, and the arrangement is repeatedly performed. Since the first-segment girder 10 is provided with the first-link girder stirrup 110 therein, it is possible to reinforce the rigidity and load-bearing capacity of the prefabricated coupling girder 330 of the integral-segment cavity. And the cavity 210 is arranged in the second-section girder 20, and the connecting rib 220 is arranged in the cavity 210 and extends to the concrete 320 area at the top of the first-section girder 10 and the second-section girder 20, so that the integrity of the connection between the prefabricated coupling beam 330 of the integral-section cavity and the concrete 320 area can be ensured, and the shear-resistant bearing capacity of the laminated girder can be provided. The template does not need to be grooved or perforated when the prefabricated coupling beam 330 of the segment cavity is manufactured, so that the manufacturing process is saved, the universality is higher, and the template amortization is reduced or even avoided.
Referring to fig. 4 to 8, in some embodiments of the present invention, a beam longitudinal rib 120 is disposed on a top of the first section of beam 10, and a second coupling beam stirrup 130 is disposed around an outer side of the beam longitudinal rib 120. It should be noted that the longitudinal beam ribs 120 may be separately disposed in the concrete 320 area on the top of the first-segment beam 10, and the number of the longitudinal beam ribs 120 may be, but is not limited to, two. In still other embodiments of the present invention, the second coupling beam stirrup 130 is provided around the outer side of the beam longitudinal rib 120. Further, it is also possible to open a groove at the top of the first section beam 10, and the second beam connecting stirrup 130 extends at least partially into the groove at the top of the first section beam 10 to increase the overall rigidity of the first section beam 10.
Referring to fig. 6 to 8, in a further embodiment of the present invention, a hole 140 is formed in the middle of the first section beam 10 along the longitudinal direction of the beam, and the hole 140 is located in the first beam stirrup 110 and communicates with the cavity 210. Alternatively, the cross-sectional shape of the aperture 140 may be, but is not limited to, rectangular, circular, oval, etc., and is not so limited.
Referring to fig. 9 to 20, in some embodiments of the present invention, a longitudinal bar 230 is disposed through the connecting bar 220, and it should be noted that when the beam longitudinal bar 120 in the first-segment beam 10 passes through the second-segment beam 20, the longitudinal bar 230 corresponds to the beam longitudinal bar 120, that is, the beam longitudinal bar 120 and the longitudinal bar 230 are the same steel bar, and only the first-segment beam 10 and the second-segment beam 20 are named separately, and are not described herein again. The longitudinal bars 230 and the connecting bars 220 together form a steel reinforcement cage.
Referring to fig. 9 and 10, optionally, the longitudinal rib 230 includes a first longitudinal rib unit group 2310 and a second longitudinal rib unit group 2320, where the first longitudinal rib unit group 2310 includes two first longitudinal rib units 2311 arranged at intervals, and the second longitudinal rib unit group 2320 includes two second longitudinal rib units 2321 arranged at intervals. Wherein the concrete 320 area at the top of the first section girder 10 and the second section girder 20 is provided with a first longitudinal rib unit 2311. Alternatively, in still other embodiments of the present invention, the area of concrete 320 on top of the first and second section beams 10 and 20 is provided with the first longitudinal rib unit 2311, and the area of concrete 320 within the cavity 210 is provided with the second longitudinal rib unit 2321. That is, the first longitudinal rib unit 2311 is arranged at the end of the connecting rib 220 extending into the top concrete 320 area of the first section beam 10 and the second section beam 20 as a supporting point, or the first longitudinal rib unit 2311 and the second longitudinal rib unit 2321 are arranged at the end of the connecting rib 220 extending into the top concrete 320 area of the first section beam 10 and the second section beam 20 and the end extending into the cavity 210. The second longitudinal bar element 2321 is disposed in the cavity 210; or the second longitudinal bar unit 2321 passes through the longitudinal hole 140 and is arranged at the lower part of the coupling beam.
Referring to fig. 11, it should be noted that a third longitudinal rib unit group 260 and an open stirrup 270 are disposed in the second section of beam 20, the open stirrup 270 is wrapped outside the third longitudinal rib unit group 260, the third longitudinal rib unit group 260 and the open stirrup 270 are used to ensure the overall strength of the second section of beam 20, and the open stirrup 270 can also provide a shear-resistant bearing capacity.
Referring to fig. 12 to 15, in some embodiments of the present invention, the tie bars 220 surround the first and second longitudinal bar units 2311 and 2321 and form first and second protrusions 2210 and 2220 in the concrete 320 area at the top of the first and second section beams 10 and 20. The connection rib 220 may be provided as a single piece, for example, both ends of the connection rib 220 respectively wrap around the second longitudinal rib unit 2321 and extend away from each other at the first longitudinal rib unit 2311 to form a wrap around the first longitudinal rib unit 2311 and the second longitudinal rib unit 2321, and respectively form a first projection 2210 and a second projection 2220, and the first projection 2210 and the second projection 2220 are both located in the concrete 320 area on the top of the first section beam 10 and the second section beam 20.
With reference to fig. 12 and 13, the two limbs of the connecting rib 220 on the side of the connecting beam rise to the position close to the top surface of the concrete 320, and the ends bent inwards extend to the region outside the connecting rib 220 in the opposite direction for a certain length, so as to be used as the negative-moment reinforcing steel bar of the laminated floor slab formed by the precast floor slab 310 and the concrete 320. Thus, when the sum of the thickness of the precast floor slab 310 and the thickness of the concrete 320 does not satisfy the anchoring length requirement of the joint bar 220 in the concrete 320, the anchoring requirement can be satisfied by this means. Particularly, the steel bar can also be used as a hogging moment steel bar of a composite floor slab, and one steel bar has two functions, so that the efficiency of the steel bar is exerted to the maximum extent. That is, the first projection 2210 and the second projection 2220 may be spaced apart with both ends extending in opposite directions, corresponding to the first projection 2210 and the second projection 2220. The end of the first projection 2210 can be further provided with a first bending part 2214, and the end of the second projection 2220 can be further provided with a second bending part 2224. A matching space 240 may also be formed between the precast floor slab 310 and the second section girder 20, and the matching space 240 is located at an area between the top of the second section girder 20 and the top of the precast floor slab 310. The first bent part 2214 and the second bent part 2224 may be extended into the matching space 240. Alternatively, the first bent part 2214 and the second bent part 2224 are located at the concrete 320 area on the top of the precast floor slab 310, respectively.
With continued reference to fig. 13 and 15, further, a third longitudinal rib unit 2211 is disposed inside the first projection 2210 and in the area of the concrete 320 poured on top of the first section girder 10 and the second section girder 20, and a fourth longitudinal rib unit 2221 is disposed inside the second projection 2220 and in the area of the concrete 320 poured on top of the first section girder 10 and the second section girder 20. The third longitudinal rib unit 2211 is provided between the first bent portion 2214 and the first projection 2210 toward the inside in the second sectional beam 20 direction. The fourth longitudinal bar unit 2221 is provided between the second bent portion 2224 and the second projecting portion 2220 toward the inside in the direction of the second segment beam 20. As shown in fig. 12 and 14, the first and second bends 2214 and 2224 in fig. 12 are in the area of the concrete 320 at the top of the first and second section beams 10 and 20. In fig. 14, the first bending portion 2214 and the second bending portion 2224 are located in the matching space 240, which is not described herein.
Referring to fig. 16 and 17, a third coupling beam stirrup 250 may be provided directly on top of the second section beam 20, and the third coupling beam stirrup 250 may be rectangular in shape. Further, a ninth longitudinal bar unit 2510 is further disposed in the third coupling beam stirrup 250 to improve the strength of the concrete 320 area.
Referring to fig. 18 to 20, the first protrusion 2210 is connected to the second protrusion 2220, and a fifth longitudinal rib unit 2212 is disposed inside the first protrusion 2210, and a sixth longitudinal rib unit 2222 is disposed inside the second protrusion 2220. That is, the first bending portion 2214 is connected to the second bending portion 2224, and the connecting end is located in the matching space 240. Further, a fifth longitudinal rib unit 2212 and a seventh longitudinal rib unit 2213 corresponding to the fifth longitudinal rib unit 2212 are provided at the inner side of the first protrusion 2210, and a sixth longitudinal rib unit 2222 and an eighth longitudinal rib unit 2223 corresponding to the sixth longitudinal rib unit 2222 are provided at the inner side of the second protrusion 2220. The fifth longitudinal rib unit 2212, the sixth longitudinal rib unit 2222, the seventh longitudinal rib unit 2213, and the eighth longitudinal rib unit 2223 are convenient to provide a bending fulcrum for the connecting rib 220, so that the prefabrication efficiency is improved.
Further, for the wall panel, the first section girder 10 and the second section girder 20 are provided with the prefabricated floor 310 on both sides of the top or are provided with the prefabricated floor 310 on one side, which is not limited herein.
It should be noted that, for the second section beam 20, the connection stirrup 280 (see fig. 16) may be preset on both sides of the cavity 210, but the connection stirrup 280 does not extend into the cavity 210. In this way, the side wall of the second section beam 20 facing the cavity 210 does not need to be opened or grooved, so that the manufacturing process is simplified, and the template does not need to be opened or grooved, so that the universal purpose is realized.
In the above embodiment, the length of the first section beam 10 may be taken as the spacing of the beam stirrups in the relevant specification of the building structure, that is, the dimension of the first section beam 10 along the longitudinal direction of the beam is the spacing of the beam stirrups in the relevant specification of the building structure.
In summary, the precast coupling beam 330 of the segmental cavity provided by the embodiment of the invention comprises at least one first segmental beam 10 and at least one second segmental beam 20, and the first coupling stirrup 110 is embedded in the first segmental beam 10 to ensure the strength of the precast beam connection structure itself, while the cavity 210 is formed in the second segmental beam 20, and the coupling stirrup 220 in the cavity 210 extends at least to the concrete 320 area at the top of the first segmental beam 10 and the second segmental beam 20, i.e. the coupling stirrup 220 is used for reinforcing the connection stability between the precast beam connection structure and the concrete 320 structure and providing the shear-resistant bearing capacity of the coupling beam. So set up, do not stretch out the reinforcing bar on the prefabricated even roof beam 330 of segment cavity, need not slot or trompil on the prefabricated even roof beam 330's of preparation segment cavity the template, make things convenient for the preparation greatly.
In embodiments of the invention, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of an embodiment of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (8)

1. A precast coupling beam of a segment cavity is characterized by comprising:
the beam body comprises at least one section of first section beam and at least one section of second section beam along the length direction of the beam body, and a first connecting beam hoop is pre-embedded in the first section beam; a hole is formed in the middle of the first section beam, and the first connecting beam stirrup is sleeved outside the hole;
the second section beam is provided with a cavity from the top downwards; wherein the content of the first and second substances,
a connecting rib is arranged in the cavity and at least extends to a cast-in-place concrete area at the top of the first section beam and the second section beam; the first connecting beam stirrup and the connecting bar are used for preventing the beam body from extending out of the steel bar and enabling the prefabricated connecting beam template not to be grooved or perforated.
2. A composite beam, comprising:
a precast coupling beam of the segment cavity of claim 1; the connecting rib forms a first bulge and a second bulge on the concrete areas at the tops of the first section beam and the second section beam, and the extending direction of the first bulge is opposite to the extending direction of the second bulge; or the first projection is connected with the second projection;
and cast-in-place concrete on the top of the prefabricated coupling beam of the segment cavity.
3. The composite beam of claim 2, wherein the first section beam top is provided with a longitudinal beam rib, the concrete area poured on the first section beam top and the second section beam top is provided with a second longitudinal beam rib, and the longitudinal beam rib is positioned in the second longitudinal beam rib.
4. The composite beam defined in claim 2, wherein longitudinal ribs are provided inside the connecting ribs.
5. The composite beam according to claim 4, wherein the longitudinal bars comprise a first longitudinal bar unit group and a second longitudinal bar unit group, the first longitudinal bar unit group comprises two first longitudinal bar units which are arranged at intervals, and the second longitudinal bar unit group comprises two second longitudinal bar units which are arranged at intervals;
the concrete area on the top of the first section beam and the second section beam is provided with the first longitudinal rib unit; alternatively, the first and second electrodes may be,
the concrete area on the top of the first section beam and the second section beam is provided with the first longitudinal rib unit, and the concrete area in the cavity is provided with the second longitudinal rib unit.
6. The composite beam defined in claim 5 wherein the connector beam surrounds the first longitudinal beam element and the second longitudinal beam element.
7. The composite beam defined in claim 6, wherein a third longitudinal rib element is provided in the area of concrete poured on top of the first and second sections of beam, inside the first projection, and a fourth longitudinal rib element is provided in the area of concrete poured on top of the first and second sections of beam, inside the second projection.
8. A building structure, comprising:
prefabricating a floor slab;
the composite girder of any one of claims 2 to 7, wherein the precast floor slab is erected on one side or both sides of the precast girder of the segment cavity, and the composite girder is connected with the precast floor slab through cast-in-place concrete.
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Publication number Priority date Publication date Assignee Title
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CN203905292U (en) * 2014-06-11 2014-10-29 朱彤 Reinforced concrete prefabricated open-frame girder
CN107165336A (en) * 2017-04-26 2017-09-15 北京工业大学 A kind of combination beam and its manufacture method
CN211369257U (en) * 2019-11-29 2020-08-28 湖南远大工程设计有限公司 Precast beam
CN113374171A (en) * 2021-06-08 2021-09-10 华南理工大学 Recycled block concrete prefabricated assembled ring beam structure and construction method thereof

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2736455Y (en) * 2004-10-20 2005-10-26 吴方伯 Reinforced concrete precast unit for superposition beam
KR20100115400A (en) * 2009-04-20 2010-10-28 (주)케이에이치하우징솔루션스 Steel-concrete composite crossbeam having t-shaped beam and construction methods using the same
CN203905292U (en) * 2014-06-11 2014-10-29 朱彤 Reinforced concrete prefabricated open-frame girder
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