CN115404999A - Beam-slab-column assembly type cross joint connected by steel wedges - Google Patents

Beam-slab-column assembly type cross joint connected by steel wedges Download PDF

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Publication number
CN115404999A
CN115404999A CN202211262561.XA CN202211262561A CN115404999A CN 115404999 A CN115404999 A CN 115404999A CN 202211262561 A CN202211262561 A CN 202211262561A CN 115404999 A CN115404999 A CN 115404999A
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China
Prior art keywords
column
slab
prefabricated
steel
hole
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Chinese (zh)
Inventor
张昊然
张文学
王军伟
张�成
罗震
吴晨阳
赵雨晴
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Beijing University of Technology
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Beijing University of Technology
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Priority to CN202211262561.XA priority Critical patent/CN115404999A/en
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    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/38Connections for building structures in general
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/38Connections for building structures in general
    • E04B1/41Connecting devices specially adapted for embedding in concrete or masonry
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/38Connections for building structures in general
    • E04B1/58Connections for building structures in general of bar-shaped building elements
    • E04B1/5825Connections for building structures in general of bar-shaped building elements with a closed cross-section
    • E04B1/5831Connections for building structures in general of bar-shaped building elements with a closed cross-section of substantially rectangular form
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04CSTRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C2/00Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
    • E04C2/02Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
    • E04C2/04Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of concrete or other stone-like material; of asbestos cement; of cement and other mineral fibres
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04CSTRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C2/00Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
    • E04C2/30Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04CSTRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00Structural elongated elements designed for load-supporting
    • E04C3/30Columns; Pillars; Struts
    • E04C3/34Columns; Pillars; Struts of concrete other stone-like material, with or without permanent form elements, with or without internal or external reinforcement, e.g. metal coverings

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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 discloses a beam slab column assembly type cross joint connected by steel wedges, which comprises: a cylinder unit; four beam plates matched with the column units; all be provided with first opening on every beam slab, inwards extend to open on two inner walls of first open-ended and respectively be equipped with a first cell body, four beam slab parallel arrangement concatenations form the second opening, the second opening part is arranged in to the cylinder unit, it has a plurality of prefabricated component group to prefabricate in the cylinder unit, every prefabricated component group includes a pair of prefab, first cell body is used for placing the prefab, the cylinder unit, the through-hole has all been seted up on the beam slab, the steel wedge passes the through-hole and fixes beam slab and the prefabricated component group in the cylinder unit, the opening direction of through-hole is perpendicular with the opening direction of first cell body, two first cell body set up perpendicularly. The invention has reasonable stress of the structure, clear force transmission path, extremely simple and convenient construction, industrialized mass production, detachable characteristic, recycling and high economic benefit and environmental benefit.

Description

Beam-slab-column assembly type cross joint connected by steel wedge
Technical Field
The invention belongs to the technical field of assembly type buildings, and particularly relates to a beam slab column assembly type cross joint connected by steel wedges.
Background
The traditional cast-in-place structure is taken as a main structural form, has the defects of long construction period, low industrialization degree, serious environmental pollution and the like, and does not accord with the national policy of energy conservation and emission reduction, and the prefabricated assembly type building is widely accepted at home and abroad in recent years due to the characteristics of convenient construction, high construction speed and good environmental benefit, and gradually replaces the traditional cast-in-place structure. The beam column node becomes the research focus as the main atress part, and the assembled beam column node connection at present divide into wet-type connection and dry-type connection two kinds, and wet-type connection is that some components are prefabricated, uses the cast-in-place connection of concrete on the scene, though the wholeness is better, but has the construction difficulty, the concrete is difficult to vibrate closely knit shortcoming. At present, dry type connection is characterized in that all components are prefabricated in a factory and connected in a mode of bolts, prestressed steel strands, groove keys, welding and the like on site, but the dry type connection has the problems of high precision requirement on prefabricated components and poor ductility.
Disclosure of Invention
The invention aims to provide a beam-slab-column assembled cross node connected by steel wedges, which is used for solving the problems of high precision requirement and poor ductility of beam-column assembled node prefabricated parts in the prior art.
In order to achieve the above object, the present invention provides a beam-slab-column assembled cross joint connected by steel wedges, comprising: a cylinder unit; four beam plates matched with the column units;
each beam plate is provided with a first opening, two inner walls of each first opening extend inwards to form a first groove body, four beam plates are arranged in parallel and spliced to form a second opening, the column unit is arranged at the second opening, a plurality of prefabricated part sets are prefabricated in the column unit, each prefabricated part set comprises a pair of prefabricated parts, the first groove bodies are used for placing the prefabricated parts, through holes are formed in the column unit and the beam plates, and the beam plates and the prefabricated part sets on the column unit are fixed through steel wedges which penetrate through the through holes;
the opening direction of the through hole is perpendicular to the opening direction of the first groove bodies, and the two first groove bodies are arranged perpendicularly.
Optionally, the column unit includes an upper column and a lower column, and the upper column is in contact connection with the lower column.
Optionally, the prefabricated part group includes an upper prefabricated part and a lower prefabricated part, the upper prefabricated part is embedded in the upper column, and the lower prefabricated part is embedded in the lower column.
Optionally, at least one fixing part is embedded in the beam plate, and the fixing part is parallel to the first groove body.
Optionally, the fixing piece is pre-embedded in the inner side of each first groove body, and the thickness of each first groove body is half of that of the prefabricated member.
Optionally, the fixing member is parallel to the first groove body.
Optionally, the upper prefabricated member includes four first support plates arranged perpendicular to each other, and each of the first support plates is provided with a through hole; the lower prefabricated member comprises four second support plates and first flange plates which are vertically arranged, each second support plate is provided with a through hole, and the first flange plates and the second support plates are vertically arranged.
Optionally, the fixing piece is provided with a through hole matched with the cylinder unit in size and shape.
Optionally, the through hole of the lower preform forms a notch with a height lower than the height of the notch below the beam plate to form a height difference, and the through hole of the upper preform forms a notch with a height higher than the height of the notch below the beam plate to form a height difference.
The invention has the technical effects that: the invention has reasonable stress of the structure, clear force transmission path, extremely simple and convenient construction, industrialized mass production, detachable characteristic, recycling and high economic benefit and environmental benefit.
Drawings
In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed to be 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 it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic three-dimensional structure diagram of a beam-slab-column assembled cross node connected by a steel wedge according to an embodiment of the present invention;
FIG. 2 is an exploded schematic view of a three-dimensional structure of a beam-slab-column assembled cross joint connected by steel wedges according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of an upper column according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a lower column according to an embodiment of the present invention;
FIG. 5 is a schematic view of a beam and slab construction provided by an embodiment of the present invention;
FIG. 6 is a cross-sectional view of a beam panel provided in accordance with an embodiment of the present invention;
FIG. 7 is a schematic structural view of an upper preform provided in accordance with an embodiment of the present invention;
FIG. 8 is a schematic structural view of a lower preform provided in an embodiment of the present invention;
FIG. 9 is a schematic structural diagram of a fixing member according to an embodiment of the present invention;
FIG. 10 is a schematic structural diagram of a steel wedge provided in accordance with an embodiment of the present invention;
FIG. 11 is a diagram of a steel wedge joining process according to one embodiment of the present invention;
reference numerals are as follows:
1. putting the column on; 2. column descending; 3. a beam plate; 4. steel wedge; 5. an upper prefabricated part; 5.1, a first support plate; 6. a lower prefabricated part; 6.1, a second support plate; 6.2 a flange plate; 7. a fixing member; 8. a first tank body; 9. and a through hole.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.
A beam-slab-column assembled cross joint of the present invention using steel wedge joining is described below with reference to fig. 1-11.
As shown in fig. 1-6, the present embodiment provides a beam-slab-column assembled cross joint connected by steel wedges, comprising: a cylinder unit; four beam plates 3 matched with the column units;
each beam plate 3 is provided with a first opening, two inner walls of the first opening are inwards extended and provided with a first groove 8, four beam plates 3 are arranged in parallel and spliced to form a second opening, the column unit is arranged at the second opening, a plurality of prefabricated part sets are prefabricated in the column unit, each prefabricated part set comprises a pair of prefabricated parts, the first groove 8 is used for placing the prefabricated parts, the column unit and the beam plates 3 are provided with through holes 9, and the steel wedges 4 penetrate through the through holes 9 to fix the beam plates 3 and the prefabricated part sets on the column unit;
the opening direction of the through hole 9 is perpendicular to the opening direction of the first groove bodies 8, and the two first groove bodies 8 are perpendicular to each other.
The column unit comprises an upper column 1 and a lower column 2, wherein the upper column 1 is in contact connection with the lower column 2.
In this embodiment, the upper column 1 and the lower column 2 may be prefabricated from concrete, as shown in fig. 3-4, the bottom of the upper column 1 is provided with a protrusion, the protrusion may be spherical, hemispherical, columnar, tetrahedral, etc., and the top of the lower column 2 is provided with a groove, preferably a spherical or hemispherical groove, matching the shape and size of the protrusion, during installation, the upper column 1 is hoisted into the spherical groove of the lower column 2, and a temporary node is formed by gravity and the radian in the groove. The beam slab 3 is made of precast concrete. The first opening is a rectangular opening formed in the inner side of the beam plate 3 and can be attached to a column wall. Four beam slabs of horizontal direction cooperate laminating column wall each other, only need the contact surface overlap joint between upper prop 1 and the lower prop 2, need not to connect, just can fasten upper prop 1, lower prop 2 and beam slab 3 together, form the cross node, the structure takes shape fast, the construction is simple and convenient, the production precision requirement to prefabricated component is low, can carry out industrialization batch production, better wholeness and security have, and after releasing the steel wedge fastening force, structural component can dismantle, used repeatedly.
The multilayer structure is formed by splicing the upper column 1 and the lower column 2 in the above step.
Further, the upper and lower columns 1 and 2 are long enough to be installed with a plurality of first beam plates 3 to form a multi-storey floor structure.
Further, the projection of the upper column 1 conforms to the following formula:
Figure BDA0003891778940000051
in the formula: f. of vd Is the shear strength of the concrete; a. The c Is the cross-sectional area of the tip.
In an alternative embodiment, as shown in fig. 7-8, the set of preforms comprises an upper preform 5 and a lower preform 5, the upper preform 5 being partially embedded in an upper column, and the lower preform 5 being partially embedded in the lower column.
In this embodiment, the upper and lower prefabricated members 5 and 6 are buried in the column unit in advance and made of steel plates. Wherein, the length of the single-side extension of the lower prefabricated member 6 is at least half of the height of the beam, and the width of the single-side extension does not exceed the width of the beam.
Further, the upper preform 5 and the lower preform 6 comply with the following formula:
Figure BDA0003891778940000061
f v b g h g ≥N g
in the formula: f. of d Is a steel plate tensile strength design value; f. of v Is a steel plate shear strength design value; b is a mixture of g Is the thickness of the steel plate; h is g Is the steel plate height;
M g is a bending moment design value; n is a radical of hydrogen g Is a shear design value;
wherein:
Figure BDA0003891778940000062
Figure BDA0003891778940000063
in the formula: a. The s Is the area of the single-side tensioned steel bar; f. of sd Is the design value of tensile strength of the tensioned steel bar;
ρ sv is the reinforcement ratio f of the stirrup sv Is the tensile strength design value of the stirrup; l is a radical of an alcohol 1 The horizontal distance from the tension steel bar to the center line of the column; l is 2 Is the horizontal distance from the center of the steel wedge to the center line of the column; b is the pillar width; h is a total of 1 The vertical distance from the wedge center of the steel plate to the upper edge of the steel plate; h is 2 Is the vertical distance from the steel wedge center to the lower edge of the steel plate;
in an alternative embodiment, as shown in fig. 9, at least one fixing member 7 is embedded in the beam plate 3, and the fixing member 7 is arranged in parallel with the first trough body 8. In this embodiment, the fixing member 7 is made of a steel plate. At least two through holes 9 are formed in the fixing piece 7, and at least four through holes 9 are formed in the beam plate 3.
Further, the fixing piece 7 is pre-embedded in the inner side of each first groove body 8, and the thickness of each first groove body 8 is half of the thickness of the prefabricated part. In this embodiment, the number of the fixing members 7 embedded in each side is one.
Further, the fixing member 7 is arranged in parallel with the first groove 8.
In an alternative embodiment, the upper prefabricated member 5 includes four first support plates 5.1 arranged perpendicularly to each other, and each of the first support plates 5.1 is provided with a through hole 9; the lower prefabricated member 5 comprises four second support plates 6.1 and first flange plates which are vertically arranged, each second support plate 6.1 is provided with a through hole 9, each first flange plate and each second support plate 6.1 are vertically arranged, and each flange plate 6.2 is fixedly arranged on the lower surface of each second support plate 6.1.
Furthermore, the fixing part 7 is provided with a through hole 9 matched with the size and shape of the column unit. As shown in fig. 10, the lower end of the steel wedge 4 is threaded to enable a nut to be screwed in.
During the installation, beam slab 3 hoists on flange board 6.2, the post wall is hugged closely to the inboard, make the fillet rectangle notch of prefab 5 and 6 through-holes departments of prefab down align with beam slab 3, steel wedge 4 has certain slope, can beat through inwards, play the effect of compressing tightly, with two steel wedges 4 in fillet rectangle notch department to wearing, with last post 1, lower post 2 is through last prefab 5, lower prefab 6 compresses tightly with adjacent beam slab 3, it is unified whole to connect into, steel wedge 4 one end is with screwing up the nut, support each other, prevent that steel wedge 4 from sliding. According to the method, the multi-layer structure can be formed by hoisting and splicing, and the temporary support can be used for fixing during hoisting, so that the structure safety is ensured. When the steel wedge is disassembled, the nut at one end of the steel wedge can be unscrewed, the steel wedge is knocked out, and the structure is sequentially unloaded.
In an alternative embodiment, the through holes of the lower preform 5 form a notch having a height forming level difference lower than the height of the lower notch in the beam plate 3, and the through holes of the upper preform 5 form a notch having a height forming level difference higher than the height of the lower notch in the beam plate 3.
Specifically, as shown in fig. 11, the height of the rounded rectangular notch formed by the through hole of the lower prefabricated member 6 is slightly lower than the height of the lower notch in the beam slab 3, the height of the rounded rectangular notch of the upper prefabricated member 5 is slightly higher than the height of the upper notch in the beam slab 3, the steel wedge 4 has a top slope, and in the process of driving the steel wedge 4 into the notch, the steel wedge 4 will abut against the upper end of the notch of the lower prefabricated member 6 and abut against the lower end of the lower notch in the beam slab 3, and gradually compress until the lower column 2 and the beam slab 3 are firmly spliced together; the steel wedge 4 can support against the lower end of the notch of the upper prefabricated part 5 and against the upper end of the notch above the beam plate 3, and the steel wedge is gradually compressed until the upper column 1 and the beam plate 3 are firmly spliced together. The method can combine the upper column 1, the lower column 2 and the beam slab 3 to form a firm node under the fastening action of the steel wedges 4. Go up prefab 5, lower prefab 6 and beam slab notch difference in height be x, and the domatic angle of steel wedge is alpha, for guaranteeing that the node has sufficient safe deposit, can adjust notch difference in height and the domatic angle of steel wedge during the design and make the node fasten more.
Furthermore, the first support plate 5.1, the second support plate 6.1 and the flange plate 6.2 are provided with holes for stirrups and reinforcing steel bars.
In this embodiment, a fixing member 7 is embedded in one side of each first groove 8.
In an alternative embodiment, the steel wedge conforms to the following equation:
Figure BDA0003891778940000081
Figure BDA0003891778940000082
in the formula: f. of t Is the design value of the tensile strength of the steel wedge; a. The x Is the steel wedge area; n is a radical of x The shear resistance and the bearing capacity of the steel wedge are improved;
wherein:
N x =min{2A x f v ,db g f d }
in the formula: d is the steel wedge height; f. of d Is the design value of the tensile strength of the steel wedge; f. of v Is the designed shear strength value of the steel wedge.
Further, in the assembling method, the cross sections of the precast concrete columns are all rectangular, and the cross section size of the precast concrete columns is changed according to specific actual requirements without specified requirements; the cross-shaped steel plate of the upper column and the cross-shaped T-shaped steel plate of the lower column are rectangular steel plates, and the cross-sectional sizes of the steel plates can be selected according to actual conditions and specifications without making specified requirements.
Further, steel wedge size, fillet rectangle notch size all select according to the actual demand, do not do the specification requirement.
In the description of the embodiments of the present invention, it should be noted that the terms "central", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, 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.
In the description of the present specification, reference to the description of "one embodiment", "first-aspect embodiment", "some embodiments", "example", "specific example", or "some examples", etc., means 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 (9)

1. The utility model provides an adopt beam slab post assembled cross node that steel wedge connected which characterized in that includes: a cylinder unit; four beam plates matched with the column units;
each beam plate is provided with a first opening, two inner walls of each first opening extend inwards to form a first groove body, four beam plates are arranged in parallel and spliced to form a second opening, the column unit is arranged at the second opening, a plurality of prefabricated part sets are prefabricated in the column unit, each prefabricated part set comprises a pair of prefabricated parts, the first groove bodies are used for placing the prefabricated parts, through holes are formed in the column unit and the beam plates, and the beam plates and the prefabricated part sets on the column unit are fixed through steel wedges which penetrate through the through holes;
the opening direction of the through hole is perpendicular to that of the first groove bodies, and the two first groove bodies are perpendicular to each other.
2. The beam-slab-column assembled cross node connected by the steel wedges according to claim 1, wherein the column unit comprises an upper column and a lower column, and the upper column is in contact connection with the lower column.
3. The beam-slab-column assembled cross node connected by the steel wedge as claimed in claim 2, wherein the prefabricated member group comprises an upper prefabricated member and a lower prefabricated member, the upper prefabricated member is partially embedded in an upper column, and the lower prefabricated member is partially embedded in a lower column.
4. The beam-slab-column assembled cross joint connected by the steel wedge as claimed in claim 3, wherein at least one fixing member is embedded in the beam slab, and the fixing member is arranged in parallel with the first tank body.
5. The beam-slab-column assembled cross joint connected by the steel wedges as claimed in claim 4, wherein the fixing member is pre-embedded in the inner side of each first groove body, and the thickness of each first groove body is half of that of the prefabricated member.
6. The beam-slab-column assembled cross joint connected by the steel wedges as claimed in claim 4, wherein the fixing pieces are arranged in parallel with the first groove body.
7. The beam-slab-column assembled cross joint connected by the steel wedges as claimed in claim 4, wherein the upper prefabricated member comprises four first support plates arranged perpendicularly to each other, and each first support plate is provided with a through hole; the lower prefabricated member comprises four second support plates and first flange plates which are vertically arranged, each second support plate is provided with a through hole, and the first flange plates and the second support plates are vertically arranged.
8. The beam-slab-column assembled cross node connected by the steel wedge as claimed in claim 7, wherein the fixing member is provided with a through hole matching with the size and shape of the column unit.
9. The beam-slab-column assembled cross node connected by the steel wedge as claimed in claim 8, wherein the through hole of the lower prefabricated member forms a notch with a height forming difference lower than that of the lower notch in the beam slab, and the through hole of the upper prefabricated member forms a notch with a height forming difference higher than that of the lower notch in the beam slab.
CN202211262561.XA 2022-10-14 2022-10-14 Beam-slab-column assembly type cross joint connected by steel wedges Pending CN115404999A (en)

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