CN109386054B - Unbonded prefabricated assembled beam-column T-shaped joint - Google Patents

Unbonded prefabricated assembled beam-column T-shaped joint Download PDF

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Publication number
CN109386054B
CN109386054B CN201811538175.2A CN201811538175A CN109386054B CN 109386054 B CN109386054 B CN 109386054B CN 201811538175 A CN201811538175 A CN 201811538175A CN 109386054 B CN109386054 B CN 109386054B
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precast concrete
column
node
concrete beam
precast
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CN109386054A (en
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张文学
田雨毫
陈盈
张乐
左明慧
朱修福
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Beijing Guqiao Technology Co.,Ltd.
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Beijing University of Technology
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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
    • E04B1/18Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
    • E04B1/20Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of concrete, e.g. reinforced concrete, or other stonelike material
    • 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
    • E04B1/18Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
    • E04B1/20Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of concrete, e.g. reinforced concrete, or other stonelike material
    • E04B1/21Connections specially adapted therefor
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04GSCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/12Mounting of reinforcing inserts; Prestressing
    • E04G21/121Construction of stressing jacks

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Mechanical Engineering (AREA)
  • Rod-Shaped Construction Members (AREA)
  • Joining Of Building Structures In Genera (AREA)

Abstract

The invention discloses an unbonded prefabricated assembled beam-column T-shaped node, and belongs to the technical field of structure construction. The structure comprises a precast concrete lower column, a precast concrete upper column, a precast concrete beam plate, a prestressed steel strand, a foundation structure, an anchorage device and a bolt; the structure is characterized in that a lower precast concrete column, a precast concrete beam plate and an upper precast concrete column are hoisted together from bottom to top in sequence, prestressed steel strands are pre-embedded in a foundation structure, and the structure system penetrates through a pore passage of the columns. The beam slab can be continuously placed on the upper column, tensioning is carried out on every five layers and the top end of the uppermost column, and finally bolts are applied to the adjacent precast beams. The joint of the invention uses the connection characteristics of the tenon-and-mortise of the wood structure for reference, so that the structure is more and more firm when being pressed. The prefabricated concrete has the advantages of really realizing prefabricated assembly, greatly shortening the construction period, strong bearing capacity, good overall performance, reusability, environmental protection and quite high economic benefit.

Description

Unbonded prefabricated assembled beam-column T-shaped joint
Technical Field
The invention relates to a novel connection mode of a T-shaped node of a beam column of an unbonded prefabricated frame structure, which is suitable for the design and construction of a prefabricated concrete beam plate and a prefabricated concrete column node in an assembled structure and belongs to the field of the design and construction of an assembled building.
Background
With the development of building structure industrialization, prefabricated buildings are widely applied at home and abroad due to the characteristics of simple and convenient construction, short construction period, small environmental pollution, labor saving and the like, and are also the development trend of building structures. Whether the node design of the assembled frame structure beam and column is reasonable or not only influences the service performance of the structure, but also influences the construction convenience degree. According to different construction operations, the connection mode of the assembled beam-column joint is mainly divided into wet connection and dry connection. Wet connection is with beam column prefabricated component's reservation reinforcing bar on-the-spot connection, pours the node district again, and the advantage of this kind of connection is that the wholeness is better, and is similar with cast-in-place structure, nevertheless has node core area reinforcing bar intensive, concrete vibration not closely knit, the construction shortcoming such as loaded down with trivial details relatively, and does not possess the secondary and dismantle the function of assembling. The dry connection is that steel parts are embedded in prefabricated parts, and the connection is carried out through bolts and welding during site construction, so that the construction is fast, local weak links exist, and the overall performance is poor. Therefore, a novel beam column joint form and a construction technology of an assembly type frame structure building, which are convenient for on-site assembly construction, have good overall performance and can be assembled and disassembled secondarily, need to be designed and researched.
Disclosure of Invention
The invention is a novel connection mode of the T-shaped nodes of the beam columns of the unbonded prefabricated assembly type frame structure, has the advantages of simple and convenient construction, short construction period, environmental protection, good overall performance, reliable safety and strong practicability, and can be repeatedly recycled after being disassembled.
The technical scheme adopted by the invention is that the unbonded prefabricated assembled beam-column T-shaped node is connected by using a connection mode of a mortise-tenon structure for reference. The T-shaped node comprises a precast concrete lower column 1, a precast concrete upper column 2, a precast concrete beam plate 3, a prestressed steel strand 4, a foundation structure 5, an anchorage device 6 and a bolt 7. The lower end of the prestressed steel strand 4 is anchored in the foundation structure 5, then upwards penetrates through the pore channel of the precast concrete lower column 1 to be connected with the upper structure, and penetrates through the precast concrete lower column 1 and the precast concrete upper column 2. The upper portion of precast concrete lower prop 1 is equipped with terrace with edge shape mouth, and two precast concrete beam slab 3 cards are in the upper portion terrace with edge shape mouth of precast concrete lower prop 1, and the lower part tenon of precast concrete upper prop 2 inserts in the cup mouth that four precast concrete beam slab 3 formed to press on two precast concrete beam slab 3, the contact surface between precast concrete lower prop 1, precast concrete upper prop 2, precast concrete beam slab 3 and foundation structure 5 all has certain slope, plays the effect that compresses tightly. Can form multilayer structure through the hoist and mount concatenation, adopt interim the support to fix for guaranteeing structure safety during hoist and mount. An anchorage device 6 is pre-buried at the upper end of the uppermost precast concrete upper column 2 and is used for later-stage tensioning. The bolts 7 are used to fix the two precast concrete beam panels 3.
The precast concrete upper column 2 extrudes the precast concrete beam plate 3 under the action of gravity and prestress, and the precast concrete beam plate 3 extrudes the precast concrete lower column 1 under the action of pressure and friction force, and the precast concrete upper column and the precast concrete lower column are spliced together. The contact angle of the precast concrete upper column 2 and the precast concrete beam plate 3 is alpha, the friction coefficient is mu, and in order to ensure that the node has enough safe reserve, the angle is adjusted during design so that the node is compacted.
The core component of this design can industrialization batch production, carries out the splicing of bondlessness at the job site, does not need the local pouring or the mechanical connection process after traditional prefabricated node overlap joint, has shortened construction cycle greatly, has accomplished prefabricated assembled in the true sense. And the characteristics of mortise and tenon connection are used for reference to the connection mode of the node, the node has reliable safety and integrity, and after the prestress of the top is released, the structure can be disassembled, and the components can be reused.
Drawings
FIG. 1 is a three-dimensional block diagram of the present invention.
Fig. 2 is a front view of the present invention.
Fig. 3 is a component diagram of the present invention.
Fig. 4 is a detailed view of the precast concrete upper column according to the present invention.
Fig. 5 is a detailed view of the precast concrete beam panel according to the present invention.
Fig. 6 is a detailed view of the precast concrete lower column of the present invention.
FIG. 7 is a schematic view of a mechanical model of the joint of the present invention.
In the figure: 1. prefabricating a concrete lower column; 3. Prefabricating a concrete beam plate; 2. Prefabricating a concrete upper column; 4. pre-stressed steel strands; 5. a base structure; 6. an anchorage device; 7. and (4) bolts.
Concrete construction mode
The following further description is made with reference to the accompanying drawings and detailed description.
The three-dimensional structure design diagram of the design is shown in the attached drawing 1, and the connection mode of the unbonded prefabricated assembled beam-column joint comprises a prefabricated concrete lower column 1, a prefabricated concrete upper column 2, a prefabricated concrete beam plate 3, prestressed steel strands 4, a foundation structure 5, an anchorage device 6 and bolts 7. The precast concrete lower column 1, the precast concrete beam plate 3 and the precast concrete upper column 2 are hoisted together, a node is formed by means of good extrusion of gravity and the angle of a joint, and a prestressed steel strand 4 pre-embedded in the foundation structure 5 penetrates through the precast concrete column. The anchorage device 6 is pre-embedded at the top of the top precast concrete upper column 2, and the prestressed steel strand is tensioned at the later stage. The bolts 7 are used to fix the two precast concrete beam panels 3, enhancing the integrity thereof.
During specific construction, prestressed steel strands are embedded in a foundation structure and penetrate through a pore of a precast concrete column, a tenon of a bottom column is inserted into a cup opening of the foundation, redundant steel strands are reserved on the upper portion of the bottom column and used for continuously connecting an upper structure, then two precast concrete beam plates required by a T-shaped node are hoisted to a top end frustum opening of the bottom column, the precast concrete column with the tenon penetrates through the steel strands and is inserted into a cup opening formed by the two precast concrete beam plates 3 and pressed on the two precast concrete plates to form a compact system, the tenon is wider than the cup opening formed by splicing the two precast concrete beam plates, and thus, under the action of finally applying prestress, the tenon extrudes the beam plates and the beam plates extrude the column, so that the node is firmer. The multilayer structure is spliced according to the steps, temporary support is adopted when the multilayer structure is spliced to guarantee the safety of the structure, the jack is used for tensioning once every five layers, then the steel strand connector is adopted for connection, the splicing is continued, and tensioning and anchoring are carried out again on the top layer. And finally, bolts are used for fixing holes of adjacent precast beams, so that the structure has better integrity.
When the structure is disassembled, the prestress of the top part is released, and then the structure can be disassembled in sequence for repeated use.
The above-mentioned technical solutions are only technical solutions of the present invention, and the present invention is not limited in any way, and any modifications, equivalent variations and modifications made within the spirit and principle of the present invention without departing from the technical spirit of the present invention should be regarded as the technical scope of the present invention, and shall be included in the protection scope of the present invention.

Claims (4)

1. Prefabricated assembled beam column T shape node of unbonded, its characterized in that: the T-shaped node comprises a precast concrete lower column (1), a precast concrete upper column (2), a precast concrete beam plate (3), a prestressed steel strand (4), a foundation structure (5), an anchorage device (6) and a bolt (7); the lower end of the prestressed steel strand (4) is anchored in the foundation structure (5), then upwards penetrates through a pore channel of the precast concrete lower column (1) to be connected with the upper structure, and penetrates through the precast concrete lower column (1) and the precast concrete upper column (2); the upper part of the precast concrete lower column (1) is provided with a frustum pyramid-shaped opening, the two precast concrete beam plates (3) are clamped in the frustum pyramid-shaped opening at the upper part of the precast concrete lower column (1), the tenon at the lower part of the precast concrete upper column (2) is inserted into a cup opening formed by the four precast concrete beam plates (3) and is pressed on the two precast concrete beam plates (3), and contact surfaces among the precast concrete lower column (1), the precast concrete upper column (2), the precast concrete beam plates (3) and the foundation structure (5) have certain gradients, so that the compression effect is realized; a multilayer structure can be formed by hoisting and splicing, and temporary supports are adopted for fixing in order to ensure the structure safety during hoisting; an anchorage device (6) is pre-embedded at the upper end of the uppermost precast concrete upper column (2) and is used for later tension; the bolts (7) are used for fixing the two precast concrete beam plates (3).
2. The unbonded prefabricated assembled beam-column T-shaped joint of claim 1, wherein: the precast concrete upper column (2) extrudes the precast concrete beam plate (3) under the action of gravity and prestress, and the precast concrete beam plate (3) extrudes the precast concrete lower column (1) under the action of pressure and friction and is spliced together; the contact angle of the precast concrete upper column (2) and the precast concrete beam plate (3) is alpha, the friction coefficient is mu, and in order to ensure that the node has enough safety reserve, the angle is adjusted during design so that the node is compacted.
3. The unbonded prefabricated assembled beam-column T-shaped joint of claim 1, wherein: the precast concrete lower column (1), the precast concrete beam plate (3) and the precast concrete upper column (2) are hoisted together, and are extruded together well by means of gravity and the angle of a connecting part to form a node, and a prestressed steel strand (4) pre-embedded in a foundation structure (5) penetrates through the precast concrete column; an anchorage device (6) is pre-embedded at the top of the top precast concrete upper column (2), and the prestressed steel strand is tensioned at the later stage; the bolts (7) are used for fixing the two precast concrete beam plates (3) and enhancing the integrity of the precast concrete beam plates.
4. The unbonded prefabricated assembled beam-column T-shaped joint of claim 1, wherein: during specific construction, pre-stressed steel strands are pre-buried in a foundation structure and penetrate through a pore passage of a precast concrete column, a tenon of a bottom column is inserted into a cup opening of the foundation, redundant steel strands are reserved on the upper portion of the bottom column and used for continuously connecting an upper structure, then two precast concrete beam plates required by a T-shaped node are hoisted to a frustum opening at the top end of the bottom column, the precast concrete column with the tenon penetrates through the steel strands and is inserted into a cup opening formed by the two precast concrete beam plates (3) and pressed on the two precast concrete plates to form a compact system, and the tenon is wider than the cup opening formed by splicing the two precast concrete beam plates, so that the tenon extrudes the beam plates and the beam plates extrude the column under the action of finally applied prestress, and the node is firmer; sequentially splicing the multilayer structures, adopting temporary support to ensure the safe multilayer splicing of the structure, tensioning once by using a jack every five layers, then adopting a steel strand connector for connection, continuously splicing, and tensioning and anchoring the top layer; finally, bolts are used for fixing holes of adjacent precast beams, so that the structure has better integrity;
when the structure is disassembled, the prestress of the top part is released, and then the structure can be disassembled in sequence for repeated use.
CN201811538175.2A 2018-12-16 2018-12-16 Unbonded prefabricated assembled beam-column T-shaped joint Active CN109386054B (en)

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CN110271768A (en) * 2019-07-09 2019-09-24 中建桥梁有限公司 A kind of assembled multilayer material stacking device
EP4402324A1 (en) * 2021-09-15 2024-07-24 Cscon S.R.L. Prefabricated building structure

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CN103898985B (en) * 2014-02-21 2016-04-20 同济大学 A kind of beam column ball pivot node
CN104264782B (en) * 2014-10-29 2016-08-24 中国建筑第八工程局有限公司 Assembled integral pre-stressed concrete frame structure and construction method thereof
CN206128292U (en) * 2016-08-30 2017-04-26 赵挺生 Prefabricated node and prefabricated fabricated frame structure
CN207553612U (en) * 2017-03-31 2018-06-29 中民筑友科技投资有限公司 It is a kind of for the wallboard of low layer assembled architecture and the combined member of frame
CN208023621U (en) * 2018-03-05 2018-10-30 深圳市路桥建设集团有限公司 A kind of assembled piping lane joint waterproofing structure
CN108179809A (en) * 2018-03-15 2018-06-19 莆田学院 The connection method of assembled steel tendon concrete frame structure component

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Effective date of registration: 20210207

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Patentee before: Beijing University of Technology