CN112196107A - A prefabricated steel-concrete primary and secondary beam connecting node - Google Patents
A prefabricated steel-concrete primary and secondary beam connecting node Download PDFInfo
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- CN112196107A CN112196107A CN202011194617.3A CN202011194617A CN112196107A CN 112196107 A CN112196107 A CN 112196107A CN 202011194617 A CN202011194617 A CN 202011194617A CN 112196107 A CN112196107 A CN 112196107A
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/30—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts being composed of two or more materials; Composite steel and concrete constructions
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/185—Connections not covered by E04B1/21 and E04B1/2403, e.g. connections between structural parts of different material
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Abstract
本发明公开了一种预制装配式型钢混凝土主次梁连接节点，涉及装配式建筑技术领域，包括预制主梁和预制次梁，预制主梁的侧面上设有块状缺口，块状缺口处对称固定有两个L形结构，L形结构包括水平部和竖直部，两个竖直部之间具有主梁条形缝隙，预制次梁的一端设有次梁端部外伸工字型钢骨架，次梁端部外伸工字型钢骨架的腹板下端两侧与下翼缘板之间设有两个相互平行的次梁条形缝隙，次梁端部外伸工字型钢骨架的腹板固定于主梁条形缝隙上，两个竖直部分别插入两个次梁条形缝隙内，次梁端部外伸工字型钢骨架的上翼缘板固定于两个水平部远离竖直部的一面上。本发明连接牢固可靠并且简化现场施工工序。
The invention discloses a prefabricated prefabricated steel-concrete primary and secondary beam connection node, which relates to the technical field of prefabricated buildings and includes a prefabricated primary beam and a prefabricated secondary beam. Two L-shaped structures are fixed. The L-shaped structure includes a horizontal part and a vertical part. There is a main beam strip gap between the two vertical parts. , There are two parallel sub-beam strip gaps between the two sides of the lower end of the web of the I-shaped steel skeleton at the end of the secondary beam and the lower flange plate, and the web of the I-shaped steel skeleton at the end of the secondary beam is extended. It is fixed on the strip-shaped gap of the main beam, and the two vertical parts are respectively inserted into the strip-shaped gaps of the two secondary beams. on the side. The invention has firm and reliable connection and simplifies on-site construction procedures.
Description
Technical Field
The invention relates to the technical field of assembly type buildings, in particular to a prefabricated assembly type steel reinforced concrete primary and secondary beam connecting node.
Background
In recent years, the country actively promotes green buildings and building materials, vigorously develops prefabricated building, accelerates standardized construction, and improves the technical level of buildings and the engineering quality. The aim is to strive for about 10 years, so that the prefabricated building accounts for 30% of the newly built building. The fabricated concrete building is mainly produced in a factory, and high-strength materials are generally used, so that the building is developed towards modularization and standardization. Compared with the traditional concrete structure, the prefabricated concrete structure has the advantages of high production efficiency, good labor condition of workers, environmental protection, material saving, less field operation amount, good product quality and the like.
In the design of building structures, node design is a key point. Similarly, for prefabricated structures, the connection nodes between the component modules have a significant effect on the overall performance of the structure, and therefore the reliability of the node connections is of great importance.
In the prefabricated concrete structure, the connection of prefabricated parts is divided into two types, one is prefabricated integral connection, namely wet connection; the other is a fully assembled connection, also known as a dry or flexible connection. In the assembly type building construction, the connection position of prefabricated parts is the difficult point of construction, and the cast-in-place work of the node is difficult to support a formwork, low in precision and influenced in assembly efficiency and appearance quality. At present, wet connection modes such as post-cast concrete connection, sleeve grouting connection and the like are mostly adopted for connection of primary and secondary beams and beams in an assembly type building, but the defects that formwork support is difficult, the precision is low, the assembly efficiency and the appearance quality are affected and the like are usually caused in the cast-in-place work of nodes.
The defects that the primary and secondary beam node connection of the existing prefabricated building has:
(1) at present, most of prefabricated building node connections adopt a sleeve grouting connection mode, the sleeve grouting connection needs to be connected integrally through cast-in-place, the construction process is relatively complex, concrete needs to be maintained, and the construction period is long.
(2) The joint connecting part is provided with a plurality of and dense binding steel bars, which brings a difficult problem for concrete pouring, and the compactness of the cast-in-place concrete is difficult to ensure.
(3) Concrete is poured after the beam column connection node needs to be manually erected with a template, the template support at the node is a difficult problem, time and labor are wasted, the construction difficulty is high, and the connection quality and the appearance quality are not guaranteed.
(4) The cast-in-place connection of the overhanging reinforcing steel bars is disordered and complicated, and the transportation and the on-site arrangement are inconvenient.
Therefore, a new primary and secondary beam joint structure is urgently needed in the market for solving the problems.
Disclosure of Invention
The invention aims to provide a prefabricated assembly type steel reinforced concrete primary and secondary beam connecting node, which is used for solving the technical problems in the prior art and provides a full-dry type connecting mode of the primary and secondary beams, so that the firm and reliable connection is ensured, the field construction process is simplified, and the construction period is shortened.
In order to achieve the purpose, the invention provides the following scheme:
the invention discloses a prefabricated assembly type steel reinforced concrete primary and secondary beam connecting node, which comprises a prefabricated main beam and a prefabricated secondary beam, a block-shaped gap is arranged on the side surface of the prefabricated main beam, two symmetrically fixed L-shaped structures are arranged at the block-shaped gap, the L-shaped structure comprises a horizontal part and a vertical part, a main beam strip-shaped gap is arranged between the two vertical parts, one end of the prefabricated secondary beam is provided with an I-shaped steel skeleton extending outwards from the end part of the secondary beam, two strip-shaped gaps of the secondary beam parallel to each other are arranged between the two sides of the lower end of a web plate of the I-shaped steel skeleton extending outwards from the end part of the secondary beam and the lower flange plate, the web plate of the I-shaped steel skeleton extending outwards from the end part of the secondary beam is fixed on the strip-shaped gap of the main beam, the two vertical parts are respectively inserted into the strip-shaped gaps of the secondary beams, and an upper flange plate of the I-shaped steel skeleton extending outwards from the end part of the secondary beam is fixed on one surface of the two horizontal parts far away from the vertical part.
Preferably, the precast main beam comprises a main beam concrete body and a main beam I-shaped steel framework, wherein the main beam I-shaped steel framework is fixed in the main beam concrete body and is positioned at the block-shaped gap, and the main beam strip-shaped gap is arranged on the main beam I-shaped steel framework.
Preferably, the vertical portion is an external rib plate, the external rib plate is fixed between an upper flange plate and a lower flange plate of the girder i-shaped steel framework, the upper ends of the two external rib plates are fixed on the upper flange plates of the girder i-shaped steel framework on two sides of the girder bar-shaped gap, and the lower ends of the external rib plates are fixed on the lower flange plates of the girder i-shaped steel framework.
Preferably, a plurality of first high-strength bolt holes are formed in the I-shaped steel skeleton of the main beam and the rib plate at the position of the block-shaped notch, a plurality of second high-strength bolt holes are formed in an upper flange plate and a web plate of the I-shaped steel skeleton extending outwards from the end portion of the secondary beam, the first high-strength bolt holes are opposite to the second high-strength bolt holes, and the first high-strength bolt holes and the second high-strength bolt holes are fixed through high-strength bolts.
Preferably, the steel structure beam further comprises a plurality of embedded bolts, the embedded bolts are fixed on the lower flange plate of the girder I-shaped steel framework, a plurality of third high-strength bolt holes are formed in the lower flange plate of the I-shaped steel framework extending outwards from the end part of the secondary girder, the embedded bolts penetrate through the lower surface of the block-shaped gap, and the embedded bolts are inserted into the third high-strength bolt holes.
Preferably, the prefabricated secondary beam comprises a secondary beam concrete body and a secondary beam I-shaped steel skeleton, the secondary beam I-shaped steel skeleton is fixed in the secondary beam concrete body, and one end of the secondary beam I-shaped steel skeleton is fixedly connected with one end of the secondary beam end portion extending outwards to form the I-shaped steel skeleton.
Compared with the prior art, the invention has the following technical effects:
(1) the site operation process is simplified, the installation mode is simple, the construction difficulty is low, and the construction period is shortened.
(2) And the steps of formwork support and cast-in-place are not required.
(3) The external ribbed slab at the node of the prefabricated girder is used as a transverse stiffening rib, so that the shear strength and the local compressive strength of the node are improved.
(4) The components are produced in a factory in an accurate mode, the manufacturing precision is guaranteed, the alignment is accurate, and the node connection reliability and the appearance quality are improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic structural view of a connection node of the prefabricated steel reinforced concrete primary and secondary beams according to the embodiment;
FIG. 2 is a schematic structural view of a prefabricated main beam according to the embodiment;
FIG. 3 is a schematic structural view of the precast secondary beam according to the embodiment;
FIG. 4 is a sectional view of the precast main beam of the present embodiment;
in the figure: 1-prefabricating a main beam; 2-prefabricating a secondary beam; 3-a main beam concrete body; 4-girder I-shaped steel skeleton; 5-secondary beam concrete body; 6-secondary beam I-shaped steel skeleton; 7-high strength bolts; 8-a block-shaped gap; 9-main beam strip-shaped gaps; 10-an external rib plate; 11-embedding bolts; 12-a first high-strength bolt hole; 13-extending an I-shaped steel skeleton outside the end part of the secondary beam; 14-a second high-strength bolt hole; 15-third high-strength bolt hole; 16-minor beam strip slit.
Detailed Description
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 only a part of the embodiments of the present invention, and not all of the embodiments. 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.
The invention aims to provide a prefabricated assembly type steel reinforced concrete primary and secondary beam connecting node, which is used for solving the technical problems in the prior art and provides a full-dry type connecting mode of the primary and secondary beams, so that the firm and reliable connection is ensured, the field construction process is simplified, and the construction period is shortened.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
As shown in fig. 1 to 4, the present embodiment provides a prefabricated assembly type steel reinforced concrete primary and secondary beam connection node, which includes a prefabricated primary beam 1 and a prefabricated secondary beam 2, where the prefabricated primary beam 1 and the prefabricated secondary beam 2 are vertically fixed and have a T-shaped structure. The prefabricated main beam 1 and the prefabricated secondary beam 2 are both rectangular block structures. The side of the prefabricated main beam 1 is provided with a block-shaped gap 8, and the block-shaped gap 8 is a rectangular block-shaped structure. Cubic breach 8 department is equipped with the L shape structure of two reverse installations, and L shape structure is the same with L template structure, and L shape structure includes horizontal part and vertical portion, and two vertical portions are fixed in the adjacent one side of two horizontal parts, have girder bar gap 9 between two vertical portions. One end of the prefabricated secondary beam 2 is provided with an I-shaped steel skeleton 13 extending outwards from the end part of the secondary beam, (the I-shaped steel skeleton comprises an upper flange plate, a web plate and a lower flange plate which are common knowledge of technicians in the field), the width of the upper flange plate and the lower flange plate of the I-shaped steel skeleton 13 extending outwards from the end part of the secondary beam is less than the width of the block-shaped gap 8, the height from the bottom of the block-shaped gap 8 to the upper flange plate of the I-shaped steel skeleton 13 extending outwards from the end part of the secondary beam is equal to the sum of the web plate height of the I-shaped steel skeleton 13 extending outwards from the end part of the secondary beam and the thickness of the lower flange plate, two parallel secondary beam strip-shaped gaps 16 are formed between the two sides of the lower end of the web plate of the I-shaped steel skeleton 13 extending outwards from the end part of the secondary beam and the lower flange plate, the web plate width of the, two vertical portions are respectively inserted into two secondary beam strip-shaped gaps 16, the width of each secondary beam strip-shaped gap 16 is slightly larger than that of each vertical portion, and an upper flange plate of the I-shaped steel framework 13 extending outwards from the end portion of each secondary beam is fixed on one surface, far away from the vertical portions, of the two horizontal portions.
For the structure of the prefabricated main beam 1, in this embodiment, the prefabricated main beam 1 includes a main beam concrete body 3 and a main beam i-shaped steel framework 4, and the main beam i-shaped steel framework 4 is fixed in the main beam concrete body 3, that is, a horizontal portion in the L-shaped structure is a portion of the main beam i-shaped steel framework 4. The girder I-shaped steel skeleton 4 positioned at the block-shaped gap 8 is provided with a girder strip gap 9, namely, the girder I-shaped steel skeleton 4 is also provided with a gap and is connected with the girder strip gap 9 into a whole. The extension length of the I-shaped steel frame 13 extending outwards from the end part of the secondary beam is 1/2 the width of the main beam concrete body 3 minus the thickness of a web plate of the 1/2 main beam I-shaped steel frame 4.
Further, in this embodiment, the vertical portion is an external rib plate 10, the external rib plate 10 is fixed between an upper flange plate and a lower flange plate of the i-shaped steel skeleton 4 of the girder, and serves as a transverse stiffening rib to increase the shear strength and the local bearing pressure at the joint of the joint, and the external rib plate 10 and the i-shaped steel skeleton 4 of the girder may be of an integrated structure or may be fixed by subsequent welding. The width of a main beam strip gap 9 between the external rib plates 10 is slightly larger than the thickness of a web plate of an external I-shaped steel framework 13 at the end part of the secondary beam, the upper ends of the two external rib plates 10 are fixed on the upper flange plates of the main beam I-shaped steel frameworks 4 at the two sides of the main beam strip gap 9, the lower ends of the external rib plates 10 are fixed on the lower flange plates of the main beam I-shaped steel frameworks 4, and the main beam strip gap 9 does not need to be arranged on the lower flange plates of the main beam I-shaped steel frameworks 4.
Regarding the connection mode of the secondary beam end portion overhanging i-shaped steel framework 13 and the L-shaped structure, in this embodiment, a plurality of first high-strength bolt holes 12 are arranged on the main beam i-shaped steel framework 4 and the external rib plate 10 which are located at the block-shaped notch 8, a plurality of second high-strength bolt holes 14 are arranged on the upper flange plate and the web plate of the secondary beam end portion overhanging i-shaped steel framework 13, the plurality of first high-strength bolt holes 12 and the plurality of second high-strength bolt holes 14 are opposite, the first high-strength bolt holes 12 and the second high-strength bolt holes 14 are fixed through the high-strength bolts 7, and the secondary beam end portion overhanging i-shaped steel framework 13 and the L-shaped structure are fixed through the high-strength bolts 7, and a person skilled in the art can set the specific number and positions of the high-strength bolts.
To the fixed mode of the lower flange plate of the overhanging i-shaped steel skeleton 13 of secondary beam tip, in this embodiment, still include a plurality of buried bolts 11 in advance, buried bolts 11 are fixed in on the lower flange plate of girder i-shaped steel skeleton 4, be equipped with a plurality of third high-strength bolt holes 15 on the lower flange plate of the overhanging i-shaped steel skeleton 13 of secondary beam tip, buried bolts 11 pass the lower surface of cubic breach 8 in advance, buried bolts 11 partly is in girder concrete body 3 promptly, another part is in cubic breach 8 department. The embedded bolt 11 is fixedly connected with the third high-strength bolt hole 15, and the lower flange plate of the I-shaped steel framework 13 extending outwards from the end part of the secondary beam can be fixed on the lower surface of the block-shaped gap 8 through the embedded bolt 11. Those skilled in the art can set the actual number and positions of the embedded bolts 11 according to actual needs.
For the prefabricated secondary beam 2, in this embodiment, the prefabricated secondary beam 2 includes a secondary beam concrete body 5 and a secondary beam i-shaped steel skeleton 6, the secondary beam i-shaped steel skeleton 6 is fixed in the secondary beam concrete body 5, one end of the secondary beam i-shaped steel skeleton 6 is fixedly connected with one end of an overhanging i-shaped steel skeleton 13 at the end of the secondary beam, and the secondary beam i-shaped steel skeleton 6 and the overhanging i-shaped steel skeleton 13 at the end of the secondary beam are of an integrated structure.
The whole manufacturing process is as follows:
the method comprises the steps of manufacturing a prefabricated girder 1, welding an external ribbed plate 10 at a girder I-shaped steel framework 4 when a section steel concrete component is manufactured in a prefabricating factory, installing an embedded bolt 11 at the bottom of a lower flange plate of the girder I-shaped steel framework 4, then erecting a formwork and pouring, installing a U-shaped formwork at a block gap 8 to reserve a girder strip gap 9 during formwork erecting, wherein a section steel web plate can be directly used as a formwork in the block gap 8. Similarly, the prefabricated secondary beam 2 is manufactured, the specification and the size of the I-shaped steel framework 13 extending outwards from the end part of the secondary beam are determined, and then formwork erection and pouring are carried out on the periphery of the I-shaped steel framework 6 of the secondary beam.
In order to realize accurate positioning after pouring, a first high-strength bolt hole 12 is punched in an upper flange plate and an external rib plate 10 of a girder I-shaped steel framework 4, a second high-strength bolt hole 14 is punched in a web plate and an upper flange plate of a secondary girder end part overhanging I-shaped steel framework 13, a plurality of third high-strength bolt holes 15 are punched in a lower flange plate of the secondary girder end part overhanging I-shaped steel framework 13, and the third high-strength bolt holes 15 at the lower flange plate of the secondary girder end part overhanging I-shaped steel framework 13 correspond to embedded bolts 11 one by one; and then, extending an overhanging I-shaped steel skeleton 13 at the end part of the secondary beam 2 into the block-shaped gap 8 of the prefabricated main beam 1, aligning a third high-strength bolt hole 15 with an embedded bolt 11, and then corresponding a first high-strength bolt hole 12 of an upper flange plate of the prefabricated main beam 1 to a second high-strength bolt hole 14 of the upper flange plate of the overhanging I-shaped steel skeleton 13 at the end part of the secondary beam one by one, wherein the first high-strength bolt hole 12 on the external rib plate 10 corresponds to the second high-strength bolt hole 14 on a web plate of the overhanging I-shaped steel skeleton 13 at the end part of the secondary beam one by one.
When the prefabricated main beam 1 and the prefabricated secondary beam 2 are connected on site, firstly, the I-shaped steel framework 13 extending outwards from the end part of the secondary beam extends into the block-shaped gap 8 of the prefabricated main beam 1, the web plate of the I-shaped steel framework 13 extending outwards from the end part of the secondary beam extends into the main beam strip-shaped gap 9 between the two external rib plates 10, and the two external rib plates 10 of the prefabricated main beam 1 extend into the secondary beam strip-shaped gap 16 of the I-shaped steel framework 13 extending outwards from the end part of the secondary beam. After accurate alignment, the prefabricated secondary beam 2 moves downwards, the embedded bolt 11 of the prefabricated main beam 1 penetrates through the third high-strength bolt hole 15 in the lower flange plate of the I-shaped steel framework 13 extending outwards from the end part of the secondary beam, and the lower flange plate, the upper flange plate and the web plate of the I-shaped steel framework 13 extending outwards from the end part of the secondary beam are respectively connected with the embedded bolt 11, the upper flange plate and the external ribbed plate 10 of the prefabricated main beam 1 through the high-strength bolt 7, so that the prefabricated main beam 1 and the prefabricated secondary beam 2 are fixed with each other.
The principle and the implementation mode of the present invention are explained by applying specific examples in the present specification, and the above descriptions of the examples are only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (6)
1. The utility model provides a prefabricated assembled shaped steel concrete primary and secondary roof beam connected node which characterized in that: the prefabricated secondary beam comprises a prefabricated main beam and a prefabricated secondary beam, wherein a block-shaped notch is formed in the side face of the prefabricated main beam, two L-shaped structures which are symmetrically fixed are arranged at the block-shaped notch and comprise a horizontal portion and a vertical portion, a main beam strip-shaped gap is formed between the vertical portion, an I-shaped steel framework extending out of the end portion of the secondary beam is arranged at one end of the prefabricated secondary beam, two secondary beam strip-shaped gaps which are parallel to each other are formed between the two sides of the lower end of a web plate of the I-shaped steel framework extending out of the end portion of the secondary beam and a lower flange plate, the web plate of the I-shaped steel framework extending out of the end portion of the secondary beam is fixed in the main beam strip-shaped gap, the two vertical portions are respectively inserted into the two secondary beam strip-shaped gaps, and an upper flange.
2. The prefabricated assembly type steel reinforced concrete primary and secondary beam connection node of claim 1, which is characterized in that: the prefabricated main beam comprises a main beam concrete body and a main beam I-shaped steel framework, wherein the main beam I-shaped steel framework is fixed in the main beam concrete body and is positioned at the position of the block-shaped gap, and the main beam strip-shaped gap is formed in the main beam I-shaped steel framework.
3. The prefabricated assembly type steel reinforced concrete primary and secondary beam connection node of claim 2, characterized in that: the vertical part is an external ribbed plate, the external ribbed plate is fixed between an upper flange plate and a lower flange plate of the girder I-shaped steel framework, the upper ends of the two external ribbed plates are fixed on the upper flange plate of the girder I-shaped steel framework on two sides of the girder bar-shaped gap, and the lower end of the external ribbed plate is fixed on the lower flange plate of the girder I-shaped steel framework.
4. The prefabricated assembly type steel reinforced concrete primary and secondary beam connection node of claim 3, characterized in that: the I-shaped steel skeleton of the main beam and the rib plate at the position of the blocky gap are provided with a plurality of first high-strength bolt holes, the upper flange plate and the web plate of the I-shaped steel skeleton extending outwards from the end part of the secondary beam are provided with a plurality of second high-strength bolt holes, the positions of the plurality of first high-strength bolt holes and the plurality of second high-strength bolt holes are opposite, and the first high-strength bolt holes and the second high-strength bolt holes are fixed through high-strength bolts.
5. The prefabricated assembly type steel reinforced concrete primary and secondary beam connection node of claim 2, characterized in that: the auxiliary beam structure is characterized by further comprising a plurality of embedded bolts, the embedded bolts are fixed on a lower flange plate of the main beam I-shaped steel framework, a plurality of third high-strength bolt holes are formed in the lower flange plate of the secondary beam end portion extending out of the I-shaped steel framework, the embedded bolts penetrate through the lower surface of the block-shaped gap, and the embedded bolts are inserted into the third high-strength bolt holes.
6. The prefabricated assembly type steel reinforced concrete primary and secondary beam connection node of claim 1, which is characterized in that: the prefabricated secondary beam comprises a secondary beam concrete body and a secondary beam I-shaped steel skeleton, wherein the secondary beam I-shaped steel skeleton is fixed in the secondary beam concrete body, and one end of the secondary beam I-shaped steel skeleton is fixedly connected with one end of the secondary beam end portion extending outwards to form the I-shaped steel skeleton.
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Cited By (4)
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| CN112282049A (en) * | 2020-11-17 | 2021-01-29 | 广州地铁设计研究院股份有限公司 | Reinforced concrete superposed primary and secondary beam connecting joint and construction method thereof |
| CN113684926A (en) * | 2021-09-08 | 2021-11-23 | 南通职业大学 | Construction process of dry-type fully-assembled industrialized concrete primary and secondary beam joints |
| CN113833120A (en) * | 2021-08-30 | 2021-12-24 | 三东筑工（德州）有限公司 | Connection structure of assembled precast concrete shear wall and girder steel |
| CN114263272A (en) * | 2021-12-23 | 2022-04-01 | 泰州职业技术学院 | Prefabricated assembly type main beam and secondary beam connecting device based on BIM and installation method |
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