CN111962731B - Grid beam and bidirectional stressed steel bar truss floor structure and construction method thereof - Google Patents
Grid beam and bidirectional stressed steel bar truss floor structure and construction method thereof Download PDFInfo
- Publication number
- CN111962731B CN111962731B CN202010320465.0A CN202010320465A CN111962731B CN 111962731 B CN111962731 B CN 111962731B CN 202010320465 A CN202010320465 A CN 202010320465A CN 111962731 B CN111962731 B CN 111962731B
- Authority
- CN
- China
- Prior art keywords
- steel bar
- steel
- shaped
- grid
- bar truss
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
- E04B5/16—Load-carrying floor structures wholly or partly cast or similarly formed in situ
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Rod-Shaped Construction Members (AREA)
Abstract
The invention belongs to the technical field of civil engineering fabricated steel structures, and discloses a grid beam and bidirectional stressed steel bar truss floor structure, wherein four corners of the periphery of each floor unit are columns, four sides of each floor unit are main beams, connecting nodes of the main beams and the columns are in rigid connection, and the inner side of the periphery of each floor unit is provided with grid-shaped secondary beams which are hinged with the main beams; the connection nodes between the latticed secondary beams are rigid nodes, a plurality of grid units are formed between the latticed secondary beams, and each grid unit is provided with a bidirectional stressed steel bar truss for pouring concrete; and based on the steel bar truss with bidirectional stress, each floor slab unit is poured into a concrete floor slab. The invention simplifies the construction method, improves the construction speed, reduces the binding operation time of the steel bar truss on the construction site, further reduces the workload of the construction site, achieves the purposes of energy conservation and environmental protection, and accelerates the development of intellectualization.
Description
Technical Field
The invention belongs to the technical field of civil engineering fabricated steel structures, and relates to a grid beam and bidirectional stressed steel bar truss floor structure and a construction method.
Background
In the 5.2.18 th specification in the assembled steel structure building technical standard (implemented in 2017, 06, 01), the assembled steel structure floor slab should meet the following specifications:
the floor can be selected from several floors with high industrialization degree: profiled steel sheet composite floor, steel bar truss floor composite floor, precast concrete composite floor and prestressed hollow floor. In the prior art, the steel bar truss floor slab structure stressed unidirectionally is the most commonly used, and the structure has the advantages of large floor slab thickness, uneven stress of a main beam, large steel consumption, low factory degree, large workload of a construction site, and remarkable increase of construction cost.
Disclosure of Invention
Objects of the invention
The purpose of the invention is: the grid beam and bidirectional stressed steel bar truss floor structure and the construction method can simplify the manufacturing and installation method, reduce the construction and installation engineering quantity of work numbers, ensure the construction and installation quality, reduce the construction cost and accelerate the engineering progress when the construction area is small and the construction site does not have the precast concrete slab condition or when the standard live load of the floor is large (8-15 KN/square meter).
(II) technical scheme
In order to solve the technical problem, the invention provides a steel bar truss floor structure with grid beams and bidirectional stress, wherein four corners of the periphery of each floor unit are provided with columns, four sides of each floor unit are provided with main beams, connecting nodes of the main beams and the columns are rigidly connected, the inner side of the periphery of each floor unit is provided with grid-shaped secondary beams, and the grid-shaped secondary beams are hinged with the main beams; the connection nodes between the latticed secondary beams are rigid nodes, a plurality of grid units are formed between the latticed secondary beams, and each grid unit is provided with a bidirectional stressed steel bar truss for pouring concrete; and based on the steel bar truss with bidirectional stress, each floor slab unit is poured into a concrete floor slab.
The latticed secondary beam is a cross beam which is of an integral structure and is made of hot-rolled I-shaped steel.
The cross beam is changed into a small cross beam before transportation; when the # -shaped beam is changed into a small # -shaped beam, the beam is vertically cut, cutting lines on an upper flange plate and a lower flange plate of the secondary beam are vertical to the length direction of the cut secondary beam, and the cutting lines are close to the central line of a main shaft beam of the formed small # -shaped beam; when the cut small # -shaped beam is transported to a temporary construction facility, the cut I-shaped steel is aligned at the cutting line, the connecting steel plate is arranged at the back of the cutting line, the connecting steel plate is connected with two sections of I-shaped steel webs by bolts, and the upper flange plate and the lower flange plate at the cutting line are welded to form the complete # -shaped beam.
And rigid nodes among the grid-shaped secondary beams are cross-shaped nodes or square-shaped nodes.
When the cross-shaped joint is formed, triangular plates are additionally welded at four corners of an upper flange plate and a lower flange plate of the I-shaped steel at the joint of the secondary beam, and cross-shaped steel plates are welded between the upper flange plate and the lower flange plate of the I-shaped steel at the joint of the secondary beam and rib plates; the height of the triangular plate is 50% of the width of the flange plate of the I-shaped steel, and the thickness of the cross-shaped steel plate is more than or equal to that of the web plate of the I-shaped steel.
When the square-shaped joint is formed, triangular plates are additionally welded at four corners of an upper flange plate and a lower flange plate of the I-shaped steel at the joint of the secondary beam, and square-shaped steel plates are welded between the upper flange plate and the lower flange plate of the I-shaped steel at the joint of the secondary beam and rib plates; the height of the triangular plate is 50% of the width of the flange plate of the I-shaped steel, and the thickness of the square steel plate is more than or equal to that of the web plate of the I-shaped steel.
The steel bar truss is characterized in that an upper chord steel bar and a lower chord steel bar are respectively welded to form a net structure of parallel secondary beams, a continuous triangular frame perpendicular to the secondary beams is arranged between the upper chord steel bar and the lower chord steel bar, and a hot galvanized steel plate is welded at the bottom of the steel bar truss.
The distance between the upper chord steel bars is 2 times of the distance between the lower chord steel bars; and reinforcing steel bars are respectively additionally arranged on the peripheries of the top surface and the bottom surface of the steel bar truss on each grid unit to form a steel bar square frame, lifting hooks are arranged on the steel bar square frame, and the steel bar square frame on the bottom surface is welded with the flange plates on the I-shaped steel of the grid unit secondary beam.
The invention also provides a construction method of the grid beam and bidirectional stressed steel bar truss floor structure, which comprises the following steps:
step S1: before hoisting the complete latticed secondary beam in the shape of the Chinese character jing, sequentially hoisting the steel bar trusses of each grid unit, placing the steel bar trusses on the upper flange plates of the grid beams, welding the steel bar trusses in place according to the drawing requirements after hoisting, and brushing sealant;
step S2: pouring concrete: and pouring concrete to form the concrete floor slab based on the main beam, the latticed secondary beam and the steel bar truss floor slab stressed bidirectionally.
The above step S1 includes the following two substeps:
step S11: before hoisting the complete latticed secondary beam in the shape of the Chinese character jing, placing the steel bar truss with the middle part subjected to bidirectional stress except the four corners on the upper flange plate of the latticed beam, hoisting the steel bar truss in place, welding the steel bar truss according to the requirements of a drawing, and brushing sealant;
step S12: hoisting the steel bar trusses at the four corners, placing the steel bar trusses on the upper flange plate of the grid beam, hoisting the steel bar trusses in place, welding the steel bar trusses according to the drawing requirements, and brushing sealant.
(III) advantageous effects
The grid beam and bidirectional stressed steel bar truss floor structure and the construction method provided by the technical scheme are easy to operate, can be completely completed in temporary facilities of processing plants and construction sites, simplify the construction method, improve the construction speed, further achieve the purposes of energy conservation and environmental protection, and accelerate the development of intellectualization.
Drawings
FIG. 1 is a schematic layout view of a grid beam shaped like a Chinese character 'jing' in an embodiment of the present invention.
FIG. 2 is a schematic layout view of a small grid beam shaped like a Chinese character jing in an embodiment of the present invention.
FIG. 3 is a schematic plane view and a schematic cross-sectional view of a connection node of a small cross beam according to an embodiment of the present invention. Wherein, a is a plane view of the connection node of the small cross beam, and b is a sectional view.
FIG. 4 is a schematic cross-shaped node plane and cross-sectional view according to an embodiment of the invention. Wherein, a is a cross-shaped node plane schematic diagram, and b is a cross-sectional diagram.
FIG. 5 is a schematic plane view and a schematic cross-sectional view of a square-shaped node according to an embodiment of the present invention. Wherein, the a picture is a schematic plane view of the square-shaped node, and the b picture is a sectional view.
Fig. 6 is a schematic floor plan view of a steel bar truss in the embodiment of the invention.
Fig. 7 is a schematic cross-sectional view of fig. 6.
Fig. 8 is a schematic view illustrating installation and welding of a lower frame of a steel bar truss according to an embodiment of the invention.
Fig. 9 is a schematic view of a steel bar truss hanging point and an a-direction view thereof in the embodiment of the invention. Wherein, a is a schematic diagram of a steel bar truss hanging point, and b is a view along the direction A-A.
Fig. 10 is a schematic plane load distribution diagram of the grid beam in the embodiment of the invention.
Fig. 11 is a schematic view of load distribution of a simply supported floor with unidirectional beams.
Fig. 12 is a calculation diagram of the section moment of inertia I of the steel bar truss under the construction load.
Detailed Description
In order to make the objects, contents and advantages of the present invention clearer, the following detailed description of the embodiments of the present invention will be made in conjunction with the accompanying drawings and examples.
At present, the technical standard for the construction of fabricated steel structures (GB/T51232-2016) recommends that a steel bar truss floor structure stressed unidirectionally is placed on a steel beam stressed unidirectionally most frequently, the steel bar truss can be hoisted only after the steel beam is hoisted in place, 40% of steel bar binding workload of the floor needs to be completed on a floor of a job number, and the workload is increased greatly.
The steel bar truss floor structure with the grid beam and the bidirectional stress provided by the invention is mainly used for (6 m-15 m) x (6 m-15 m) large column net public buildings: office buildings, hospitals, schools, supermarkets and the like, and can be used for multi-storey storehouses, museums, exhibition halls, factory buildings and storehouses of multi-storey industrial buildings (the living load standard value is less than or equal to 15 KN/square meter), such as multi-storey industrial factory buildings and storehouses in the industries of electronics, communication, light industry, optical instruments, instruments and civil electrical appliances.
As shown in fig. 1 and 2, in the steel bar truss floor structure with bidirectional stress applied by grid beams, four corners of the periphery of each floor unit are provided with columns, four sides are provided with main beams, the connection nodes of the main beams and the columns are in rigid connection, the inner side of the periphery of each floor unit is provided with grid-shaped secondary beams, and the grid-shaped secondary beams are hinged with the main beams; the connection nodes between the latticed secondary beams are rigid nodes, a plurality of grid units are formed between the latticed secondary beams, and each grid unit is provided with a bidirectional stressed steel bar truss for pouring concrete; and based on the steel bar truss with bidirectional stress, each floor slab unit is poured into a concrete floor slab.
The latticed secondary beam is a cross beam which is of an integrated structure and is made of hot-rolled I-shaped steel. In this embodiment, a 9.9m × 9.9m large column net is taken as an example, and in implementation, 9 3.3m × 3.3m grid units are formed between the grid-shaped secondary beams; in order to facilitate transportation and assembly, the # -shaped beam is changed into a small # -shaped beam, and the small # -shaped beam is transported into a temporary facility on a construction site to be connected into a complete # -shaped beam. When the # -shaped beam is changed into a small # -shaped beam, the cutting is performed vertically, the cutting lines on the upper flange plate and the lower flange plate of the secondary beam are perpendicular to the length direction of the cut secondary beam, and the cutting lines are close to the joint position of the main shaft beam of the formed small # -shaped beam, as shown in fig. 2 and 3. The width of the cut small # -shaped beam is reduced, the beam is easier to transport, when the beam is transported to a temporary construction facility, the cut I-shaped steel is aligned at the cutting line, the connecting steel plate is arranged at the back of the cutting line, the connecting steel plate is connected with two sections of I-shaped steel webs by bolts, and the upper flange plate and the lower flange plate at the cutting line are welded to form the complete # -shaped beam. In this embodiment, the center line of the main shaft beam of the small cross-shaped beam formed by the cutting line distance in the 9.9m × 9.9m large column network is 250 mm.
The connection nodes between the latticed secondary beams are bidirectionally-bent nodes, the core area of the flange plate under the I-shaped steel is bidirectionally-pulled, and the nodes are required to be made into rigid nodes. In this embodiment, the rigid nodes between the grid-shaped secondary beams are cross-shaped nodes or square-shaped nodes.
As shown in fig. 4, when the cross-shaped joint is formed, triangular plates are additionally welded at four corners of the upper flange plate and the lower flange plate of the i-shaped steel at the joint of the secondary beam, and cross-shaped steel plates are welded between the upper flange plate and the lower flange plate of the i-shaped steel at the joint of the secondary beam and at the rib plate; the height of the triangular plate is 50% of the width of the flange plate of the I-shaped steel, and the thickness of the cross-shaped steel plate is more than or equal to that of the web plate of the I-shaped steel.
As shown in fig. 5, when the square-shaped joint is formed, triangular plates are additionally welded at four corners of the upper flange plate and the lower flange plate of the i-shaped steel at the joint of the secondary beam, and square-shaped steel plates are welded between the upper flange plate and the lower flange plate of the i-shaped steel at the joint of the secondary beam and at the rib plate; the height of the triangular plate is 50% of the width of the flange plate of the I-shaped steel, and the thickness of the square steel plate is more than or equal to that of the web plate of the I-shaped steel.
In this embodiment, as shown in fig. 6, 7, 8, and 9, the steel bar truss stressed in two directions is used as a reinforcing bar of a floor slab structure, and in order to meet the construction requirement, the rigidity of the steel bar truss must be increased, so that the triangular frame for fixing the upper and lower chord steel bars needs to be made into a continuous structure, and the square frame and the device capable of automatically unhooking are additionally arranged around the steel bar truss to meet the hoisting requirement. The formation of the structure can be completed in a processing plant, and the industrial degree is high. Specifically, the upper chord steel bar and the lower chord steel bar of the steel bar truss stressed in two directions are welded to form a net structure vertical to the secondary beam; in order to increase the rigidity of the steel bar truss, a continuous triangular frame is arranged between the upper chord steel bar and the lower chord steel bar; in order to pour concrete, a hot galvanized steel plate is welded at the bottom of the steel bar truss, and the galvanized steel plate with the thickness of 0.5mm is selected in the embodiment. In order to be matched with the triangular frame structure, the distance between the upper chord steel bars is 2 times of the distance between the lower chord steel bars; in order to facilitate hoisting, reinforcing steel bars are respectively added and placed around the top surface and the bottom surface of the steel bar truss on each grid unit to form a steel bar square frame, lifting hooks are arranged on the steel bar square frame, and the steel bar square frame on the bottom surface is welded with the flange plates on the I-shaped steel of the secondary beams of the grid units.
In the steel bar truss of the embodiment, the upper chord steel bar and the lower chord steel bar are both
The top reinforcing steel bar frame uses reinforcing steel bars of
The bottom reinforcing steel bar frame uses reinforcing steel bars of
Compared with the prior art which adopts all
The unidirectional stress steel bar truss structure saves the cost.
The steel bar truss of the embodiment not only can be used as a template for pouring concrete, but also can bear the whole load in use.
As shown in fig. 12, under the action of the construction load, the calculation formula of the section moment of inertia I of the steel bar truss is as follows:
A1-the cross-sectional area of the upper chord steel bar of each linear meter of the steel bar truss;
A2-the cross-sectional area of the lower chord steel bar of the steel bar truss per linear meter;
h0and the center distance between the upper chord steel bar and the lower chord steel bar of the steel bar truss.
The cross node of the bidirectional stress grid beam bears bidirectional bending moment; the lower flange plate of the grid beam bears bidirectional tensile stress, the stress is complex, and after the node is reinforced, the bearing capacity of the grid beam is increased by 60%. The reinforced concrete floor slab at the crossed node can not increase the rigidity of the I-shaped steel beam, the reinforced concrete floor slab on the middle steel beam of the two nodes can increase the rigidity of the I-shaped steel beam, for example, the length Lx and the width Ly of a grid unit are respectively Lx-Ly-3.3 m, and the thickness of the concrete floor slab is 110mm, the rotational inertia I and the section coefficient W are increased by about 60%, the reinforced concrete at the node can not increase the rigidity of the I-shaped steel beam, I is increased by about 150%, and the bearing capacity W of the I-shaped steel beam is increased by about 40%, as shown in FIG. 9.
The steel bar truss floor structure recommended by the technical Standard for the construction of fabricated Steel structures (GB/T51232-2016) is a unidirectional stressed beam, and the reinforced concrete floors on the beam are continuous floors. The reinforced concrete on the upper part of the steel beam is in the tension area, and the secondary beam can not increase the rigidity of the I-shaped steel beam. In order to increase the rigidity of the i-beam in the reinforced concrete floor, a simply supported floor must be made, as shown in fig. 11. The unidirectional stressed steel bar truss is placed on the unidirectional stressed secondary beam flange plate, the diameter of the steel bar is large, the thickness of the concrete plate is thick, the manufacturing cost is high, about 40% of steel bars are bound on a construction site, and the industrial degree is low.
In "assembly steel structure building technical standard (GB/T51232-2016)" implemented in 2017, 06/01, the steel bar truss floor slab composite floor slab in item 5.2.18, the steel beam is a one-way stressed beam, in order to increase the rigidity of the steel beam by the concrete, a multi-span hinged floor slab must be made, and the positive bending moment M is 0.125ql2The reinforced concrete floor slab on the grid beam is a slab supported by four-side hinges, and when Lx is Ly, the sum of bidirectional positive bending moment M is 0.0736ql2The total bending moment of the floor slab on the grid beam is only 59 percent of that of the floor slab on the unidirectional stress beam. Therefore, the floor structure with the grid beams stressed in two directions saves steel, cost, manpower, material resources and financial resources compared with the floor structure stressed in one direction。
Grid roof beam adds composite sheet floor slab structural system, grid roof beam adds the reinforcing bar truss floor slab structural system of two-way atress and the reinforcing bar truss floor slab structural system of one-way atress compares (standard dead load 1.75KN/, the square meter (do not contain the floor dead weight), standard live load 3.0KN/, the square meter), see the following table:
grid roof beam adds composite sheet floor slab structural system, grid roof beam adds the reinforcing bar truss floor slab structural system of two-way atress and the roof beam of one-way atress adds reinforcing bar truss floor slab structural system and compares (standard dead load 1.75KN/, the square meter (do not contain the floor dead weight), standard live load 8.0KN/, the square meter), see the following table:
the invention also provides a construction method based on the floor slab structure, which comprises the following steps:
step S1: before hoisting the complete latticed secondary beam in the shape of the Chinese character jing, sequentially hoisting the steel bar trusses of each grid unit, placing the steel bar trusses on the upper flange plates of the grid beams, welding the steel bar trusses in place according to the drawing requirements after hoisting, and brushing sealant;
step S2: pouring concrete: and pouring concrete to form the concrete floor slab based on the main beam, the latticed secondary beam and the steel bar truss floor slab stressed bidirectionally.
In the step S1, when the special hoisting equipment is provided at the construction site, the steel bar trusses at the four corners and other positions of the grid-shaped secondary beam are hoisted and installed at the same time. If no special hoisting equipment is available, the step S1 is divided into the following two substeps:
step S11: before hoisting the complete latticed secondary beam in the shape of the Chinese character jing, placing the steel bar truss with the middle part subjected to bidirectional stress except the four corners on the upper flange plate of the latticed beam, hoisting the steel bar truss in place, welding the steel bar truss according to the requirements of a drawing, and brushing sealant;
step S12: hoisting the steel bar trusses at the four corners, placing the steel bar trusses on the upper flange plate of the grid beam, hoisting the steel bar trusses in place, welding the steel bar trusses according to the drawing requirements, and brushing sealant.
In step S1, the number of the steel bar trusses on the grid-shaped secondary beams of each floor slab unit is changed along with the number of the grid-shaped secondary beams, before the grid-shaped secondary beams are hoisted in place, the steel bar trusses of the grids at the middle parts of the grid-shaped secondary beams are hoisted in place and fixed, then the steel bar trusses of the grids at the four corners of the grid-shaped secondary beams are hoisted in place and fixed, and then the periphery of the steel bar trusses is brushed with sealant.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (6)
1. A steel bar truss floor structure with grid beams and bidirectional stress is characterized in that four corners of the periphery of each floor unit in the floor structure are columns, four sides of each floor unit are main beams, connecting nodes of the main beams and the columns are in rigid connection, grid-shaped secondary beams are arranged on the inner sides of the periphery of each floor unit, and the grid-shaped secondary beams are hinged with the main beams; the connection nodes between the latticed secondary beams are rigid nodes, a plurality of grid units are formed between the latticed secondary beams, and each grid unit is provided with a bidirectional stressed steel bar truss for pouring concrete; based on the steel bar truss with bidirectional stress, each floor slab unit is poured into a concrete floor slab;
the latticed secondary beam is a cross beam which is of an integral structure and is made of hot-rolled I-shaped steel;
the # -shaped beam is changed into a small # -shaped beam before transportation; when the # -shaped beam is changed into a small # -shaped beam, the beam is vertically cut, cutting lines on an upper flange plate and a lower flange plate of the secondary beam are vertical to the length direction of the cut secondary beam, and the cutting lines are close to the central line of a main shaft beam of the formed small # -shaped beam; when the cut small # -shaped beam is transported to a temporary construction facility, aligning the cut I-shaped steel at a cutting line, arranging a connecting steel plate at the back of the cutting line, connecting the connecting steel plate with two sections of I-shaped steel webs by bolts, welding upper and lower flange plates at the cutting line to form a complete # -shaped beam;
in the steel bar truss, an upper chord steel bar and a lower chord steel bar are respectively welded to form a net structure of parallel secondary beams, a continuous triangular frame perpendicular to the secondary beams is arranged between the upper chord steel bar and the lower chord steel bar, and a hot galvanized steel plate is welded at the bottom of the steel bar truss;
the distance between the upper chord steel bars is 2 times of the distance between the lower chord steel bars; and reinforcing steel bars are respectively additionally arranged on the peripheries of the top surface and the bottom surface of the steel bar truss on each grid unit to form a steel bar square frame, lifting hooks are arranged on the steel bar square frame, and the steel bar square frame on the bottom surface is welded with the flange plates on the I-shaped steel of the grid unit secondary beam.
2. A latticed girder and bi-directionally stressed steel truss floor structure as claimed in claim 1, wherein rigid nodes between said latticed sub-girders are cross-shaped nodes or square-shaped nodes.
3. The floor slab structure of a grid beam and a bidirectional-stressed steel bar truss as claimed in claim 2, wherein when the cross-shaped joints are formed, triangular plates are welded at four corners of upper and lower flange plates of the i-shaped steel at the joints of the secondary beams, and cross-shaped steel plates are welded between the upper and lower flange plates of the i-shaped steel at the joints of the secondary beams and at the rib plates; the height of the triangular plate is 50% of the width of the flange plate of the I-shaped steel, and the thickness of the cross-shaped steel plate is more than or equal to that of the web plate of the I-shaped steel.
4. The floor slab structure of a grid beam and a bidirectional stressed steel bar truss as claimed in claim 2, wherein when the square nodes are formed, triangular plates are welded at four corners of upper and lower flange plates of the i-shaped steel at the connection nodes of the secondary beams, and square steel plates are welded between the upper and lower flange plates of the i-shaped steel at the connection nodes of the secondary beams and at the rib plates; the height of the triangular plate is 50% of the width of the flange plate of the I-shaped steel, and the thickness of the square steel plate is more than or equal to that of the web plate of the I-shaped steel.
5. A construction method of a steel bar truss floor structure based on any one of the grid beams and bidirectional stress of claims 2-4 is characterized by comprising the following steps:
step S1: before hoisting the complete latticed secondary beam in the shape of the Chinese character jing, sequentially hoisting the steel bar trusses of each grid unit, placing the steel bar trusses on the upper flange plates of the grid beams, welding the steel bar trusses in place according to the drawing requirements after hoisting, and brushing sealant;
step S2: pouring concrete: and pouring concrete to form the concrete floor slab based on the main beam, the latticed secondary beam and the steel bar truss floor slab stressed bidirectionally.
6. The construction method according to claim 5, wherein the step S1 includes the following two substeps:
step S11: before hoisting the complete latticed secondary beam in the shape of the Chinese character jing, placing the steel bar truss with the middle part subjected to bidirectional stress except the four corners on the upper flange plate of the latticed beam, hoisting the steel bar truss in place, welding the steel bar truss according to the requirements of a drawing, and brushing sealant;
step S12: hoisting the steel bar trusses at the four corners, placing the steel bar trusses on the upper flange plate of the grid beam, hoisting the steel bar trusses in place, welding the steel bar trusses according to the drawing requirements, and brushing sealant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010320465.0A CN111962731B (en) | 2020-04-22 | 2020-04-22 | Grid beam and bidirectional stressed steel bar truss floor structure and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010320465.0A CN111962731B (en) | 2020-04-22 | 2020-04-22 | Grid beam and bidirectional stressed steel bar truss floor structure and construction method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111962731A CN111962731A (en) | 2020-11-20 |
| CN111962731B true CN111962731B (en) | 2021-06-18 |
Family
ID=73358323
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010320465.0A Active CN111962731B (en) | 2020-04-22 | 2020-04-22 | Grid beam and bidirectional stressed steel bar truss floor structure and construction method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111962731B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114193635B (en) * | 2021-12-23 | 2024-03-12 | 国泰新点软件股份有限公司 | Method and device for cutting middle beam of constructional engineering |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20100024768A (en) * | 2008-08-26 | 2010-03-08 | (주)코스틸 | Deck plate and arranging structure thereof |
| CN103741857A (en) * | 2014-01-26 | 2014-04-23 | 江苏中宝钢构有限公司 | Floor system with U-shaped steel beams, steel bar trusses and floor bearing plates |
| CN108385886A (en) * | 2018-03-22 | 2018-08-10 | 李世骏 | Grid beams floor construction and construction method |
| CN109339319A (en) * | 2018-10-17 | 2019-02-15 | 西安理工大学 | Steel plate concrete composite coupling beams with two-way concrete slab truss floor support plate |
| CN109881834A (en) * | 2019-03-18 | 2019-06-14 | 李世骏 | Grid beams add the floor construction and construction method of composite plate |
| CN209397804U (en) * | 2018-12-25 | 2019-09-17 | 罗强军 | A kind of assembled steel frame-composite slim floor |
-
2020
- 2020-04-22 CN CN202010320465.0A patent/CN111962731B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20100024768A (en) * | 2008-08-26 | 2010-03-08 | (주)코스틸 | Deck plate and arranging structure thereof |
| CN103741857A (en) * | 2014-01-26 | 2014-04-23 | 江苏中宝钢构有限公司 | Floor system with U-shaped steel beams, steel bar trusses and floor bearing plates |
| CN108385886A (en) * | 2018-03-22 | 2018-08-10 | 李世骏 | Grid beams floor construction and construction method |
| CN109339319A (en) * | 2018-10-17 | 2019-02-15 | 西安理工大学 | Steel plate concrete composite coupling beams with two-way concrete slab truss floor support plate |
| CN209397804U (en) * | 2018-12-25 | 2019-09-17 | 罗强军 | A kind of assembled steel frame-composite slim floor |
| CN109881834A (en) * | 2019-03-18 | 2019-06-14 | 李世骏 | Grid beams add the floor construction and construction method of composite plate |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111962731A (en) | 2020-11-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107090925B (en) | Reinforced precast reinforced concrete shear wall, structural system and construction method thereof | |
| CN2818421Y (en) | Upper bearing frame for laminated floorslab construction | |
| CN111206680B (en) | Combined floor system frame structure building system | |
| EA019161B1 (en) | Precast concrete building units | |
| CN109024896B (en) | Double-deck crashproof assembled steel construction truss reinforcing bar processing prevents pounding canopy | |
| CN111962731B (en) | Grid beam and bidirectional stressed steel bar truss floor structure and construction method thereof | |
| CN112854438A (en) | Assembly type concrete frame system with exposed flat net rack floor and exposed truss girder | |
| CN216920899U (en) | Profiled steel sheet floor structure with grid beam and bidirectional stress | |
| CN116084567B (en) | Prestress box plate assembly type steel structure building and prestress tensioning technology thereof | |
| CN219622069U (en) | Assembled light steel strip hollow steel bar truss concrete strip superposed two-way floor slab | |
| CN207905104U (en) | A kind of assembled architecture truss structure | |
| CN207062787U (en) | Can Fast Installation remove maintenance construction platform | |
| CN112900949B (en) | Assembled reinforced concrete unidirectional multi-ribbed laminated slab floor and construction method thereof | |
| CN106906756B (en) | Can Fast Installation remove maintenance operation platform and its construction method | |
| CN201433510Y (en) | Steel roof cover system | |
| CN109881834B (en) | Floor slab structure with grid beams and composite plates and construction method | |
| KR20030066165A (en) | Improved T-shape PC Slabs Based on Long-Line Method which Include the Service Ducts and Method for Constructing Structure Using the Same | |
| CN1044829C (en) | Overhead site-casting method for broad-span presrtressed arch plate | |
| CN201486038U (en) | Steel roof system | |
| CN115822176B (en) | Support-free demoulding construction bidirectional plate reinforced net rack and bidirectional plate construction method | |
| CN109356282A (en) | A kind of M shape Staggered Truss Frame System and construction method | |
| CN220301630U (en) | Upper trans-form variable cross-section steel beam and roof system thereof | |
| CN220666463U (en) | Novel building frame structure for civil construction engineering | |
| CN215859240U (en) | Be used for reinforced (rfd) spandrel girder in house | |
| CN215926438U (en) | Prestressed composite floor slab |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |