WO2018163134A1

WO2018163134A1 - Hexagonal flanged prefabricated connection

Info

Publication number: WO2018163134A1
Application number: PCT/IB2018/053161
Authority: WO
Inventors: Mohammad Taghi CHAICHI NOSRATI
Original assignee: Individual
Current assignee: Individual
Priority date: 2017-03-07
Filing date: 2018-05-07
Publication date: 2018-09-13
Anticipated expiration: 2019-09-07
Also published as: WO2018163134A4

Abstract

In conventional steel structures with bolted connections, due to the construction of the column for the multi-story all in one, it is difficult to construct, carry and install. In order to solve these problems hexagonal flanged prefabricated connection is proposed. This connection is made as a single element in the factory, and the beams and columns are flanged to fit the length of the span and the height of the floor in place. The main application of this structural system is the following: In densely populated areas, harsh areas, critical areas, exhibition structures, hospitals and relief and temporary shelters, quick and emergency construction of sites, the construction of damaged houses and construction in areas where there is no specialist staff for installation.

Description

Invention title:

Hexagonal flanged prefabricated connection Invention field:

Building section E04C

Technical Problem and Invention Objectives:

Today, the rapid and massive construction of housing and shelter is vital and inevitable. This important thing becomes more important in emergencies and after unforeseen incidents. To achieve this goal, many efforts are being made to make housing faster, easier and cheaper.

Various structural systems, prefabricated, semi-prefabricated and constructed on site, have been developed to achieve this. Among the prefabricated and semi- prefabricated systems, there are prefabricated concrete frame systems and in-situ shear walls, LSF lightweight steel frame construction system, three-dimensional 3D paneled mesh and concrete mesh panels, concrete tunnel molds , ICF insulting concrete formwork system, steel structures system with bolted connections.

The disadvantages of these systems include high performance of the site, high cost of transportation and relocation of materials and equipment, the need for specialist equipment and specialized equipment and tools, constraints in architecture, low speed in emergency situations, Restrictions on implementation in different conditions of climate and harsh areas.

In conventional steel structures systems with bolted connection, due to the construction of multi-story columns, it leads to the construction, transport and installation of gravel. If there is a brace, it will create architectural limitations.

Due to the limitation of conventional steel structures with bolted joints,

The purpose of this invention is to achieve the following objectives

1. Modular manufacturing and mass production. 2. Installation is quick and easy and inexpensive without the need for heavy machinery.

3. Construction and installation of the column with the appropriate class upgrade and easy to carry and move.

4. The ability to install in hard conditions and difficult access routes.

5. Removal of stiffener plate welding operations on the fourth side of the column at the connection.

6. No need for the column continuity plate at the connection.

7. The ability to connect any type of cross section of the column together and each section of the beam with different heights.

8. Optimization and lightness of the structural system.

9. Easy to open and close the system and easy to move and reinstall.

10. Ability to develop the building at level and height after exploitation.

11. Connecting beams and columns at different horizontal and vertical angles.

12. Modular connection design for different openings and loads.

13. Reducing installation errors due to modular and prefabricated design.

14. Easy to repair and replace after damage and corrosion.

Previous technical knowledge status:

The construction of steel structures began in 1780, and the steel structure system with riveting joints from 1840 to 1940 was the main method of making steel connection. Since the 1920s, steel structures with weld joints have been developed. The construction of steel structures with bolts and nut has been officially launched since 1950. With the development of bolt and nut joints, a variety of joint and flexural connections were made. Today, construction systems are moving towards modular prefabricated buildings, which are fast and economical, and economically feasible. Steel structures with bolted connection are invented and developed in this direction. But due to the problems that still exist in the construction, transport and installation of these systems, it is necessary to reduce the problems with innovations. In this regard, a hexagonal flange connection is recommended.

Providing a solution along with a detailed description of the invention:

Hexagonal flange bending is a kind of bolted connection that connects columns and beams to the flange. This connection is made of two orthogonal plates in the shape of +, at its upper and lower levels, flange plates for flange connection of columns. In four faces of the perimeter, four plates of flanges for mounting flanges of beams are installed. If needed, along the flange of the column, along with the horizontal connection flange, stiffener similar to the cross section of the column is fitted with grooving and welding.

At the upper end of the lower column, the horizontal flange connection plate is attached so that a six-sided connection can be mounted on it. The connection of this flange plate to the column is made by welding, as well as two orthogonal plates in the form of +, which are flanged to the flanges and the slots embedded in the web column are welded and play a hardening role. On the edges of the flange plate, the column and the orthogonal plates of the column also have vertical connecting plates connected to the vertical flange plate of the six-axis joints. In the lower end of the upper column, similarly, the connecting sheets are installed.

At the end of the beams, the flange plate and stiffener plate are connected to the welding operation. All welding and drilling operations are done at the factory. The hexagonal connection unit is built in a single unit without the connection to the beam and the column, and is transported to the installation site. At both ends of the beams and columns, the flange connection plates are welded at the factory and transported to the installation site. The maximum length of the columns is equal to the maximum height of the floor and the maximum length of the beams is equal to the maximum span between the columns.

After installing the column on the site, the hexagonal element is placed on a plate of flange of the column and connected by bolts and nuts to the horizontal plates.

In this step, the bolts and nuts are not connected to the vertical flange plate joints of the column and hexagonal element.

Then the beams are placed in the desired location and connected by a number of bolts and flanges of the flanges of beams and hexagonal elements. The upper floor column is also installed on the upper surface of the hexagonal element. At this stage, by installing all the bolts of the flange connection of the beam, the vertical connecting plates of the column and the hexagonal element are connected. A number of bolts simultaneously connect the plate of the beam and the hexagonal element and the column connecting plate.

In order to simplify the procedure, it is possible to connect the hexagonal joining element to the factory on the lower column with the welding operation, and on the installation site, only the beams and the upper column with bolts and nuts. In this case, the flange connection of the lower column is removed.

Figure 1: Orthogonal sheets in the hexagonal core

Figure 2: stiffener box in the hexagonal core, if needed

Figure 5: Peripheral Flange plates for the installation of beams

Figure 6: Flanged plate of columns and orthogonal hardening plates

Figure 7: Connection of the flange plate to the column and the vertical connection plate

Figure 8: Preparing the bottom column for installing a hexagonal element

Figure 9: Initial installation of the hexagonal element on the column

Figure 10: Initial installation of beams to the hexagonal element

Figure 11: Install the top column on the hexagonal element and the final tightening of the bolts

Benefits of Invention:

1. Construction and installation of columns, matched to the height of the floor and easy to carry: Basically, one of the main reasons for designing this type of connection is the construction of a column with a height of one floor, so carrying the column to the installation site is easy. Even with a canner or a truck, it is carried to the installation site and is even portable and movable even under severe conditions.

2. Easy and quick installation without heavy cranes: Due to the fact that all beams and columns are suitable for the length of the span and floor height, without the need for heavy machinery and under different environmental and climate conditions, it is possible to install the structure. There are no problems with stiffener plate to the fourth side of the column: Due to the column's discontinuity, there are no stiffener plate welding problems on the fourth side of the column.

No need for continuity plate in the column at the connection: Due to the fact that the columns are connected by a flanged connection to a hexagonal element, the flanged sheet of weld to the end of the column plays a stiffener role.

Precise quality control and proper construction quality: Due to the fact that all welding operations are carried out at the factory and the connection element is also small, quality control is easily done at the factory.

The ability to connect any type of column to each type of beam: Depending on the type of connection and also the breakage of the column in the floor level, each column can be reduced to the dimensions of the column or from different sections of the column in each floor. Also, different sections of the beam can be used on each side of the connector.

Connecting the beam with different heights: Due to the fact that the beams are flanged to the connecting element, a beam of different heights can be attached to the hexagonal element.

Connecting beams and columns at various horizontal and vertical angles: In this type of connection, beams can be connected to different horizontal and vertical angles as well as columns with different vertical angles to the hexagonal element.

System prefabricated: All welding and perforation operations are carried out at the factory, and only assembling and tightening the screws are carried out at the installation site. The TC-BOLT can be used to ensure that the screws are pre-tensioned as well as the ease of control.

Modular construction and mass production: Due to the fact that the hexagonal element is separated from the beam and the column can be used to produce a massive and uniform hexagonal element for a variety of beam lengths and floor heights. It is also applicable to the construction of large halls of one or more floors and beams of the same length.

Optimization and lightness of the system: Due to the short lengths of the columns, as well as the design of a separate column for each floor, the design can be perfectly optimized.

Installation and opening: Due to the short columns and the bolt connection, it is easy to install the structure in cases requiring temporary construction and then open it and use it at a different location.

Assembly and disassembly capability: Due to the shortness of the columns and the bolted connection, it is easy to assemble the structure in cases requiring temporary construction, and then disassemble it and assemble it at another location.

Ability to develop a building in the area of the floor and height: after installing part of the structure, it can be exploited, and during operation, the development of the building in the area and increase the floor. It is also possible to use this system in the construction of large halls of one or several floors.

Connection design capabilities for different lengths of the beam and different loading: Designing a design table for different beam lengths and different column heights can be designed and used when needed.

educing installation errors due to modularity and manufacturing in the factory and easy installation: Due to the fact that all cutting, punching and welding operations are carried out at the factory site and there are no assembly plate individually, the beams and columns are connect to the connecting element without a cover plate, Installation error is minimized.

Easy to repair and replace after damage: Due to the discontinuity of the column and the presence of flange connection, it is possible to detach part of the structure that is damaged and install a healthy beam and column instead. 18. No architectural limitations due to bending connections: Due to the lack of use of braces against lateral loads, there is no architectural limitation in design.

An Invention Execution Method:

After making beams and columns and installing flanged and stiffener plate and making a hexagonal joining element in the factory, the following steps are taken to install them.

1. Proper implementation of the foundation according to the drawings in place or using prefabricated foundation.

2. Transportation of beams and columns and hexagonal joints to the installation site

3. Installation of the first floor columns on the foundation.

4. Initial installation of the hexagonal element on the columns

5. Initial installation of all first floor beams

6. Initial installation of all columns of the second floor

7. Complete all connecting screws and initial tightening operations and final tightening of all screws

8. Repeat the previous steps to install the next floor

Industrial application

The characteristics of this type of connection system make it possible to use the following and justify its use.

1. Easy transportation of structures to hard-to-reach areas and dense areas without the need for heavy machinery for installation, it is justifiable for dense urban, mountainous and even critical areas. . Due to quick assembly and easy disassembly, temporary structures can be used. Such as exhibition structures, hospitals and temporary relief centers, temporary shelters and other items requiring transportation of structures. 3. The ability to carry and install quickly in emergencies, which is critical to the construction of the structure, also distinguishes this type of structure. Such as the rapid establishment of relief centers

Due to prefabricated and large-scale production, it is possible to undertake a large number of emergency shelters in times of crisis. Such as the construction of damaged houses after natural disasters.

5. Due to the ease of installation and without the need for skilled worker, it is possible to teach beginners with quick instructions and quick training. This feature is very helpful in times of crisis.

Claims

Claim letter:

1. All beams and columns shall be constructed according to the length of the span and floor height.

2. Due to the breakdown of the column, there are no hardening welding problems on the fourth side of the column.

3. Due to the fact that the columns are connected by a flanged connection to a hexagonal element, the flanged plate of the flanged to the end of the column plays a stiff ener role.

4. Due to the fact that all welding operations are carried out at the factory, and the hexagonal connection element is also small, quality control is carried out with ease at the factory.

5. Different sections of the column can be used on each floor, as well as different sections of the beam can be used in each side of the connector.

6. The beams with different horizontal and vertical angles and also columns with different vertical angles can be connected to the hexagonal element.

7. The assembly operation is carried out at the factory and the assembly and tightening operations of the screws are carried out at the installation site. The TC- BOLT can be used to ensure that the screws are pre-tensioned as well as the ease of control.

8. The massive and uniformity of the hexagonal element is available for all types of spans and floor heights.

9. Due to the short length of the columns, the design of the column is done individually for each floor and the design is optimized.

10. Due to the shortness of the columns and the connection of the bolts and nuts in cases where the construction of a temporary and fast construction is required, the structure can be constructed and then opened.

11. After installing a part of the structure and exploiting it during operation, it is possible to develop it in the level and increase the floor.

12. By providing typical tables and drawings for different spans of the beam and different column heights, typical connections are designed and used when needed.

13. The beams and columns are mounted directly to the hexagonal element without the need for a cover plate by bolts and nuts and the installation error is minimized.

14. After exploitation, if part of the structure is damaged, it is removed during operation and without interruption and a new beam and column are installed instead.

15. Because of not using braces in bearing forces, there are no architectural limitations in the design of openings.