CN202831237U - Shaft flange joint structure for assembly-type cold rolled section steel structure connection - Google Patents

Abstract

The utility model discloses an assembly type cold-formed steel structure connection pin shaft flange node structure belonging to the technical field of structural engineering steel structures. The upper and lower ends of the column casing are welded with casing flanges, the upper and lower chords of the truss beam are welded to the column casing, and the web is welded between the two chords; The casing is plugged in, and the connection between the column pipe and the casing is fastened by bolts to the column flange and the casing flange, thus forming a pin flange joint structure. The pin shaft flange joints of the beam-column connection of the utility model have reasonable structure, high rigidity, large bearing capacity surplus, reliable joint connection, and can meet the design requirements of "strong joints and weak rods". The prefabricated obliquely supported cold-formed steel structure floor using this kind of joint has sufficient bearing capacity and can meet the requirements of normal use.

Description

A pin shaft flange joint structure connected by assembled cold-formed steel structure

technical field

The utility model relates to the technical field of structural engineering steel structures, in particular to a pin shaft flange node structure connected by an assembled cold-formed steel structure.

technical background

Prefabricated cold-formed steel structure buildings have the advantages of simple construction, convenient assembly and disassembly, and environmental protection. They are in line with the development direction of housing industrialization, are conducive to the development of my country's low-carbon economy and the implementation of sustainable development strategies, and have good comprehensive benefits. Among them, the mechanical characteristics of the beam-column joints have a great influence on the load-bearing performance of the steel frame. At present, the beam-column joints used in the prefabricated cold-formed steel structure mainly include welding and bolt-welding connections. Among them, the welding rigidity is relatively high, brittle fracture is prone to occur, and the seismic performance is poor; while the bolted welding connection construction cannot better meet the requirements of industrialization and construction assembly of fabricated cold-formed steel structures.

In order to give full play to the advantages of short construction period, low-carbon and environmental protection of the prefabricated cold-formed steel structure, and to ensure reliable structural stress and good seismic performance, it is necessary to invent a new type of joint for the prefabricated cold-formed steel structure. Research on the new joint form of beams and columns and its application in prefabricated cold-formed steel structures is of great significance to the popularization and application of prefabricated cold-formed steel structures and the development of the entire steel structure industry. Problems to be solved.

Utility model content

The purpose of this utility model is to propose an assembly type cold-formed steel structure connection in view of the oblique support cold-formed steel assembled building structure in the prior art that cannot meet the requirements of standardization, production industrialization, construction assembly and good bearing performance. Pin flange joint structure. It is characterized in that the upper and lower ends of the column casing 4 are welded with casing flanges 2, the upper and lower chords 8 of the truss girder are welded on the column casing 4, and the joints between the chords 8 and the column casing 4 are welded with stiffeners 7, and weld the web 9 between the upper and lower chords 8; the upper and lower column tubes 10 are plugged in the column casing 4 through the column liner 11, and the connection between the column tube 10 and the casing 4 is connected by bolts 12 Fasten the column flange 1 and the casing flange 2 to form a pin flange joint structure.

The column flange is set on the column tube and fixed by welding, and the flange reinforcement plate 6 is welded at the joint between the column flange 1 and the column tube 10

The column flange is a square frame with integral structure with equidistant screw holes on four sides.

The casing flange has the same size and shape structure as the column flange, but is divided into 2 halves or 4 halves.

The column sealing plates 3 are welded in the upper and lower column tubes 10 plugged in the column casing 4, the column liner 11 is fixed at both ends of the column liner tube sealing plates 5, and the column liner 11 is placed on the upper and lower column tubes. 10 between the column sealing plates 3; for increasing the load-bearing capacity of the column casing 4.

The beneficial effect of the utility model is that the pin shaft flange node structure of the present invention has the following characteristics:

1. The advantages of simple construction, convenient assembly and disassembly, etc., and because the deformation of the truss beam in the joint of this connection form drives the deformation of the column tube through the casing and the flange, and the column tube is inserted in the casing, so under the action of the earthquake, when the casing When the bolt connection between the pipe flange and the column flange fails, it can still bear a certain load, still has a certain deformation capacity and energy dissipation capacity, and has good seismic ductility.

2. According to the finite element calculation and analysis results, the pin shaft flange joints connected by beams and columns have reasonable structure, high rigidity, large bearing capacity surplus, and reliable joint connections, which can meet the design requirements of "strong joints and weak members" . The prefabricated obliquely supported cold-formed steel structure floor using this kind of joint has sufficient bearing capacity and can meet the requirements of normal use.

Description of drawings

Figure 1 is a schematic plan view of the application of the pin flange joint in the assembly unit.

Figure 2 is the flange plan view of the pin flange joint, where A is the column flange and B is the sleeve flange.

Figure 3 is a specific structural diagram of the pin flange joint.

Detailed ways

The utility model proposes a pin shaft flange node structure connected by an assembled cold-formed steel structure. Describe below in conjunction with accompanying drawing.

In Figure 3, the upper and lower ends of the column casing 4 are welded with casing flanges 2, the upper and lower chords 8 of the truss beam are welded on the column casing 4, and the joints between the upper and lower chords 8 and the column casing 4 are welded with stiffeners Rib 7, and weld the web 9 between the upper and lower chords 8; the column flange is set on the column tube and fixed by welding, and the flange reinforcement plate 6 is welded at the connection between the column flange 1 and the column tube 10 ; In the upper and lower column tubes 10, the column sealing plates 3 are welded, the column liner tube sealing plates 5 are fixed at both ends of the column liner tube 11, and the shaft cutting flange and the upper and lower column tubes 10 pass through the column flange 1 on the column The casing 4 is plugged in, and the column liner 11 is placed between the column sealing plates 3 of the upper and lower column tubes 10 to increase the load-bearing capacity of the column casing 4; the column tube and the column casing are connected by bolts 12 Fasten the column flange 1 and the casing flange 2 to form a pin flange joint structure.

The structure of the main board of the floor and the splicing between the main boards are shown in Figure 1.

The column flange is a square frame with integral structure with equidistant screw holes on four sides. The casing flange and the column flange have the same shape and structure, but are divided into two halves or four halves, which is convenient for splicing between assembly units, as shown in Figure 2, where A is the column flange, and B is the casing flange.

The specific manufacturing and installation process of the pin flange joint is as follows:

The main design idea is to weld the upper and lower chords of the truss girder to the column casing, and the truss beam, column casing and other support members are welded to form a single-story floor main board structure, and each single-story floor main board structure The plan view of the prefabricated and floor assembly unit is shown in Figure 1; during construction, the square pipe column and the column casing are connected through flanges, and the upper and lower column pipes are inserted in the casing, and the joint structure is shown in Figure 3. At the same time, in order to clarify the mechanical performance of this new type of joint, through the finite element method, the bearing capacity and natural vibration frequency of the pin flange joint and the prefabricated cold-formed steel structure floor applying this special joint are analyzed. Thus, the load-bearing performance of the prefabricated cold-formed steel structure floor using this new type of joint and the influence of the pin flange joint on the load-bearing performance of the floor are obtained.

The assembly process of the main board structure and the column is as follows: the column flange is welded at half the height of the casing from the end of the column tube, and the column tube and the casing are connected through the flange. The connection of the upper and lower column tubes in the casing is a plug-type connection, that is, a column sealing plate is welded in the column tube near the column end (about 10cm), and the column liner is welded to the sealing plate of the lower column. The outer diameter of the liner A certain gap is reserved between the inner diameter of the column tube, and the upper column tube and the lower column tube are inserted through the liner in the casing. A certain gap is reserved between the outer diameter of the column tube and the inner diameter of the column casing. The specific structure of the node is shown in Figure 3.

The bolts in the flange connection between the column casing and the column are in accordance with the national standard GB5783-2000, using 45#, 8.8-grade friction-type high-strength bolts, M20, the hole diameter is Φ24, and the pre-tensioning force is 12.5T. The bolt spacing and bolt hole edge distance are determined according to the "Code for Design of Steel Structures" (GB50017-2003) and the load-bearing capacity requirements of the joints. The column flange (see Figure 2 in A) and casing flange (see Figure 2 in B Figure) floor plan.

The specific size and model of the connected components of the pin flange joint are as follows:

Claims (5)

1. An assembled cold-formed steel structure connection pin flange joint structure, characterized in that the upper and lower ends of the column casing (4) are welded with casing flanges (2), and the upper and lower two chords of the truss beam (8) Welded on the column casing (4), the stiffener (7) is welded at the connection between the chord (8) and the column casing (4), and the web is welded between the upper and lower chords (8) ( 9); the upper and lower column tubes (10) are plugged into the column sleeve (4) through the column liner (11), and the connection between the column tube (10) and the sleeve (4) is connected by bolts (12). The flange (1) and the casing flange (2) are fastened, thereby forming a joint structure of the pin shaft flange. 2. According to claim 1, an assembly-type cold-formed steel structure connection pin flange joint structure is characterized in that, the column flange is sleeved on the column tube and fixed by welding, and the column flange ( 1) Weld the flange reinforcement plate (6) at the joint with the column tube (10). 3. A pin flange joint structure for fabricated cold-formed steel structure connection according to claim 1, characterized in that the column flange is a square frame with equidistant screw holes on four sides. 4. According to claim 1, a pin flange joint structure connected by fabricated cold-formed steel structure is characterized in that, the casing flange and column flange have the same size and shape structure, but are divided into two halves or quarters. 5. An assembled cold-formed steel structure connection pin shaft flange node structure according to claim 1, characterized in that, the upper and lower column tubes (10) inserted in the column casing (4) Each inner welded column sealing plate (3), fixed column liner sealing plate (5) at both ends of the column liner (11), the column liner (11) is placed on the column sealing plate (3) of the upper and lower column tubes (10) Between; used to increase the load-bearing capacity of the column casing (4).

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