CN109944325A - A prefabricated composite node connecting device composed of I-shaped composite beams - Google Patents

Abstract

The present invention relates to a kind of assembled combined joint attachment devices being made of drum combination beam, belong to structural engineering field.The device includes the quadrate steel pipe column with cantilever beam section, a drum combination beam section, one group of combined connection apparatus and two reinforced concrete floors；Top flange cover board and lower flange cover board are dog bone weakening type cover board, and beam-ends reinforcement is carried out to cantilever beam section, make to destroy when earthquake and only occurs in splice region, and elasticity is kept in other sections, it only needs that the functional rehabilitation of structure can be realized by replacing connecting plate after shake, beam section is combined instead of I-shaped beam section by the drum that two inverted L shape beam sections and an inverted T shaped beam section form, before in-site installation by armored concrete together with inverted L shape beam section is by rivet interlacement, inverted L shape beam section and inverted T shaped beam section are assembled together when in-site installation, improve construction efficiency.

Description

A prefabricated composite node connecting device composed of I-shaped composite beams

technical field

The patent relates to an assembled composite node connecting device composed of I-shaped composite beams, belonging to the field of structural engineering.

Background technique

The prefabricated steel structure building is a green building in the whole life cycle, which has the characteristics of standardized design, factory production, prefabricated construction, integrated decoration, and information management. Vigorously promoting prefabricated steel structure buildings can reduce construction waste and construction dust pollution, shorten the construction period, improve project quality, digest excess steel capacity, and form a strategic steel reserve.

The prefabricated steel structure building system has become a new direction and new trend in the development of building steel structures, with the advantages of design standardization, factory production, construction assembly, green building energy saving and environmental protection. Among them, the connection method of components occupies an important part. The traditional steel frame is often welded in the construction process on site. However, due to the complex environment of the construction site, the construction quality of the welding is not easy to grasp. The bolted connection can better control the construction quality, but there are certain design difficulty. How to keep the welding work in a factory with a better working environment and only perform bolt connection on the construction site is an important issue in the field of assembly construction.

For the combined joint form composed of I-shaped steel and reinforced concrete floor, although it ensures the overall bearing capacity of the combined joint and has good mechanical performance, it is considered that it has a high construction difficulty in the construction process, and the earthquake Later, due to its high integrity, the reinforced concrete floor slab is welded on the beam, and the replacement of the connecting device is more complicated, which loses the practical application significance of the combined node.

In order to overcome the above problems, this patent proposes a prefabricated composite node connection device composed of I-shaped composite beams. The I-shaped composite beam section consisting of two inverted L-shaped beam sections and an inverted T-shaped beam section replaces the I-shaped beam section. Before the on-site installation, the reinforced concrete and the inverted L-shaped beam section are connected together by rivets. The inverted L-shaped beam section and the inverted T-shaped beam section are assembled together, which is convenient and quick when the floor slab needs to be replaced, and improves the construction efficiency.

SUMMARY OF THE INVENTION

The invention proposes a prefabricated composite node connecting device composed of I-shaped composite beams, which aims to reduce the difficulty of replacing components and improve the practical application value of the composite node form.

For achieving the above object, the present invention adopts the following technical means:

A prefabricated composite node connection device composed of I-shaped composite beams is characterized in that: the device comprises a square steel pipe column with a cantilever beam section, an I-shaped composite beam section, a set of composite connecting devices and two reinforced concrete Floor; the square steel pipe column with cantilever beam section includes an upper steel pipe column, a middle steel pipe column, a lower steel pipe column and a cantilever beam section, the upper end of the middle steel pipe column is welded with the upper steel pipe column, and the lower end is welded with the lower steel pipe column. The cantilever beam section is welded on the Chinese steel tube column; the I-shaped composite beam section includes an inverted T-shaped beam section, two inverted L-shaped beam sections and several positioning plates, and the two inverted L-shaped beam sections are listed in the inverted T-shaped beam section. The web of the beam section is arranged symmetrically on both sides, and the two inverted L-shaped beam sections and the inverted T-shaped beam section are connected by high-strength bolt groups. Positioning plates are welded on both sides of the web of the inverted T-shaped beam section, and the positioning plate is connected to the inverted L-shaped beam. The top of the section is tight, so that the positioning plate can be used as the support for the inverted L-shaped beam section; the square steel tube column with the cantilever beam section and the I-shaped composite beam section are connected by a combined connecting device, and the two upper flange cover plates are located on the cantilever. The inner side of the upper flange of the beam segment is arranged symmetrically on both sides of the web of the cantilever beam segment, and the two web connectors are arranged symmetrically on both sides of the web of the cantilever beam segment, connecting the web of the cantilever beam segment and the inverted T-beam Section web, a lower flange cover plate is located outside the lower flange of the I-shaped composite beam section, the upper flange cover plate and the lower flange cover plate are dog-bone weakened cover plates, and the beam end of the cantilever beam section is carried out. Strengthening, so that the damage only occurs in the splicing area during the earthquake, while maintaining elasticity in other sections, and the functional recovery of the structure can be achieved only by replacing the connecting plate after the earthquake; Welding rivets on the two inverted L-shaped beam sections, reinforced concrete The floor slab is welded on the rivets and connected with the I-shaped composite beams by the rivets.

The upper cover plate of the flange of the device adopts an inner cover plate design, which is convenient for connection with the floor slab, and the lower flange cover plate adopts an outer cover plate design. The cantilever beam section and I-shaped composite beam in the square steel tube column with cantilever beam section The bolts at the lower flange of the section are arranged asymmetrically. The purpose is to install the lower flange cover plate of the cantilever beam section first. The lower flange cover plate can be used as a support for the I-shaped composite beam section during the installation process, speeding up the construction speed and improving the construction. Quality, adapt to the development of prefabricated steel structures.

The advantages of this patent are mainly reflected in the following aspects:

1. The I-shaped composite beam composed of the inverted T-shaped beam section and the inverted L-shaped beam section has good post-earthquake replaceability. In the composite node composed of the reinforced concrete floor and the I-shaped beam, due to the high integrity , it is more difficult to replace the damaged components after the earthquake, and the combined node composed of the I-shaped composite beam and the reinforced concrete has a high degree of assembly, which reduces the difficulty of replacing the components after the earthquake.

2. The positioning plate set on the web of the inverted T-beam can play a positioning role when installing the inverted L-shaped beam section. During construction, the floor can be placed on the positioning plate and then connected with high-strength bolts, which reduces the difficulty of construction and improves the At the same time, it can play a supporting role in the installation of the inverted L-shaped beam section, and provide a certain bearing capacity before the high-strength bolts act.

3. The upper flange cover plate and the lower flange cover plate at the nodes of the device are all dog-bone weakened cover plates. Due to the weakening of the cover plate and the strengthening of the beam end, the damage occurs only on the cover plate at the splicing point during the earthquake. Other parts remain elastic, and the function of the structure can be restored by replacing the cover after the earthquake.

4. In this system, the upper flange cover is set as an inner cover, which can make the outer concrete of the upper flange more flat, and the lower flange cover is set as an outer cover, which can be used as the I-beam during the installation process. At the same time, it is also convenient for the node to observe the buckling deformation of the flange cover plate during use, which has good performance visibility and replacement judgment.

5. The welding parts of each component and node connection device of the device are completed in the factory, and the welding accuracy and quality are easier to control. Only high-strength bolts are used to assemble each component on site, and the inverted T-shaped beam section and the inverted L-shaped beam section are composed of sections. The formed combined I-beam section replaces the I-shaped steel beam section, which improves the overall modular installation degree and can improve the construction efficiency and construction quality.

Description of drawings

Fig. 1 is a kind of prefabricated composite node connecting device composed of I-shaped composite beam;

Fig. 2 is a kind of prefabricated composite node connecting device composed of I-shaped composite beams;

Fig. 3 is an assembled composite node connecting device composed of I-shaped composite beams.

Detailed ways

The embodiments of the present patent will be described in detail below with reference to the accompanying drawings.

As shown in Figures 1-3, a prefabricated composite node connecting device composed of I-shaped composite beams includes the following components.

1—square steel tube column with cantilever beam section;

2 - I-shaped composite beam section;

3——Combination connecting device;

4 - reinforced concrete floor;

5 - upper flange cover;

6—lower flange cover;

7 - web connector;

8 - the upper steel pipe column;

9 - Chinese steel pipe column;

10—the lower steel pipe column;

11—cantilever beam segment;

12——Inverted T-beam section;

13——Inverted L-shaped beam section;

14 - positioning plate;

15 - Rivets.

As shown in Figures 1-3, the device includes a square steel tube column (1) with a cantilever beam section, an I-shaped composite beam section (2), a set of composite connecting devices (3) and two reinforced concrete floor slabs (4). ); the square steel pipe column (1) with a cantilever beam section includes an upper steel pipe column (8), a middle steel pipe column (9), a lower steel pipe column (10) and a cantilever beam section (11). The upper end of the steel pipe column (9) is welded with the upper steel pipe column (8), the lower end is welded with the lower steel pipe column (10), and the cantilever beam section (11) is welded on the middle steel pipe column (9); the I-shaped composite beam section (2) It includes one inverted T-shaped beam section (12), two inverted L-shaped beam sections (13), and the two inverted L-shaped beam sections (13) are arranged symmetrically on both sides of the web of the inverted T-shaped beam section (12), The two inverted L-shaped beam sections (13) and the inverted T-shaped beam section (12) are connected by high-strength bolt groups, and the positioning plates (14) and the positioning plates (14) are welded on both sides of the web of the inverted T-shaped beam section (12). Tighten the inverted L-shaped beam section (13) to support the inverted L-shaped beam section (13); the combined connection device (3) includes two upper flange cover plates (5) and a lower flange cover plate (6), two web connectors (7) and high-strength bolt groups.

As shown in Figure 1, the square steel pipe column (1) with the cantilever beam section and the I-shaped composite beam section (2) are connected by a combined connection device (3), and the cantilever beam section (11) is connected to the I-shaped composite beam section ( 2) There is a gap of 15mm-25mm; the upper flange cover (5) is set as an inner cover, and the lower flange cover (6) is designed as an outer cover, the purpose is to install the lower part of the cantilever beam section first. The flange cover plate (6) and the lower flange cover plate (6) can be used as supports for the I-shaped composite beam section (2) during the installation process, and rivets (15) are welded on the two inverted L-shaped beam sections (13). ), the reinforced concrete floor slab (4) is welded on the rivet (15), and is connected with the I-shaped composite beam section (2) through the rivet (15).

As shown in Figure 3, in the described I-shaped composite beam section (2), the bolt spacing of the web connection part of the inverted L-shaped beam section (13) and the inverted T-shaped beam section (12) should be 150mm-300mm, The height of the L-shaped beam section (13) connected to the web of the inverted T-shaped beam section (12) should be 1/3-1/2 of the height of the inverted T-shaped beam section (12), and the inverted L-shaped beam section (13) The width of the part not connected to the web of the inverted T-shaped beam segment (12) shall be half the width of the lower flange of the inverted T-shaped beam segment (12), and the sum of the widths of the two inverted L-shaped beam segments (13) is the inverted T-shaped beam segment (13). The width of the lower flange of the beam section (12); the bolts of the positioning plate (14) and the connecting part of the web of the inverted L-shaped beam section (13) and the inverted T-shaped beam section (12) are arranged correspondingly. Two positioning plates (14) are arranged at corresponding positions below the bolts, and the two positioning plates (14) are symmetrically arranged on both sides of the web.

Claims (3)

1. a prefabricated composite node connecting device composed of an I-shaped composite beam is characterized in that: the device comprises a square steel pipe column with a cantilever beam section, an I-shaped composite beam section, a group of composite connecting devices and two Reinforced concrete floor slab; the square steel pipe column with cantilever beam section is welded by an upper steel pipe column, a middle steel pipe column, a lower steel pipe column and a cantilever beam section, the upper end of the middle steel pipe column is welded with the upper steel pipe column, and the lower end is welded The lower steel pipe column is welded with a cantilever beam section on the Chinese square steel pipe column; the I-shaped composite beam section includes an inverted T-shaped beam section and two inverted L-shaped beam sections, and the two inverted L-shaped beam sections are arranged in the inverted T-shaped beam section. The web of the beam section is arranged symmetrically on both sides, and the two inverted L-shaped beam sections and the inverted T-shaped beam section are connected by high-strength bolt groups. Positioning plates are welded on both sides of the web of the inverted T-shaped beam section, and the positioning plate and the inverted L-shaped beam are welded. The section top is tight, and the inverted L-shaped beam section is supported; the combined connection device includes two upper flange cover plates, one lower flange cover plate, two web connecting pieces and high-strength bolt groups; There is a 15-25mm wide gap between the square steel tube column and the I-shaped composite beam section, and the two are connected by a composite connecting device. The two upper flange cover plates are located inside the upper flange of the cantilever beam section, and are arranged in the The web of the beam section is arranged symmetrically on both sides, and the two web connectors are arranged symmetrically on both sides of the web of the cantilever beam section, connecting the web of the cantilever beam section and the inverted T-beam section web, and a lower flange cover is located at the The outer side of the lower flange of the I-shaped composite beam section; rivets are welded on the two inverted L-shaped beam sections, and the reinforced concrete floor slab is welded on the rivets, and is connected to the I-shaped composite beam section by rivets. 2 . The prefabricated composite node connection device composed of I-shaped composite beams according to claim 1 , wherein: in the described I-shaped composite beam sections, the webs of the inverted L-shaped beam section and the inverted T-shaped beam section are 2. 3 . The bolt spacing of the connecting part should be 150mm-300mm, the height of the part where the inverted L-shaped beam section and the web of the inverted T-shaped beam section are connected should be 1/3-1/2 of the height of the inverted T-shaped beam section, and the inverted L-shaped beam section The width of the part not connected to the web of the inverted T-beam should be half the width of the lower flange of the inverted T-beam, and the sum of the widths of the two inverted L-beams is the width of the lower flange of the inverted T-beam. 3. A prefabricated composite node connection device composed of an I-shaped composite beam according to claim 1, characterized in that: in the described I-shaped composite beam section, the positioning plate, the inverted L-shaped beam section and the inverted T-shaped beam The bolts of the connecting part of the segment web are arranged correspondingly, that is, for each bolt arranged, two positioning plates are arranged at the corresponding positions below the bolts, and the two positioning plates are arranged symmetrically on both sides of the web.