CN207846687U - Prefabricated assembled modularization frame node - Google Patents

Abstract

The utility model provides a prefabricated assembled modular frame node. The prefabricated H-shaped steel concrete columns are respectively connected to the top and/or bottom of the node module through bolts to realize the connection of the columns, and the H-shaped steel beams are connected in the horizontal direction of the node module through bolts and welding. The side of the horizontal beam-column is connected; when the construction site is assembled, the prefabricated and processed node modules are directly hoisted to the top of the prefabricated column for installation, and then the steel beam-upper prefabricated column is reliably connected by high-strength bolts and welding methods. , easy to operate; the steel structure splicing technology can greatly shorten the construction period and improve assembly efficiency. The core area of the node is connected by bolts and welding without steel bars, which can effectively avoid complex cross construction in the core area of the node, difficult reinforcement binding and post-casting Concrete and formwork support and other issues have achieved the design goals of the prefabricated assembly structure being safe, reliable, efficient, cost-controllable, and environmentally friendly.

Description

A prefabricated modular frame node

technical field

The utility model relates to the construction field, in particular to a prefabricated assembly type modular frame node.

Background technique

Since the 21st century, people have put forward new requirements for building energy conservation and building environmental protection. The development of building industrialization is one of the current trends in the development of building technology in the world. Compared with the traditional cast-in-place method, the use of prefabricated buildings has many advantages, such as short construction period, energy saving and consumption reduction, environmental protection, and the ability to ensure construction quality and speed up urbanization. In 2016, the Central Committee of the Communist Party of China and the State Council successively issued relevant documents on prefabricated buildings, proposing to develop new construction methods, develop prefabricated concrete structures, steel structures and modern wooden structures according to local conditions, and strive to make prefabricated buildings account for about 10 years. The proportion of new buildings reaches 30%. It can be seen that the promotion of prefabricated buildings is an inevitable choice for the transformation and upgrading of my country's current traditional construction industry. The biggest difference between the prefabricated concrete structure and the cast-in-place concrete structure lies in the prefabrication in the factory and the splicing on site. Frame joints are key parts connecting beams and columns. This is also the current weak point of the structure, which restricts the promotion and application of prefabricated structures. Since the prefabricated components are manufactured and maintained in the prefabricated factory, their pouring quality and component strength will be better than those on site.

In recent years, Chongqing University has used new steel joints to connect fabricated joint specimens to investigate the mechanical performance of steel joints. The results show that this type of node has high bearing capacity and seismic performance, good work performance and can be used in practical engineering. Cheng Wanpeng from Dalian University of Technology carried out comparative tests on 8 PPSRC and 6 RC beam-column joint assemblies. The research shows that the prefabricated connection method of the design is reliable and conforms to the structural seismic criterion of "strong nodes and weak members, strong columns and weak beams".

H.-K.Choi a installed steel joint heads inside the beam-column joints, and installed steel plates at the ends of prefabricated beams for post-splicing to form connection joints. The aseismic performance of the new joint is studied by carrying out a reciprocating loading test on one cast-in-place comparison specimen and four prefabricated specimens. Haider Hamad Ghayeb conducted a reciprocating loading test study on 2 cast-in-place nodes and 2 prefabricated nodes with steel joints, and the results showed that the prefabricated joints have good resistance to prefabricated frame joints under seismic loads.

So far, research on prefabricated frame joints at home and abroad has achieved certain results, but there are still deficiencies:

Beam-column joint connections mostly adopt wet connection, which is inconvenient for construction. Composite beams and composite slabs are widely used in assembled monolithic concrete structures, and the steel grout anchor connection between different components is then cast-in-situ to form wet connections such as nodes. In this way, on the one hand, the degree of industrialization is reduced, and on the other hand, the requirements for on-site construction are very high, because the overall structural design of the assembled integral concrete structure is designed according to the cast-in-place structure, once the node connection cannot meet the requirements of the cast-in-place concrete structure The entire structure is at risk.

The connection parts are mainly concentrated in the column edge or inside the joint core area, which makes the construction of the joint area complicated and difficult to guarantee the construction quality.

According to the idea of strong joints and controlling the hinge at the end of the beam, the joints can realize the plastic hinge outward movement under the action of the earthquake load, and the methods of opening holes in the beam web and cutting the beam flange into a dog-bone type are often used, but this has limitations. It is not suitable for ordinary reinforced concrete beams.

The research on the joint connection mode of stiffened concrete beams and columns is also limited to the bolted welding connection or the reinforced ring connection at the column edge. Not only is the construction complicated, but the joint size is often limited by the building's use function.

Utility model content

Aiming at the deficiencies of the prior art, the utility model provides a prefabricated assembled modular frame node, which consists of prefabricated H-shaped steel concrete columns, H-shaped steel beams, and node modules connected by welding and bolts. The connection is reliable and easy to operate. Simple, can greatly shorten the construction period, improve assembly efficiency.

The utility model adopts technical scheme as follows:

A prefabricated assembled modular frame node, including prefabricated H-shaped steel concrete columns, H-shaped steel beams and node modules;

The prefabricated H-shaped steel concrete columns are respectively connected to the top and/or bottom of the node module by bolts to realize the connection of the columns, and the H-shaped steel beams are connected to the horizontal side of the node module by bolts and welding to realize the connection of horizontal beams and columns;

The node module includes node upper cover plate, node lower cover plate, square steel pipe and lug plate. The four lug plates are vertically arranged and perpendicular to the four sides of the square steel pipe, and are connected to the front, rear, left, and right sides of the square steel pipe. The four lug plates are connected to the square steel pipe. After the connection, the joint upper cover plate and the node lower cover plate are respectively connected to the top and bottom of the four lug plates and the square steel pipe. The center of the joint upper cover plate is provided with a round hole for pouring concrete into the square steel pipe. Both the ear plate and the H-shaped steel beam are Bolt holes are opened, the web of the H-shaped steel beam is connected with the ear plate through the splicing plate, the flange plate of the H-shaped steel beam is welded with the upper cover plate of the node and the lower cover plate of the node respectively, and the spliced plate is connected with the H-shaped steel beam and the ear plate through bolts;

The H-shaped steel in the prefabricated H-shaped steel concrete column is connected with the node upper cover plate and/or the node lower cover plate through bolts.

Further, the prefabricated H-shaped steel concrete column includes H-shaped steel and a column end plate welded to the end of the H-shaped steel. Bolt holes are opened on the column end plate, and the column end plate is connected with the upper node cover plate and/or the lower node cover plate through bolts , Reinforcement holes are reserved at the four corners of the column end plate, and the positions of the reserved reinforcement holes correspond to the positions of the longitudinal reinforcement of the reinforcement cage.

Further, the joint upper cover plate and/or the lower node cover plate and the web of the H-shaped steel beam are trapezoidal, and the upper edge of the trapezoid is welded to the web of the H-shaped steel beam.

Further, four lug plates are welded to the centerline positions of the four sides of the square steel pipe.

Further, the four lug plates are welded to the square steel pipes and placed in the central area of the node upper cover plate and the node lower cover plate, and the node upper cover plate and the node lower cover plate are welded to the top and bottom of the four ear plates and the square steel pipes respectively.

Furthermore, the H-shaped steel beam flange plate and the horizontal beam-column flange plate are connected by a single-sided full-penetration weld with a V-shaped groove and a backing plate.

Further, the four lug plates are connected by the cross plate main board and the cross plate lug plate connected by vertical welding, and the cross welded cross plate main board and the cross plate lug plate are inserted into the gaps opened on the four sides of the square steel pipe, and welded with the square steel pipe to form overall.

The advantages of the prefabricated assembled modular frame node of the present utility model are as follows:

①Including prefabricated H-shaped steel concrete columns, H-shaped steel beams and node modules, the node modules are modularized, and the prefabricated and processed node modules are directly hoisted to the top of the prefabricated columns for installation during assembly on the construction site, and then connected to the steel beams by high-strength bolts and welding methods. Reliable connection between the beam and the upper prefabricated column is enough, and the operation is easy.

②Adopt the simple steel structure dry splicing method, and the steel structure splicing technology can greatly shorten the construction period and improve the assembly efficiency.

③The core area of the node is connected by bolts and welding without steel bars, which can effectively avoid problems such as complex construction in the core area of the node, difficulty in reinforcing reinforcement binding, poor concrete pouring and vibrating, cracking of concrete, and cost savings. Problems such as complex cross construction, difficulty in reinforcement binding, and support of post-cast concrete and formwork. The prefabricated prefabricated structure is safe, reliable, efficient, cost-controllable, and environmentally friendly, and it lays the foundation for further research on the new modular prefabricated SRC column-steel beam frame structure system.

④The new type of joint can realize the three-dimensional beam-column connection of up-down-left-right-front-back. When the structural system undergoes large plastic deformation, the plastic hinge at the beam-column interface can be moved outward, thereby protecting the joint to a certain extent. , in line with the seismic design requirements of "strong nodes, weak members".

Based on the novel prefabricated frame joint of the utility model, a novel frame structure system is further formed. The new frame structure system has a high degree of prefabrication, good seismic performance and durability, and can be used in large-span, super-high-rise public buildings, especially large shopping malls, office buildings, hospitals and schools. At the same time, it saves a lot of support formwork and shear stirrups, shortens the construction period and reduces the construction cost, and its application prospect is very wide.

Description of drawings

Figure 1 Schematic diagram of the overall structure of the prefabricated modular frame node;

Fig. 2 schematic diagram of node module decomposition;

Figure 3 Prefabricated modular frame node use status diagram 1;

Fig. 4 is a schematic diagram of the prefabricated modular frame node structure at A in Fig. 3;

Fig. 5 Prefabricated modular frame node use status diagram II;

Fig. 6 is a schematic diagram of the prefabricated modular frame node structure at A in Fig. 5;

In the figure: 1- prefabricated H-shaped steel concrete column; 11- H-shaped steel column end plate; 2- H-shaped steel beam; 3- node module; 31- node upper cover plate; 32- node lower cover plate; 33- square steel pipe; 34-ear plate; 4-splice plate.

Detailed ways

In order to make the purpose, technical solutions and advantages of the utility model clearer, the technical solutions in the utility model are described clearly and completely below. Obviously, the described embodiments are some embodiments of the utility model, rather than all implementations example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

The assembly of the prefabricated assembled modular frame node of the present invention is shown in Fig. 1 . The node is mainly composed of prefabricated H-shaped steel concrete column 1, H-shaped steel beam 2, and node module 3, which are connected by welding and bolts. The prefabricated H-shaped steel concrete column 1 is respectively connected to the top of node module 3 and / or the bottom to realize the connection of the column, and the H-shaped steel beam 2 is connected to the side of the node module 3 in the horizontal direction by bolts and welding to realize the connection of the horizontal beam column; The round hole is finally formed by pouring concrete in the square steel pipe of the node module. There is no steel connection in the node area, and no post-cast concrete is performed outside the node.

As shown in Figure 2, the node module is composed of a node upper cover plate 31, a node lower cover plate 32, a square steel pipe 33 and an ear plate 34, and the node module 3 includes a node upper cover plate 31, a node lower cover plate 32, a square steel pipe 33 and Ear plates 34, four ear plates 34 are vertically arranged and perpendicular to the four sides of the square steel pipe 33, connected to the front, rear, left, and right sides of the square steel pipe 33, after the four ear plates 34 are connected to the square steel pipe 33, the upper node cover plate 31 and the lower node The cover plate 32 is respectively connected to the top and bottom of the four ear plates 34 and the square steel pipe 33, bolt holes are provided on the ear plate 34 and the H-shaped steel beam 2, and the web plate of the H-shaped steel beam 2 is connected to the ear plate 34 through the splicing plate 4 , the flange plate of the H-shaped steel beam 2 is welded with the upper node cover plate 31 and the lower node cover plate 32 respectively, and the splicing plate 4 is connected with the H-shaped steel beam 2 and the ear plate 34 by bolts;

The H-shaped steel in the prefabricated H-shaped steel concrete column 1 is connected with the joint upper cover plate 31 and/or the joint lower cover plate 32 by bolts, and the four corners of the column end plate are reserved with steel bar holes, and the positions of the reserved steel bar holes correspond to the positions of the longitudinal bars of the steel cage , plug-weld the longitudinal reinforcement to the steel reinforcement hole reserved in the column end plate.

The nodes are prefabricated into one body before construction, and can be directly connected with prefabricated columns and steel beams by bolts and welding when they are assembled.

The assembly process of the prefabricated frame node is:

(1) Fix the prefabricated steel reinforced concrete lower column;

(2) Connect and install the node module and the lower column as one;

(3) Dry-type connection of the steel beam and the overhanging lug plate of the node module through high-strength bolts;

(4) Install the prefabricated steel reinforced concrete upper column.

The connection position of the modular node and the steel beam is flexible, so that the plastic hinge moves outward when the node is damaged, thereby protecting the node to a certain extent, and can effectively avoid complex cross construction in the core area of the node, difficult reinforcement binding and post-casting Concrete and formwork support and other issues have achieved the design goals of prefabricated assembly structures that are safe, reliable, efficient, cost-controllable, and environmentally friendly, laying the foundation for further research on modular new-type assembly SRC column-steel beam frame structures , so as to better promote the application of prefabricated structural systems in practical engineering.

The following describes the composition and splicing process of the prefabricated frame edge nodes. The assembly process of prefabricated nodes is roughly divided into the following steps:

In the first step, the various parts of the node module and their spliced integration are shown in Figure 2. The node module consists of three parts: the node cover plate, the lug plate and the square steel pipe.

There are 12 bolt holes in the joint cover plate connected with the square steel pipe, which correspond to the holes of the column end plate one by one. In addition, according to the position of the node and the number of connections with the beam, the trapezoidal part of the node cover plate is processed accordingly. Bolt holes are reserved at the end of the connection between the lug plate and the beam. The length of the lug plate and the number of bolt holes are made according to the number of columns and beams connected.

In the second step, the ear plates are first welded to the centerline positions of the four sides of the square steel pipe, and then the welded square steel pipes and ear plates are placed in the central area of the node cover plate as a whole. Finally, the upper and lower parts are respectively welded with the node cover plate to form a whole to form a node module.

In the third step, the H-shaped steel lower column is welded to the column end plate, bound with the steel cage to form a steel-steel skeleton skeleton, and finally concrete is poured to form a steel-reinforced concrete lower column (the upper column is the same as this). Then connect the assembled node module and the lower column with 12 high-strength bolts, as shown in Figure 4.

In the fourth step, 2 splicing plates, H-shaped steel beams, and 6 high-strength bolts used to connect the horizontal beam-column to the node module are shown in Figure 3. Among them, the splicing plate is used to connect the ear plate and the beam web in the node module, and is connected by high-strength bolts. H-shaped steel beam 2 flange plate and horizontal beam-column flange plate shall be connected by V-shaped groove and one-sided full-penetration weld of backing plate, as shown in Figure 3.

The fifth step is to connect the upper prefabricated column member and the module shown in Figure 3 through high-strength bolts to form a prefabricated modular frame node, as shown in Figure 3.

Another prefabricated modular frame node and its usage status are shown in Figures 5 and 6.

When the connection between the lug plate and the square steel pipe in the node module meets the seismic design requirements in terms of strength, stiffness and stability, open gaps on the four sides of the square steel pipe or change the original square steel pipe into four angle steels to form a square steel pipe shape. There is a 10mm gap between them to facilitate the insertion of the cross board; change the original ear plate to the cross board main board and the cross board ear plate. First weld the lug plate of the cross plate to the corresponding side of the main plate of the cross plate to form a cross plate, then insert the cross plate into the gap of the combined angle steel, and then form a whole with the welding gap.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present utility model, and are not intended to limit it; although the utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: It is still possible to modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit of the technical solutions of the various embodiments of the present invention. and range.

Claims (7)

1. A prefabricated assembly type modular frame node is characterized in that: comprise prefabricated H-shaped steel concrete column (1), H-shaped steel beam (2) and node module (3); The prefabricated H-shaped steel concrete column (1) is connected to the top and/or bottom of the node module (3) by bolts to realize the connection of the column, and the H-shaped steel beam (2) is connected to the side of the node module (3) in the horizontal direction by bolts and welding. The side realizes the connection of horizontal beams and columns; The node module (3) includes a node upper cover plate (31), a node lower cover plate (32), a square steel pipe (33) and an ear plate (34), and four ear plates (34) are vertically arranged and connected to the square steel pipe (33 ) four faces vertical, connected to the front, rear, left, and right sides of the square steel pipe (33), after the four lug plates (34) are connected to the square steel pipe (33), the node upper cover plate (31) and the node lower cover plate (32) are respectively connected to the Four ear plates (34) and the top and bottom of the square steel pipe (33), the center of the upper cover plate (31) of the node is provided with a round hole for pouring concrete into the square steel pipe (33), the ear plate (34) and the H-shaped steel Bolt holes are provided on the beam (2), the web of the H-shaped steel beam (2) is connected with the ear plate (34) through the splicing plate (4), and the flange plate of the H-shaped steel beam (2) is respectively connected with the upper cover plate of the node ( 31) is welded with the node lower cover plate (32), and the splicing plate (4) is connected with the H-shaped steel beam (2) and the lug plate (34) by bolts; The H-shaped steel in the prefabricated H-shaped steel concrete column (1) is connected with the node upper cover plate (31) and/or the node lower cover plate (32) through bolts. 2. The prefabricated assembled modular frame node according to claim 1, characterized in that: the prefabricated H-shaped steel concrete column (1) comprises H-shaped steel and a column end plate welded on the end of the H-shaped steel, and the column end plate Bolt holes are opened, the column end plate and the joint upper cover plate (31) and/or the joint lower cover plate (32) are connected by bolts, the four corners of the column end plate are reserved for reinforcement holes, and the positions of the reserved reinforcement holes and the longitudinal reinforcement positions of the reinforcement cage correspond. 3. The prefabricated modular frame node according to claim 2, characterized in that: the node upper cover plate (31) and/or the node lower cover plate (32) is connected to the web of the H-shaped steel beam (2) It is trapezoidal, and the upper edge of the trapezoid is welded with the web plate of the H-shaped steel beam (2). 4. The prefabricated modular frame node according to any one of claims 1-3, characterized in that four ear plates (34) are welded to the centerline positions of the four sides of the square steel pipe. 5. The prefabricated modular frame node according to claim 4, characterized in that: the four ear plates (34) are welded to the square steel pipe (33) and placed on the node upper cover plate (31) and the node lower cover plate (32) central area, node upper cover plate (31) and node lower cover plate (32) are welded on four ear plates (34) and square steel pipe (33) top and bottom respectively. 6. The prefabricated modular frame node according to claim 4, characterized in that: the flange plate of the H-shaped steel beam (2) and the flange plate of the horizontal beam column adopt a V-shaped groove and a backing plate for single-sided full penetration welding seam connection. 7. The prefabricated modular frame node according to claim 4, characterized in that: the four ear plates (34) are formed by connecting the main plate of the cross plate and the ear plate of the cross plate connected by vertical welding, and the cross plate welded by cross Main board and cross plate lug plate are plugged in the gap that square steel pipe (33) four sides offer, form integral body with square steel pipe (33).