CN108412036A - Assembled H profile steel column-isolated footing-concrete collar tie beam cross connecting node - Google Patents

Abstract

The invention belongs to the technical field of fabricating structural nodes in building structure engineering, and in particular relates to an assembled H-shaped steel column-independent foundation-concrete ring beam cross-shaped connection node. In the present invention, the components are prefabricated in the factory and assembled on site, wherein the H-shaped steel column is connected with the concrete independent foundation by bolts, and the concrete ring beams are respectively lapped on the four sides of the independent foundation to form a cross-shaped connection node. Binding and fixing, a reinforcement cage is formed in the cross-shaped connection node area, and the cross-shaped connection node is poured on the construction site. Integrity, reducing the impact of uneven foundation settlement on the structure, while effectively protecting the column foot, avoiding steel corrosion at the column foot, and improving the reliability of the bottom structure of the house. Industrialization development of village and town housing.

Description

Prefabricated H-shaped steel column-independent foundation-concrete ring beam cross connection node

Technical field:

The invention belongs to the technical field of fabrication of assembled structural nodes in building structure engineering, in particular to an assembled H-shaped steel column-independent foundation-concrete ring beam cross-shaped connection node and a method thereof.

Background technique:

In recent years, prefabricated light steel structure residences have developed rapidly. Compared with traditional residential structures, prefabricated light steel structure residences have the following advantages: 1) Light steel structure residences have larger bays and most of the walls are non-load-bearing walls , flexible space layout and high degree of integration. 2) The light weight makes the prefabricated light-steel structure house less seismic in an earthquake, and can give full play to the characteristics of high strength, good ductility, and strong plastic deformation capacity of steel, which improves the seismic performance and safety reliability of the house. The lighter quality can also reduce the basic cost and the cost of transportation and installation. 3) Green, environmental protection, energy saving and sustainable development. Prefabricated steel structure houses will not produce a lot of waste to pollute the environment during the production and construction process. Instead, factory processing and on-site assembly will reduce energy consumption and reduce on-site workload and construction noise. 4) Prefabricated light-steel structure houses are characterized by factory prefabrication and on-site installation, mechanized production and installation, short construction period and high product quality.

At present, our country is in a period of vigorous development of new urbanization and new rural construction. With the vigorous advocacy of the country, the development of construction industrialization and housing industrialization (especially the prefabricated light steel structure housing system) is the key point for the construction industry to transform the traditional construction mode. The urgent need is to adapt to the urgent needs of the construction of rural houses in villages and towns with a large amount and a wide area in my country. The introduction of the light steel structure system into the industrialized field of low-rise residential buildings in villages and towns can make use of the superior mechanical properties of the light steel structure, which has very positive significance for improving the seismic performance of farm buildings.

The main load-bearing components of the prefabricated light steel structure residence are made of thin-walled steel pipes and light hot-rolled steel, and the frame columns of the light steel structure mostly use H-shaped steel columns. For prefabricated light steel structures, how to effectively anchor the prefabricated house and the bottom foundation is the key to effectively transferring loads between the prefabricated house and the foundation and exerting the structural bearing capacity. Therefore, how to do a good job of reliable anchoring between the H-shaped steel column, the foundation and the main structure, how to effectively protect the column foot, and avoid the corrosion of the steel at the column foot is the key to whether the H-shaped steel column can play well in the structure of low-rise farm buildings. key to performance.

Contents of the invention

The invention provides an assembled H-shaped steel column-independent foundation-concrete ring beam cross-shaped connection node and its method. In the invention, each structural member is prefabricated in the factory, assembled on the construction site, and the nodes are post-cast, and the cross-shaped lap joint is arranged. Beams, columns, and foundations are reliably anchored together. At the same time, the column feet are effectively protected and steel corrosion at the column feet is avoided. The structure is simple and the construction is convenient. It is suitable for widespread application in low-storey light steel structure houses in villages and towns, and promotes the industrialization of villages and towns. .

To achieve the above object, the present invention adopts the following technical solutions:

Prefabricated H-shaped steel column-independent foundation-concrete ring beam cross connection node, including H-shaped steel column (1), column foot end plate (2), concrete ring beam (3), ring beam longitudinal reinforcement (4), concrete independent Foundation (5), pre-embedded bolts (6) and cross-shaped connection nodes (7); H-shaped steel column (1) welded with column foot end plate (2) and concrete independent foundation (5) through pre-embedded bolts (6) connection, the concrete ring beam (3) is respectively lapped on the four sides of the concrete independent foundation (5) to form a cross-shaped connection node; the ring beam longitudinal reinforcement (4) is configured in the concrete ring beam (3), and the ring beam longitudinal reinforcement (4) From both sides of the H-shaped steel column (1), it extends into the area of the cross-shaped connection node (7), and the four sides are lapped between the ring beams on the concrete independent foundation (5), and the ring beam longitudinal bars (4) cross Bundle and fix the steel bars at each place to form a reinforcement cage in the node area, and use concrete or grout to complete the filling of the cross-shaped connection node (7) to form an assembled H-shaped steel column-independent foundation-concrete ring beam cross-shaped connection node.

The assembled H-shaped steel column-independent foundation-concrete ring beam cross connection node is characterized in that:

The H-shaped steel column (1) adopts H-shaped hot-rolled steel, and the height of the flange and the web is not less than 100mm.

The shape of the column foot end plate (2) is square or rectangular, the thickness is not less than 6mm, and it is welded to the bottom of the H-shaped steel column (1). Bolt holes are reserved on the column foot end plate (2), and the embedded bolts (7) on the concrete independent foundation (6) pass through the reserved bolt holes on the column foot end plate (2), and the H-shaped steel column (1) Reliably connected with concrete independent foundation (6).

The ring beam longitudinal reinforcement (4) is arranged in the concrete ring beam (3), and the concrete ring beam (3) is respectively overlapped on four sides of the concrete independent foundation (5) to form a cross-shaped connection node.

The ring beam longitudinal reinforcement (4) adopts spiral steel bars, the ring beam longitudinal reinforcement (4) is arranged along the ring beam full length and extends out of the end section of the ring beam, and the concrete ring beam (3) is lapped on the concrete independent foundation (5 ) after being installed, the outstretched ring beam longitudinal reinforcement (4) passes through both sides of the H-shaped steel column (1) and penetrates into the joint area. , the reinforcement does not expose the node area. The steel bars at the intersections of the ring beam longitudinal bars (4) of each ring beam are bound and fixed, and a steel bar cage is formed in the cross-shaped connection node (7) area. After the node area is filled, a reinforced node is formed.

Bolts (6) are pre-embedded on the top surface of the concrete independent foundation (5).

The concrete ring beam (3) and concrete independent foundation (5) can use recycled concrete according to actual engineering needs.

The pre-embedded bolts (6) are pre-embedded in the foundation when the independent concrete foundation (5) is manufactured, and exposed for a certain anchoring distance according to the actual project.

The cross-shaped connection node (7) is poured with building filling materials such as concrete or grouting material. The strength of the filling material is not lower than the concrete strength of the concrete ring beam (3) and the concrete independent foundation (5). The cross-shaped connection node (7) is cast-in-situ at the construction site, and the H-shaped steel column (1), the concrete ring beam (3), and the concrete independent foundation (5) are firmly poured together to make it a neat structure and increase the integrity of the structure. To reduce the impact of uneven settlement of the foundation on the structure. At the same time, the column foot is effectively protected to avoid corrosion of the column foot steel.

Compared with the prior art, the assembled H-shaped steel column-independent foundation-concrete ring beam cross connection node of the present invention has the following advantages:

(1) The present invention is a fabrication method for assembly-type component nodes. H-shaped steel columns, concrete independent foundations, and concrete ring beam components are all prefabricated in factories, and only the node areas are poured on site. The intensity of workers' work, reducing the amount of engineering labor, and shortening the construction time efficiently, is suitable for popularization and application in the structure of low-storey farm houses, and quickly promotes the renovation of farm houses in villages and towns with a large amount and a wide area.

(2) In the node area, the longitudinal reinforcement of the ring beam is extended, and the reinforcement cage is lapped at the cross-shaped connection node area, and the filling material is cast in place. The H-shaped steel column, the concrete independent foundation, and the concrete ring beam are poured into a whole to form a Strong nodes increase the integrity of the bottom structure and realize a strong bottom structure.

(3) The form of strong joints effectively ensures the reliable connection of the main stressed member column to the foundation, ensures the effective transfer of load from the column, ring beam to the foundation, and increases the bearing capacity of the structure.

(4) Strong bottom structure, which enhances the overall rigidity of the building and the stability of the wall, reduces the impact of uneven foundation settlement on the structure, reduces the adverse effects of uneven foundation settlement or large vibration loads on the building and its The resulting wall cracks. In anti-seismic fortification areas, it can effectively improve the overall anti-seismic capacity of low-storey farm house structures in villages and towns.

(5) The strong bottom structure forms a complete and reliable force-bearing system with the H-shaped steel column light steel frame structure, and does not require the wall to bear the structural load as a force-bearing member, which is convenient for wall layout and wall panel selection. In the structure of low-storey rural houses in villages and towns, the walls can be directly built with blocks or installed with prefabricated wall panels on the ring beams.

(6) Fill concrete or grouting material to wrap the H-shaped steel column foot in the joint area to isolate the column foot from the outside world, protect the column foot, and avoid corrosion of the steel at the column foot. At the same time, filling materials such as concrete and grouting materials have a good fireproof effect, which can make up for the disadvantage of poor fireproof ability of steel.

Description of drawings:

Figure 1 is a partial detailed diagram of the fabrication process of the assembled H-shaped steel column-independent foundation-concrete ring beam cross-shaped joint; (a) ring beam lap joint (b) node pouring;

Fig. 2 is a schematic diagram of a prefabricated H-shaped steel column;

Fig. 3 is a schematic diagram of prefabricated concrete independent foundation;

Fig. 4 is the schematic diagram of prefabricated concrete ring beam;

Fig. 5 is an assembled top view of the assembled H-shaped steel column-independent foundation-concrete ring beam cross-shaped connection node;

Fig. 6 is an overall schematic diagram of an assembled H-shaped steel column-independent foundation-concrete ring beam cross-shaped connection node.

In the figure: 1-H-shaped steel column; 2-column foot end plate; 3-concrete ring beam; 4-ring beam longitudinal reinforcement; 5-concrete independent foundation; 6-embedded bolt; 7-cross connection node.

Detailed ways:

The assembled H-shaped steel column-independent foundation-concrete ring beam cross-shaped connection node in the invention, combined with accompanying drawings 1 to 6, illustrates the manufacturing method of the present invention as follows:

Step 1: Factory prefabricated H-shaped steel columns, concrete ring beams and independent concrete foundations. When making H-shaped steel columns, the end plates with bolt holes are welded at the bottom of the columns; when making concrete ring beams, the longitudinal reinforcement of the ring beams is made of spiral steel bars, which are arranged along the entire length of the ring beams and protrude outward from the end section of the ring beams. The elongation does not exceed the size of the cross-shaped connection node area; when the concrete independent foundation is made, the bolts are embedded on the top surface of the foundation.

The second step: on-site assembly. The pre-embedded bolts on the independent foundation pass through the reserved bolt holes on the end plate of the column foot, and the H-shaped steel column is connected with the concrete independent foundation bolts, and then the concrete ring beams are respectively lapped on the four sides of the concrete independent foundation to form a cross At the connection node, the steel bars at the intersection of the ring beam longitudinal reinforcement of each ring beam are bound and fixed, and a reinforcement cage is formed in the cross-shaped connection node area.

Step 3: Pour concrete or grouting material for the joint, use a vibrating tool to vibrate and compact the filling material, and smooth the surface for maintenance to form an assembled H-shaped steel column-independent foundation-concrete ring beam cross-shaped joint .

The above description is only a specific implementation case of the present invention, but the application of the present invention is not limited thereto. The sizes and materials of the components listed in the implementation of the present invention can be selected and used according to actual needs, and will not be listed one by one here.

Claims (9)

1. Prefabricated H-shaped steel column-independent foundation-concrete ring beam cross-shaped connection node, which is characterized by: including H-shaped steel column (1), column foot end plate (2), concrete ring beam (3), ring beam longitudinal reinforcement (4), concrete independent foundation (5), embedded bolts (6) and cross-shaped connection nodes (7); the H-shaped steel column (1) welded with the column foot end plate (2) and the concrete independent foundation (5) pass through The pre-embedded bolts (6) are connected, and the concrete ring beams (3) are respectively lapped on the four sides of the independent concrete foundation (5) to form cross-shaped connection nodes; the ring beam longitudinal reinforcement (4) is arranged in the concrete ring beam (3). ), the ring beam longitudinal reinforcement (4) extends from both sides of the H-shaped steel column (1) into the area of the cross-shaped connection node (7), and the four sides are lapped between the ring beams on the concrete independent foundation (5). Bind and fix the steel bars at the intersections of the longitudinal bars (4) to form a reinforcement cage in the node area, and use concrete or grout to complete the filling of the cross-shaped connection nodes (7) to form a prefabricated H-shaped steel column-independent foundation-concrete ring beam cross-shaped connection node. 2. The assembled H-shaped steel column-independent foundation-concrete ring beam cross connection node according to claim 1, characterized in that: the height of the flange and web of the H-shaped steel column (1) is not less than 100mm. 3. The assembled H-shaped steel column-independent foundation-concrete ring beam cross-shaped connection node according to claim 1, characterized in that: the thickness of the steel plate used for the column foot end plate (2) is not less than 6 mm, and the shape is square or rectangular, welded on the bottom of the H-shaped steel column (1); the column foot end plate (2) is processed with bolt holes of required apertures for connecting the embedded bolts (6). 4. The assembled H-shaped steel column-independent foundation-concrete ring beam cross connection node according to claim 1, characterized in that: the ring beam longitudinal reinforcement (4) adopts spiral reinforcement. 5. The prefabricated H-shaped steel column-independent foundation-concrete ring beam cross connection node according to claim 1, characterized in that: the ring beam longitudinal reinforcement (4) is arranged along the entire length of the ring beam and protrudes outward Ring beam end section; when the ring beam is assembled, the ring beam longitudinal reinforcement (4) extends into the cross-shaped connection node (7), but the length does not exceed the area size of the cross-shaped connection node (7). 6. The assembled H-shaped steel column-independent foundation-concrete ring beam cross connection node according to claim 1, characterized in that: the top surface of the concrete independent foundation (5) has embedded bolts (6). 7. The assembled H-shaped steel column-independent foundation-concrete ring beam cross connection node according to claim 1, characterized in that: the embedded bolts (6) are pre-embedded when making the concrete independent foundation (5) Inside the foundation, with exposed anchorage lengths. 8. The assembled H-shaped steel column-independent foundation-concrete ring beam cross-shaped connection node according to claim 1, characterized in that: the cross-shaped connection node (7) is filled with concrete or grouting material; the strength of the filling material Not less than the strength of concrete in the concrete ring beam (3) and concrete independent foundation (5). 9. The assembled H-shaped steel column-independent foundation-concrete ring beam cross-shaped connection node according to any one of claims 1-8, characterized in that the manufacturing method is as follows: Step 1: Prefabricate H-shaped steel columns, concrete ring beams and concrete independent foundations in the factory, process bolt holes on the end plates of the column feet, weld the end plates of the column feet to the bottom of the H-shaped steel columns, and pre-embed bolts on the top surface of the independent concrete foundation ; Step 2: On-site assembly of H-shaped steel columns, concrete ring beams, and concrete independent foundations. The embedded bolts on the independent foundations pass through the reserved bolt holes on the end plates of the columns, and the H-shaped steel columns are connected to the concrete independent foundation bolts, and then The concrete ring beams are lapped on the four sides of the independent concrete foundation respectively, and the steel bars at the intersections of the ring beam longitudinal bars of each ring beam are bound and fixed; Step 3: Pour concrete or grouting material for the joint, use a vibrating tool to vibrate and compact the filling material, and smooth the surface for maintenance to form an assembled H-shaped steel column-independent foundation-concrete ring beam cross-shaped joint .