CN204456651U - Connecting device for reinforced wood-concrete composite beam - Google Patents

Abstract

The utility model discloses a connection device for reinforcing wood-concrete composite beams, which comprises a concrete slab, a wooden beam and an outsourcing steel plate, the wooden beam is installed under the concrete slab, the outer periphery of the wooden beam is wrapped by an outsourcing steel plate, and the outsourcing steel plate is Two sides of the upper surface of the wooden beam are bent and protruded, and the protruding part is embedded in the interior of the concrete slab, and the wooden beam and the outsourcing steel plate are closely bonded, and the bonding method is: welding or welding between the protruding parts of the outsourcing steel plate The connection is by bolts, or the connection between the wooden beam and the outer steel plate is connected by glue or nails. Under the condition of constant bearing capacity, the utility model reduces the volume of the wooden beam and increases the connection function between the wooden beam and the concrete, thereby improving the integrity. The utility model can not only be used in the restoration and reinforcement of old wooden structures, but also can be widely used in new structures.

Description

A connection device for reinforced wood-concrete composite beams

technical field

The utility model relates to a connection structure in construction engineering, in particular to a connection device for reinforcing wood-concrete composite beams.

Background technique

Before the 20th century, the wood structure was the main structural form of traditional buildings in my country because of its convenient materials and low price. There are still a large number of wooden structures such as residential buildings, bridges, temples, towers, pavilions, government offices and archways. The absolute numbers are quite large. Some ancient buildings have gone through thousands of years of vicissitudes and have extremely high cultural relics, historical and artistic values. Therefore, it is of great significance to strengthen and repair damaged or endangered ancient buildings.

Since the 1980s, with the spread of ecological humanistic thoughts, people began to pay more attention to the ecological and sustainable development of buildings. As a low energy consumption and renewable natural building material for processing and manufacturing, wood has once again gained people's attention. Wood structure buildings have the advantages of fast construction, simple structure, energy saving and beautiful appearance, and superior earthquake resistance. All previous earthquake disaster surveys in the world have shown that most wooden structures can withstand the earthquake without causing collapse and serious casualties. Most of the existing wooden structures are reinforced with FRP materials, which are expensive; the reinforcement effects of coating with preservatives and painting are not ideal. The bolting and repairing of steel plates not only destroys the original structural beauty, but also increases the construction procedure and construction cost.

Wood-concrete composite structure is a new type of structure developed on the basis of wood structure and concrete structure, and wood-concrete composite beam is an important part of wood-concrete composite structure. Experimental studies have shown that when wooden beams and concrete slabs are connected together with reliable shear connectors, the flexural bearing capacity and flexural rigidity are greatly improved. In traditional wood-concrete structures, the concrete slabs are placed directly on the wooden beams, which leads to a decrease in the overall rigidity of the structure, poor seismic performance, and reduced bearing capacity.

At present, the wood-concrete composite structure is developing rapidly abroad. Not only the research content is very advanced and extensive, but also the research results are widely used in practical engineering. The shear connector used between the wooden beam and the concrete is a key component to make the wooden beam and the concrete form a whole, bear the shear force, and work together. Wood-concrete composite structures are getting more and more attention and application, but a lot of research is still focused on the joints that make the wood and concrete form a whole, and the wood itself is rarely considered.

It can be seen from the rationality of the section that the composite beam fully exerts the effect of the wooden beam and the concrete material, the wooden beam is under tension, and the concrete is under compression. Compared with reinforced concrete beams, wood-concrete composite beams can reduce self-weight, reduce earthquake action, facilitate construction, save scaffolding and formwork, and shorten construction period.

In recent years, there have been more and more studies on wood-related composite structures in China, but there are few studies on wood-concrete composite structures, let alone a large number of applications. The main reason for the analysis is insufficient domestic timber resources. As shown in Figures 1 and 2, the existing wood-concrete composite structural beams, including concrete slabs 1, wooden beams 2 and studs 6, mainly have the following problems.

1. The rigidity and strength are relatively small, the deformation is large, and the bearing capacity is small;

2. The horizontal shear resistance is low;

3. The integrity of the stud connection is not strong enough;

4. The relatively small span of wooden beams;

5. Larger volume;

6. The construction procedure is relatively cumbersome;

7. The waste of wood is serious.

In addition to the above deficiencies, wood-concrete composite beams also have relatively high requirements for wood, which limits the application of other wood properties and increases the difficulty of popularization accordingly.

Utility model content

The purpose of this utility model is to provide a connection device for reinforcing wood-concrete composite beams, which solves how to improve the bearing capacity.

Under the same conditions, the volume of the wooden beams becomes smaller and the connection between the wooden beams and the concrete is increased to improve the integrity.

The technical solution adopted by the utility model is: a connection device for reinforcing wood-concrete composite beams, including concrete slabs, wooden beams and outsourcing steel plates, the wooden beams are installed under the concrete slabs, and the outer periphery of the wooden beams is wrapped by outsourcing steel plates , the outsourcing steel plate has two sides bent and protruding from the upper surface of the wooden beam, and the protruding part is embedded in the concrete slab, and the wooden beam and the outsourcing steel plate are closely bonded. The bonding method is: the protruding part of the outsourcing steel plate Welded or connected by bolts, or connected by glue or nails between the wooden beam and the outer steel plate.

The utility model adopts a thin steel plate to wrap the wooden beam, and tightens it with bolts, so that the steel plate and the wooden beam are closely attached. Because the wooden beam is wrapped with a layer of steel plate, not only the overall rigidity and strength of the composite beam are improved, but also the protruding steel plate and the tightened bolt are also connected to the concrete, which plays the role of a double connector, between the wooden beam and the concrete The connection effect is stronger, and the integrity is greatly improved; at the same time, reprocessing procedures such as drilling and installing studs on wooden beams are omitted, reducing processing damage to wooden beams, which can also avoid damage to the original buildings in the restoration of ancient buildings. Secondary damage to the structure; for new structures, under the condition of constant bearing capacity, the wooden beams can be made smaller, saving a lot of wood, and the restrictions on the material properties of wood are reduced, and the range of applicable wood is expanded; the weight is relatively reduced , the basic cost can also be relatively reduced, and the economic benefits are greater. The span can be increased accordingly, and the building space becomes larger. It is also very beneficial to the promotion of wood structure-related buildings.

Preferably, the outer surface of the outer cladding steel plate is provided with a protective layer.

Preferably, the outer surface of the outer cladding steel plate is textured or folded multiple times.

As a preference, a thin layer of wood material is wrapped on the outer surface of the outer cladding steel plate, which plays a decorative role in restoring the shape of the wooden structure.

Preferably, in order to show the original appearance of the wooden structure and reflect the beauty of the wooden structure, the outsourcing steel plate has holes or openings so that the internal wooden beams can be seen, which can also save steel.

Completing the fabrication of the steel-wood-concrete composite beam described in the present invention generally requires six processes or steps:

1. The production of wooden beams;

2. Production of outsourcing steel plates; (mainly prefabricated in the factory, not produced on site)

a. According to the size of the wooden beam, cut the steel thin plate, the length is the same as the length of the wooden beam, and the width is about the perimeter of the wooden beam cross section;

b. Punch holes on both sides along the length direction;

c. Press the steel sheet into shape;

3. Manufacture of steel-wood composite beams;

a. Put the wooden beams into the prepared outsourcing steel plate;

b. Tighten between the two holes with bolts.

4. Structural hoisting; hoisting the fabricated steel-wooden beams to the designated location;

5. Floor slab formwork support and steel bar binding;

6. Concrete pouring, maintenance and demolition of floor slabs;

Among them, the steel-wood composite beams are prefabricated in the factory; for the reinforcement construction, only the outsourcing steel plate parts are made and assembled at the construction site to reinforce the wooden beams.

The utility model can not only be used in the restoration and reinforcement of old wooden structures, but also can be widely used in new structures.

Beneficial effects: 1. The reinforced wood-concrete composite beam is mainly redesigned for ordinary wood-concrete composite beams, and the wooden beams are wrapped with steel sheets to improve the performance of the wooden beams in all aspects, including stiffness and strength, and Bending and shearing capacity, etc.

2. The connection device becomes assembled and is a part of the wrapped steel plate, with better integrity. In addition to the bolts, the protruding steel plate also functions as a continuous connector, so that the connection between the wooden beam and the concrete has a double role, with better integrity and increased rigidity again.

3. There is no fixed distance between the gaps of the steel plate fixed by bolts, and the construction requirements are met by tightening. That is, the steel plates can be fitted together and tightened.

4. The thickness of the steel plate should be convenient for construction, mainly based on the design.

5. Combined calculation design is adopted in the design, so as to reduce the cross-sectional size of wooden beams and save wood.

6. There is no need to drill screw-shear connectors on the wooden beams, reducing damage to the wooden beams, and the composite beams can be prefabricated in the factory, reducing construction difficulty and construction cost;

7. In the reinforcement of old buildings, the original wooden beams can be used without replacement; in new buildings, the wooden beams themselves play a role in reinforcement.

Description of drawings

Fig. 1 is the structural representation of existing wood-concrete composite beam;

Fig. 2 is existing wood-concrete composite beam structure sectional view;

Fig. 3 is the utility model wood-concrete composite beam structural representation;

Fig. 4 is the utility model wood-concrete composite beam structure sectional view;

Fig. 5 is a sectional view of bolt connection of the utility model outsourcing steel plate;

Fig. 6 is a schematic diagram of side punching of the outsourcing steel plate of the present invention;

Fig. 7 is a schematic diagram of the connection of the utility model outsourcing steel plate with glue;

Fig. 8 is a schematic diagram of the electric welding connection of the outsourcing steel plate of the present invention;

Fig. 9 is a schematic diagram of the utility model outsourcing steel plate beyond the wooden beam;

Fig. 10 is a folded schematic diagram of the utility model outsourcing steel plate;

Fig. 11 is a cross-sectional view of decorative wood used in the utility model's outsourcing steel plate;

Fig. 12 is a schematic diagram of opening holes in the outer cladding steel plate of the utility model.

Detailed ways

The utility model will be further described below in conjunction with the accompanying drawings and specific embodiments.

As shown in Figures 3 and 4: a connection device for reinforcing wood-concrete composite beams, including a concrete slab 1, a wooden beam 2 and an outsourcing steel plate 3, the wooden beam 2 is installed under the concrete slab 1, and the wooden beam 2 The outer periphery is wrapped by the outsourcing steel plate 3, and two sides of the outsourcing steel plate 3 are bent and protruded on the upper surface of the wooden beam 2, and the protruding part is embedded in the interior of the concrete slab 1, and the wooden beam 2 and the outsourcing steel plate 3 are tightly bonded;

As shown in FIG. 5 : the protruding parts of the outsourcing steel plates 3 are connected by bolts 4 .

As shown in Figure 6: instead of punching holes at both ends of the outsourcing steel plate 3, punch holes in the middle part of the outsourcing steel plate 3, and install nails to fix the steel plate on the belly of the wooden beam.

As shown in Figure 7, no holes are drilled on the outsourcing steel plate 3, no bolts are installed, the steel plate is directly fixed on the wooden beam with glue, and the outsourcing steel plate 3 and the wooden beam are connected together by glue.

As shown in Fig. 8, the steel sheets between the protruding parts of the outer cladding steel plate 3 are bonded together and welded firmly with a welding torch.

As shown in FIG. 9 , the outsourcing steel plate 3 does not necessarily adhere to the upper surface of the wooden beam, but can protrude appropriately.

As shown in FIG. 10 , the outer surface of the outer cladding steel plate 3 is folded multiple times.

As shown in FIG. 11 , a layer of thin wooden material 5 is wrapped on the outside of the outsourcing steel plate 3 , which plays a decorative role in restoring the shape of the wooden structure.

As shown in FIG. 12 , the outsourcing steel plate 3 has holes or openings so that the internal wooden beams can be seen, which can also play a role in saving steel.

It should be pointed out that those skilled in the art can make some improvements and modifications without departing from the principle of the utility model, and these improvements and modifications should also be regarded as the protection scope of the utility model. All components that are not specified in this embodiment can be realized by existing technologies.

Claims (5)

1. A connection device for reinforcing wood-concrete composite beams, characterized in that: it comprises a concrete slab, a wooden beam and an outsourcing steel plate, the wooden beam is installed below the concrete slab, and the periphery of the wooden beam is wrapped by an outsourcing steel plate, and the outsourcing steel plate On the upper surface of the wooden beam, two sides are bent and protruded, and the protruding part is embedded in the interior of the concrete slab, and the wooden beam and the outsourcing steel plate are closely bonded, and the bonding method is: welding between the protruding parts of the outsourcing steel plate Or connect by bolts, or connect by glue or install nails between the wooden beam and the outer steel plate. 2. A connection device for reinforcing wood-concrete composite beams according to claim 1, characterized in that: the outer surface of the outer cladding steel plate is provided with a protective layer. 3. A connection device for reinforcing wood-concrete composite beams according to claim 1, characterized in that: the outer surface of the outer cladding steel plate is textured or folded multiple times. 4. A connection device for reinforcing wood-concrete composite beams according to claim 1, characterized in that: the outer covering steel plate is covered with a thin layer of wood material. 5. A connection device for reinforced wood-concrete composite beams according to claim 1, characterized in that: the outer cladding steel plate has holes or openings.