CN111411688A - Reinforced concrete frame structure - Google Patents

Abstract

The invention relates to the technical field of building structures, and specifically discloses a reinforced concrete frame structure, which includes a cast-in-place floor slab and a frame beam. The four corners of the cast-in-place floor slab and the ends of the frame beam are provided with L-shaped partition grooves. The lengths of the two sides of the partition slot are respectively equal to 1/8 of the span of the cast-in-place floor slab in the corresponding direction. The partition slot is provided with a filling structure, and the filling structure includes a concrete layer, an extruded plastic board, a first benzene board, and a second benzene board. Boards and Posts. The invention aims to solve the problem that the cast-in-place floor slab will increase the flexural bearing capacity of the frame beam.

Description

Reinforced concrete frame structure

technical field

The invention relates to the technical field of building structures, and specifically discloses a reinforced concrete frame structure.

Background technique

The seismic performance of the reinforced concrete frame structure is closely related to the failure mechanism of the frame. The seismic design code proposes the seismic design principles of "strong column and weak beam", "strong shear and weak bending", and "strong joint and weak member". law to achieve. However, the actual earthquake damage and research have shown that the failure mechanism of "column hinge" of frame structure is relatively common. In fact, in the frame structure, the cast-in-place floor slab and the beam are cast together, participating in the stress of the beam, which improves the flexural rigidity and bearing capacity of the frame beam to a certain extent. The steel bars in the cast-in-place floor will increase the actual flexural bearing capacity of the frame beams by 20% to 30%, or even nearly double in some cases, which is not in line with the design principles of strong columns and weak beams and strong shear and weak bends.

SUMMARY OF THE INVENTION

The present invention aims to provide a reinforced concrete frame structure to solve the problem that the cast-in-place floor slab will increase the flexural bearing capacity of the frame beam.

In order to achieve the above object, the basic scheme of the present invention is:

The reinforced concrete frame structure includes a cast-in-place floor slab and a frame beam, and the four corners of the cast-in-place floor slab and the ends of the frame beam are provided with L-shaped partition grooves, and the lengths of the two sides of the partition groove are respectively equal to 1/8 of the span of the cast-in-place floor slab in the corresponding direction, and a filling structure is arranged in the partition groove.

Optionally, the top and bottom of the partition groove are both concrete layers of steel mesh structure.

Optionally, a plurality of upper and lower parallel slots are opened on the two inner walls of the partition slot close to the cast-in-place floor slab, and extruded plastic boards are inserted into the slots, and the upper and lower adjacent extruded plastic boards are filled with first and second slots. A benzene board, the extruded plastic board and the first benzene board are both located between two concrete layers.

Optionally, after the extruded board is inserted into the slot, a gap is left between the extruded board and the frame beam, and the gap is filled with a second benzene board vertically.

Optionally, one end of the extruded board close to the right-angle inflection point of the partition groove is vertically provided with a first vertical through groove, and one end of the first benzene plate close to the right-angle inflection point of the partition groove is vertically provided with a second vertical through groove. A through slot, the first vertical through slot is aligned up and down with the second vertical through slot, a square insert is inserted into the partition slot, and two insert blocks are arranged on the insert post, and the insert blocks can be inserted into the first vertical through slot. In the through groove and the second vertical through groove, the material of the plug is the same as that of the first benzene board.

Optionally, the diameter of the steel wire mesh in the concrete layer is 1.6mm-3mm, the distance between the steel wires is 200mm-400mm, and the distance between the ends of the steel wires extending into the cast-in-place floor is 20mm-60mm.

Optionally, the lower concrete layer and the cast-in-place floor slab are poured at the same time, and the upper concrete layer is poured after filling the extruded plastic board, the first benzene board, the second benzene board and the post.

The working principle and beneficial effects of this scheme are as follows:

1. The partition groove in this scheme separates the cast-in-place floor slab from the end of the frame beam, that is, part of the steel bars of the cast-in-place floor slab are not directly connected to the frame beam, which can reduce the flexural resistance of the cast-in-place floor slab to the frame beam. The contribution to ensure the design principle of strong shear and weak bend.

2. In order to ensure the bearing capacity of the partition slot, the partition slot is filled with extruded plastic board, first benzene board, second benzene board and plug posts, which are filled in the partition slot as a filling structure, which can improve the performance of the partition slot. carrying capacity. The structural strength of the extruded board is greater than that of the first benzene board, the second benzene board and the plug, which mainly acts as a force. Deformation during vibration to absorb vibration energy and improve shock resistance. The structure in the entire partition groove is equivalent to a shock absorber, which can not only bear the force but also reduce the vibration, and the effect is good.

3. In order to further ensure the bearing capacity of the partition trough and the aesthetics of the cast-in-place floor slab, concrete layers are provided at the upper and lower ends of the partition trough in this scheme. At the same time, the concrete layer adopts a steel mesh structure, and the contribution of the steel mesh structure to the flexural performance of the frame beam is much lower than that of the reinforced structure, so the improvement of the flexural performance of the frame beam is very limited.

4. The extruded plastic board in this scheme is inserted into the inner wall of the partition groove, which is only in contact with the cast-in-place floor slab, and its function is to improve the bearing capacity of the partition groove, and there is a second benzene board between the extruded plastic board and the frame beam. With vertical filling, the extruded board is only in contact with the second benzene board but has no physical connection, so the extruded board will not improve the bending resistance of the frame beam. In the same way, the second benzene plate is arranged vertically and is not physically connected to the frame beam, so it will not improve the bending resistance of the frame beam, which can ensure the design principle of strong shearing and weak bending. At the same time, in this solution, a first benzene board is filled between the upper and lower extruded plastic boards, and the weight of the first benzene board is light, which can effectively reduce the mass of the entire filling structure.

Description of drawings

Fig. 1 is the structural representation of embodiment;

Figure 2 is a schematic structural diagram of the connection between one of the corners of the cast-in-place floor slab and the frame beam.

FIG. 3 is a schematic diagram of the structure of the partition groove.

Detailed ways

The following is further described in detail by specific embodiments:

The reference numerals in the accompanying drawings include: frame beam 1, cast-in-place floor slab 2, partition groove 3, extruded plastic board 4, second benzene board 5, plug column 6, plug block 7, steel wire 8, slot 9, No. A benzene board 10 , a concrete layer 11 , a first vertical through slot 12 , and a second vertical through slot 13 .

This embodiment is shown in Figures 1-3:

Reinforced concrete frame structure, including cast-in-place floor slab 2 and frame beam 1. The four corners of the cast-in-place floor 2 and the end of the frame beam 1 are provided with an L-shaped partition groove 3, and the lengths of the two sides of the partition groove 3 are respectively equal to 1/8 of the span of the cast-in-place floor 2 in the corresponding direction. The groove 3 is provided with a filling structure.

The filling structure includes a concrete layer 11 , an extruded plastic board 4 , a first benzene board 10 , a second benzene board 5 and a post 6 .

The concrete layer 11 is located at the top and bottom of the partition groove 3, and the concrete layer 11 is a steel wire 8 mesh structure. The concrete layer 11 at the bottom and the cast-in-place floor slab 2 are cast and formed at the same time. In the concrete layer 11 at the top, the steel wire 8 is pre-buried in the cast-in-place floor slab 2. After the filling structure is completely filled, the steel wire 8 is bound again, concrete is poured, and finally The top of the partition groove 3 forms a concrete layer 11

The two inner walls of the partition slot 3 close to the cast-in-place floor slab 2 are provided with a plurality of upper and lower parallel slots 9. One end of the extruded plastic plate 4 facing the slot 9 is integrally formed with a plug-in board, which can be inserted into the slot 9. . The first benzene board 10 is filled between the two extruded plastic boards 4 adjacent up and down, and the extruded plastic board 4 and the first benzene board 10 are both located between the two concrete layers 11 .

After the extrusion board 4 is inserted into the slot 9 and the first benzene board 10 is filled, the extruded board 4 and the first benzene board 10 do not completely fill the partition slot 3, and there is a gap between the two and the frame beam 1. The second benzene plate 5 is filled vertically in the gap. The width of the gap is equal to the depth of the slot 9 and is also equal to the thickness of the second benzene plate 5 .

A first vertical through groove 12 is vertically provided on the end of the extrusion board 4 near the right-angle inflection point of the partition groove 3, and a second vertical through groove 13 is vertically disposed on the end of the first benzene board 10 near the right-angle inflection point of the partition groove 3. , the first vertical through-slot 12 is vertically aligned with the second vertical through-slot 13 . A square insert 6 is inserted into the partition slot 3, and two insert blocks 7 are integrally formed on the insert 6. The insert blocks 7 can be inserted into the first vertical through-slot 12 and the second vertical through-slot 13. The material of the column 6 is the same as that of the first benzene plate 10 .

The specific implementation process is as follows:

Before pouring the cast-in-place floor slab 2, reserve the space for the partition groove 3. At the same time, the inner wall of the partition groove 3 also needs to reserve the space for the slot 9. The top of the inner wall of the partition groove 3 is pre-embedded with steel wires 8, and the distance between the steel wires 8 is extended. is 60mm. After the pouring is completed, the bottom extruded plastic board 4 is installed, and then a layer of the first benzene board 10 is filled, and then the extruded plastic board 4 is installed upward. After the extrusion board 4 and the first benzene board 10 are both installed, the second benzene board 5 is inserted vertically. Then, align the inserting block 7 of the inserting post 6 with the first vertical through-slot 12 and the second vertical through-slot 13 , and insert the inserting post 6 into the partition slot 3 . Finally, a new steel wire 8 is tied on the steel wire 8 and concrete is poured.

The above descriptions are only embodiments of the present invention, and common knowledge such as well-known specific structures and characteristics in the solution are not described too much here. It should be pointed out that for those skilled in the art, some modifications and improvements can be made without departing from the structure of the present invention. These should also be regarded as the protection scope of the present invention, and these will not affect the implementation of the present invention. Effects and applicability of the present invention.

Claims (7)

1. reinforced concrete frame structure, it is characterized in that: comprise cast-in-place floor slab and frame beam, the four corners of described cast-in-place floor slab and the end connection of frame beam are provided with L-shaped partition grooves, and the two parts of the The lengths of the strip edges are respectively equal to 1/8 of the span of the cast-in-place floor slab in the corresponding direction, and a filling structure is arranged in the partition groove. 2 . The reinforced concrete frame structure according to claim 1 , wherein the top and bottom of the partition groove are both concrete layers of steel mesh structure. 3 . 3 . The reinforced concrete frame structure according to claim 2 , wherein the two inner walls of the partition groove close to the cast-in-place floor are provided with a plurality of upper and lower parallel slots, and extruded plastics are inserted into the slots. 4 . A first benzene board is filled between the upper and lower adjacent extruded plastic boards, and both the extruded plastic board and the first benzene board are located between two concrete layers. 4. The reinforced concrete frame structure according to claim 3, characterized in that: after the extruded plastic board is inserted into the slot, a gap is left between the extruded plastic board and the frame beam, and the gap is filled with a second benzene board. 5 . The reinforced concrete frame structure according to claim 4 , wherein the end of the extruded board close to the right-angle inflection point of the partition groove is vertically provided with a first vertical through groove, and the first benzene board is close to the reinforced concrete frame structure according to claim 4 . One end of the right-angle inflection point of the partition slot is vertically provided with a second vertical through slot, the first vertical through slot and the second vertical through slot are aligned up and down, a square insertion post is inserted into the partition slot, and the insertion post is provided with two An insert block, the insert block can be inserted into the first vertical through-slot and the second vertical through-slot, and the insert post is made of the same material as the first benzene board. 6. The reinforced concrete frame structure according to claim 5 is characterized in that: the diameter of the steel wire mesh wire in the concrete layer is 1.6mm-3mm, the distance between the steel wires is 200mm-400mm, and the distance between the ends of the steel wire extending into the cast-in-place floor slab is 20mm-60mm. 7. The reinforced concrete frame structure according to claim 6, characterized in that: the concrete layer below is poured simultaneously with the cast-in-place floor slab, and the concrete layer above is filled with extruded plastic board, the first benzene board, the second After the benzene board and the post are poured.

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