CN206360399U - The existing reinforced concrete coupling beam bracing means of one species " doubly-linked beam " - Google Patents

Abstract

An existing reinforced concrete connecting beam reinforcement device of the type "double connecting beam". It includes shear steel energy dissipators, I-beams, buckling restraint supports, outsourcing steel plates, gusset plates, high-strength bolts and stiffeners; The device adopts the I-shaped steel beam connected to the concrete column as the internal force transmission beam. The upper part of the I-shaped steel beam is connected with the existing reinforced concrete connecting beam through the shear plate energy dissipator, and the lower part is hinged with the anti-buckling restraint support. The equivalent stiffness of the concrete coupling beam remains almost unchanged, which is very beneficial for earthquake resistance. Under the action of an earthquake, no additional internal force will be generated without an increase in additional stiffness. The high ductility and energy dissipation capacity greatly improves the safety of the building, and is especially suitable for the structural design of high-rise buildings in strong earthquakes and multi-seismic areas in my country.

Description

A kind of "double connecting beam" existing reinforced concrete connecting beam reinforcement device

technical field

The utility model belongs to the technical field of structural engineering, in particular to an existing reinforced concrete connecting beam reinforcing device of the type "double connecting beam".

Background technique

The failure of reinforced concrete coupling beams in the shear walls of high-rise buildings under horizontal loads can be divided into two types, namely brittle failure (shear failure) and ductile failure (bending failure). In the event of brittle failure, the coupling beam will lose its bearing capacity, which will greatly reduce the lateral stiffness of the structure, and may eventually lead to the collapse of the structure. Therefore, the design of the coupling beam requires adherence to the principle of "strong shear and weak bending". Coupling beams can dissipate energy in the event of ductile failure. However, under the repeated action of earthquakes, the cracks of the coupling beam will continue to develop and widen until the concrete is compressed and destroyed. At present, although the reinforcement devices such as diagonal braces and herringbone braces used in high-rise building coupling beams can improve the stiffness and bearing capacity of coupling beams to a certain extent, it has been found through previous earthquake damage analysis and a large number of literature studies that in Under the repeated action of rare earthquakes, the ductility and energy dissipation capacity of the high-rise building coupling beams under the existing support form, especially the frame core tube coupling beams, are limited, and their ductility and energy dissipation reserve capacity still need to be further improved; the existing existing steel bars Common reinforcement methods for concrete coupling beams include enlarging section method, pasting FRP or steel plate method, and bolt-fixed steel plate method. However, due to the different force mechanism, these reinforcement methods suitable for ordinary beams are not suitable for coupling beams. If the FRP or steel plate method is applied to the coupling beam, the FRP or steel plate is prone to delamination or peeling under repeated lateral loads.

Contents of the invention

In order to solve the above problems, the purpose of this utility model is to provide a kind of "double connecting beam" existing reinforced concrete connecting beam reinforcement device.

In order to achieve the above purpose, the existing reinforced concrete connecting beam reinforcement device similar to "double connecting beam" provided by the utility model includes shear steel plate energy dissipator, I-shaped steel beam, buckling restraint support, outsourcing steel plate, gusset plate, high-strength Bolts and stiffeners; the middle part of the reinforced concrete connecting beam in the existing shear wall, the part of the reinforced concrete column on both sides below the reinforced concrete connecting beam and close to the reinforced concrete connecting beam, the next reinforced concrete connecting beam and the steel bar The connecting parts of the concrete columns are respectively covered with a circle of outsourcing steel plates; the I-shaped steel beams are horizontally arranged under the reinforced concrete connecting beams, and the two ends are respectively fixed on the outsourcing steel plates close to the reinforced concrete connecting beams by high-strength bolts 6; The energy device is set between the outsourcing steel plate on the reinforced concrete connecting beam and the I-beam, the upper end is connected to the outsourcing steel plate by high-strength bolts, and the lower end is connected to the I-beam by high-strength bolts 6; the middle part of the bottom surface of the I-beam Two gusset plates are installed using stiffeners, and a joint plate is installed on the inner side of the connection between the next reinforced concrete coupling beam and the reinforced concrete columns on both sides respectively using stiffeners; The upper end of the anti-buckling restraint brace is hinged on a gusset plate on the I-beam, and the lower end is hinged on the gusset plate at the connection between the next reinforced concrete coupling beam and the reinforced concrete column on the same side.

The outsourcing steel plate is anchored to the reinforced concrete connecting beam, the reinforced concrete column, and the joint between the reinforced concrete connecting beam and the reinforced concrete column in the form of a tension anchor bolt.

The included angle α between the anti-buckling constraint support and the horizontal plane is between 25° and 45°.

The existing reinforced concrete connecting beam reinforcement device similar to "double connecting beam" provided by the utility model adopts the I-shaped steel beam connected with the concrete column as the internal force transmission beam, and the upper part of the I-shaped steel beam is connected with the existing The reinforced concrete coupling beam is connected, and the lower part is hinged with the anti-buckling restraint support. After strengthening, the equivalent stiffness of the reinforced concrete coupling beam can be guaranteed to remain almost unchanged, which is very beneficial for earthquake resistance. It will generate additional internal force, and at the same time, it can greatly improve the ductility and energy dissipation capacity of reinforced concrete coupling beams under drought and earthquakes, greatly improving the safety of buildings, especially suitable for high-rise building structures in strong earthquakes and multiple earthquakes in my country design.

Description of drawings

Fig. 1 is the elevation view of the existing reinforced concrete connecting beam reinforcement device of the class "double connecting beam" provided by the present invention.

Fig. 2 is a detailed view of the connection part of the shear steel plate energy dissipator in the existing reinforced concrete connecting beam reinforcement device of the class "double connecting beam" provided by the present invention;

Fig. 3 is a detailed view of the connection between the anti-buckling restraint support and the I-shaped steel beam in the existing reinforced concrete connecting beam reinforcement device similar to the "double connecting beam" provided by the present invention.

detailed description

The existing reinforced concrete connecting beam reinforcement device similar to the "double connecting beam" provided by the utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

As shown in Fig. 1-Fig. 3, the existing reinforced concrete connecting beam reinforcement device of the type "double connecting beam" provided by the utility model includes a shear steel plate energy dissipator 1, an I-shaped steel beam 2, a buckling restraint support 3, Outsourcing steel plates 4, gusset plates 5, high-strength bolts 6 and stiffeners 7; among them, the middle part of the reinforced concrete connecting beam 8 in the existing shear wall, and the reinforced concrete columns 9 on both sides are located under the reinforced concrete connecting beam 8 and close to the reinforced concrete The part of the connecting beam 8 and the connecting part of the next reinforced concrete connecting beam 8 and the reinforced concrete column 9 are respectively covered with a circle of outsourcing steel plates 4; The high-strength bolts 6 are fixed on the outsourcing steel plate 4 close to the reinforced concrete connecting beam 8; the shearing steel plate energy dissipator 1 is set between the outsourcing steel plate 4 on the reinforced concrete connecting beam 8 and the I-beam 2, and the upper end is made of high-strength bolts 6 is connected to the outsourcing steel plate 4, and the lower end is connected to the I-beam 2 with high-strength bolts 6; the middle part of the bottom surface of the I-beam 2 is installed with two gusset plates 5 by means of stiffeners 7, and the next reinforced concrete connecting beam 8 A gusset plate 5 is installed on the inner side of the connection with the reinforced concrete columns 9 on both sides, respectively, using stiffeners 7; two anti-buckling restraint supports 3 are arranged in a figure-eight shape, and the upper end of each buckling restraint restraint support 3 is hinged on the I-beam On a gusset plate 5 on the beam 2, the lower end is hinged on the gusset plate 5 at the joint between the next reinforced concrete connecting beam 8 and the reinforced concrete column 9 on the same side.

The outsourcing steel plate 4 is anchored to the reinforced concrete connecting beam 8 , the reinforced concrete column 9 , and the joint between the reinforced concrete connecting beam 8 and the reinforced concrete column 9 in the form of a tension anchor bolt.

The included angle α between the anti-buckling constraint support 3 and the horizontal plane is between 25° and 45°.

The setting method of the reinforced concrete connecting beam reinforcement device of the class "double connecting beam" provided by the utility model is described as follows:

a. First process the I-beam 2 in the factory, and process a round hole in the middle of the top surface of the I-beam 2;

b. Anchor an outsourcing steel plate 4 with a through hole corresponding to the high-strength bolt 6 on the upper end of the shearing steel plate energy dissipator 1 in the middle of the reinforced concrete connecting beam 8 in the form of a tension anchor bolt, and place other outsourcing steel plates 4 Anchored on the reinforced concrete column 9 on both sides, it is located below the reinforced concrete connecting beam 8 and close to the reinforced concrete connecting beam 8, and the next reinforced concrete connecting beam 8 is connected to the reinforced concrete column 9;

c. Fix a plurality of high-strength bolts 6 to the upper and lower ends of the shear steel plate energy dissipator 1, and use the high-strength bolts 6 at the upper end to fix them in the through holes of the outer steel plate 4 on the reinforced concrete connecting beam 8 by means of plug welding. This connects the shear steel plate energy dissipator 1 with the outsourcing steel plate 4 and the reinforced concrete connecting beam 8;

d. The two ends of the I-beam 2 are connected to the reinforced concrete columns 9 on both sides by high-strength bolts 6, which are located below the reinforced concrete connecting beam 8 and on the outsourcing steel plate 4 close to the reinforced concrete connecting beam 8;

e. Fix the multiple high-strength bolts 6 fixed on the lower end of the shear steel plate energy dissipator 1 to the round hole on the top surface of the I-beam 2 by means of plug welding, thereby connecting the shear steel plate energy dissipator 1 and The I-beams 2 are connected together;

f. Anchoring the gusset plate 5 to the middle of the bottom surface of the I-beam 2 and the inner side of the connection between the next reinforced concrete connecting beam 8 and the reinforced concrete column 9 with stiffeners 7;

g. Hinge the upper ends of the two anti-buckling restraint supports 3 to a gusset plate 5 on the I-beam 2 respectively, and respectively hinge the lower ends to connect the next reinforced concrete connecting beam 8 on the same side with the reinforced concrete column 9 On the gusset plate 5 at the position, the included angle α between the anti-buckling restraint support 3 and the horizontal plane is between 25° and 45°, thus completing the entire setting process.

Claims (3)

1. An existing reinforced concrete connecting beam reinforcement device of the type "double connecting beam", characterized in that: it includes a shear plate energy dissipator (1), an I-shaped steel beam (2), and a buckling restraint support (3) , outsourcing steel plates (4), gusset plates (5), high-strength bolts (6) and stiffeners (7); among them, there are reinforced concrete columns (9 ) is located below the reinforced concrete coupling beam (8) and close to the reinforced concrete coupling beam (8), and the next reinforced concrete coupling beam (8) and the reinforced concrete column (9) are respectively covered with a circle of outsourcing steel plates (4); The I-shaped steel beam (2) is horizontally arranged below the reinforced concrete connecting beam (8), and the two ends are respectively fixed on the outsourcing steel plate (4) close to the reinforced concrete connecting beam (8) by high-strength bolts (6) ; The shear plate energy dissipator (1) is located between the outsourcing steel plate (4) and the I-beam (2) on the reinforced concrete connecting beam (8), and the upper end is connected to the outsourcing steel plate (4) by high-strength bolts (6). ), the upper and lower ends are connected to the I-beam (2) by high-strength bolts (6); the middle part of the bottom surface of the I-beam (2) is equipped with two gusset plates (5) using stiffeners (7), and the next Stiffeners (7) are also used to install a gusset plate (5) on the inner side of the connection between the reinforced concrete coupling beam (8) and the reinforced concrete columns (9) on both sides; , the upper end of each buckling restraint brace (3) is hinged to a gusset plate (5) on the I-beam (2), and the lower end is hinged to the next reinforced concrete coupling beam (8) on the same side and the steel bar On the gusset plate (5) of the connection part of the concrete column (9). 2. According to claim 1, the existing reinforced concrete connecting beam reinforcement device of the class "double connecting beam", is characterized in that: the said outsourcing steel plate (4) is anchored to the reinforced concrete connecting beam in the form of tension anchor bolts (8), reinforced concrete columns (9), reinforced concrete connecting beams (8) and the connecting parts of reinforced concrete columns (9). 3. According to claim 1, the existing reinforced concrete connecting beam reinforcement device similar to "double connecting beams" is characterized in that: the included angle α between the buckling restraint support (3) and the horizontal plane is in the range of 25°～ between 45°.