Steel reinforced concrete shear wall connected through bolts

Abstract

The utility model discloses a steel reinforced concrete shear wall adopting bolt connection, which comprises a shear wall body, the shear wall body comprises a concrete wall body, a steel reinforcement framework and an embedded column, the steel reinforcement framework and the embedded column are poured in the concrete wall body, and the embedded column comprises a connecting piece I and profile steel I; the end walls of every two pieces of first profile steel arranged adjacently in the same embedded column are tightly attached, and every two pieces of first profile steel arranged adjacently in the same embedded column are connected with the same first connecting piece in a bolt connection mode. For connection of the first section steel, a bolt connection mode is adopted to replace welding, the situation that the construction quality is affected by welding residual stress is avoided, namely, the structural strength and stability of the embedded column are prevented from being affected, and meanwhile energy consumption and carbon emission in the construction process are reduced; the first section steel and the second section steel are connected through bolts, professional welding equipment is not needed, the construction site can be simplified, and the construction period is shortened.

Description

Technical Field

[0001] This utility model relates to the field of building structures, and more specifically to a steel-concrete shear wall using bolted connections. Background Technology

[0002] In building construction, especially in the structural design of some high-rise and super high-rise buildings, due to the large axial force and shear force, ordinary reinforced concrete shear walls can no longer meet the design requirements. The current common practice is to set steel sections in the hidden columns or end columns of reinforced concrete shear walls to form steel-concrete shear walls.

[0003] Steel-concrete composite shear walls have the advantages of high load-bearing capacity and good ductility, but they also have some disadvantages. For example, the steel sections in the concealed column area of ​​traditional steel-concrete composite shear walls are mostly connected by welding. The welding process of steel sections is complex, requires professional workers and equipment, and has low construction efficiency. The heat-affected zone of welding is prone to residual stress, which reduces the durability of the structure. In particular, the welding performance of high-strength steel is poor, and the welding quality during on-site construction is difficult to guarantee. In addition, the welding process generates a large amount of carbon emissions, which does not meet the requirements of green and low-carbon development.

[0004] Therefore, how to provide a steel-concrete shear wall with bolted connections that can overcome the above problems is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] In view of this, the present invention provides a steel-concrete shear wall using bolted connections.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A steel-concrete shear wall using bolted connections, comprising:

[0008] The shear wall body includes a concrete wall, a steel reinforcement cage, and concealed columns. The steel reinforcement cage is cast into the concrete wall. The concealed columns are vertically embedded in the concrete wall. Multiple concealed columns are arranged sequentially along the length of the concrete wall. Each concealed column includes multiple connectors and multiple vertically arranged steel sections. The steel sections are arranged vertically along their length, and the center lines of the multiple steel sections are collinear. The end walls of two adjacent steel sections in the same concealed column are in close contact. Each two adjacent steel sections in the same concealed column are connected to the same connector by bolts.

[0009] As can be seen from the above technical solution, compared with the prior art, this utility model discloses a steel-concrete shear wall with bolted connection. The concealed column in this application includes a connector and a steel section. The end walls of two adjacent steel sections in the same concealed column are tightly attached, and two adjacent steel sections in the same concealed column are connected to the connector by bolts. Regarding the connection of the steel sections, this application uses bolted connection instead of welding to avoid the impact of welding residual stress on construction quality, that is, to avoid affecting the structural strength and stability of the concealed column, while reducing energy consumption and carbon emissions during construction. The bolted connection between steel sections does not require professional welding equipment, which can simplify the construction site and shorten the construction period.

[0010] Preferably, the reinforcing cage includes a reinforcing mesh, tie bars, and a reinforcing cage. Two reinforcing meshes are provided, with their mesh surfaces parallel to the surface of the concrete wall. Multiple tie bars are provided, evenly distributed between the two reinforcing meshes, with both ends connected to the two meshes respectively. The reinforcing cage is vertically arranged and connected to the reinforcing mesh, with the steel section and connector located inside the cage. The reinforcing cage can be reliably cast into the concrete wall. This type of reinforcing cage significantly improves the structural strength of the shear wall and allows for reliable embedding of concealed columns within the concrete wall.

[0011] Preferably, the ends of two adjacent steel sections arranged along the length of the concrete wall are vertically staggered. This design avoids stress concentration in the shear wall body.

[0012] Preferably, the steel section is an I-beam, and the ends of every two adjacent steel sections arranged in the same concealed column are aligned. This type of steel section has strong resistance to bending, torsion, and compression.

[0013] Preferably, the first connector is plate-shaped, with its plate surface tightly abutting the web surface of the first steel section. Connectors are arranged on both sides of the web of the first steel section. One end of a bolt passes through the web of the first steel section and two connectors before being screwed onto a nut. The flanges of every two adjacent first steel sections in the same concealed column can be fixed by welding. Every two adjacent first steel sections in the same concealed column can be reliably connected.

[0014] Preferably, the connecting component one includes two connecting plates, one connecting plate and two connecting plates. A web of a steel section is arranged between the two connecting plates in the same connecting component one. The surface of the connecting plate one is in close contact with the surface of the web of the steel section one. One end of a bolt passes through the web of the steel section one and the two connecting plates one before being screwed onto a nut. The two flanges of the steel section one are each in close contact with the surfaces of the two connecting plates two. One end of a bolt passes through the flange of the steel section one and one connecting plate two before being screwed onto a nut. Each pair of adjacent steel sections one in the same concealed column can be reliably connected.

[0015] Preferably, the structure also includes reinforcing columns, which are vertically embedded in the concrete wall. Multiple reinforcing columns are arranged between every two adjacent concealed columns along the length of the concrete wall, and these columns are equidistantly spaced along the length of the concrete wall. The reinforcing columns are located between two steel reinforcement meshes. Each reinforcing column includes multiple connectors and multiple vertically arranged steel sections, which are arranged vertically along their lengths. The centerlines of the multiple steel sections are collinear, and the end walls of every two adjacent steel sections in the same reinforcing column are in close contact. Every two adjacent steel sections in the same reinforcing column are connected to the same connector by bolts. The reinforcing columns can significantly improve the vertical bearing capacity of the shear wall.

[0016] Preferably, the second type of steel section is an I-beam, and the ends of every two adjacent second types of steel section are aligned in the same reinforcing column; the second type of connector is plate-shaped, with its plate surface tightly attached to the web surface of the second type of steel section. Connectors are arranged on both sides of the web of the second type of steel section, and one end of the bolt passes through the web of the second type of steel section and the two second connectors before being screwed onto a nut. Every two adjacent second types of steel section in the same reinforcing column can be reliably connected.

[0017] Preferably, the ends of two adjacent steel sections arranged along the length of the concrete wall are vertically staggered. This design avoids stress concentration in the shear wall body.

[0018] Preferably, the reinforcing mesh includes vertical distribution bars and horizontal distribution bars. Multiple vertical distribution bars are arranged equidistantly along the length of the concrete wall, and multiple horizontal distribution bars are arranged equidistantly along the vertical direction. The vertical and horizontal distribution bars are tied together, and the ends of the tie bars are connected to both the vertical and horizontal distribution bars. The reinforcing cage includes stirrups and longitudinal bars. Multiple stirrups are arranged equidistantly vertically, and the longitudinal bars are located inside the stirrups and tied together. Multiple longitudinal bars are arranged along the length of the stirrups. The steel section and the connector are both located inside the stirrups, and the horizontal distribution bars are connected to the longitudinal bars. The reinforcing mesh structure is rationally designed and easy to construct. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of a steel-concrete shear wall with bolted connections, where there is only steel section one and no steel section two, and steel section one is not a narrow-flange steel section.

[0021] Figure 2 yes Figure 1 A magnified view of a section at point A in the middle;

[0022] Figure 3 yes Figure 1 A structural diagram of the steel reinforcement skeleton inside a shear wall of this type;

[0023] Figure 4 This is a partial axonometric drawing of a shear wall with reinforced columns and steel sections that are not narrow-flange steel sections;

[0024] Figure 5 This is a partial axonometric drawing of a shear wall with reinforced columns and narrow-flange steel sections.

[0025] In the diagram:

[0026] 1 is concrete wall, 2 is vertical distribution reinforcement, 3 is horizontal distribution reinforcement, 4 is tie bar, 5 is stirrup, 6 is longitudinal reinforcement, 7 is connector one, 8 is connector plate one, 9 is connector plate two, 10 is steel section one, 11 is connector two, 12 is steel section two. Detailed Implementation

[0027] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0028] This utility model discloses a steel-concrete shear wall using bolted connections. The concealed column in this application includes a connector 7 and steel sections 10. The end walls of every two adjacent steel sections 10 in the same concealed column are tightly abutted, and every two adjacent steel sections 10 in the same concealed column are connected to the connector 7 by bolts. Regarding the connection of the steel sections 10, this application uses bolted connections instead of welding to avoid the impact of residual welding stress on construction quality, that is, to avoid affecting the structural strength and stability of the concealed column, while reducing energy consumption and carbon emissions during construction. The bolted connection between steel sections 10 does not require professional welding equipment, which can simplify the construction site and shorten the construction period.

[0029] Both connector 7 and bolts are made of high-strength materials. While meeting the design requirements, the amount of material used is small and the structural weight is light, which makes the inertial force of the shear wall under seismic action small, further reducing the component cross-section and the amount of material used.

[0030] The simulation analysis results show that the seismic performance of the shear wall constructed using bolted connections is no less than that of the shear wall constructed using traditional welded connections.

[0031] By designing the steel mesh, tie rods 4, and steel cage, this shear wall has good structural strength;

[0032] By designing reinforced columns, which work in conjunction with concealed columns, the shear wall can withstand higher axial forces.

[0033] Example

[0034] See appendix Figure 1-5 This is a schematic diagram of the overall and partial structure of one embodiment of the present invention. Specifically, the present invention discloses a steel-concrete shear wall using bolted connections, the shear wall comprising:

[0035] The shear wall body includes a concrete wall 1, a steel reinforcement frame, and concealed columns. The concrete wall 1 is made of cast concrete and contains a steel reinforcement frame. The concealed columns are vertically embedded in the concrete wall 1, and multiple concealed columns are arranged sequentially along the length of the concrete wall 1. In this embodiment, there are two concealed columns, each located near one end of the concrete wall 1. Each concealed column includes multiple connectors 7 and multiple vertically arranged steel sections 10. The steel sections 10 are arranged vertically along their length, and their centerlines are collinear. The end walls of any two adjacent steel sections 10 in the same concealed column are in close contact. The ends of the steel sections 10 are planed flat to ensure that the plane defined by the end wall of the steel section 10 is perpendicular to the centerline along its length, so that the multiple steel sections 10 in the same concealed column can be arranged coaxially when arranged vertically. Any two adjacent steel sections 10 in the same concealed column are connected to the same connector 7 by bolts.

[0036] The reinforcing cage includes a reinforcing mesh, tie bars 4, and a reinforcing cage. There are two reinforcing meshes, with the mesh surface parallel to the surface of the concrete wall 1. There are multiple tie bars 4, which are evenly distributed between the two reinforcing meshes. The two ends of the tie bars 4 are connected to the two reinforcing meshes respectively. The main functions of the tie bars 4 are to fix the reinforcing mesh, improve the overall integrity of the reinforcing cage, and ensure the coordinated work of the reinforcing bars and concrete. The reinforcing cage is arranged vertically and connected to the reinforcing mesh. The steel section 10 and the connector 7 are both located inside the reinforcing cage.

[0037] The ends of two adjacent steel sections 10 arranged along the length of the concrete wall 1 are vertically staggered, that is, the end of one steel section 10 is located between the two ends of another steel section 10 that is adjacent to it along the length of the concrete wall 1, so as to avoid stress concentration.

[0038] Section steel 10 is an I-beam. The ends of two adjacent sections steel 10 in the same concealed column are aligned, that is, the outer contours of the cross sections of two adjacent sections steel 10 in the same concealed column are completely aligned.

[0039] There are two scenarios regarding connector 7:

[0040] The first scenario is when section steel 10 is a narrow-flange section steel, that is, when the flange width of section steel 10 does not meet the relevant structural requirements for bolted connection;

[0041] At this time, the connector 7 is plate-shaped. In this embodiment, the connector 7 is rectangular plate-shaped. The plate surface of the connector 7 is in close contact with the plate surface of the web of the steel section 10. There is a connector 7 on each side of the web of the steel section 10. The connector 7 is fixed to the web of the steel section 10 by bolt connection. Specifically, a through hole 1 is opened on the connector 7, and a through hole 2 is opened on the web of the steel section 10. One end of a single bolt passes through two through holes 1 and one through hole 2 and is screwed to a nut. The connector 7 and the bolt are designed to be connected with equal strength, and the bolt connection accounts for no less than 70%. The flanges of two adjacent steel sections 10 in the same concealed column can be fixed by welding. Of course, if the flanges of two adjacent steel sections 10 in the same concealed column are particularly narrow, they can be directly pressed together without connection.

[0042] The second scenario is when section steel 10 is not a narrow flange section steel, that is, when the flange width of section steel 10 meets the relevant structural requirements for bolted connection.

[0043] The connecting component 7 at this time includes two connecting plates 1 and 2, 9. In this embodiment, both connecting plates 1 and 2 are rectangular plates. The web of the steel section 10 is arranged between the two connecting plates 18 in the same connecting component 7. The surface of the connecting plate 18 is in close contact with the surface of the web of the steel section 10. The connecting plate 18 and the web of the steel section 10 are fixed by bolts. Specifically, a through hole 3 is opened on the connecting plate 18, and a through hole 4 is opened on the web of the steel section 10. One end of a single bolt passes through two through holes 3 and one through hole 4 and is screwed onto a nut. The two flanges of the steel section 10 Each of the two connecting plates 29 is in close contact with the surface of the steel section 10. The flange of the steel section 10 is fixed to the connecting plate 29 by bolts. Specifically, a through hole 5 is opened on the connecting plate 29, and a through hole 6 is opened on the flange of the steel section 10. One end of a single bolt passes through a through hole 5 and a through hole 6 and is screwed to a nut. When the cross-sectional area of ​​the flange in the total cross-sectional area of ​​the steel section 10 does not exceed 20% of the total area mentioned above, the connecting plate 29 and the bolts can be designed according to the equal strength connection design. Regarding the equal strength connection design, that is, when the steel section 10 is connected by bolts, the design value of the bearing capacity should not be less than the design value of the bearing capacity of the steel section 10.

[0044] When the shear wall needs to bear a large axial force, additional reinforcing columns can be added. The reinforcing columns are vertically embedded in the concrete wall 1. Multiple reinforcing columns are arranged between every two adjacent hidden columns along the length of the concrete wall 1. The multiple reinforcing columns are arranged equidistantly along the length of the concrete wall 1. The reinforcing columns are located between two steel meshes.

[0045] The reinforcing column includes multiple connectors 11 and multiple vertically arranged steel sections 12. The steel sections 12 are arranged vertically along their length, and the center lines of the multiple steel sections 12 are collinear along their length. The end walls of two adjacent steel sections 12 in the same reinforcing column are in close contact, and two adjacent steel sections 12 in the same reinforcing column are connected to the same connector 11 by bolts.

[0046] Section steel 212 is an I-beam and a narrow-flange section steel. The ends of two adjacent sections steel 212 in the same reinforcing column are aligned. The connection method of two adjacent sections steel 212 in the same reinforcing column is the same as the connection method of section steel 10 in the first case mentioned above. Connector 21 is plate-shaped. The plate surface of connector 21 is in close contact with the plate surface of the web of section steel 212. Connector 21 is arranged on both sides of the web of section steel 212. Connector 211 is fixed to the web of section steel 212 by bolt connection. Specifically, through hole seven is opened on connector 21, and through hole eight is opened on the web of section steel 212. One end of a single bolt passes through two through holes seven and one through hole eight and is screwed into a nut.

[0047] The ends of two adjacent steel profiles 12 arranged along the length of the concrete wall 1 are vertically staggered, that is, the end of one steel profile 12 is located between the two ends of another steel profile 12 that is adjacent to it along the length of the concrete wall 1, so as to avoid stress concentration.

[0048] The reinforcing mesh includes vertical distribution bars 2 and horizontal distribution bars 3. Multiple vertical distribution bars 2 are provided and are equidistantly arranged along the length of the concrete wall 1. Multiple horizontal distribution bars 3 are provided and are equidistantly arranged vertically. The vertical distribution bars 2 and horizontal distribution bars 3 are tied together. The ends of the tie bars 4 are tied together with both the vertical distribution bars 2 and the horizontal distribution bars 3. The reinforcing cage includes stirrups 5 and longitudinal bars 6. Multiple stirrups 5 are arranged vertically at equal intervals. The longitudinal bars 6 are located inside the stirrups 5 and are tied together. Multiple longitudinal bars 6 are arranged along the length of the stirrups 5. The steel section 10 and the connector 7 are both located inside the stirrups 5. The horizontal distribution bars 3 are connected to the longitudinal bars 6.

[0049] The steel used for section steel 10 and section steel 212 shall be of grade no lower than Q460, the concrete used in the construction of concrete wall 1 shall be of strength grade no lower than C60, and the bolts shall be high-strength bolts with a grade no lower than 10.9.

[0050] During the construction of this shear wall, the construction of the hidden columns and reinforcing columns is carried out first, followed by the construction of the steel reinforcement cage, and finally the formwork is erected and the concrete is poured, which is the construction of the concrete wall 1.

[0051] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0052] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A steel-concrete shear wall using bolted connections, characterized in that, include: The shear wall body includes a concrete wall, a steel reinforcement cage, and concealed columns. The steel reinforcement cage is cast into the concrete wall. The concealed columns are vertically embedded in the concrete wall. Multiple concealed columns are arranged sequentially along the length of the concrete wall. Each concealed column includes multiple connectors and multiple vertically arranged steel sections. The steel sections are arranged vertically along their length, and the center lines of the multiple steel sections are collinear. The end walls of two adjacent steel sections in the same concealed column are in close contact. Each two adjacent steel sections in the same concealed column are connected to the same connector by bolts.

2. A steel-concrete shear wall with bolted connection according to claim 1, characterized in that, The reinforcing cage includes a reinforcing mesh, tie bars, and a reinforcing cage. There are two reinforcing meshes, with the mesh surface parallel to the surface of the concrete wall. There are multiple tie bars, which are evenly distributed between the two reinforcing meshes, and the two ends of the tie bars are connected to the two reinforcing meshes respectively. The reinforcing cage is arranged vertically and connected to the reinforcing mesh. The steel section and the connector are both located inside the reinforcing cage.

3. A steel-concrete shear wall with bolted connection according to claim 1, characterized in that, The ends of two adjacent steel sections arranged along the length of the concrete wall are vertically staggered.

4. A steel-concrete shear wall with bolted connection according to claim 1, characterized in that, Section 1 is an I-beam, and the ends of every two adjacent sections 1 arranged in the same concealed column are aligned.

5. A steel-concrete shear wall with bolted connection according to claim 4, characterized in that, The first connector is plate-shaped, and the plate surface of the first connector is in close contact with the plate surface of the web of the first steel section. The first connectors are arranged on both sides of the web of the first steel section. One end of the bolt passes through the web of the first steel section and the two first connectors and is screwed into the nut. The flanges of two adjacent first steel sections in the same concealed column can be fixed by welding.

6. A steel-concrete shear wall with bolted connection according to claim 4, characterized in that, The connector includes two connecting plates, a first connecting plate and a second connecting plate. The web of a steel section is arranged between the two first connecting plates in the same connector. The surface of the first connecting plate is in close contact with the surface of the web of the steel section. One end of the bolt passes through the web of the steel section and the two first connecting plates and is screwed into a nut. The two flanges of the steel section are each in close contact with the surfaces of the two second connecting plates. One end of the bolt passes through the flange of the steel section and a second connecting plate and is screwed into a nut.

7. A steel-concrete shear wall with bolted connection according to claim 2, characterized in that, It also includes reinforcing columns, which are vertically embedded in the concrete wall. Multiple reinforcing columns are arranged between every two adjacent concealed columns along the length of the concrete wall. The multiple reinforcing columns are arranged equidistantly along the length of the concrete wall and are located between two steel meshes. The reinforcing column includes multiple connectors and multiple vertically arranged steel sections. The steel sections are arranged vertically along their length, and the center lines of the multiple steel sections are collinear. The end walls of every two adjacent steel sections in the same reinforcing column are in close contact. Every two adjacent steel sections in the same reinforcing column are connected to the same connector by bolts.

8. A steel-concrete shear wall with bolted connection according to claim 7, characterized in that, Section 2 is an I-beam, and the ends of two adjacent sections 2 in the same reinforced column are aligned; the connector 2 is plate-shaped, and the plate surface of the connector 2 is in close contact with the plate surface of the web of section 2. Connectors 2 are arranged on both sides of the web of section 2, and one end of the bolt is screwed into the nut after passing through the web of section 2 and the two connectors 2.

9. A steel-concrete shear wall with bolted connection according to claim 7, characterized in that, The ends of two adjacent steel sections arranged along the length of the concrete wall are vertically staggered.

10. A steel-concrete shear wall with bolted connection according to claim 7, characterized in that, The reinforcing mesh includes vertical distribution bars and horizontal distribution bars. Multiple vertical distribution bars are provided and are equidistantly arranged along the length of the concrete wall. Multiple horizontal distribution bars are provided and are equidistantly arranged vertically. The vertical and horizontal distribution bars are tied together. The ends of the tie bars are connected to both the vertical and horizontal distribution bars. The reinforcing cage includes stirrups and longitudinal bars. Multiple stirrups are arranged vertically at equal intervals. The longitudinal bars are located inside the stirrups and are tied together. Multiple longitudinal bars are arranged along the length of the stirrups. The steel section and the connector are both located inside the stirrups. The horizontal distribution bars are connected to the longitudinal bars.

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