Steel reinforced concrete shear wall connected through bolts

Abstract

The invention 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 embedded columns, the steel reinforcement framework and the embedded columns are poured in the concrete wall body, each embedded column comprises a first connecting piece and first profile steel, the end walls of every two adjacent first profile steel in the same embedded column are tightly attached, and the first connecting pieces are connected with the first profile steel. 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] The invention relates to the field of building structures, and more particularly to a steel-concrete shear wall connected by bolts. Background Art

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

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

[0004] Therefore, how to provide a steel-concrete shear wall connected by bolts so as to overcome the above problems is an urgent problem to be solved by those skilled in the art. Summary of the invention

[0005] In view of this, the present invention provides a steel-concrete shear wall connected by bolts.

[0006] In order to achieve the above object, the present invention adopts the following technical solution:

[0007] A steel-concrete shear wall connected by bolts, comprising:

[0008] The shear wall body includes a concrete wall, a steel frame and hidden columns. The steel frame is cast in the concrete wall; the hidden columns are vertically buried in the concrete wall. Multiple hidden columns are arranged in sequence along the length direction of the concrete wall. The hidden columns include multiple connecting pieces and multiple vertically arranged steel sections. The length direction of the steel sections is vertically arranged. The center lines of the multiple steel sections in the length direction are collinear. The end walls of two adjacent steel sections in the same hidden column are tightly attached. The two adjacent steel sections in the same hidden column are connected to the same connecting piece by bolts.

[0009] It can be known from the above technical scheme that, compared with the prior art, the present invention discloses a steel-concrete shear wall connected by bolts. The hidden column in the present application includes a connecting piece and a steel piece. The end walls of each two adjacent steel pieces arranged in the same hidden column are tightly attached, and each two adjacent steel pieces arranged in the same hidden column are connected to the connecting piece by bolts. Regarding the connection of the steel piece, the present application adopts bolt connection instead of welding to avoid affecting the construction quality due to welding residual stress, that is, to avoid affecting the structural strength and stability of the hidden column, and at the same time reduce energy consumption and carbon emissions during construction. The bolt connection between the steel pieces does not require professional welding equipment, which can simplify the construction site and shorten the construction period.

[0010] Preferably, the steel skeleton includes a steel mesh, tie bars and a steel cage. Two steel meshes are provided, and the mesh surface of the steel meshes is parallel to the wall surface of the concrete wall. Multiple tie bars are provided, and multiple tie bars are evenly arranged between the two steel meshes, and the two ends of the tie bars are respectively connected to the two steel meshes. The steel cage is arranged vertically and connected to the steel mesh, and the steel section 1 and the connecting piece 1 are both located inside the steel cage. The steel skeleton can be reliably cast in the concrete wall. The above-mentioned steel skeleton can greatly improve the structural strength of the shear wall body on the one hand, and the hidden column can also be reliably pre-buried in the concrete wall.

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

[0012] Preferably, the steel section 1 is an I-beam, and the ends of two adjacent steel sections 1 in the same concealed column are aligned. This type of steel section 1 has relatively strong bending, torsion and compression resistance.

[0013] Preferably, the connecting piece 1 is plate-shaped, the plate surface of the connecting piece 1 is in close contact with the plate surface of the web of the steel section 1, the connecting piece 1 is arranged on both sides of the web of the steel section 1, one end of the bolt passes through the web of the steel section 1 and the two connecting pieces 1 and is screwed with the nut; the flanges of the two adjacent steel sections 1 in the same concealed column can be fixed by welding. The two adjacent steel sections 1 in the same concealed column can be reliably connected.

[0014] Preferably, the connector 1 includes two connecting plates 1 and 2, each of which is provided with two, a web of the profile steel 1 is arranged between the two connecting plates 1 in the same connector 1, the plate surface of the connecting plate 1 is in close contact with the plate surface of the web of the profile steel 1, and one end of the bolt is screwed with the nut after passing through the web of the profile steel 1 and the two connecting plates 1; the two flanges of the profile steel 1 are in close contact with the plate surfaces of the two connecting plates 2, and one end of the bolt is screwed with the nut after passing through the flanges of the profile steel 1 and one connecting plate 2. Each two adjacent profile steels 1 in the same concealed column can be reliably connected.

[0015] Preferably, it also includes a reinforcing column, which is vertically buried in the concrete wall. A plurality of reinforcing columns are arranged between every two adjacent concealed columns along the length direction of the concrete wall. The plurality of reinforcing columns are arranged in sequence and equidistantly along the length direction of the concrete wall. The reinforcing column is located between two steel meshes. The reinforcing column includes a plurality of connecting pieces 2 and a plurality of steel sections 2 arranged vertically in sequence. The steel sections 2 are arranged vertically in the length direction. The center lines of the plurality of steel sections 2 in the length direction are collinear. The end walls of the two adjacent steel sections 2 in the same reinforcing column are tightly attached. The two adjacent steel sections 2 in the same reinforcing column are connected to the same connecting piece 2 by bolt connection. The reinforcing column can greatly improve the vertical bearing capacity of the shear wall body.

[0016] Preferably, the second steel section is an I-beam, and the ends of two adjacent second steel sections in the same reinforcement column are aligned; the second connector is plate-shaped, and the plate surface of the second connector is in close contact with the plate surface of the web of the second steel section, and two connectors are arranged on both sides of the web of the second steel section, and one end of the bolt passes through the web of the second steel section and the two second connectors and is screwed with a nut. The two adjacent second steel sections in the same reinforcement column can be reliably connected.

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

[0018] Preferably, the steel mesh includes vertical distribution bars and horizontal distribution bars, the vertical distribution bars are provided in plurality and are arranged equidistantly along the length direction of the concrete wall, the horizontal distribution bars are provided in plurality and are arranged equidistantly along the vertical direction, the vertical distribution bars are tied and connected to the horizontal distribution bars, and the ends of the tension bars are connected to the vertical distribution bars and the horizontal distribution bars at the same time; the steel cage includes stirrups and longitudinal bars, the stirrups are arranged in plurality and equidistantly vertically, the longitudinal bars are located inside the stirrups and the two are tied and connected, the longitudinal bars are arranged in plurality along the length direction of the stirrups, the steel section 1 and the connector 1 are both located inside the stirrups, and the horizontal distribution bars are connected to the longitudinal bars. The steel mesh structure is reasonably designed and easy to construct. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0020] Figure 1 It is a schematic diagram of a steel-concrete shear wall connected by bolts when there is only steel section 1 but no steel section 2 and steel section 1 is not a narrow flange steel section;

[0021] Figure 2 yes Figure 1A partial enlarged view of the middle A;

[0022] Figure 3 yes Figure 1 Schematic diagram of the structure of the steel skeleton inside the shear wall;

[0023] Figure 4 It is a partial axonometric view of a shear wall with reinforcing columns and when the steel section 1 is not a narrow flange steel section;

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

[0025] In the figure:

[0026] 1 is the concrete wall, 2 is the vertical distribution reinforcement, 3 is the horizontal distribution reinforcement, 4 is the tension reinforcement, 5 is the stirrup, 6 is the longitudinal reinforcement, 7 is the connecting piece 1, 8 is the connecting plate 1, 9 is the connecting plate 2, 10 is the steel section 1, 11 is the connecting piece 2, and 12 is the steel section 2. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] The present invention discloses a steel-concrete shear wall connected by bolts. The concealed column in the present application includes a connecting piece 7 and a steel piece 10. The end walls of two adjacent steel pieces 10 in the same concealed column are tightly attached, and the two adjacent steel pieces 10 in the same concealed column are connected to the connecting piece 7 by bolts. Regarding the connection of the steel pieces 10, the present application adopts bolt connection instead of welding to avoid affecting the construction quality due to welding residual stress, that is, to avoid affecting the structural strength and stability of the concealed column, and at the same time reduce energy consumption and carbon emissions during construction. The bolt connection between the steel pieces 10 and the steel pieces 10 does not require professional welding equipment, which can simplify the construction site and shorten the construction period.

[0029] The connector 7 and the bolts are made of high-strength materials, which meet the design requirements while using less material and making the structure light, so that the inertia force of the shear wall under earthquake action is small, further reducing the component section and material consumption;

[0030] The simulation results show that the seismic performance of the shear wall made by bolt connection is not lower than that of the shear wall made by welding connection.

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

[0032] By designing reinforced columns, which cooperate with hidden columns, the shear wall can withstand higher axial forces.

[0033] Example

[0034] See attached Figure 1-5 The whole and part of the structure schematic diagram of an embodiment of the present invention, the present invention specifically discloses a steel concrete shear wall connected by bolts, the shear wall comprising:

[0035] The shear wall body comprises a concrete wall 1, a steel frame and a concealed column. The concrete wall 1 is cast with concrete, and a steel frame is cast inside the concrete wall 1. The concealed column is vertically buried in the concrete wall 1. A plurality of concealed columns are arranged in sequence along the length direction of the concrete wall 1. Two concealed columns are provided in this embodiment, and the two concealed columns are arranged close to both ends of the concrete wall 1 respectively. The concealed column comprises a plurality of connecting pieces 7 and a plurality of steel sections 10 arranged vertically in sequence. The length direction of the steel sections 10 is vertically arranged, and the center lines of the plurality of steel sections 10 in the length direction are collinear, and the end walls of each adjacent two steel sections 10 in the same concealed column are tightly attached. The end of the steel section 10 is planed to ensure that the plane defined by the end wall of the steel section 10 is perpendicular to the center line of the steel section 10 in the length direction, so that the plurality of steel sections 10 in the same concealed column can be coaxially arranged when they are arranged vertically in sequence. Each adjacent two steel sections 10 in the same concealed column are connected to the same connecting piece 7 by bolts.

[0036] The steel skeleton includes a steel mesh, tie bars 4 and a steel cage. There are two steel meshes, and the mesh surface of the steel mesh is parallel to the wall surface of the concrete wall 1; there are multiple tie bars 4, and multiple tie bars 4 are evenly arranged between the two steel meshes. The two ends of the tie bars 4 are respectively connected to the two steel meshes. The function of the tie bars 4 is mainly to fix the steel mesh, improve the integrity of the steel skeleton, and ensure the coordinated work of the steel bars and concrete; the steel cage is arranged vertically and connected to the steel mesh, and the steel section 10 and the connecting piece 7 are both located on the inner side of the steel cage.

[0037] The ends of two adjacent steel sections 10 arranged along the length direction 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 adjacent steel section 10 along the length direction of the concrete wall 1, avoiding stress concentration.

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

[0039] There are two situations regarding connector 7:

[0040] The first situation is when the steel section 10 is a narrow flange steel section, that is, the flange width of the steel section 10 does not meet the relevant structure of the bolt connection;

[0041] At this time, the connecting member 7 is in the shape of a plate. The connecting member 7 in the present embodiment is in the shape of a rectangular plate. The plate surface of the connecting member 7 is in close contact with the plate surface of the web of the steel section 10. A connecting member 7 is arranged on each side of the web of the steel section 10. The connecting member 7 and the web of the steel section 10 are fixed by bolt connection. Specifically, a through hole 1 is opened on the connecting member 7, and a through hole 2 is opened on the web of the steel section 10. One end of a single bolt is screwed with a nut after passing through two through holes 1 and one through hole 2. The connecting member 7 and the bolt are designed as equal-strength connections, and the proportion of bolt connections is not less than 70%; and the flanges of each two adjacent steel sections 10 in the same concealed column can be fixed by welding. Of course, if the flanges of each two adjacent steel sections 10 in the same concealed column are particularly narrow, they do not need to be connected and can be directly pressed against each other.

[0042] The second situation is when the steel section 10 is not a narrow flange steel section, that is, the flange width of the steel section 10 satisfies the relevant structure of the bolt connection;

[0043] At this time, the connecting member 7 includes two connecting plates 1 8 and two connecting plates 9, each of which is provided with two. The connecting plate 1 8 and the connecting plate 2 9 in this embodiment are both rectangular plates. The web of the steel section 10 is arranged between the two connecting plates 8 in the same connecting member 7. The plate surface of the connecting plate 8 is tightly attached to the plate surface of the web of the steel section 10. The connecting plate 8 and the web of the steel section 10 are fixed by bolt connection. Specifically, a through hole 3 is provided on the connecting plate 8, and a through hole 4 is provided on the web of the steel section 10. One end of a single bolt is screwed with a nut after passing through two through holes 3 and one through hole 4; the two flanges of the steel section 10 Each of them is tightly attached to the plate surface of the two connecting plates 29, and the flange of the steel section 10 is fixed to the connecting plate 29 by bolt connection. 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 is screwed with a nut after passing through a through hole 5 and a through hole 6. When the cross-sectional area of ​​the flange in the total area of ​​the cross-section of the steel section 10 does not exceed 20% of the above total area, the connecting plate 29 and the bolt can be designed as an equal strength connection. 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 reinforcement columns can be added. The reinforcement columns are vertically buried in the concrete wall 1. A plurality of reinforcement columns are arranged between every two adjacent concealed columns along the length direction of the concrete wall 1. The plurality of reinforcement columns are arranged in sequence and equidistantly along the length direction of the concrete wall 1. The reinforcement columns are located between two steel meshes.

[0045] The reinforcement column includes a plurality of connecting members 11 and a plurality of steel sections 12 arranged vertically in sequence. The steel sections 12 are arranged vertically in the length direction. The center lines of the plurality of steel sections 12 in the length direction are collinear. The end walls of two adjacent steel sections 12 in the same reinforcement column are closely attached. The two adjacent steel sections 12 in the same reinforcement column are connected to the same connecting member 11 by bolt connection.

[0046] The steel section 12 is an I-beam, and the steel section 12 is a narrow flange steel section. The ends of each two adjacent steel sections 12 in the same reinforcement column are aligned, and the connection method of the two adjacent steel sections 12 in the same reinforcement column is the same as the connection method of the steel section 10 in the first case mentioned above; the connecting member 11 is plate-shaped, and the plate surface of the connecting member 11 is tightly attached to the plate surface of the web of the steel section 12. Connecting members 11 are arranged on both sides of the web of the steel section 12. The connecting member 11 and the web of the steel section 12 are fixed by bolt connection. Specifically, a through hole 7 is opened on the connecting member 11, and a through hole 8 is opened on the web of the steel section 12. One end of a single bolt is screwed with a nut after passing through two through holes 7 and one through hole 8.

[0047] The ends of two adjacent steel sections 12 along the length direction of the concrete wall 1 are vertically staggered, that is, the end of one steel section 12 is located between the two ends of another adjacent steel section 12 along the length direction of the concrete wall 1, to avoid stress concentration.

[0048] The steel mesh includes vertical distribution bars 2 and horizontal distribution bars 3. There are multiple vertical distribution bars 2 and they are equidistantly arranged along the length direction of the concrete wall 1. There are multiple horizontal distribution bars 3 and they are equidistantly arranged vertically. The vertical distribution bars 2 are tied and connected with the horizontal distribution bars 3. The ends of the tension bars 4 are tied and connected with the vertical distribution bars 2 and the horizontal distribution bars 3 at the same time. The steel cage includes stirrups 5 and longitudinal bars 6. There are multiple stirrups 5 arranged vertically in sequence and equidistantly. The longitudinal bars 6 are located on the inner side of the stirrups 5 and the two are tied and connected. There are multiple longitudinal bars 6 arranged in sequence along the length direction of the stirrups 5. The steel section 10 and the connecting piece 7 are both located on the inner side of the stirrups 5. The horizontal distribution bars 3 are connected with the longitudinal bars 6.

[0049] The steel grade used for Section Steel 10 and Section Steel 212 is not lower than Q460, the strength grade of the concrete used in the construction of concrete wall 1 is not lower than C60, the bolts are high-strength bolts, and the grade of the bolts is not lower than 10.9.

[0050] When the shear wall is constructed, the hidden columns and the reinforced columns are constructed first, then the steel frame is constructed, and finally the mold is supported and concrete is poured, that is, the concrete wall 1 is constructed.

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

[0052] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one 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 will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A steel-concrete shear wall connected by bolts, characterized in that: include: The shear wall body includes a concrete wall, a steel frame and hidden columns. The steel frame is cast in the concrete wall; the hidden columns are vertically buried in the concrete wall. Multiple hidden columns are arranged in sequence along the length direction of the concrete wall. The hidden columns include multiple connecting pieces and multiple vertically arranged steel sections. The length direction of the steel sections is vertically arranged. The center lines of the multiple steel sections in the length direction are collinear. The end walls of two adjacent steel sections in the same hidden column are tightly attached. The two adjacent steel sections in the same hidden column are connected to the same connecting piece by bolts.

2. The steel-concrete shear wall connected by bolts according to claim 1, characterized in that: The steel skeleton includes a steel mesh, tie bars and a steel cage. There are two steel meshes, and the mesh surface of the steel mesh is parallel to the wall surface of the concrete wall. There are multiple tie bars, and the multiple tie bars are evenly arranged between the two steel meshes. The two ends of the tie bars are respectively connected to the two steel meshes. The steel cage is arranged vertically and connected to the steel mesh. The steel section 1 and the connecting piece 1 are both located on the inner side of the steel cage.

3. The steel-concrete shear wall connected by bolts according to claim 1, characterized in that: The ends of two adjacent steel sections arranged along the length direction of the concrete wall are vertically staggered.

4. The steel-concrete shear wall connected by bolts according to claim 1, characterized in that: The steel section 1 is an I-beam, and the ends of two adjacent steel sections 1 arranged in the same concealed column are aligned.

5. The steel-concrete shear wall connected by bolts according to claim 4, characterized in that: The connecting piece 1 is in the shape of a plate, and the plate surface of the connecting piece 1 is in close contact with the plate surface of the web of the steel section 1. Connecting pieces 1 are arranged on both sides of the web of the steel section 1. One end of the bolt is screwed with the nut after passing through the web of the steel section 1 and the two connecting pieces 1. The flanges of the two adjacent steel sections 1 in the same concealed column can be fixed by welding.

6. The steel-concrete shear wall connected by bolts according to claim 4, characterized in that: The connecting piece 1 includes two connecting plates 1 and 2, each of which is provided with two. The web of the steel section 1 is arranged between the two connecting plates 1 in the same connecting piece 1. The plate surface of the connecting plate 1 is tightly attached to the plate surface of the web of the steel section 1. One end of the bolt is screwed with the nut after passing through the web of the steel section 1 and the two connecting plates 1; the two flanges of the steel section 1 are tightly attached to the plate surfaces of the two connecting plates 2 respectively, and one end of the bolt is screwed with the nut after passing through the flange of the steel section 1 and one connecting plate 2.

7. The bolt-connected steel concrete shear wall according to claim 2, characterized in that: It also includes a reinforcing column, which is vertically buried in the concrete wall. A plurality of reinforcing columns are arranged between every two adjacent concealed columns along the length direction of the concrete wall. The plurality of reinforcing columns are arranged equidistantly in sequence along the length direction of the concrete wall. The reinforcing columns are located between two steel meshes. The reinforcing column includes a plurality of connecting pieces 2 and a plurality of steel sections 2 arranged vertically in sequence. The steel sections 2 are arranged vertically in the length direction. The center lines of the plurality of steel sections 2 in the length direction are collinear. The end walls of every two adjacent steel sections 2 in the same reinforcing column are tightly attached. Every two adjacent steel sections 2 in the same reinforcing column are connected to the same connecting piece 2 by bolts.

8. The steel-concrete shear wall connected by bolts according to claim 7, characterized in that: The steel section 2 is an I-beam, and the ends of each two adjacent steel sections 2 in the same reinforcement column are aligned; the connecting piece 2 is plate-shaped, and the plate surface of the connecting piece 2 is in close contact with the plate surface of the web of the steel section 2. Connecting pieces 2 are arranged on both sides of the web of the steel section 2, and one end of the bolt is screwed with the nut after passing through the web of the steel section 2 and the two connecting pieces 2.

9. The steel-concrete shear wall connected by bolts according to claim 7, characterized in that: The ends of two adjacent steel sections arranged along the length direction of the concrete wall are vertically staggered.

10. The steel-concrete shear wall connected by bolts according to claim 7, characterized in that: The steel mesh includes vertical distribution bars and horizontal distribution bars. There are multiple vertical distribution bars and they are evenly spaced along the length direction of the concrete wall. There are multiple horizontal distribution bars and they are evenly spaced vertically. The vertical distribution bars are tied and connected to the horizontal distribution bars. The ends of the tension bars are connected to the vertical distribution bars and the horizontal distribution bars at the same time. The steel cage includes stirrups and longitudinal bars. There are multiple stirrups and they are evenly spaced vertically. The longitudinal bars are located on the inner side of the stirrups and they are tied and connected. There are multiple longitudinal bars and they are arranged in sequence along the length direction of the stirrups. The steel section 1 and the connecting piece 1 are both located on the inner side of the stirrups. The horizontal distribution bars are connected to the longitudinal bars.

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