CN210122838U - An eccentric support structure for cross-span control and anti-buckling - Google Patents

Abstract

The utility model discloses a stride-over force-control buckling-restrained eccentric bracing structure, which comprises three main frame columns, wherein two main frame beams are arranged between two adjacent main frame columns; the structure has the characteristics of high safety, excellent anti-seismic performance, simple structure, small occupied space, no influence on door and window arrangement and low cost.

Description

An eccentric support structure for cross-span control and anti-buckling

technical field

The utility model belongs to the field of building structures, and relates to an eccentric support structure for spanning control force and preventing buckling.

Background technique

The lateral force-resistant structure plays a role in resisting horizontal loads such as wind load and earthquake load in the building structure, and is the key to ensuring the safety and reliability of the entire structure. At present, the lateral force-resistant structures used in multi-storey steel structures mainly include support structures and steel plate shear wall structures, which can be subdivided into central support, eccentric support, and buckling restraint according to different mechanical properties and structural forms. Bracing (anti-buckling bracing), non-stiffened steel plate wall, stiffened steel plate wall, slotted steel plate wall and anti-buckling steel plate wall, etc.

The buckling resistance of the central support is poor, especially under moderate and large earthquakes, elastic or elastic-plastic buckling will inevitably occur, leading to failure of the support, resulting in a decrease in structural stiffness and energy dissipation capacity, affecting structural safety. The traditional eccentric support dissipates energy by forming energy-dissipating connecting beams through the support offset. After the energy-dissipating beam section is greatly deformed, it provides movement space for the strut to alleviate the buckling problem of the strut, but the deformation of the energy-consuming beam section means that the floor slab is deformed. Damage will occur earlier, and in order to ensure that the energy-consuming beam section yields first, the remaining components often need to be designed to be too large in cross-section, or even too strong, which increases construction costs and has limited practical applications. Buckling restraint bracing is a kind of support that limits the buckling effect of the core material by covering the restraining material or member outside the supporting core material. However, this type of support generally has a large cross-section, takes up more building space, and has a more complex structure and high engineering cost, so it has greater limitations in practical engineering applications.

Steel plate shear wall (non-stiffened, stiffened, anti-buckling) provides stiffness to resist horizontal force through the tensile force field formed by the wall plate, but the tensile force field has a very unfavorable oblique effect on the side column of the steel plate wall, and because the wall plate has no compression resistance The overturning moment generated by the horizontal load is mainly resisted by the couple formed by the axial force of the frame column, which makes the internal force in the column extremely large, which can easily lead to the instability or damage of the frame column. Combined structural columns with better stability such as columns are used as edge restraint members, which also limits the application of steel plate shear walls in steel structures. In addition, the bending deformation of the frame beam under the action of the tensile force field formed by the upper and lower wall panels will be largely suppressed, similar to being "embedded", which makes the plastic development of the frame beam insufficient, and the frame column often precedes the frame beam. The formation of plastic hinges makes it difficult to realize the requirement of "strong columns and weak beams" in seismic design, which reduces the overall seismic performance of the structure. In addition, the wall panels of the steel plate shear wall need to be connected to the frame beams and columns by bolting or welding at the construction site. The workload is large and the connection quality is not easy to guarantee, which hinders the assembly application of the steel plate wall structure. Slotted steel plate shear wall panels have little effect on side columns, but they are rarely used in practice due to their weak stiffness and bearing capacity.

In addition to the above shortcomings, the current lateral force-resistant structures will also affect the realization of building functions. The arrangement of doors and windows for lighting, ventilation and meeting the access needs of people is the most basic functional requirement of a building, but whether it is a support or a steel plate shear wall structure, it usually needs to occupy the entire wall surface, which seriously affects the arrangement of door and window openings. This defect is particularly prominent in multi-high-rise steel structure residential buildings and prefabricated steel structure residential buildings. The existing lateral force-resistant structure, whether it is a support structure or a steel plate shear wall structure, usually occupies the entire wall space, making it difficult to open doors and windows on the wall where the lateral-force-resistant structure is arranged, resulting in a "black room" effect building use. This has a particularly prominent impact on multi-high-rise steel-structured residential buildings and prefabricated residential buildings. Residential buildings have small column spacing, variable apartment types, higher lighting and ventilation needs, and few walls that do not require doors or windows. It is difficult for some lateral force-resistant structures to meet the diverse needs of building layouts.

Utility model content

The purpose of the present utility model is to overcome the shortcomings of the above-mentioned prior art, and to provide a cross-span control force anti-buckling eccentric support structure, which has the advantages of high safety, excellent seismic performance, simple structure, small occupied space, and does not affect the arrangement of doors and windows. and low cost.

In order to achieve the above purpose, the cross-span control force anti-buckling eccentric support structure of the present invention comprises three parallel and sequentially distributed main frame columns, wherein two main frame beams are arranged between two adjacent main frame columns;

In the area surrounded by two adjacent main frame columns and the two main frame beams between them, there are inner frame columns, two main frame beams and two stay rods, wherein the two inner frame beams are arranged in parallel, and the two inner frame beams are arranged in parallel. One end of the inner frame beam is fixed to the inner main frame column, the other end of the upper inner frame beam is fixed to the upper end of the inner frame column, and the other end of the lower inner frame beam is fixed to the lower end of the inner frame column. One end of the strut is connected to the upper end of the inner frame column and the end of the upper inner frame beam, the other end of the first strut is fixed to the middle of the top main frame beam, and one end of the second strut is connected to the inner frame. The lower end of the column and the end of the lower inner frame beam are connected, and the other end of the second brace is fixed to the middle of the bottom main frame beam.

The inner main frame column, the inner frame beam and the inner frame column connected thereto form a rectangular inner frame, wherein a metal plate is fixed in the rectangular inner frame.

Between the main frame column in the middle and an outer main frame column, a door hole and a first window hole are arranged in the area enclosed by the outer main frame column, the two braces and the two main frame beams;

A second window hole is arranged in the area enclosed by the outer main frame column, the two braces and the two main frame beams between the middle main frame column and the other outer main frame column. The main frame beams are provided with strut nodes for fixing the struts.

The metal plate is fixed to the inner side of the rectangular inner frame.

The main frame beam is H-shaped steel beam or box-shaped steel beam;

The main frame column is an H-shaped steel column, a box-shaped steel column, a steel tube concrete column, a steel tube concrete column or a steel tube restrained steel concrete column.

The inner frame beam is H-shaped steel beam or box-shaped steel beam;

The inner frame column is an H-shaped steel column or a box-shaped steel column.

The struts are H-shaped steel struts or box-shaped steel struts.

The metal plate is a low yield point steel plate, a high-strength steel plate or a foamed steel plate.

The metal plate is a steel plate with stiffening ribs, a slotted steel plate or a holed steel plate.

The utility model has the following beneficial effects:

During the specific operation of the cross-span control force and anti-buckling eccentric support structure of the present invention, an energy dissipation control wall is formed by a rectangular inner frame and a metal plate. When the support structure is subjected to horizontal loads such as earthquake loads and wind loads, the support The rod converts the horizontal load into tension and compression, and acts on the rectangular inner frame. The metal plate, inner frame beam and inner frame column first yield to dissipate energy. When the horizontal load is larger, the main frame beam yields and further dissipates the earthquake. energy. It should be noted that, based on the concept of controlling force and preventing buckling, the present invention uses the energy-consuming force-controlling wall to control the maximum internal force of the strut, and provides sufficient deformation space for it, so as to realize the structure yielding under the action of a large earthquake without Buckling, the anti-buckling effect is good, and at the same time, it can greatly simplify the structure, reduce the space occupation and reduce the cost. In addition, after the strut achieves anti-buckling, it has a stable compressive ability and can participate in resisting the overturning caused by horizontal loads. It can reduce the force burden of the main frame column and prevent the main frame column from being damaged in advance, thereby improving the seismic capacity of the structure.

Description of drawings

Figure 1 is a schematic structural diagram of the utility model.

Among them, 1 is the main frame beam, 2 is the main frame column, 3 is the inner frame beam, 4 is the inner frame column, 5 is the metal plate, 6 is the strut, 7 is the strut node, 8 is the door hole, and 91 is the first The window hole, 92 is the second window hole.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is described in further detail:

Referring to FIG. 1, the cross-span control force anti-buckling eccentric support structure of the present invention includes three parallel and sequentially distributed main frame columns 2, wherein two main frame beams are arranged between two adjacent main frame columns 2 1; In the area enclosed by the two adjacent main frame columns 2 and the two main frame beams 1 therebetween, there are inner frame columns 4, two main frame beams 1 and two braces 6, wherein the two inner frame columns are The frame beams 3 are arranged in parallel, and one end of the two inner frame beams 3 is fixed on the inner main frame column 2, the other end of the upper inner frame beam 3 is fixed on the upper end of the inner frame column 4, and the lower inner frame beam 3 The other end of the first support rod 6 is connected to the upper end of the inner frame column 4 and the other end of the upper inner frame beam 3, and the other end of the first support rod 6 is fixed In the middle of the top main frame beam 1, one end of the second brace 6 is connected to the lower end of the inner frame column 4 and the other end of the lower inner frame beam 3, and the other end of the second brace 6 is fixed to the bottom main frame. The middle of the frame beam 1.

The main frame column 2 on the inner side and the inner frame beam 3 and the inner frame column 4 connected to it form a rectangular inner frame, wherein a metal plate 5 is fixed in the rectangular inner frame; The strut node 7.

Between the main frame column 2 in the middle and an outer main frame column 2, a door hole 8 and a first window hole are provided in the area enclosed by the outer main frame column 2, the two braces 6 and the two main frame beams 1 91; between the main frame column 2 in the middle and another outer main frame column 2, the outer main frame column 2, the two brace bars 6 and the two main frame beams 1 are provided with a second window hole in the area enclosed 92.

The metal plate 5 is fixed to the inner side of the rectangular inner frame by welding, bolt connection, bolt welding hybrid connection or rivet connection; the main frame beam 1 is an H-shaped steel beam or a box-shaped steel beam; the main frame column 2 is an H-shaped steel column, a box-shaped steel beam Column, steel tube concrete column, steel tube concrete column or steel tube restrained steel concrete column; inner frame beam 3 is H-shaped steel beam or box-shaped steel beam; inner frame column 4 is H-shaped steel column or box-shaped steel column; strut 6 is H-shaped steel A strut or box-shaped steel strut; the metal plate 5 is a low yield point steel plate, a high-strength steel plate or a foamed steel plate, or the metal plate 5 is a steel plate with a stiffener, a slotted steel plate or a holed steel plate.

In addition, the struts 6 are connected to the middle of the main frame beam 1, so that there is sufficient space in the main frame to arrange doors and windows, thereby greatly improving the flexibility of the lateral force-resistant structure arrangement in the building.

Claims (8)

1. A cross-span control force anti-buckling eccentric support structure, characterized in that it comprises three parallel and sequentially distributed main frame columns (2), wherein two adjacent main frame columns (2) are provided with two main frame beam (1); An inner frame column (4), two main frame beams (1) and two braces ( 6), wherein, two inner frame beams (3) are arranged in parallel, and one end of the two inner frame beams is fixed on the inner main frame column (2), and the other end of the upper inner frame beam (3) is fixed on The upper end of the inner frame column (4), the other end of the lower inner frame beam (3) is fixed to the lower end of the inner frame column (4), and one end of the first stay (6) is connected to the upper end of the inner frame column (4) and the end of the upper inner frame beam (3), the other end of the first brace (6) is fixed to the middle of the top main frame beam (1), and one end of the second brace (6) is connected to the inner The lower end of the frame column (4) and the end of the lower inner frame beam (3) are connected, and the other end of the second brace (6) is fixed to the middle of the bottom main frame beam (1). 2. The eccentric support structure for spanning control force and anti-buckling according to claim 1, wherein the main frame column (2) on the inner side is connected with the inner frame beam (3) and the inner frame column (4) to form a rectangular inner frame. A frame, wherein a metal plate (5) is fixed in the rectangular inner frame. 3. The eccentric support structure for spanning control force and anti-buckling according to claim 1, characterized in that, between the middle main frame column (2) and an outer main frame column (2), the outer main frame column (2) A door hole (8) and a first window hole (91) are arranged in the area enclosed by the two stay rods (6) and the two main frame beams (1); Between the main frame column (2) in the middle and another outer main frame column (2), the outer main frame column (2), two braces (6) and two main frame beams (1) are enclosed. A second window hole (92) is provided in the area of the . 4. The eccentric support structure for spanning control force and anti-buckling according to claim 1, wherein the main frame beam (1) is provided with a strut node (7) for fixing the strut (6). 5. The eccentric support structure for spanning control force and preventing buckling according to claim 2, characterized in that the metal plate (5) is fixed to the inner side of the rectangular inner frame. 6. The cross-span control force anti-buckling eccentric support structure according to claim 1, wherein the main frame beam (1) is an H-shaped steel beam or a box-shaped steel beam; The main frame column (2) is an H-shaped steel column, a box-shaped steel column, a steel tube concrete column, a steel tube concrete column or a steel tube restrained steel concrete column. 7. The eccentric support structure for spanning control force and anti-buckling according to claim 1, characterized in that, The inner frame beam (3) is an H-shaped steel beam or a box-shaped steel beam; The inner frame column (4) is an H-shaped steel column or a box-shaped steel column. 8 . The eccentric support structure for spanning control force and buckling prevention according to claim 1 , wherein the strut ( 6 ) is an H-shaped steel strut or a box-shaped steel strut. 9 .

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