CN110206368A - One kind is more across the control anti-buckling central support structure of power - Google Patents

Abstract

The invention discloses one kind more across the control anti-buckling central support structure of power, inside casing trestle, two main frame beams and two struts are provided in the region that adjacent two pillar of main frame and two main frame beams between it surround, one end that two inside casings are set a roof beam in place is both secured on the pillar of main frame of inside, the other end that upside inside casing is set a roof beam in place is fixed on the upper end of inside casing trestle, the other end that downside inside casing is set a roof beam in place is fixed on the lower end of inside casing trestle, and one end of first strut is connected with the end that the upper end of inside casing trestle and upside inside casing are set a roof beam in place；One end of second strut is connected with the end that the lower end of inside casing trestle and downside inside casing are set a roof beam in place, the other end of first strut is fixed at the upper end of outside pillar of main frame and the link position of top main frame beam, the lower end of inside casing trestle is fixed in one end of second strut, the other end of second strut is fixed at the lower end of outside pillar of main frame and the link position of bottom main frame beam, which has the characteristics that excellent earthquake resistance.

Description

A buckling-resistant central support structure for cross-span control

technical field

The invention belongs to the field of building structures, and relates to a spanning control force anti-buckling central support structure.

Background technique

The anti-lateral force 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-resisting structures used in multi-story steel structures mainly include support structures and steel plate shear wall structures, and can be subdivided into central support, eccentric support, and buckling constraints according to the different mechanical properties and structural forms. Braces (buckling-resistant braces), non-stiffened steel plate walls, stiffened steel plate walls, slotted steel plate walls, and buckling-resistant steel plate walls.

The buckling resistance of the central support is poor, especially under the action of moderate and large earthquakes, elastic or elastic-plastic buckling will inevitably occur, resulting in failure of the support, resulting in a decrease in structural stiffness and energy dissipation capacity, affecting structural safety. Eccentric braces form energy-dissipating connecting beams to dissipate energy through support offset, which can alleviate the buckling problem of the struts, but the floor will be damaged earlier under the action of horizontal loads, and in order to ensure that the energy-dissipating beams yield first, the rest of the components often It needs to be designed with too large cross-section, or even too strong, which will increase the construction cost, and the practical application is relatively limited. Buckling-restrained bracing is a kind of bracing that limits the buckling effect of the core material by coating the restraining material or components on the outside of the bracing core material. It belongs to the category of "structural buckling resistance", and it has stronger buckling resistance and better energy consumption. However, this type of support generally has a large cross-section, takes up more building space, and has a relatively complex structure and high engineering cost, so it has great limitations in practical engineering applications.

Steel plate shear walls (non-stiffened, stiffened, anti-buckling) provide rigidity to resist horizontal force through the tension field formed by the wall panels, but the tension field has a very unfavorable oblique effect on the side columns of the steel plate wall, and because the wall panels have no compression resistance The overturning moment generated by the horizontal load is mainly resisted by the force 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 instability or damage of the frame column. Therefore, it is necessary to increase the column section or use concrete filled steel pipe. 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 beams under the action of the tension field formed by the upper and lower wall panels will be largely suppressed, similar to being "embedded", so that the plasticity of the frame beams is not fully developed, and the frame columns often precede the frame beams. 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 steel plate shear walls need to be connected to frame beams and columns by bolting or welding at the construction site. The workload is heavy and the connection quality is not easy to guarantee, which hinders the assembly application of steel plate wall structures. The rigidity and bearing capacity of the slotted steel plate shear wall are weak, so there are few practical applications.

In addition to the above disadvantages, the existing anti-lateral force structure will also affect the use function of the building. In civil buildings, it is the most basic functional requirement to arrange windows for lighting, ventilation, and meeting the needs of people entering and exiting. This makes it difficult to open windows on the wall where the lateral force-resistant structure is arranged, resulting in a "black room" that affects the use of the building. This has a particularly prominent impact on multi-high-rise steel structure residential buildings and prefabricated residential buildings. Residential buildings have small column spacing, changeable apartment types, higher lighting and ventilation requirements, and fewer walls that do not need windows. Therefore, the existing It is difficult for lateral force-resistant structures to meet the diverse needs of building layouts.

Contents of the invention

The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art, and provide a span control force anti-buckling central support structure, which has high safety, excellent seismic performance, simple structure, small footprint, low cost and no impact on Features of window placement.

In order to achieve the above-mentioned purpose, the central support structure for span control force anti-buckling according to the present invention includes three parallel main frame columns distributed in sequence, wherein two main frame beams are arranged between two adjacent main frame columns;

In the area surrounded by two adjacent main frame columns and two main frame beams in between, there are inner frame columns, two main frame beams and two struts, wherein the two inner frame beams are arranged in parallel, and the two One end of the inner frame beam is fixed on the inner main frame column, the other end of the upper inner frame beam is fixed on the upper end of the inner frame column, the other end of the lower inner frame beam is fixed on the lower end of the inner frame column, the first One end of the first strut is connected to the upper end of the inner frame column and the end of the upper inner frame beam; one end of the second strut is connected to the lower end of the inner frame column and the end of the lower inner frame beam. The other end of the first strut is fixed at the connection position between the upper end of the outer main frame column and the top main frame beam, one end of the second strut is fixed at the lower end of the inner frame column, and the other end of the second strut is fixed at the outer The connection position between the lower end of the main frame column and the bottom main frame beam.

The inner main frame columns and the inner frame beams and inner frame columns connected thereto form a rectangular inner frame, wherein a metal plate is fixed inside the rectangular inner frame.

Between the middle main frame column and an outer main frame column, a first window opening is arranged in the area surrounded by the outer main frame column, two struts and two main frame beams;

Between the middle main frame column and another outer main frame column, a second window hole is arranged in the area surrounded by the outer main frame column, two struts and two main frame beams.

The connection position between the main frame beam and the frame column is provided with a brace node for fixing the brace.

The metal plate is fixed on the inner side of the rectangular inner frame through the connecting plate.

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 pipe concrete column, a steel concrete column or a steel pipe bound steel concrete column.

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

The inner frame columns are H-shaped steel columns or box-shaped steel columns.

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 stiffeners, a slotted steel plate or a perforated steel plate.

The present invention has the following beneficial effects:

During the specific operation of the span control force anti-buckling central support structure described in the present invention, the energy dissipation force control wall is composed of a rectangular inner frame and metal plates. When the support structure is subjected to horizontal loads such as earthquake loads and wind loads, the struts The horizontal load is converted into tension and compression, and acts on the rectangular inner frame. The metal plates, inner frame beams and inner frame columns yield first to dissipate energy. When the horizontal load is larger, the main frame beams yield to further dissipate the seismic energy . In addition, it should be noted that the present invention is based on the concept of force control and anti-buckling, and uses energy-dissipating force-control walls to control the maximum axial force of the struts and provide enough deformation space for the structures to yield under large earthquakes. No buckling, better anti-buckling effect, can greatly simplify the structure, reduce space occupation and reduce cost. At the same time, after the braces are anti-buckling, they have stable compressive capacity and can participate in resisting the overturning moment generated by horizontal loads, reducing the stress burden on the main frame columns and preventing their premature failure, thereby improving the seismic capacity of the structure.

Description of drawings

Fig. 1 is a structural schematic diagram of the present invention.

Among them, 1 is the main frame beam, 2 is the main frame column, 3 is the inner frame steel beam, 4 is the inner frame steel column, 5 is the metal plate, 6 is the strut, 7 is the strut node, 81 is the first window opening, 82 is the second window hole.

Detailed ways

The present invention is described in further detail below in conjunction with accompanying drawing:

Referring to Fig. 1, the central support structure for span control force and anti-buckling according to the present invention includes three parallel and sequentially distributed main frame columns 2, wherein two main frame beams 1 are arranged between two adjacent main frame columns 2 ; An inner frame column 4, two main frame beams 1 and two struts 6 are arranged in the area surrounded by two adjacent main frame columns 2 and two main frame beams 1 therebetween, wherein the two inner frame The beams 3 are arranged in parallel, and one ends of the two inner frame beams are 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 other end of the lower inner frame beam 3 One end is fixed on the lower end of the inner frame column 4, one end of the first strut 6 is connected with the upper end of the inner frame column 4 and the end of the upper inner frame beam 3; one end of the second strut 6 is connected with the inner frame column 4 and the end of the lower inner frame beam 3 are connected, the other end of the first strut 6 is fixed at the connection position between the upper end of the outer main frame column 2 and the top main frame beam 1, and the second strut One end of 6 is fixed on the lower end of the inner frame column 4, and the other end of the second strut 6 is fixed at the connecting position between the lower end of the outer main frame column 2 and the bottom main frame beam 1.

The inner main frame column 2 and the inner frame beam 3 and inner frame column 4 connected therewith form a rectangular inner frame, wherein a metal plate 5 is fixed inside the rectangular inner frame; the middle main frame column 2 and an outer main frame Between the frame columns 2, a first window hole 81 is arranged in the area surrounded by the outer main frame column 2, two struts 6 and two main frame beams 1; the middle main frame column 2 and the other outer main frame Between the frame columns 2 , a second window opening 82 is provided in the area surrounded by the outer main frame columns 2 , two struts 6 and two main frame beams 1 .

The connection position between the main frame beam 1 and the frame column 2 is provided with a strut node 7 for fixing the strut 6; the metal plate 5 is fixed on the inner side of the rectangular inner frame through the connecting plate.

Main frame beam 1 is H-shaped steel beam or box-shaped steel beam; main frame column 2 is H-shaped steel column, box-shaped steel column, steel pipe concrete column, steel concrete column or steel pipe-constrained 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 strut or box-shaped steel strut; metal plate 5 is low yield point steel plate, high-strength steel plate or foam steel plate, or The metal plate 5 is a steel plate with stiffeners, a slotted steel plate or a perforated steel plate.

One end of the first strut 6 is connected with the upper end of the inner frame column 4 and the end of the upper inner frame beam 3; one end of the second strut 6 is connected with the lower end of the inner frame column 4 and the lower inner frame beam 3 The other end of the first strut 6 is fixed at the connection position between the upper end of the outer main frame column 2 and the top main frame beam 1, and one end of the second strut 6 is fixed at the end of the inner frame column 4 The lower end, the other end of the second strut 6 is fixed at the connection position between the lower end of the outer main frame column 2 and the bottom main frame beam 1, so that the force on the main frame beam 1 and the outer main frame column 2 can be transmitted well Give energy consumption control wall.

Claims (10)

1. one kind is more across the control anti-buckling central support structure of power, which is characterized in that including three main frames that are parallel and being sequentially distributed Trestle (2), wherein two main frame beams (1) are provided between adjacent two pillar of main frame (2)；

Inside casing trestle is provided in the region that adjacent two pillar of main frame (2) and two main frame beams (1) between it surround (4), two main frame beam (1) Ji Lianggen struts (6), wherein two inside casings set a roof beam in place (3) be arranged in parallel, and two inside casings are set a roof beam in place One end be both secured on the pillar of main frame (2) of inside, inside casing the set a roof beam in place other end of (3) in upside is fixed on inside casing trestle (4) Upper end, the set a roof beam in place other end of (3) of downside inside casing are fixed on the lower ends of inside casing trestle (4), one end of first strut (6) and inside casing The set a roof beam in place end of (3) of the upper end of trestle (4) and upside inside casing is connected；One end of second strut (6) and inside casing trestle (4) The set a roof beam in place end of (3) of lower end and downside inside casing is connected, and the other end of first strut (6) is fixed on outside pillar of main frame (2) Upper end and top main frame beam (1) link position at, one end of second strut (6) is fixed under inside casing trestle (4) End, the other end of second strut (6) are fixed on the lower end of outside pillar of main frame (2) and the connection position of bottom main frame beam (1) Set place.

2. according to claim 1 more across the control anti-buckling central support structure of power, which is characterized in that the pillar of main frame of inside (2) it sets a roof beam in place (3) with inside casing connected to it and inside casing trestle (4) forms rectangular inner frames, wherein is solid in the rectangular inner frames Surely there are metal plate (5).

3. according to claim 1 more across the control anti-buckling central support structure of power, which is characterized in that intermediate pillar of main frame (2) between the pillar of main frame (2) in an outside, the pillar of main frame (2) in outside, two strut (6) Ji Lianggen main frame beams (1) The first window opening (81) are provided in the region surrounded；

Between intermediate pillar of main frame (2) and the pillar of main frame (2) in another outside, pillar of main frame (2), two struts in outside (6) the second window opening (82) are provided in the region that Ji Lianggen main frame beam (1) surrounds.

4. it is according to claim 1 more across control the anti-buckling central support structure of power, which is characterized in that main frame beam (1) with The link position of frame column (2) is provided with the strut node (7) for fixing strut (6).

5. according to claim 2 more across the control anti-buckling central support structure of power, which is characterized in that metal plate (5) passes through Connecting plate is fixed on the inside of rectangular inner frames.

6. according to claim 1 more across the control anti-buckling central support structure of power, which is characterized in that main frame beam (1) is H Section steel beam or steel beam with box shape；

Pillar of main frame (2) is H profile steel column, steel box column, steel core concrete column, profile steel concrete column or steel tube binding type steel reinforced concrete Solidifying earth pillar.

7. according to claim 1 more across the control anti-buckling central support structure of power, which is characterized in that

Inside casing sets a roof beam in place (3) as H profile steel beam or steel beam with box shape；

Inside casing trestle (4) is H profile steel column or steel box column.

8. according to claim 1 more across the control anti-buckling central support structure of power, which is characterized in that strut (6) is H profile steel Strut or box steel strut.

9. according to claim 1 more across the control anti-buckling central support structure of power, which is characterized in that metal plate (5) is low Yield point steel plate, high strength steel plate or foam steel plate.

10. according to claim 1 more across the control anti-buckling central support structure of power, which is characterized in that metal plate (5) is band The steel plate of ribbed stiffener, crack steel plate or punching steel plate.