A window-type grid-supported multi-lateral force-resisting braced frame

Abstract

A window-type grid-supported multi-lateral force-resistant support frame includes columns, beams, and grid support components; two columns are arranged in parallel, and a plurality of beams are arranged vertically between the two columns at equal intervals, so that the space between the two columns is divided into a plurality of rectangular frames; a support component is fixedly arranged in each rectangular frame. The grid support system of the present invention forms a lattice beam by optimizing the grid form, indirectly reduces the frame height, effectively reduces the calculated length of the support rod, has a small slenderness ratio of the support rod, has good anti-buckling ability, is not prone to buckling failure of the support rod, and is easy to control support buckling failure.

Description

Technical Field

[0001] The invention belongs to the technical field of lateral force resistance support frames, and in particular relates to a window-type grid-supported multiple lateral force resistance support frame. Background Art

[0002] Steel structure buildings can greatly reduce construction time because their components can be manufactured in factories and installed on site. In addition, the steel in steel structure buildings can be recycled, which can greatly reduce construction waste and is more environmentally friendly. Therefore, they are widely used in industrial and civil buildings. This urgently requires new technologies to support the design and construction of multi-story buildings.

[0003] For steel structures, as the height of high-rise and super-high-rise residential buildings increases, the influence of lateral load effects (including earthquake effects and wind loads, etc.) becomes more prominent. Therefore, lateral force resistance and seismic resistance of the structure are usually improved through lateral force resisting components. The steel frame-support system is a commonly used system in multi-story steel structures.

[0004] In order to improve the lateral stiffness and lateral bearing capacity of existing steel structures, large supports and other components are usually used. The ductility of the structure is poor. Especially under the action of reciprocating horizontal earthquakes, when the force of the structure enters the elastic-plastic range, the shear capacity of the floors and the lateral stiffness of the structure drop sharply, the lateral displacement between floors increases excessively, and finally the overall instability and damage of the structure. The current lateral force-resistant components affect the beauty of the building, the installation of the wall, and cannot be organically unified with the enclosure. Summary of the invention

[0005] The object of the present invention is to provide a window-type grid-supported multi-lateral force-resisting support frame to solve the above-mentioned problems.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] A window-type grid-supported multi-anti-lateral force support frame comprises columns, beams and grid support components; two columns are arranged in parallel, and a number of beams are arranged vertically between the two columns at equal intervals, so that the two columns are divided into a number of rectangular frames; a support component is fixedly arranged in each rectangular frame.

[0008] Furthermore, the grid support assembly includes support columns, support beams, herringbone supports, long oblique supports and short oblique supports; two symmetrical support columns are vertically arranged between the upper and lower beams of the rectangular frame, and two symmetrical support beams are vertically arranged on the two support columns to form an inner rectangular frame, and the long oblique supports are fixed along the diagonal of the inner rectangular frame; the four corners of the inner rectangular frame are extended outwardly and welded with short oblique supports, and the short oblique supports are arranged along the diagonal of the rectangular frame; herringbone supports are welded on the outer sides of the two support beams to form a grid support assembly.

[0009] Furthermore, the herringbone support includes two short oblique supports, and the two short oblique supports are welded to form a herringbone shape.

[0010] Furthermore, end plates are provided at the apex of the herringbone support, the end of the short oblique support, and both ends of the support column, and the support column is connected to the crossbeam bolts through the end plates; force transmission plates are provided on the end plates of the herringbone support and the short oblique support.

[0011] Furthermore, node plates are provided at the four inner corners of the rectangular frame and at the midpoint of the beam; matching bolt holes are provided on the node plate and the force transfer plate, and the node plate and the force transfer plate are fixedly connected by bolts.

[0012] Furthermore, the columns are rectangular steel tube columns, circular steel tube columns, rectangular steel tube concrete columns or circular steel tube concrete columns; and the crossbeams are I-shaped steel beams.

[0013] Furthermore, the supporting columns, supporting beams, long diagonal supports and short diagonal supports are all square steel pipes, round steel pipes, I-beam supports, T-shaped steel supports, L-shaped steel supports, channel steel supports, cross-shaped steel supports or L-shaped steel supports.

[0014] Compared with the prior art, the present invention has the following technical effects:

[0015] The grid support system of the present invention forms a lattice beam by optimizing the grid form, thereby indirectly reducing the frame height and effectively reducing the calculated length of the support rod. The support rod has a small slenderness ratio and good anti-buckling ability, is not prone to buckling failure of the support rod, and is easy to control support buckling failure.

[0016] The slow degradation of the stiffness of the grid support structure is more conducive to seismic energy dissipation. Since the support force is discretized into multiple rods, when a rod is damaged, the internal force is redistributed, and other rods can still provide stiffness. The stiffness of the entire structure degrades slowly and the ductility performance is better. At the same time, it still has greater stiffness and bearing capacity.

[0017] The grid support structure has a smaller cross-sectional size and is easier to hide in the maintenance wall panels, thus achieving the integration of the enclosure structure.

[0018] Grid supports can be prefabricated in factories and connected to the frame by bolts, which improves the assembly and assembly speed of the structure, fully adapts to the requirements and characteristics of prefabricated steel structures, and meets the requirements for the development of prefabricated buildings.

[0019] The structure is simple, and it is easy to install, replace and transport. The grid support can be assembled separately or hoisted as a whole, making it easy to assemble. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a detailed diagram of the framework of the present invention;

[0021] Figure 2 It is a detailed exploded view of the grid support of the present invention;

[0022] Figure 3 It is a detailed view of the grid support of the present invention;

[0023] Figure 4 It is a detailed diagram of node connection of the present invention;

[0024] Figure 5 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 6 (a)-(c) are schematic diagrams of the yield failure process of the present invention;

[0026] Figure 7 is the load displacement diagram of the present invention; DETAILED DESCRIPTION

[0027] The present invention is further described below in conjunction with the accompanying drawings:

[0028] See also Figures 1 to 7 A window-type grid-supported multi-anti-lateral force support frame includes a column 1, a beam 2 and a grid support component; two columns 1 are arranged in parallel, and a plurality of beams 2 are arranged vertically between the two columns 1 at equal intervals, dividing the two columns 1 into a plurality of rectangular frames; a support component is fixedly arranged in each rectangular frame.

[0029] The grid support assembly includes support columns 11, support beams 13, herringbone supports 12, long oblique supports 14 and short oblique supports 10; two symmetrical support columns 11 are vertically arranged between the upper and lower beams 2 of the rectangular frame, and two symmetrical support beams 13 are vertically arranged on the two support columns 11 to form an inner rectangular frame, and the long oblique supports 14 are fixedly arranged along the diagonal of the inner rectangular frame; the four corners of the inner rectangular frame are all extended outwardly and welded with short oblique supports 10, and the short oblique supports 10 are all arranged along the diagonal of the rectangular frame; the outer sides of the two support beams 13 are welded with herringbone supports 12 to form a grid support assembly. The grid support system forms a lattice beam by optimizing the grid form, indirectly reduces the frame height, and effectively reduces the calculated length of the support rod. The support rod has a small slenderness ratio and good anti-buckling ability. It is not easy to cause support rod buckling failure, and it is easy to control support buckling failure.

[0030] The slow degradation of the stiffness of the grid support structure is more conducive to seismic energy dissipation. Since the support force is discretized into multiple rods, when a rod is damaged, the internal force is redistributed, and other rods can still provide stiffness. The stiffness of the entire structure degrades slowly and the ductility performance is better. At the same time, it still has greater stiffness and bearing capacity.

[0031] The herringbone support 12 includes two short oblique supports 10, and the two short oblique supports 10 are welded to form a herringbone shape.

[0032] End plates 6 are provided at the apex of the herringbone support 12, the end of the short diagonal support 10, and both ends of the support column 11, and the support column 11 is bolted to the crossbeam 2 through the end plate 6; force transmission plates 5 are provided on the end plates 6 of the herringbone support 12 and the short diagonal support 10.

[0033] Node plates 3 are provided at the four inner corners of the rectangular frame and at the midpoint of the crossbeam 2; matching bolt holes are provided on the node plate 3 and the force transfer plate 5, and the node plate 3 and the force transfer plate 5 are fixedly connected by bolts.

[0034] The column 1 is a rectangular steel tube column, a circular steel tube column, a rectangular steel tube concrete column or a circular steel tube concrete column; the crossbeam 2 is an I-shaped steel beam.

[0035] The supporting columns 11, the supporting beams 13, the long diagonal supports 14 and the short diagonal supports 10 are all square steel pipes, round steel pipes, I-beam supports, T-shaped steel supports, L-shaped steel supports, channel steel supports, cross-shaped steel supports or L-shaped steel supports.

[0036] like Figure 1 As shown in the detailed diagram of the frame of the present invention, the single-span two-story frame is composed of two columns 1 and two beams 2. The two columns are arranged vertically, and the two ends of the beam are welded to the columns. Bolt holes are provided on the beam at the connection position with the supporting column, and a node plate is welded at the position where the frame is connected to the supporting grid through the node plate and the force transfer plate.

[0037] refer to Figure 2 Figure 3 The grid support is an exploded detailed view of the present invention and a detailed view of the grid support of the present invention. The grid support includes short oblique supports 10, support columns 11, herringbone supports 12, support beams 13, and long oblique supports 14. The formed grid support is prefabricated in a factory.

[0038] refer to Figure 4 This is a detailed view of the node connection of the present invention. The support column 11 is connected to the beam flange through the end plate, the herringbone support is connected to the frame node plate through the force transfer plate, and the short oblique support 10 is connected to the frame node plate 3 through the force transfer plate 5.

[0039] refer to Figure 5 The overall structural diagram of the present invention is as follows: Figure 3 , Figure 4 The connection method shown is connected to the frame by bolts.

[0040] The window-type grid-supported multiple lateral force-resistant support frame unit of the present invention effectively reduces the length and size of the rods while improving the lateral force resistance stability and structural ductility of the building. The grid support unit is connected to the structure by bolts, which improves the assembly and assembly speed of the structure.

[0041] The mechanical properties of the window-type grid-supported multiple lateral force-resisting braced frame unit are explained below by performing finite element simulation on the present invention.

[0042] The finite element simulation of the support frame is carried out using ABAQUS software. The frame beam is 400×200×8×12, the frame column is 350×350×14, the support column is 120×120×6, and the support rod size except the support column is 60×60×6. The finite element analysis results are as follows: Figure 6 and Figure 7 shown.

[0043] Due to the use of grid support, the ductility and seismic performance of the structure are relatively good. The failure sequence of the grid support is as follows Figure 6 As shown in (a)-(c), with the increase of vertex displacement, the diagonal brace in the grid support first yields when under compression. After the compressed diagonal brace member is destroyed, the internal force is redistributed, and the other members continue to bear the load and still provide stiffness, ensuring that the stiffness of the overall structure degrades slowly. As the load increases, the surrounding grid is destroyed, and finally the frame is destroyed. The final destruction of the overall structure is shown in Figure 6 (c).

[0044] According to the seismic concept design principle, the present invention provides a window-type grid-supported multiple lateral force-resistant support frame unit. Under the action of an earthquake, the support first dissipates energy through elastic-plastic deformation. At the same time, the grid support discretizes the support force into multiple rods. When a rod is damaged, the internal force is redistributed, and other rods can still provide rigidity. The rigidity of the entire structure degrades slowly, and the ductility performance is better. In addition, while having greater rigidity, bearing capacity and ductility, the size of the support rod is greatly reduced, which is conducive to hiding the support in the wall. The load displacement diagram is shown in Figure 2. Figure 7 As shown in the figure, the grid support has good energy dissipation capacity, which is beneficial to improving the structural ductility and lateral force resistance performance.

[0045] The above content is a further detailed description of the present invention in combination with a specific preferred embodiment. It cannot be determined that the specific embodiments of the present invention are limited to this. For ordinary technicians in the technical field to which the present invention belongs, they can make several simple inferences or substitutions without departing from the concept of the present invention, which should be regarded as belonging to the present invention and the scope of patent protection determined by the submitted claims.

Claims

1. A window-type grid-supported multi-lateral force-resisting bracing frame, characterized in that: It comprises a column (1), a crossbeam (2) and a grid support assembly; two columns (1) are arranged in parallel, a plurality of crossbeams (2) are arranged vertically between the two columns (1) at equal intervals, and the two columns (1) are divided into a plurality of rectangular frames; a support assembly is fixedly arranged in each rectangular frame; The grid support assembly comprises a support column (11), a support beam (13), a herringbone support (12), a long oblique support (14) and a short oblique support (10); two symmetrical support columns (11) are vertically arranged between the upper and lower beams (2) of the rectangular frame, and two symmetrical support beams (13) are vertically arranged on the two support columns (11) to form an inner rectangular frame, and the long oblique support (14) is fixedly arranged along the diagonal line of the inner rectangular frame; the four corners of the inner rectangular frame are all extended outwardly and welded with short oblique supports (10), and the short oblique supports (10) are all arranged along the diagonal line of the rectangular frame; the outer sides of the two support beams (13) are welded with herringbone supports (12) to form a grid support assembly; The herringbone support (12) comprises two short oblique supports (10), and the two short oblique supports (10) are welded to form a herringbone shape; End plates (6) are provided at the apex of the herringbone support (12), the end of the short oblique support (10), and both ends of the support column (11), and the support column (11) is bolted to the crossbeam (2) via the end plate (6); force transmission plates (5) are provided on the end plates (6) of the herringbone support (12) and the short oblique support (10).

2. A window-type grid-supported multi-lateral force-resisting bracing frame according to claim 1, characterized in that: Node plates (3) are arranged at the four inner corners of the rectangular frame and at the midpoint of the crossbeam (2); matching bolt holes are arranged on the node plate (3) and the force transmission plate (5), and the node plate (3) and the force transmission plate (5) are fixedly connected by bolts.

3. A window-type grid-supported multi-lateral force-resisting bracing frame according to claim 1, characterized in that: The column (1) is a rectangular steel tube column, a circular steel tube column, a rectangular steel tube concrete column or a circular steel tube concrete column; the crossbeam (2) is an I-shaped steel beam.

4. The window-type grid-supported multi-lateral force-resisting bracing frame according to claim 1, characterized in that: The supporting columns (11), the supporting beams (13), the long oblique supports (14) and the short oblique supports (10) are all square steel pipes, round steel pipes, I-beam supports, T-shaped steel supports, L-shaped steel supports, channel steel supports, cross-shaped steel supports or L-shaped steel supports.

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