CN212427517U - Steel frame construction based on SMA knee brace - Google Patents

Steel frame construction based on SMA knee brace Download PDF

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Publication number
CN212427517U
CN212427517U CN202020797937.7U CN202020797937U CN212427517U CN 212427517 U CN212427517 U CN 212427517U CN 202020797937 U CN202020797937 U CN 202020797937U CN 212427517 U CN212427517 U CN 212427517U
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steel
angle
brace
steel column
sma
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CN202020797937.7U
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Chinese (zh)
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王凯
符宇欣
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Shanghai Tianhua Songyi Architectural Design Co ltd
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Shanghai Tianhua Songyi Architectural Design Co ltd
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Abstract

The utility model provides a steel frame construction based on SMA knee brace, including steel column, girder steel, knee brace and two connection supports, the tip of girder steel with the lateral wall of steel column is connected and mutually perpendicular, the both ends of knee brace are respectively through one connect the support with girder steel and steel connection, and make girder steel, steel column and knee brace constitute triangular support structure, the material of knee brace is shape memory alloy. Due to the characteristics of super elasticity and self-resetting, the shape memory alloy can cause the angle brace to elastically deform under the action of earthquake, thereby consuming earthquake energy. Simultaneously, the self-resetting characteristic enables the shape of the angle brace to be quickly recovered after an earthquake, so that the steel frame structure can be quickly recovered to the initial state after the earthquake, and the service life of the steel frame structure is ensured. And the connecting support is used for connecting the angle brace and the steel beam or the steel column so as to increase the bearing capacity of the connecting node of the angle brace and the steel beam or the steel column and reduce the influence of the deformation of the angle brace on the steel beam and the steel column.

Description

Steel frame construction based on SMA knee brace
Technical Field
The utility model relates to a building structure technical field especially relates to a steel frame construction based on SMA knee-brace.
Background
The steel frame structure system is a frame structure composed of steel beams and steel columns in the longitudinal direction and the transverse direction of a house, is used for bearing and resisting lateral force, has the characteristics of flexible space separation, light dead weight, material saving, flexible building plane arrangement and the like, and is widely applied to the field of buildings. However, the existing steel frame structure system has small lateral force resistance, low bearing capacity and large influence of welding process and materials on the seismic performance, and the connection node of the steel beam and the steel column is easily subjected to brittle failure under the action of an earthquake, so that the use of the steel frame structure system in an earthquake fortification area is limited. One of the solutions adopted at present is to provide a central support in the steel frame structure system to improve the strength and the lateral stiffness of the steel frame structure. However, although the central support structure has a large rigidity, the arrangement of the whole structure is not as flexible as the steel frame, and the seismic performance of the central support structure is restricted by the buckling of the supporting pieces. Under the action of an earthquake, the support piece of the central support structure is easy to laterally buckle, so that the bearing capacity and rigidity of the structure are rapidly reduced, the lateral movement between the structures is remarkably increased, and the safety of the whole structure is influenced.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a steel frame construction based on SMA knee-brace improves steel frame construction's shock resistance through the knee-brace that adopts the material to be shape memory alloy to and add the bearing capacity that the connection support comes to connect corner-brace and girder steel or steel column in order to improve steel frame construction, guarantee when steel frame construction has sufficient anti side rigidity and intensity that its arrangement mode's flexibility is guaranteed.
In order to achieve the above object, the present invention provides a steel frame structure based on SMA knee brace, including steel column, girder steel, knee brace and two connection supports, the tip of girder steel with the lateral wall of steel column is connected and mutually perpendicular, the both ends of knee brace respectively through one the connection support with girder steel and steel column connection, and make girder steel, steel column and knee brace constitute triangular support structure, the material of knee brace is shape memory alloy.
Optionally, the connecting support is a closed cavity structure, the connecting support has opposite top and bottom walls, the bottom wall of the connecting support is attached to and connected with the surface of the steel column or the steel beam, and the top wall of the connecting support is connected with the angle brace.
Optionally, the corner brace extends through the top wall of the connecting support and into the cavity of the connecting support.
Optionally, an included angle is formed between the plane of the top wall and the plane of the bottom wall, and the center line of the corner support is perpendicular to the plane of the top wall.
Optionally, the outer wall of the corner brace and the top wall are fixedly connected by welding.
Optionally, the steel beam and the steel column are both made of high-strength steel, and the steel beam and the steel column are welded and fixed through angle steel.
Optionally, the steel beam with the steel column all includes web and two flange plates, two are connected respectively at the both ends of web the lateral wall of flange plate, the web of steel beam and two equal perpendicular to of flange plate of steel column, the angle steel includes mutually perpendicular's first curb plate and second curb plate, first curb plate with the flange plate laminating of steel column, the second curb plate with the web laminating of steel beam, the web of steel beam with first curb plate reaches the juncture welding of second curb plate.
Optionally, the width of the second side plate in the direction perpendicular to the axial direction of the steel beam is smaller than the width of the web plate of the steel beam in the direction perpendicular to the axial direction of the steel beam.
Optionally, the cross-section of the corner brace along a direction perpendicular to the axial direction thereof is box-shaped.
The utility model provides a pair of among steel frame construction based on SMA knee brace, including steel column, girder steel, knee brace and two connection supports, the tip of girder steel with just mutually perpendicular is connected to the lateral wall of steel column, the both ends of knee brace are respectively through one connect the support with girder steel and steel connection, and make girder steel, steel column and knee brace constitute triangular support structure, the material of knee brace is shape memory alloy. Due to the characteristics of super elasticity and self-resetting, the shape memory alloy can cause the angle brace to elastically deform under the action of earthquake, thereby consuming earthquake energy. Simultaneously, the self-resetting characteristic enables the shape of the angle brace to be quickly recovered after an earthquake, so that the steel frame structure can be quickly recovered to the initial state after the earthquake, and the service life of the steel frame structure is ensured. And the support is connected with the angle brace and the steel beam or the steel column through the connecting support to increase the bearing capacity of the connecting node of the angle brace and the steel beam or the steel column and reduce the influence of the deformation of the angle brace on the steel beam and the steel column, so that the steel frame structure is ensured to have enough lateral rigidity and strength, and the flexibility of the arrangement mode of the steel frame structure is also ensured.
Drawings
Fig. 1 is a perspective view of a steel frame structure based on SMA angle braces according to an embodiment of the present invention;
fig. 2 is a front view of a steel frame structure based on SMA angle braces according to an embodiment of the present invention;
fig. 3 is a right side view of a SMA knee brace based steel frame structure provided by an embodiment of the present invention;
wherein the reference numerals are:
10-steel column; 20-a steel beam; 30-a knee brace; 40-connecting a support; 50-angle steel.
Detailed Description
The following description of the embodiments of the present invention will be described in more detail with reference to the drawings. The advantages and features of the present invention will become more apparent from the following description. It should be noted that the drawings are in simplified form and are not to precise scale, and are provided for convenience and clarity in order to facilitate the description of the embodiments of the present invention.
As shown in fig. 1 to 3, the present embodiment provides a steel frame structure based on SMA angle braces, which includes a steel column 10, a steel beam 20, an angle brace 30 and two connecting supports 40, wherein ends of the steel beam 20 are connected to side walls of the steel column 10 and perpendicular to each other, two ends of the angle brace 30 are respectively connected to the steel beam 20 and the steel column 10 through one connecting support 40, so that the steel beam 20, the steel column 10 and the angle brace 30 form a triangular support structure, and the angle brace 30 is made of Shape Memory Alloy (SMA).
Specifically, the angle brace 30 is disposed between the steel beam 20 and the steel column 10, and the center line of the angle brace 30, the center line of the steel beam 20, and the center line of the steel column 10 form a triangle, so that the steel frame formed by the steel beam 20 and the steel column 10 is more stable, and has higher strength and lateral stiffness by using the principle of triangle stability even though the steel beam 20, the steel column 10, and the angle brace 30 form a triangular support structure. In addition, the arrangement of the angle brace 30 is beneficial to the transmission of bending moment in the steel frame structure, so that the plastic hinge of the connection node of the steel beam 20-the steel column 10 moves outwards, the brittle failure of the connection node of the steel beam 20-the steel column 10 under the action of earthquake is prevented, and the integral safety of the structure is ensured. Meanwhile, the arrangement of the angle brace 30 can also reduce the calculated length of the steel column 10, thereby reducing the section requirement of the steel column 10, and the use requirement of the structure can be met without arranging stiffening ribs on the steel beam 20 and the steel column 10, thereby accelerating the construction progress and saving the construction cost.
In the event of an earthquake, the angle brace 30 is stressed as a main stress member and works as an integrated lateral stress resisting system with energy consumption characteristics with the steel beam 20 and the steel column 10. Under the action of small shock, the angle brace 30 can provide lateral stiffness for the steel frame structure, so that the steel frame structure has good lateral movement resistance. Under the action of 'heavy shock', the corner brace 30 generates shear yielding and is used as a main energy consumption component for hysteretic energy consumption, so that the steel frame structure has better energy consumption performance and deformation capability.
In this embodiment, the angle brace 30 is made of Shape Memory Alloy (SMA), and because the Shape Memory Alloy (SMA) has super elasticity and self-resetting characteristics, the angle brace 30 elastically deforms under the action of an earthquake to consume earthquake energy, and the propagation of the earthquake energy is reduced, so that the steel beam 20 and the steel column 10 are both in an elastic state. The self-resetting characteristic enables the angle brace 30 to recover the shape after an earthquake, so that the connection node of the steel beam 20 and the steel column 10 can be quickly recovered to the initial state after the earthquake, and the service life of the angle brace 30 structure is guaranteed. In addition, under the action of an earthquake, the plastic hinge of the structure of the corner brace 30 often appears at the middle position of the corner brace 30 first, after the earthquake, the plastic hinge can be cut at the connecting node of the corner brace 30 and the connecting support 40, the middle section of the corner brace 30 can be directly replaced, and the corner brace 30 with the same section can be welded again. Under the action of a large earthquake, the angle brace 30 as an energy dissipation element consumes a large amount of earthquake capacity, so that the elastic stress of the steel beam 20 and the steel column 10 is ensured, the using function of the structure can be recovered by replacing the energy dissipation element angle brace 30, and the repair of the structure of the angle brace 30 after the earthquake is accelerated.
Alternatively, the cross section of the corner brace 30 in the direction perpendicular to the axial direction thereof is box-shaped. The box-shaped section belongs to a closed section steel section, the torsion resistance is good, the height of the section is small, and the corner brace 30 adopting the box-shaped section can effectively prevent the instability of the section, so that the stable energy consumption capability of the section is ensured. In the present embodiment, the cross section of the corner brace 30 along the direction perpendicular to the axial direction is "square", but other shapes are also possible, and the present application is not limited thereto.
Both ends of the angle brace 30 are connected to the steel beam 20 and the steel column 10 through one of the connecting supports 40. In the embodiment, the connecting support 40 is used for connecting the angle brace 30 with the steel beam 20 and the steel column 10, and compared with directly welding the two ends of the angle brace 30 on the steel beam 20 and the steel column 10 respectively, the connection of the angle brace 30 with the connecting support 40 can increase the bearing capacity at the connecting node of the angle brace 30 with the steel beam 20 or the steel column 10, prevent the connecting node from being damaged, and simultaneously can reduce the influence of the deformation of the angle brace 30 on the steel beam 20 and the steel column 10 as much as possible. With reference to fig. 1, the connecting support 40 is a closed cavity structure, the connecting support 40 has opposite top and bottom walls, the bottom wall of the connecting support 40 is attached to and connected with the surface of the steel column 10 or the steel beam 20, and the top wall of the connecting support 40 is connected with the angle brace 30. In this embodiment, the connecting support 40 is an irregular hexahedron having a cavity therein.
Optionally, the angle brace 30 extends through the top wall of the connecting support 40 and into the cavity of the connecting support 40 to better ensure the bearing capacity at the connecting node of the angle brace 30 and the connecting support 40 and prevent the connecting node from being damaged. In this embodiment, the outer wall of the angle brace 30 is welded to the top wall of the connecting support 40, so that the connecting node between the angle brace 30 and the connecting support 40 has sufficient strength and better stability due to the welding. Of course, other connection methods, such as bolt connection, may be adopted, and the application is not limited thereto.
Optionally, an included angle is formed between the plane of the top wall and the plane of the bottom wall, and the center line of the angle brace 30 is perpendicular to the plane of the top wall, so that the axial force of the angle brace 30 is transmitted, and the stability of the connection node of the angle brace 30 and the connection support 40 is increased.
In this embodiment, the steel columns 10 and the steel beams 20 are, for example, steel sections or reinforced concrete members, and the application is not limited thereto. The section steel includes but is not limited to H-shaped steel or I-shaped steel, and can be other special-shaped steel. In this embodiment, the steel beam 20 and the steel column 10 are both H-shaped steel, and the H-shaped steel is made of high-strength steel, for example, high-strength steel with strength grades of 460MP and 490 MP. Compared with common steel, the high-strength steel has higher yield strength and tensile strength, can ensure the elastic stress state of the steel beam 20 and the steel column 10 under the action of an earthquake, and can reduce the size and the dosage of the steel beam 20 and the steel column 10, thereby reducing the welding workload and the dosage of welding materials and improving the construction efficiency. Therefore, the steel beam 20 and the steel column 10 made of the high-strength steel not only can show higher structural efficiency, but also can bring considerable economic and social benefits.
Referring to fig. 1 to 3, the steel beam 20 and the steel column 10 are welded and fixed by an angle steel 50. Due to the fact that the steel beam 20 and the steel column 10 are directly connected in an all-welded mode, the ductility of the connection joint of the steel beam 20 and the steel column 10 is poor, and brittle failure is easy to occur under the action of an earthquake. And the steel beam 20 and the steel column 10 are connected by the angle steel 50 as an intermediate connection member so that the connection node has good ductility and high strength. Meanwhile, the angle steel 50 is used for connecting the steel beam 20 and the steel column 10, which is simpler than a traditional steel frame adopting bolt connection, and can improve construction errors caused by bolt hole deviation in bolt connection.
In this embodiment, the steel beam 20 and the steel column 10 both include a web and two flange plates, two lateral walls of the flange plates are connected respectively to two ends of the web, the web of the steel beam 20 and the two flange plates are perpendicular to the flange plates of the steel column 10, the angle steel 50 includes a first lateral plate and a second lateral plate that are perpendicular to each other, the first lateral plate is attached to the flange plates of the steel column 10, the second lateral plate is attached to the web of the steel beam 20, and the web of the steel beam 20 is welded to the junctions of the first lateral plate and the second lateral plate. The two side plates of the angle steel 50 are respectively attached to the steel beam 20 and the steel column 10 to increase the contact area, the connection stability is guaranteed through welding, and the construction process for connecting the steel beam 20 and the steel column 10 is simplified. During specific operation, weld first curb plate of angle steel 50 on steel column 10 earlier, then weld girder steel 20 on angle steel 50's second curb plate in order to reduce the welded degree of difficulty for welding quality is more stable. Optionally, the width of the second side plate in the direction perpendicular to the axial direction of the steel beam 20 is smaller than the width of the web plate in the direction perpendicular to the axial direction of the steel beam 20, so as to reduce the welding amount.
To sum up, the embodiment of the utility model provides a steel frame construction based on SMA knee brace, including steel column, girder steel, knee brace and two connection supports, the tip of girder steel with the lateral wall of steel column is connected and mutually perpendicular, the both ends of knee brace respectively through one connect the support with girder steel and steel connection, and make girder steel, steel column and knee brace constitute triangular support structure, the material of knee brace is shape memory alloy. Due to the characteristics of super elasticity and self-resetting, the shape memory alloy can cause the angle brace to elastically deform under the action of earthquake, thereby consuming earthquake energy. Simultaneously, the self-resetting characteristic enables the shape of the angle brace to be quickly recovered after an earthquake, so that the steel frame structure can be quickly recovered to the initial state after the earthquake, and the service life of the steel frame structure is ensured. And the support is connected with the angle brace and the steel beam or the steel column through the connecting support to increase the bearing capacity of the connecting node of the angle brace and the steel beam or the steel column and reduce the influence of the deformation of the angle brace on the steel beam and the steel column, so that the steel frame structure is ensured to have enough lateral rigidity and strength, and the flexibility of the arrangement mode of the steel frame structure is also ensured.
The above description is only for the preferred embodiment of the present invention, and does not limit the present invention. Any technical personnel who belongs to the technical field, in the scope that does not deviate from the technical scheme of the utility model, to the technical scheme and the technical content that the utility model discloses expose do the change such as the equivalent replacement of any form or modification, all belong to the content that does not break away from the technical scheme of the utility model, still belong to within the scope of protection of the utility model.

Claims (9)

1. The steel frame structure based on the SMA angle brace is characterized by comprising a steel column, a steel beam, an angle brace and two connecting supports, wherein the end part of the steel beam is connected with the side wall of the steel column and is perpendicular to the side wall of the steel column, the two ends of the angle brace are respectively connected with the steel beam and the steel column through one connecting support, the steel beam, the steel column and the angle brace form a triangular support structure, and the angle brace is made of shape memory alloy.
2. A steel frame structure based on SMA angle braces according to claim 1, wherein the connecting support is a closed cavity structure having opposite top and bottom walls, the bottom wall of the connecting support is attached to the surface of the steel column or beam, and the top wall of the connecting support is attached to the angle brace.
3. A steel frame structure based on SMA angle stays as claimed in claim 2, wherein the angle stays extend through the top wall of the connection mount and into the cavity of the connection mount.
4. A steel frame structure based on SMA gussets in claim 2, wherein the plane of the top wall and the plane of the bottom wall have an angle therebetween, and the centerline of the gusset is perpendicular to the plane of the top wall.
5. A steel frame structure based on SMA gussets in claims 2 or 3, wherein the outer wall of the gusset is fixedly connected to the top wall by welding.
6. The SMA angle brace-based steel frame structure of claim 1, wherein the steel beam and the steel column are formed of high strength steel, and the steel beam and the steel column are fixed by angle welding.
7. The SMA angle brace-based steel frame structure of claim 6, wherein each of the steel beam and the steel column comprises a web and two flange plates, the two ends of the web connect the side walls of the two flange plates respectively, the web and the two flange plates of the steel beam are perpendicular to the flange plates of the steel column, the angle steel comprises a first side plate and a second side plate perpendicular to each other, the first side plate is attached to the flange plates of the steel column, the second side plate is attached to the web of the steel beam, and the web of the steel beam is welded to the junction of the first side plate and the second side plate.
8. The SMA angle brace-based steel frame structure of claim 7, wherein the width of the second side plate in the direction perpendicular to the axial direction of the steel beam is smaller than the width of the web of the steel beam in the direction perpendicular to the axial direction of the steel beam.
9. A steel frame structure based on SMA angle stays according to claim 1, characterized in that the section of the angle stay perpendicular to its axial direction is box-shaped.
CN202020797937.7U 2020-05-13 2020-05-13 Steel frame construction based on SMA knee brace Active CN212427517U (en)

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Application Number Priority Date Filing Date Title
CN202020797937.7U CN212427517U (en) 2020-05-13 2020-05-13 Steel frame construction based on SMA knee brace

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115162517A (en) * 2022-09-08 2022-10-11 中冶建筑研究总院有限公司 Rust damage steel structure beam column node anticorrosion reinforcing apparatus, rust damage steel structure beam column node

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115162517A (en) * 2022-09-08 2022-10-11 中冶建筑研究总院有限公司 Rust damage steel structure beam column node anticorrosion reinforcing apparatus, rust damage steel structure beam column node

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