CN112049271A - Section steel-square steel pipe combined type buckling restrained brace - Google Patents
Section steel-square steel pipe combined type buckling restrained brace Download PDFInfo
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- CN112049271A CN112049271A CN202010964015.5A CN202010964015A CN112049271A CN 112049271 A CN112049271 A CN 112049271A CN 202010964015 A CN202010964015 A CN 202010964015A CN 112049271 A CN112049271 A CN 112049271A
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/92—Protection against other undesired influences or dangers
- E04B1/98—Protection against other undesired influences or dangers against vibrations or shocks; against mechanical destruction, e.g. by air-raids
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
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- Joining Of Building Structures In Genera (AREA)
- Buildings Adapted To Withstand Abnormal External Influences (AREA)
Abstract
The invention provides a section steel-square steel pipe combined type buckling restrained brace which comprises a core stressed component, an outer restrained component and a positioning pin. The core stress component is formed by connecting a plurality of profile steel energy dissipation sections, a middle limiting section, a plurality of square steel tube elastic sections and two end connecting sections along a longitudinal coaxial line, the outer constraint component is a square steel tube, the core stress component is positioned inside the outer constraint component, and the middle limiting section and the square steel tube elastic sections of the core stress component are tightly attached to the inner side of the outer constraint component. And a gap is formed between the profile steel energy dissipation section and the external constraint component. The invention can effectively limit the torsional deformation of the elastic section of the square steel pipe, thereby limiting the overall torsional deformation of the core stressed component, reducing the surface strain of the section steel energy dissipation section of the core stressed component and enhancing the low-cycle fatigue performance of the buckling restrained brace. Meanwhile, the section steel and the square steel pipe are common materials for construction sites, field cutting and installation can be performed according to use requirements, and the steel pipe is simple in structure, light in self weight, convenient to use and low in cost.
Description
Technical Field
The invention relates to a buckling restrained brace, in particular to a section steel-square steel tube combined type buckling restrained brace, and belongs to the field of structural engineering.
Background
Earthquake is one of serious natural disasters possibly suffered by cities and buildings thereof, and strong earthquake not only causes structural damage, but also causes secondary disasters such as fire disasters and linkage effects. The concept of energy dissipation and shock absorption is that seismic energy is absorbed and dissipated through an energy dissipation device, the response and damage of the structure are effectively reduced, the serious damage of the main structure is avoided, and the energy dissipation device is one of important means for realizing the defense of the structure based on the property state.
Buckling restrained bracer (BRB for short) is taken as an energy dissipation and shock absorption component with excellent performance, is rapidly popularized and applied in developed countries such as Japan, America and the like, and is still in a starting stage of research and application in China. The buckling restrained brace keeps elasticity under the action of a small earthquake, can provide enough lateral rigidity for a structure as a common central brace, can effectively restrain a core stress component of the buckling restrained brace by a peripheral restraining component under the action of fortifying intensity or rarely occurring earthquake to avoid integral or local instability, and can dissipate energy through tension and compression yielding.
The restraining part of the traditional buckling restraining support is usually formed by combining steel and concrete, and although the manufacturing cost is relatively low, certain problems exist: (1) the quality of the poured concrete, such as compactness, is greatly influenced by the process, the manufacturing time can be prolonged by the solidification of the concrete, and the production efficiency is reduced; (2) the local incompact concrete can cause the local part to be crushed by the core stressed part, thereby causing the local buckling of the core stressed part and reducing the buckling restrained brace performance; (3) in order to ensure that the core stressed component can be freely pulled and pressed, the core stressed component is usually wrapped by an unbonded material, so that the surface of the concrete and the surface of the core stressed component are separated, and meanwhile, a certain space is provided for the core stressed component to expand under the compression. But actually, the non-adhesive material is difficult to wrap the core stress component according to the design requirement in the concrete pouring and vibrating process, and the performance of the buckling restrained brace is reduced.
Further, a buckling restrained brace with an all-steel restrained section is adopted, for example, in patent publication CN101974950B, a core stressed member of the buckling restrained brace is a circular rod-shaped core bar, but since the bending stiffness of the circular rod-shaped core bar in each direction is equal, and overall or local buckling may occur in any direction, the restrained brace should comprehensively restrain the core bar along the whole length in each direction, so the structural requirement is complex, and the material consumption is large. The buckling restrained brace has the advantages that the circular core rod of the buckling restrained brace is pressed to generate torsional deformation, and the existence of the torsional deformation can cause the local deformation of the circular core rod to be increased, so that the low-cycle fatigue performance of the buckling restrained brace is reduced. In addition, the bamboo-shaped round rod energy dissipation rod provided by the patent publication CN106760855B adopts the scheme that the energy dissipation section is manufactured by cutting the round rod along the length direction, so that the cross section of the energy dissipation section is two parallel opposite sides, and the other two short sides are original arcs, so that the material processing is inconvenient, and the cost is high.
Disclosure of Invention
The invention aims to solve the problems that concrete is difficult to fill densely, no binding material is difficult to arrange and adverse effects on performance are caused in a buckling restrained brace of a steel and concrete combined restrained component, a core rod is twisted and deformed when the round core rod buckling restrained brace is pressed, and a bamboo-shaped round rod energy dissipation rod material is inconvenient to process and high in cost.
The purpose of the invention is realized as follows:
a section steel-square steel pipe combined type buckling restrained brace comprises a core stressed component, an outer restrained component and a positioning pin.
The core stress component is formed by connecting a plurality of profile steel energy dissipation sections, a middle limiting section, a plurality of square steel pipe elastic sections and two end connecting sections along a longitudinal coaxial line, the middle limiting section is positioned in the middle of the core stress component, the profile steel energy dissipation sections and the square steel pipe elastic sections are arranged alternately and are arranged on two sides of the middle limiting section and form a whole together with the middle limiting section, and the two ends of the outer side are fixedly connected with the two end connecting sections to form the core stress component together. The section steel energy dissipation section can be made of H-shaped steel, I-shaped steel or other combined section types, the middle limiting section, the square steel pipe elastic section and the two end connecting sections are made of square steel pipes, and a hole is formed in the middle of the middle limiting section in the direction perpendicular to the axis.
The external restraint component is a square steel pipe. The core stress component is located inside the outer constraint component, the length of the outer constraint component meets the requirement that one end of the two end connecting sections is located inside the outer constraint component, and the periphery of the middle limiting section, the square steel pipe elastic section and the two end connecting sections of the core stress component are located in the outer constraint component and are tightly attached to the inner side of the outer constraint component. And a gap is formed between the profile steel energy dissipation section and the external constraint component. The outer ends of the two end connecting sections extend out of the two end pipe orifices of the outer constraint component and are connected with the structure.
A second hole is formed in the middle of the outer constraint component in the vertical direction, the diameter of the second hole is slightly larger than that of the first hole in the middle limiting section, and the positioning pin can penetrate through the second hole and the first hole.
The invention also includes such features:
1. the two end connecting sections are square steel pipes, and the periphery of the part of the two end connecting sections positioned in the outer constraint component is tightly attached to the inner side of the outer constraint component;
2. the lengths of the plurality of profile steel energy dissipation sections of the core stress component are gradually increased from two ends of the core stress component to the middle;
3. and the core stress component section steel energy dissipation section is connected with the middle limiting section, the square steel pipe elastic section and the two end connecting sections in a welding manner.
The energy dissipation section of the core stressed component is formed by section steel (H-shaped, I-shaped or other combined sections), and the deformation of the section steel is mainly bending deformation when the section steel is stressed by a shaft, so that the torsional deformation of the energy dissipation section is avoided to a great extent. In addition, the middle limiting section, the elastic section of the square steel pipe and the parts of the connecting sections at the two ends, which are positioned in the outer constraint part, are tightly attached to the inner side of the outer constraint part, the cross section of the middle limiting section, the elastic section of the square steel pipe and the connecting sections at the two ends are square, the outer constraint part can effectively constrain the torsional deformation of the outer constraint part, and therefore the lateral deformation and the torsional deformation of the core stressed part are also. The design further reduces the surface strain of the core component and improves the low cycle fatigue performance of the energy consumption rod; as the core stress component and the outer constraint component of the buckling constraint support are contacted to generate friction, the rod axial force of the core stress component is gradually reduced from two ends to the middle part, and therefore, the length of the section steel energy dissipation section can be properly increased from two ends to the middle part. The welding connection is adopted, the structure is simple, the section of the rod piece is not weakened, the processing is convenient, the automatic operation is easy to adopt, and the construction is rapid.
The buckling restrained brace adopting the section steel and the square steel pipe as the core stress members is used for reducing the earthquake response of an engineering structure and replaces a common brace and a traditional buckling restrained brace.
Compared with the prior art, the invention has the beneficial effects that:
the energy dissipation section of the core stress component of the section steel-square steel pipe combined type buckling restrained brace is formed by section steel (H-shaped, I-shaped or other combined sections), deformation of the section steel-square steel pipe combined type buckling restrained brace is mainly bending deformation when the section steel-square steel pipe combined type buckling restrained brace is under axial pressure, and torsional deformation of the energy dissipation section is avoided to a great extent. In addition, the middle limiting section, the elastic section of the square steel pipe and the parts of the connecting sections at the two ends, which are positioned in the outer constraint part, are tightly attached to the inner side of the outer constraint part, the cross section of the middle limiting section, the elastic section of the square steel pipe and the connecting sections at the two ends are square, the outer constraint part can effectively constrain the torsional deformation of the outer constraint part, and therefore the lateral deformation and the torsional deformation of the core stressed part are also. The design further reduces the surface strain of the core component and improves the low cycle fatigue performance of the energy consumption rod.
The core stress component of the profile steel-square steel tube combined buckling restrained brace is formed by connecting a plurality of profile steel energy dissipation sections, a middle limiting section, a plurality of square steel tube elastic sections and two end connecting sections along a longitudinal coaxial line, and the bending deformation of the energy dissipation sections can be restrained by the outer restraining component under the action of an axial force, so that the energy dissipation sections are prevented from being subjected to overlarge buckling deformation while yielding, and therefore mortar does not need to be filled between the outer restraining component and the profile steel energy dissipation sections or extra components are added to restrain the energy dissipation sections, so that the energy dissipation bar is simple in structure, convenient to machine and light in self weight.
The energy dissipation section cross-sectional area of the core component of the profile steel-square steel tube combined type buckling restrained brace is smaller than that of the middle limiting section, the elastic section of the square steel tube and the connecting sections at the two ends, so that the yield force is smaller, the requirement on the rigidity of the external restrained component is lower, the external restrained component can be a simple square steel tube, the profile steel-square steel tube combined type buckling restrained brace is simple in structure, light in self weight and convenient to install.
Compared with the traditional buckling restrained brace which needs to be provided with stiffening ribs in a non-restrained area of a core component to ensure the stability of the traditional buckling restrained brace, the structure is simpler.
The limiting section is arranged in the middle of the section steel-square steel pipe combined type buckling restrained brace, so that the sliding of the outer restraint part along the core part, which is caused by the absence of the limiting section, is prevented, the local deformation of the energy consumption section under the load action is reduced, and the hysteresis performance of the energy consumption device is improved.
The structural steel-square steel pipe combined type buckling restrained brace adopts structural steel, accords with an industrial production mode, enables construction to be more economical, can improve labor productivity, reduces field wet operation, improves construction environment, avoids field processing such as field cutting and the like, is high in construction speed and convenient, and ensures the quality of the structural steel-square steel pipe combined type buckling restrained brace. Meanwhile, the section form of the section steel energy dissipation section and the section form of the square steel pipe can be independently designed according to actual requirements on site, and the flexibility is high.
Drawings
FIG. 1 is a plan view of embodiment 1 of the present invention;
FIG. 2 is a sectional view taken along line A-A in example 1 of the present invention;
FIG. 3 is a sectional view taken along line B-B in example 1 of the present invention;
FIG. 4 is a C-C sectional view of example 1 of the present invention;
FIG. 5 is a plan view of a core force-receiving member in accordance with embodiment 1 of the present invention;
FIG. 6 is a D-D sectional view of a core force-receiving member according to example 1 of the present invention;
FIG. 7 is a sectional view taken along line E-E of a core force-receiving member according to example 1 of the present invention;
FIG. 8 is a sectional view taken along line F-F of a core force-receiving member according to example 1 of the present invention;
FIG. 9 is a sectional view taken along line G-G of a core force-receiving member according to example 1 of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Example 1
As shown in figures 1-9, the section steel-square steel tube combined buckling restrained brace comprises a core stressed component 1, an outer restraining component 2 and a positioning pin 3;
the core component 1 is formed by connecting a plurality of section steel energy dissipation sections 1-1, a middle limiting section 1-2, a plurality of square steel pipe elastic sections 1-3 and two end connecting sections 1-4 coaxially along the longitudinal direction, the middle limiting section 1-2 is positioned in the middle of the core stress component 1, the section steel energy dissipation sections 1-1 and the square steel pipe elastic sections 1-3 are arranged at intervals and are arranged at two sides of the middle limiting section 1-2 to form a whole together with the middle limiting section 1-2, and the two outer ends are fixedly connected with the two end connecting sections 1-4 to form the core stress component 1 together. The section steel energy dissipation section 1-1 is made of H-shaped steel, the middle limiting section 1-2, the square steel pipe elastic section 1-3 and the two end connecting sections 1-4 are made of square steel pipes, and a hole 1-2-1 is formed in the middle of the middle limiting section 1-2 in the direction vertical to the axis.
The external restraint part 2 is a square steel pipe. The core stress component 1 is positioned inside the outer constraint component 2, one end of the outer constraint component 2, which has a length satisfying that the two-end connecting sections 1-4, is positioned inside the outer constraint component 2, and the periphery of the middle limiting section 1-2, the square steel pipe elastic section 1-3 and the two-end connecting sections 1-4 of the core stress component 1, which are positioned inside the outer constraint component, are tightly attached to the inner side of the outer constraint component 2. A gap is formed between the section steel energy dissipation section 1-1 and the external restraint part 2. The outer ends of the two-end connecting sections 1-4 extend out of the two-end pipe orifices of the external constraint component 2 and are connected with the structure through hinge or fixed connection.
The middle of the external restraint part 2 is provided with a hole II 2-1 along the vertical direction, the diameter of the hole II 2-1 is slightly larger than that of a hole I1-2-1 on the middle limiting section 1-2, and the positioning pin 3 can penetrate through the hole II 2-1 and the hole I1-2-1.
The lengths of a plurality of section steel energy dissipation sections 1-1 of the core stress component 1 are gradually increased from two ends of the core stress component 1 to the middle, and the section steel energy dissipation sections 1-1 are connected with a middle limiting section 1-2, a square steel pipe elastic section 1-3 and two end connecting sections 1-4 in a welding mode.
The manufacturing and installation processes of the section steel-square steel pipe combined type buckling restrained brace are as follows:
1. and selecting the section types, the sizes and the member lengths of the profile steel energy dissipation section, the middle limiting section, the square steel pipe elastic section and the two end connecting sections according to design requirements.
2. The section steel energy dissipation section of the core stress component is connected with the middle limiting section, the square steel pipe elastic section and the connecting sections at the two ends in a welding mode.
3. The outer constraint component and the core stressed component are fixed by a pin.
4. The section steel-square steel pipe combined type buckling restrained brace is connected with the structure through hinging or fixedly connecting.
It should be noted that, for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be construed as the protection scope of the present invention. All the components not specified in the present embodiment can be realized by the prior art.
In summary, the following steps: the invention discloses a section steel-square steel pipe combined type buckling restrained brace which comprises a core stressed component, an outer restrained component and a positioning pin. The core stress component is formed by connecting a plurality of profile steel energy dissipation sections, a middle limiting section, a plurality of square steel pipe elastic sections and two end connecting sections along a longitudinal coaxial line, the middle limiting section is positioned in the middle of the core stress component, the profile steel energy dissipation sections and the square steel pipe elastic sections are arranged alternately and are arranged on two sides of the middle limiting section and form a whole together with the middle limiting section, and the two ends of the outer side are fixedly connected with the two end connecting sections to form the core stress component together. The section steel energy dissipation section can be made of H-shaped steel, I-shaped steel or other combined section types, the middle limiting section, the square steel pipe elastic section and the two end connecting sections are made of square steel pipes, and a hole is formed in the middle of the middle limiting section in the direction perpendicular to the axis. The outer constraint component is a square steel pipe, the core stress component is positioned inside the outer constraint component, and the middle limiting section and the elastic section of the square steel pipe of the core stress component are tightly attached to the inner side of the outer constraint component. And a gap is formed between the profile steel energy dissipation section and the external constraint component. The invention can effectively limit the torsional deformation of the elastic section of the square steel pipe, thereby limiting the overall torsional deformation of the core stressed component, reducing the surface strain of the section steel energy dissipation section of the core stressed component and enhancing the low-cycle fatigue performance of the buckling restrained brace. Meanwhile, the section steel and the square steel pipe are common materials for construction sites, field cutting and installation can be performed according to use requirements, and the steel pipe is simple in structure, light in self weight, convenient to use and low in cost.
Claims (4)
1. A section steel-square steel tube combined type buckling restrained brace is characterized by comprising a core stress component (1), an outer restraining component (2) and a positioning pin (3);
the core stress component is formed by connecting a plurality of section steel energy dissipation sections (1-1), a middle connecting section (1-2), a plurality of square steel pipe elastic sections (1-3) and two end connecting sections (1-4) along a longitudinal coaxial line, the middle limiting section is positioned in the middle of the core stress component, the section steel energy dissipation sections and the square steel pipe elastic sections are arranged alternately and are arranged on two sides of the middle limiting section to form a whole together with the middle limiting section, and the two ends of the outer side are fixedly connected with the two end connecting sections to form the core stress component together. The section steel energy dissipation section can be H-shaped steel, I-shaped steel or other combined section types, the middle limiting section, the elastic section of the square steel pipe and the connecting sections at the two ends are made of square steel pipes, and the middle of the middle limiting section is provided with a first hole (1-2-1) along the direction of a vertical axis;
the external restraint component is a square steel pipe. The core stress component is located inside the outer constraint component, the length of the outer constraint component meets the requirement that one end of the two end connecting sections is located inside the outer constraint component, and the middle limiting section and the square steel pipe elastic section of the core stress component are tightly attached to the inner side of the outer constraint component. And a gap is formed between the profile steel energy dissipation section and the external constraint component. The outer ends of the two end connecting sections extend out of the two end pipe orifices of the outer constraint component and are connected with the structure;
the middle of the external constraint component is provided with a second hole (2-1) along the vertical axis direction, the diameter of the second hole is slightly larger than that of the first hole on the middle limiting section, and the positioning pin can penetrate through the second hole and the first hole.
2. The section steel-square steel tube combined type buckling restrained brace as claimed in claim 1, wherein the two end connecting sections are square steel tubes, and the periphery of the portion of the square steel tubes located in the outer restraining component is tightly attached to the inner side of the outer restraining component.
3. The section steel-square steel tube combined type buckling restrained brace as claimed in claim 1, wherein the lengths of the plurality of section steel energy dissipation sections of the core stress component gradually increase from two ends to the middle of the core stress component.
4. The section steel-square steel tube combined type buckling restrained brace as claimed in claim 1, wherein the core stress component section steel energy dissipation section is connected with the middle limiting section, the square steel tube elastic section and the connecting sections at the two ends in a welding mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010964015.5A CN112049271A (en) | 2020-09-15 | 2020-09-15 | Section steel-square steel pipe combined type buckling restrained brace |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010964015.5A CN112049271A (en) | 2020-09-15 | 2020-09-15 | Section steel-square steel pipe combined type buckling restrained brace |
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| CN112049271A true CN112049271A (en) | 2020-12-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010964015.5A Pending CN112049271A (en) | 2020-09-15 | 2020-09-15 | Section steel-square steel pipe combined type buckling restrained brace |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001227192A (en) * | 1999-06-30 | 2001-08-24 | Nippon Steel Corp | Axially yielding elasto-plastic hysteresis brace and damping steel structure |
| CN101105053A (en) * | 2007-07-10 | 2008-01-16 | 中国建筑科学研究院 | Double-layer sleeve linear buckling restrained brace with transverse partition plate |
| TWM429731U (en) * | 2012-02-04 | 2012-05-21 | Nat Applied Res Laboratories | Buckling restrained brace suspension structure |
| CN105604205A (en) * | 2016-03-03 | 2016-05-25 | 中国京冶工程技术有限公司 | Modularized bamboo-shaped buckling restrained brace |
| CN105735504A (en) * | 2016-03-03 | 2016-07-06 | 东南大学 | Rectangular bamboo joint buckling restrained brace |
| CN106760855A (en) * | 2017-01-25 | 2017-05-31 | 东南大学 | Laemodipodiform pole power consumption bar |
| CN107780553A (en) * | 2016-08-29 | 2018-03-09 | 南通蓝科减震科技有限公司 | A kind of buckling-restrained bracing member |
-
2020
- 2020-09-15 CN CN202010964015.5A patent/CN112049271A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001227192A (en) * | 1999-06-30 | 2001-08-24 | Nippon Steel Corp | Axially yielding elasto-plastic hysteresis brace and damping steel structure |
| CN101105053A (en) * | 2007-07-10 | 2008-01-16 | 中国建筑科学研究院 | Double-layer sleeve linear buckling restrained brace with transverse partition plate |
| TWM429731U (en) * | 2012-02-04 | 2012-05-21 | Nat Applied Res Laboratories | Buckling restrained brace suspension structure |
| CN105604205A (en) * | 2016-03-03 | 2016-05-25 | 中国京冶工程技术有限公司 | Modularized bamboo-shaped buckling restrained brace |
| CN105735504A (en) * | 2016-03-03 | 2016-07-06 | 东南大学 | Rectangular bamboo joint buckling restrained brace |
| CN107780553A (en) * | 2016-08-29 | 2018-03-09 | 南通蓝科减震科技有限公司 | A kind of buckling-restrained bracing member |
| CN106760855A (en) * | 2017-01-25 | 2017-05-31 | 东南大学 | Laemodipodiform pole power consumption bar |
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Application publication date: 20201208 |
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