CN210421995U - Active restraint reinforcing apparatus of rectangular cross section RC post - Google Patents
Active restraint reinforcing apparatus of rectangular cross section RC post Download PDFInfo
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- CN210421995U CN210421995U CN201921221593.9U CN201921221593U CN210421995U CN 210421995 U CN210421995 U CN 210421995U CN 201921221593 U CN201921221593 U CN 201921221593U CN 210421995 U CN210421995 U CN 210421995U
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
- E04G23/0218—Increasing or restoring the load-bearing capacity of building construction elements
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Abstract
The utility model discloses an active restraint reinforcing apparatus of rectangular cross section RC post, including a plurality of rectangular frame, wherein, each rectangular frame cup joints from top to bottom in proper order and is fixed on the RC post, and each rectangular frame all includes two thin steel pipes of rectangular cross section and two NiTiNb shape memory alloy member pieces, wherein, the one end of two NiTiNb shape memory alloy member pieces all passes and is fixed on a thin steel pipe of rectangular cross section, the other end of two NiTiNb shape memory alloy member pieces all passes and is fixed on another thin steel pipe of rectangular cross section, wherein, the thin steel pipe of rectangular cross section is fixed with fixing support, fixing support is fixed on the RC post; the NiTiNb shape memory alloy rod pieces in the rectangular frames are connected with external thermal excitation power supply equipment for activating the shape memory effect of the NiTiNb shape memory alloy rod pieces, and the device can realize active constraint reinforcement of the RC column and overcome various problems brought by a traditional active constraint reinforcement method.
Description
Technical Field
The utility model belongs to the technical field of engineering structure consolidates, a rectangular cross section RC post initiative restraint reinforcing apparatus is related to.
Background
The lateral restraint can improve the brittleness of concrete and improve the strength and the deformability of the reinforced concrete member. Concrete restraint methods are divided into active and passive methods. The main difference between the two methods is that: for active restraint of concrete, the lateral restraint is applied to the structural member in the form of a pre-stress prior to the application of the axial compressive force. Whereas for passive restraint, the restraining force is applied indirectly to the elements as a result of the compressive lateral expansion of the concrete. In order for the passive restraint to be fully "activated", the concrete will inevitably be damaged to some extent. After the unconstrained concrete is compacted in the elastic deformation phase, the volume begins to expand rapidly until failure. Similarly, passively constrained concrete also undergoes volume compression in the elastic region, but when the concrete undergoes a brief volume expansion, the passive constraining force is constantly "activated" and the concrete volume can continue to be compressed. For actively confined concrete, the pre-compressive stress induces a certain volume strain before the load is applied, and a greater axial stress is applied to overcome the constraint of the volume strain. The point of failure of the concrete is further delayed compared to passively confined concrete. In conclusion, the concrete has better mechanical property by active restraint.
Currently, the most common materials for active restraint reinforcement of concrete are steel (prestressed steel wires, prestressed steel strands, and prestressed steel plate hoops) and fiber reinforced composites (FRP). However, the steel material is easily rusted and has poor durability. FRP is attached to the surface of a member using an epoxy resin as an adhesive, and may be detached. In addition, the application of the prestress of the two materials needs a special tensioning device, and the labor, material and financial resources are excessively consumed.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome above-mentioned prior art's shortcoming, provide a rectangular cross section RC post initiative restraint reinforcing apparatus, the device can realize the initiative restraint reinforcement of RC post, overcomes the various problems that traditional initiative restraint reinforcing method brought.
In order to achieve the above object, the active restraint and reinforcement device for the rectangular cross section RC column of the present invention comprises a plurality of rectangular frames, wherein each rectangular frame is sequentially sleeved and fixed on the RC column from top to bottom, and each rectangular frame comprises two rectangular cross section thin steel tubes and two NiTiNb shape memory alloy rods, wherein one end of each of the two NiTiNb shape memory alloy rods passes through and is fixed on one rectangular cross section thin steel tube, and the other end of each of the two NiTiNb shape memory alloy rods passes through and is fixed on the other rectangular cross section thin steel tube, wherein the rectangular cross section thin steel tube is fixed with a fixing support which is fixed on the RC column;
the NiTiNb shape memory alloy rod pieces in the rectangular frames are connected with external thermal excitation power supply equipment for activating the shape memory effect of the NiTiNb shape memory alloy rod pieces.
On the side of the same RC column, NiTiNb shape memory alloy rod pieces and thin steel pipes with rectangular sections are distributed alternately from top to bottom in sequence.
And on the side surface of the same RC column, two adjacent thin steel pipes with rectangular sections are connected through a vertical connecting steel plate, wherein the vertical connecting steel plate penetrates through a NiTiNb shape memory alloy rod piece between the two adjacent thin steel pipes with rectangular sections and the side surface of the RC column.
The end part of the vertical connecting steel plate is provided with a buckle, and the side wall of the rectangular section thin steel pipe is provided with a groove for embedding the buckle.
And the bolt penetrates through the fixed support and is inserted into the RC column to fix the fixed support on the RC column.
The side surface of the end part of each NiTiNb shape memory alloy rod piece is provided with an external thread, and the end part of each NiTiNb shape memory alloy rod piece penetrates through the thin steel pipe with the rectangular cross section and is sleeved with a gasket and a nut to connect the thin steel pipe with the rectangular cross section and the NiTiNb shape memory alloy rod piece.
The end of the thin steel pipe with the rectangular section extends out of the side surface of the RC column by 100 mm.
The utility model discloses following beneficial effect has:
when the active restraining and reinforcing device for the RC column with the rectangular cross section is in specific operation, a plurality of rectangular frames are sequentially arranged on the RC column from top to bottom, wherein each rectangular frame consists of two rectangular section thin steel pipes and two NiTiNb shape memory alloy rod pieces, the rectangular section thin steel pipes are fixed on the RC column, when in installation, each NiTiNb shape memory alloy rod piece is connected with external thermal excitation power supply equipment, the resistance of the NiTiNb shape memory alloy rod piece is utilized to thermally activate the shape memory effect, the restoring force generated by the NiTiNb shape memory alloy rod piece is transmitted to the RC column through the thin steel pipe with the rectangular cross section, therefore, active constraint force is generated on the RC column, active constraint reinforcement of the RC column is achieved, the defects that the prestress applying step of a traditional prestress structure is complex, the prestress construction machinery is heavy, the prestress loss is serious and the like are overcome, and the quality and the construction speed of an engineering structure are effectively improved.
Drawings
Fig. 1 is a schematic structural view of the present invention;
fig. 2 is a connection relationship diagram of the external thermal excitation power supply device 9 and the NiTiNb shape memory alloy rod 7 according to the present invention;
fig. 3 is a schematic view of the connection between the vertical steel connecting plate 1 and the thin steel pipe 3 with rectangular cross section.
Wherein: the device comprises a vertical connecting steel plate 1, a buckle 2, a rectangular section thin steel pipe 3, a groove 4, a fixed support 5, an RC column 6, a NiTiNb shape memory alloy rod 7, a nut 8, an external thermal excitation power supply device 9, an electric wire 10 and a gasket 11.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings:
referring to fig. 1 to 3, the active restraint reinforcing apparatus for a rectangular cross section RC column of the present invention comprises a plurality of rectangular frames, wherein each rectangular frame is sequentially sleeved and fixed on the RC column 6 from top to bottom, and each rectangular frame comprises two rectangular cross section thin steel tubes 3 and two NiTiNb shape memory alloy rods 7, wherein one end of each of the two NiTiNb shape memory alloy rods 7 passes through and is fixed on one rectangular cross section thin steel tube 3, and the other end of each of the two NiTiNb shape memory alloy rods 7 passes through and is fixed on the other rectangular cross section thin steel tube 3, wherein the rectangular cross section thin steel tube 3 is fixed with a fixing support 5, and the fixing support 5 is fixed on the RC column 6; the NiTiNb shape memory alloy rods 7 in each rectangular frame are connected with an external thermal excitation power supply device 9 for activating the shape memory effect of the NiTiNb shape memory alloy rods 7.
On the side surface of the same RC column 6, NiTiNb shape memory alloy rod pieces 7 and the thin steel pipes 3 with rectangular cross sections are distributed alternately from top to bottom in sequence; on the side surface of the same RC column 6, two adjacent thin steel pipes 3 with rectangular cross sections are connected through a vertical connecting steel plate 1, wherein the vertical connecting steel plate 1 penetrates through a NiTiNb shape memory alloy rod 7 between the two adjacent thin steel pipes 3 with rectangular cross sections and the side surface of the RC column 6; the end part of the vertical connecting steel plate 1 is provided with a buckle 2, and the side wall of the rectangular section thin steel pipe 3 is provided with a groove 4 for embedding the buckle 2.
The bolt penetrates through the fixed support 5 and is inserted into the RC column 6 to fix the fixed support 5 on the RC column 6; the side surface of the end part of each NiTiNb shape memory alloy rod piece 7 is provided with an external thread, the end part of each NiTiNb shape memory alloy rod piece 7 penetrates through the thin steel pipe 3 with the rectangular cross section and then is sleeved with a gasket 11 and a nut 8 to connect the thin steel pipe 3 with the rectangular cross section and the NiTiNb shape memory alloy rod piece 7; the end of the rectangular section thin steel pipe 3 protrudes 100mm out of the side of the RC column 6.
The utility model discloses an implementation process does:
1) firstly, mounting a rectangular section thin steel pipe 3 on an RC column 6 through a fixed support 5;
2) connecting adjacent thin steel pipes 3 with rectangular cross sections on each side surface of an RC column 6 into a whole by using a vertical connecting steel plate 1;
3) connecting the end part of the NiTiNb shape memory alloy rod 7 with the end part of the thin steel pipe 3 with the rectangular section by using a nut 8 and a gasket 11;
4) each NiTiNb shape memory alloy rod 7 is connected with external thermal excitation power supply equipment 9 through an electric wire 10, the resistance heat of the NiTiNb shape memory alloy rod 7 is used for activating the shape memory effect, and the restoring force generated by the NiTiNb shape memory alloy rod 7 is transmitted to the RC column 6 through the thin steel pipe 3 with the rectangular cross section, so that the active restraining force is generated on the RC column 6.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
Claims (7)
1. The active restraint and reinforcement device for the RC column with the rectangular cross section is characterized by comprising a plurality of rectangular frames, wherein each rectangular frame is sequentially sleeved and fixed on the RC column (6) from top to bottom and comprises two thin steel pipes (3) with the rectangular cross section and two NiTiNb-shaped memory alloy rod pieces (7), one end of each NiTiNb-shaped memory alloy rod piece (7) penetrates through and is fixed on one thin steel pipe (3) with the rectangular cross section, the other end of each NiTiNb-shaped memory alloy rod piece (7) penetrates through and is fixed on the other thin steel pipe (3) with the rectangular cross section, a fixed support (5) is fixed on the thin steel pipe (3) with the rectangular cross section, and the fixed support (5) is fixed on the RC column (6);
the NiTiNb shape memory alloy rod pieces (7) in each rectangular frame are connected with external thermal excitation power supply equipment (9) used for activating the shape memory effect of the NiTiNb shape memory alloy rod pieces (7).
2. The active restraint and reinforcement device for the rectangular-section RC column according to claim 1, wherein NiTiNb-shaped memory alloy rods (7) and the rectangular-section thin steel pipes (3) are sequentially distributed at intervals from top to bottom on the side surface of the same RC column (6).
3. The active restraint and reinforcement device for the rectangular cross-section RC column according to claim 1, characterized in that on the side surface of the same RC column (6), two adjacent rectangular cross-section thin steel pipes (3) are connected through a vertical connecting steel plate (1), wherein the vertical connecting steel plate (1) passes through a NiTiNb shape memory alloy rod piece (7) between the two adjacent rectangular cross-section thin steel pipes (3) and the side surface of the RC column (6).
4. The active restraint and reinforcement device for the rectangular-section RC column is characterized in that a buckle (2) is arranged at the end part of the vertical connecting steel plate (1), and a groove (4) for embedding the buckle (2) is formed in the side wall of the rectangular-section thin steel pipe (3).
5. The active restraint reinforcement device for the rectangular cross-section RC column as claimed in claim 1, wherein a bolt is inserted into the RC column (6) through the fixing support (5) to fix the fixing support (5) to the RC column (6).
6. The active restraining and reinforcing device for the rectangular-section RC column according to claim 1, wherein the side surface of the end of each NiTiNb-shaped memory alloy rod (7) is provided with external threads, and the end of each NiTiNb-shaped memory alloy rod (7) penetrates through the rectangular-section thin steel pipe (3) and is sleeved with a gasket (11) and a nut (8) to connect the rectangular-section thin steel pipe (3) with the NiTiNb-shaped memory alloy rod (7).
7. The active restraint reinforcement device for the rectangular cross-section RC column according to claim 1, wherein the end of the rectangular cross-section thin steel pipe (3) protrudes 100mm out of the side surface of the RC column (6).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921115507 | 2019-07-16 | ||
| CN2019211155076 | 2019-07-16 |
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| CN210421995U true CN210421995U (en) | 2020-04-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921221593.9U Active CN210421995U (en) | 2019-07-16 | 2019-07-30 | Active restraint reinforcing apparatus of rectangular cross section RC post |
| CN201910696390.3A Pending CN110359728A (en) | 2019-07-16 | 2019-07-30 | A kind of rectangular section RC column active constraint bracing means |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910696390.3A Pending CN110359728A (en) | 2019-07-16 | 2019-07-30 | A kind of rectangular section RC column active constraint bracing means |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110359728A (en) * | 2019-07-16 | 2019-10-22 | 西安建筑科技大学 | A kind of rectangular section RC column active constraint bracing means |
| CN111608415A (en) * | 2020-05-13 | 2020-09-01 | 武汉大学 | Square steel tube concrete column reinforcing method based on high-ductility cement-based material |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100622390B1 (en) * | 2005-07-25 | 2006-09-11 | 안숙희 | Reinforced system for column structure using steel plate and shape memory alloy strip or band |
| KR101719179B1 (en) * | 2016-03-24 | 2017-03-23 | 한국시설안전공단 | Column reinforced with spiral |
| CN206233626U (en) * | 2016-04-27 | 2017-06-09 | 河南理工大学 | Perforation rib pull bar constraint rectangular steel pipe outsourcing self-compacting concrete reinforced column |
| CN106639351A (en) * | 2016-12-23 | 2017-05-10 | 大连理工大学 | Reinforcing method for winding thermal excitation embedded shape memory alloy wires on concrete column |
| CN210421995U (en) * | 2019-07-16 | 2020-04-28 | 西安建筑科技大学 | Active restraint reinforcing apparatus of rectangular cross section RC post |
-
2019
- 2019-07-30 CN CN201921221593.9U patent/CN210421995U/en active Active
- 2019-07-30 CN CN201910696390.3A patent/CN110359728A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110359728A (en) * | 2019-07-16 | 2019-10-22 | 西安建筑科技大学 | A kind of rectangular section RC column active constraint bracing means |
| CN111608415A (en) * | 2020-05-13 | 2020-09-01 | 武汉大学 | Square steel tube concrete column reinforcing method based on high-ductility cement-based material |
| CN111608415B (en) * | 2020-05-13 | 2021-07-06 | 武汉大学 | Square steel tube concrete column reinforcing method based on high-ductility cement-based material |
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| Publication number | Publication date |
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| CN110359728A (en) | 2019-10-22 |
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