CN106978908B - Embedded prestress assembly type frame reinforcing structure with shearing mild steel damper - Google Patents
Embedded prestress assembly type frame reinforcing structure with shearing mild steel damper Download PDFInfo
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- CN106978908B CN106978908B CN201710332168.6A CN201710332168A CN106978908B CN 106978908 B CN106978908 B CN 106978908B CN 201710332168 A CN201710332168 A CN 201710332168A CN 106978908 B CN106978908 B CN 106978908B
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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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- 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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Abstract
The invention discloses an embedded prestress assembly type frame reinforcing structure with a shearing mild steel damper, which comprises an original frame structure to be reinforced, an embedded frame structure and the shearing mild steel damper, wherein the embedded frame structure is positioned in the plane of the original frame structure and comprises an embedded frame beam and an embedded frame column, the embedded frame beam and the embedded frame column are disconnected at the middle positions, and the shearing mild steel damper is arranged at the disconnected position; the prestressed tendons respectively penetrate through the embedded frame beam and the embedded frame column and are anchored on the connected shearing soft steel damper, and a gap is reserved between the embedded frame and the original frame and is connected through seam sealing grouting. The additional integral substructure not only contributes to the shock resistance of the reinforced integral structure by the self shock resistance bearing capacity and energy consumption capacity, but also can improve the stress state and deformation mode of the original structure, so that the structure forms a more reasonable damage yield mechanism, and the shock resistance of the original structure is more fully utilized.
Description
Technical Field
The invention relates to the technical field of civil engineering seismic strengthening, in particular to an embedded prestress assembly type frame strengthening structure with a shearing mild steel damper.
Background
The traditional structure consumes energy by utilizing the anti-seismic form of 'hard-to-hard' of the beam column, and the energy dissipation and shock absorption technology is to arrange a damper at the key part of the structure, dissipate seismic energy through the deformation of the damper, reduce the seismic response of the structure and lighten the damage degree of the structure. The soft steel damper has stable hysteretic characteristic and good low-cycle fatigue characteristic, is not influenced by the environmental temperature, and has simple structure, convenient replacement after the earthquake, clear damping mechanism and obvious damping effect. In recent years, various forms of mild steel dampers, such as stiffening dampers, circular ring dampers, shear plate dampers, dual-function mild steel dampers and the like, have been researched and developed at home and abroad.
The additional integral substructure reinforcement utilizes the cooperative work of the additional integral substructure and the original structure, so that the integral stress state of the structure can be effectively improved, the seismic performance of the structure is improved, the normal use of the building structure can not be interrupted as much as possible during the reinforcement construction, and the method is an economic, reasonable and efficient structure system reinforcement method. At present, most of additional substructure reinforcement needs cast-in-place operation of substructure, which can generate pollution and noise and has complicated and long construction period. In addition, the additional substructure is mostly in an external mode, occupies the surrounding space to a certain extent, and has the problems of connection, cooperative work and the like.
Disclosure of Invention
The purpose of the invention is as follows: in order to overcome the defects in the prior art, the invention provides an embedded prestress assembly type frame reinforcing structure with a shearing mild steel damper.
The technical scheme is as follows: in order to solve the technical problem, the embedded prestress assembly type frame reinforcing structure with the shearing mild steel damper comprises an original frame structure to be reinforced, an embedded frame structure and the shearing mild steel damper, wherein the embedded frame structure is positioned in the plane of the original frame structure and comprises an embedded frame beam and an embedded frame column, the embedded frame beam and the embedded frame column are disconnected at the middle positions, and the shearing mild steel damper is arranged at the disconnected position; the prestressed tendons respectively penetrate through the embedded frame beam and the embedded frame column and are anchored on the connected shearing soft steel damper, and a gap is reserved between the embedded frame and the original frame and is connected through seam sealing grouting.
The shear soft steel damper is placed in the middle of the embedded frame beam and the embedded frame column, under horizontal earthquake load, the bending moment of the middle of the embedded frame beam and the embedded frame column is small, the shear force is large, and through plastic deformation of the shear soft steel damper, interlayer displacement of a structure is limited, the damage position of the structure is controlled, and earthquake energy is consumed.
The shearing soft steel damper comprises two side channel plates and a closed soft steel ring, wherein the two side channel plates are provided with anchoring holes, and a prestressed tendon in the embedded frame structure penetrates through the anchoring holes of the channel plates and is anchored on the channel plates; soft steel blocks are protruded on the groove plates at two sides at intervals, and the clear distance of the soft steel blocks is the thickness of the closed soft steel ring so as to be embedded into the closed soft steel ring; the soft steel block and the closed soft steel ring are provided with connecting holes at corresponding positions, and the groove plate and the soft steel ring are connected by screwing a nut through penetrating a bolt.
When the embedded frame beam and the embedded frame column are prefabricated, the corrugated pipe is embedded so as to stretch the prestressed tendons; the original frame structure comprises an original frame beam and original frame columns, and the upper surface and the lower surface of the original frame beam, the left surface and the right surface of the original frame columns and the connection surfaces of the embedded frames are subjected to scabbling treatment so as to enhance the connection performance of the original frame structure and the embedded frame structure; after the embedded frame structure is hoisted in place, a 10-15mm grouting joint is reserved between the embedded frame structure and the original frame structure.
The prestressed ribs penetrate through the through holes and the corrugated pipes of the embedded frame columns on two sides, and are anchored on the groove plates of the adjacent shearing mild steel dampers after being tensioned; and through holes are formed in the original frame column and the embedded frame column corresponding to the embedded frame beam corrugated pipe, and the prestressed tendons penetrate through the through holes and the embedded frame beam corrugated pipes on two sides and are anchored on the groove plates of the adjacent shearing mild steel dampers after being tensioned.
After the prestressed tendons are anchored, cement mortar is used for sealing the grouting joints, and the mixed grouting material is poured into the grouting joints.
Has the advantages that: the embedded prestress assembly type frame reinforcing structure with the shear mild steel damper has the following beneficial effects:
1. the additional integral substructure not only contributes to the shock resistance of the reinforced integral structure with the self shock resistance bearing capacity and energy consumption capacity, but also can improve the stress state and the deformation mode of the original structure, so that the structure forms a more reasonable damage yield mechanism, and the shock resistance of the original structure is more fully utilized.
2. The shearing soft steel damper is placed in the middle of the embedded frame beam and the embedded frame column, under the horizontal earthquake load, the bending moment in the middle of the embedded frame beam and the embedded frame column is small, the shearing force is large, the interlayer displacement of the structure is limited through the plastic deformation of the shearing soft steel damper, the damage position of the structure is controlled, the earthquake energy is consumed, and the structure can be quickly repaired by replacing a soft steel ring after the earthquake; the prestressed tendons can reduce the residual displacement of the structure, improve the rigidity of the structure and realize the self-resetting function.
Drawings
FIG. 1 is a structural view of a shear mild steel damper according to the present invention;
FIG. 2 is a schematic view of a shear mild steel damper according to the present invention;
FIG. 3 is a schematic view of the attachment of the iframe of the present invention;
FIG. 4 is a schematic view of the connection between the inner frame and the original frame according to the present invention;
FIG. 5 is a detail view of the connection between the inner frame and the original frame according to the present invention;
FIG. 6 is a front view of the present invention showing the connection between the inner frame and the original frame;
FIG. 7 is a schematic diagram illustrating the connection between the embedded frame and the original frame;
FIG. 8 is a front view of the present invention showing the attachment of the inner frame to the original frame;
FIG. 9 is a schematic diagram of the original frame of the present invention;
FIG. 10 is a schematic view of the reinforcement of the original frame according to the present invention;
FIG. 11 is a finished front view of the original frame reinforcement of the present invention;
in the figure: 1-original frame structure, 2-embedded frame structure, 3-embedded precast beam, 4-embedded precast column, 5-original frame beam, 6-original frame column, 7-shearing soft steel damper, 8-prestressed tendon in embedded precast beam, 9-prestressed tendon in embedded precast column, 10-groove plate, 11-closed soft steel ring, 12-soft steel block, 13-connecting hole, 14-through hole, 15-anchoring hole, 16-connecting bolt, 17-nut, 18-corrugated pipe, 19-grouting material and 20-grouting seam.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
The invention discloses an embedded prestress assembly type frame reinforcing structure with a shearing mild steel damper, which has the following technical idea: the embedded precast beam 3 and the embedded precast column 4 are connected with the original structure 1 in the plane and work cooperatively, the embedded frame beam 3 and the embedded frame column 4 are disconnected at the middle position, and a shearing mild steel damper 7 is arranged; the self-resetting of the structure is realized by the prestressed tendons 8 in the embedded precast beams and the prestressed tendons 9 in the embedded precast columns, and the shearing soft steel damper 7 consumes seismic energy.
Specifically, as shown in fig. 1-2, the shear mild steel damper 7 is composed of three parts, a groove plate 10 on both sides and a closed mild steel ring 11 in the middle; the channel plates 10 on the two sides are provided with anchoring holes 15, and the prestressed tendons 8 and the prestressed tendons 9 embedded into the frame structure 2 penetrate through the anchoring holes 15 and are anchored on the channel plates 10; the two side channel plates 10 are protruded with soft steel blocks 12 at intervals, and the clear distance between the soft steel blocks 12 is the thickness of the closed soft steel ring 11 so as to be embedded into the closed soft steel ring 11; the soft steel block 12 and the soft steel ring 11 are provided with connecting holes 13 at corresponding positions, and the groove plate 10 and the soft steel ring 11 are connected by penetrating bolts 16 and tightening nuts 17. The shearing soft steel damper 7 is placed in the middle of the embedded frame beam 3 and the embedded frame column 4, under the horizontal earthquake load, the bending moment of the middle of the embedded frame beam 3 and the embedded frame column 4 is small, the shearing force is large, and through the plastic deformation of the shearing soft steel damper 7, the interlayer displacement of the structure is limited, the damage position of the structure is controlled, and the earthquake energy is consumed.
As shown in fig. 3-8, the present invention comprises an original frame structure 1 to be reinforced, an embedded frame structure 2 and a shear mild steel damper 7. The embedded frame 2 is positioned in the plane of the original frame structure 1. The prestressed tendons 8 and the prestressed tendons 9 respectively penetrate through the embedded frame beam 3 and the embedded frame column 4 and are anchored on the connected shear mild steel damper 7. A grouting joint 20 is reserved between the embedded frame 2 and the original frame 1 and is connected through joint sealing grouting.
When the embedded frame beam 3 and the embedded frame column 4 are prefabricated, the corrugated pipe 18 is embedded so as to stretch the prestressed tendons 8 and the prestressed tendons 9 conveniently. The original frame structure 1 comprises an original frame beam 5 and an original frame column 6, and the upper surface and the lower surface of the original frame beam 5, the left surface and the right surface of the original frame column 6 and the connecting surfaces of the embedded frame structure 2 are properly chiseled so as to enhance the connecting performance of the original frame structure 1 and the embedded frame structure 2; after the embedded frame beam 3 and the embedded frame column 4 are hoisted in place, a 10-15mm grouting joint 20 is reserved between the embedded frame beam and the original frame structure 1. A through hole 14 is formed in the original frame beam 5 corresponding to the corrugated pipe 18 of the embedded frame column 4, and the prestressed tendon 9 penetrates through the through hole 14 and the embedded frame column corrugated pipes 18 on two sides, and is anchored on the groove plate 10 of the adjacent shearing mild steel damper 7 after being tensioned; and through holes 14 are formed in the original frame column 6 and the embedded frame column 4 corresponding to the corrugated pipes 18 of the embedded frame beam 3, and the prestressed tendons 8 penetrate through the through holes 14 and the embedded frame beam corrugated pipes 18 on two sides and are anchored on the groove plates 10 of the adjacent shearing mild steel dampers 7 after being tensioned.
As shown in fig. 9-11, for the members of the embedded frame structure 2 near the edge nodes and corner nodes of the original frame structure 1, after the prestressed tendons 8 and 9 pass through the corrugated pipes 18 and the through holes 14, one end of each prestressed tendon is anchored on the groove plate 10 of the adjacent shearing mild steel damper 7, and the other end of each prestressed tendon is anchored on the member of the original frame 1; after the prestressed tendons 8 and 9 are anchored, cement mortar is adopted to seal the grouting joints 20, and the mixed grouting material 19 is poured into the grouting joints 20. The grouting material 19 has strong fluidity and excellent self-compaction performance, so that all gaps can be filled without stirring after the grouting material 19 is grouted; and (5) finishing reinforcement.
The embedded frame structure 2 is connected with the original frame structure 1 in the plane and cooperatively works after being reinforced; the shearing mild steel damper 7 generates plastic deformation, limits the interlayer displacement of the structure, controls the damage position of the structure, consumes earthquake energy, and can realize quick repair of the structure by replacing the mild steel ring 11 after the earthquake. The prestressed tendons 8 and 9 can reduce the residual displacement of the structure, improve the rigidity of the structure and realize the self-resetting of the structure.
The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.
Claims (5)
1. The utility model provides an embedded prestressing force assembled frame reinforced structure of mild steel attenuator is cuted in area, includes the former frame construction of treating the reinforcement, embedded frame construction and shear mild steel attenuator, its characterized in that: the embedded frame structure is positioned in the plane of the original frame structure and comprises an embedded frame beam and an embedded frame column, the embedded frame beam and the embedded frame column are disconnected at the middle positions, and a shearing mild steel damper is arranged at the disconnected position; the prestressed tendons respectively penetrate through the embedded frame beam and the embedded frame column and are anchored on the connected shearing soft steel damper, and a gap is reserved between the embedded frame and the original frame and is connected through seam sealing grouting; the shearing soft steel damper comprises two side groove plates and a closed soft steel ring, wherein the two side groove plates are provided with anchoring holes, and prestressed tendons in the embedded frame structure penetrate through the anchoring holes of the groove plates and are anchored on the groove plates; soft steel blocks are protruded on the groove plates at two sides at intervals, and the clear distance of the soft steel blocks is the thickness of the closed soft steel ring so as to be embedded into the closed soft steel ring; the soft steel block and the closed soft steel ring are provided with connecting holes at corresponding positions, and the groove plate and the soft steel ring are connected by screwing a nut through penetrating a bolt.
2. The built-in pre-stressed fabricated frame reinforced structure with shear mild steel damper according to claim 1, wherein: the shear soft steel damper is placed in the middle of the embedded frame beam and the embedded frame column, the middle of the embedded frame beam and the embedded frame column is small in bending moment and large in shear force under horizontal seismic load, and through plastic deformation of the shear soft steel damper, interlayer displacement of the structure is limited, the damage position of the structure is controlled, and seismic energy is consumed.
3. The built-in pre-stressed assembled frame reinforced structure with shear mild steel damper according to claim 2, characterized in that: when the embedded frame beam and the embedded frame column are prefabricated, the corrugated pipe is embedded so as to stretch the prestressed tendons; the original frame structure comprises an original frame beam and original frame columns, and the upper surface and the lower surface of the original frame beam, the left surface and the right surface of the original frame columns and the connection surfaces of the embedded frames are subjected to scabbling treatment so as to enhance the connection performance of the original frame structure and the embedded frame structure; after the embedded frame structure is hoisted in place, a 10-15mm grouting seam is reserved between the embedded frame structure and the original frame structure.
4. The built-in pre-stressed fabricated frame reinforced structure with shear mild steel damper according to claim 3, wherein: a through hole is formed in the original frame beam corresponding to the corrugated pipe in the embedded frame column, and the prestressed tendons penetrate through the through hole and the corrugated pipes of the embedded frame columns on two sides and are anchored on the groove plates of the adjacent shearing mild steel dampers after being tensioned; and through holes are formed in the original frame column and the embedded frame column corresponding to the embedded frame beam corrugated pipe, and the prestressed tendons penetrate through the through holes and the embedded frame beam corrugated pipes on two sides and are anchored on the groove plates of the adjacent shearing mild steel dampers after being tensioned.
5. The built-in pre-stressed fabricated frame reinforced structure with shear mild steel damper according to claim 3, wherein: after the prestressed tendons are anchored, cement mortar is used for sealing the grouting joints, and the mixed grouting material is poured into the grouting joints.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710332168.6A CN106978908B (en) | 2017-05-12 | 2017-05-12 | Embedded prestress assembly type frame reinforcing structure with shearing mild steel damper |
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| CN201710332168.6A CN106978908B (en) | 2017-05-12 | 2017-05-12 | Embedded prestress assembly type frame reinforcing structure with shearing mild steel damper |
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| CN106978908B true CN106978908B (en) | 2022-08-26 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6530090B1 (en) * | 2018-02-09 | 2019-06-12 | 住友重機械プロセス機器株式会社 | Guide car |
| CN111173160A (en) * | 2020-02-27 | 2020-05-19 | 安徽尚德科技有限公司 | Slot type soft steel damper |
| CN111173159A (en) * | 2020-02-27 | 2020-05-19 | 安徽尚德科技有限公司 | Separated type mild steel damper |
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| JP2008127744A (en) * | 2006-11-16 | 2008-06-05 | Maeda Corp | Aseismic strengthening structure of existing building |
| CN103243820A (en) * | 2013-05-29 | 2013-08-14 | 吕西林 | Function recoverable prefabricate beam column node |
| JP2013204270A (en) * | 2012-03-28 | 2013-10-07 | Grape Co Ltd | Reinforcement structure of building |
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| CN203783172U (en) * | 2014-01-28 | 2014-08-20 | 河海大学 | Profiled steel plate shear wall for reinforcing RC frame structure |
| CN104100018A (en) * | 2014-07-28 | 2014-10-15 | 东南大学 | Function-restorable soft steel damper |
| CN206942187U (en) * | 2017-05-12 | 2018-01-30 | 东南大学 | Embedded prestressing force assembling frame ruggedized construction with shearing mild steel damper |
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2017
- 2017-05-12 CN CN201710332168.6A patent/CN106978908B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008127744A (en) * | 2006-11-16 | 2008-06-05 | Maeda Corp | Aseismic strengthening structure of existing building |
| JP2013204270A (en) * | 2012-03-28 | 2013-10-07 | Grape Co Ltd | Reinforcement structure of building |
| CN103243820A (en) * | 2013-05-29 | 2013-08-14 | 吕西林 | Function recoverable prefabricate beam column node |
| CN103498573A (en) * | 2013-10-12 | 2014-01-08 | 北京筑福国际工程技术有限责任公司 | Method for strengthening existing frame additionally provided with steel support with border |
| CN103711330A (en) * | 2013-12-30 | 2014-04-09 | 北京工业大学 | Method for using prefabricated reinforced concrete frame to reinforce existing structure through prestressing assembly |
| CN203783172U (en) * | 2014-01-28 | 2014-08-20 | 河海大学 | Profiled steel plate shear wall for reinforcing RC frame structure |
| CN103866868A (en) * | 2014-02-21 | 2014-06-18 | 同济大学 | Beam post steel ring hinging section point |
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| CN206942187U (en) * | 2017-05-12 | 2018-01-30 | 东南大学 | Embedded prestressing force assembling frame ruggedized construction with shearing mild steel damper |
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