CN107152097B - External prestress assembly type energy dissipation frame reinforcing structure with cantilever plate frame - Google Patents
External prestress assembly type energy dissipation frame reinforcing structure with cantilever plate frame Download PDFInfo
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- CN107152097B CN107152097B CN201710332104.6A CN201710332104A CN107152097B CN 107152097 B CN107152097 B CN 107152097B CN 201710332104 A CN201710332104 A CN 201710332104A CN 107152097 B CN107152097 B CN 107152097B
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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
- E04H9/027—Preventive constructional measures against earthquake damage in existing buildings
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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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/30—Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways
Abstract
The invention discloses a structure for reinforcing an externally attached prestress assembly type energy consumption frame with a cantilever plate frame, which comprises an original frame structure to be reinforced and an externally attached frame structure, wherein the externally attached frame structure comprises a prefabricated reinforced concrete beam and a prefabricated reinforced concrete column; the precast reinforced concrete beam extends outwards to form a cantilever plate; the original frame structure is provided with cantilever plates which are connected through bolts. The external frame structure not only contributes to the shock resistance of the reinforced integral structure by the shock resistance bearing capacity and the energy consumption capacity of the external frame structure, but also can improve the stress state and the deformation mode of the original frame structure, so that the structure forms a more reasonable damage yield mechanism, and the shock resistance of the original frame structure is more fully utilized.
Description
Technical Field
The invention relates to the technical field of civil engineering seismic strengthening, in particular to a structure for strengthening a frame with a cantilever plate and externally attached with a prestress assembly type energy dissipation frame.
Background
In the conventional sense, the approaches for improving the seismic capacity of a concrete frame structure can be roughly divided into three main modes, namely, improving the bearing capacity (strength type reinforcement), improving the ductility (ductility type reinforcement) and reducing the seismic force acting on the structure (energy dissipation, shock absorption and reinforcement). The bearing capacity is improved by increasing supports, increasing earthquake-resistant walls, additionally arranging external frameworks, increasing the section size of the original frame structure and the like; the ductility is improved by strengthening the ductility of the member, such as adding stirrups to the column, wrapping steel plate hoops outside, wrapping carbon fiber bundles and the like, so that the ductility of the structure is improved; the energy dissipation and shock absorption device is arranged to dissipate earthquake capacity or block earthquake energy input by arranging a damper, a shock isolation device and the like so as to reduce the influence caused by an earthquake.
The additional integral substructure reinforcement is to utilize 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 anti-seismic performance of the structure is improved, the normal use of the building structure can be uninterrupted as far as possible during the reinforcement construction, rich building effects can be created by combining the specific conditions of the building, and the method is an economic, reasonable and efficient structure system reinforcement method.
At present, most of external monkshood structure reinforcement needs cast-in-place operation of a substructure, pollution and noise are generated, and the construction period is complicated and long. In addition, there is a special connection condition for the external sub-structure reinforcement, i.e. the external balcony or external corridor overhanging board of the original frame structure, resulting in the external sub-structure not being able to be attached to the original frame structure.
Disclosure of Invention
The purpose of the invention is as follows: in order to overcome the defects in the prior art, the invention provides a structure for reinforcing an externally-attached prestress assembly type energy dissipation frame with an overhanging plate frame.
The technical scheme is as follows: in order to solve the technical problems, the structure for reinforcing the cantilever plate frame externally attached with the prestress assembly type energy consumption frame comprises an original frame structure to be reinforced and an externally attached frame structure, wherein the externally attached frame structure is a prestress assembly type structure consuming energy by friction in a node core area and comprises a prefabricated reinforced concrete beam and a prefabricated reinforced concrete column, a steel sleeve head is arranged at the end part of the prefabricated reinforced concrete beam connected with the prefabricated reinforced concrete column, a friction soft steel plate is arranged between the steel sleeve head and the prefabricated reinforced concrete column, and prestress ribs are arranged in the prefabricated reinforced concrete beam and the prefabricated reinforced concrete column; the prefabricated reinforced concrete beam extends outwards to form a cantilever plate, and a connecting hole is drilled in the cantilever plate; the original frame structure is also provided with a cantilever plate which extends outwards, a connecting hole is formed in the cantilever plate, and the cantilever plate on the precast reinforced concrete beam is connected with the cantilever plate of the original frame structure through a bolt.
The steel sleeve head is formed by welding four rectangular steel plates, the lengths of the two steel plates on two sides are larger than those of the two steel plates above and below, and the extending distance of the steel plates on two sides is half of the height of the section of the prefabricated reinforced concrete column.
Wherein, just pullover is connected through shear bolt nail with precast reinforced concrete roof beam, and precast reinforced concrete roof beam tip is equipped with the spiral stirrup, prevents that the concrete of precast reinforced concrete roof beam tip from advancing the conquassation, reinforcing tip bearing capacity.
Wherein, two friction mild steel boards are placed respectively at the internal surface of the first both sides steel sheet of just overlapping to punch at friction mild steel board, just overlap head, node core area corresponding position, through penetrating bolt, bolt both sides fastening nut will rub mild steel board, just overlap head, node core area zonulae occludens.
When the prefabricated reinforced concrete column is prefabricated, a steel bar extends outwards at one end, and a grouting sleeve or a corrugated pipe is reserved at the other end; the upper end overhanging reinforcing steel bar of the lower prefabricated reinforced concrete column is in sleeve connection or slurry anchor lap joint with the lower end grouting sleeve or corrugated pipe of the upper prefabricated reinforced concrete column.
Corrugated pipes are reserved in the prefabricated reinforced concrete beam and the prefabricated reinforced concrete column so as to stretch the prestressed tendons; and after all the external frame joints on the layer are connected, tensioning the prestressed tendons in the beam, and anchoring the prestressed tendons at the outermost beam end.
Cement mortar or epoxy mortar is poured on the joint surface of the prefabricated reinforced concrete beam and the prefabricated reinforced concrete column before the prestressed tendons in the prefabricated reinforced concrete beam and the prefabricated reinforced concrete column are tensioned, connection leveling is carried out, a node core area is protected, and meanwhile pressure loss of the prestressed tendons is reduced.
The prefabricated reinforced concrete column is additionally provided with a foundation, one end of a prestressed tendon is anchored in the foundation, the prestressed tendon penetrates through a corrugated pipe pre-embedded in the prefabricated reinforced concrete column before the prefabricated column is hoisted and connected, after all the prefabricated reinforced concrete columns are connected in an aligned mode, the prestressed tendon is tensioned, and the other end of the prestressed tendon is anchored at the top of the column.
Has the advantages that: the externally attached prestress assembly type energy dissipation frame reinforcing structure with the cantilever plate frame has the following beneficial effects:
1. the external frame structure not only contributes to the shock resistance of the reinforced integral structure by the shock resistance bearing capacity and the energy consumption capacity of the external frame structure, but also can improve the stress state and the deformation mode of the original frame structure, so that the structure forms a more reasonable damage yield mechanism, and the shock resistance of the original frame structure is more fully utilized.
2. The overhanging board of overhanging frame structure passes through bolted connection with the overhanging board of overhanging of former frame structure, and full play has the effect of the board of overhanging, reduces the wet operation in scene, improves the efficiency of construction, and reinforcement work is accomplished in the building outside, does not destroy the interior decoration of building, does not influence the inside activity of building, and the basis is established in addition to the frame that attaches outward, is equivalent to former frame construction and strides more in this direction, increases the structure usable floor area.
3. The self-resetting of the structure is realized by the bidirectional prestressed tendons in the externally attached frame structure, the residual deformation of the original frame structure is reduced, and the damage position is controlled at the steel sleeve head and the friction soft steel plate by utilizing the energy consumption of the friction rotation of the steel sleeve head and the soft steel plate in the node core area.
Drawings
FIG. 1 is a schematic view of the construction of an externally attached prefabricated frame node according to the present invention;
FIG. 2 is a detail view of the external prefabricated frame node structure according to the present invention;
FIG. 3 is a front view of the construction of an externally attached prefabricated frame node according to the present invention;
FIG. 4 is a top view of the construction of an externally attached prefabricated frame node according to the present invention;
FIG. 5 is a schematic view of a prefabricated reinforced concrete column foundation according to the present invention;
FIG. 6 is a schematic view of the externally attached prefabricated frame (with cantilever panels) of the present invention;
FIG. 7 is a schematic view of the original frame structure (with cantilever plate) of the present invention;
FIG. 8 is a schematic view of the method for connecting the external frame and the original frame according to the present invention;
FIG. 9 is a side view of the method of connecting the outer frame to the original frame according to the present invention;
FIG. 10 is a top view of the method of connecting the outer frame to the original frame according to the present invention;
FIG. 11 is a schematic view of the present invention showing the completion of the attachment of the outer frame;
FIG. 12 is a side view of the completed attachment of the outer frame of the present invention;
FIG. 13 is a top view of the completed attachment of the outer frame of the present invention;
in the figure: 1-original frame structure, 2-externally attached frame structure, 3-prefabricated reinforced concrete beam, 4-prefabricated reinforced concrete column, 5-cantilever plate, 6-cantilever plate, 7-overhanging steel bar, 9-node core region, 10-beam end weakening surface, 11-node core region weakening section, 12-steel sleeve head, 13-friction mild steel plate, 14-prestressed bar, 15-prestressed bar, 16-foundation, 17-connecting hole, 18-connecting hole, 19-steel sleeve head connecting hole, 20-mild steel plate connecting hole, 21-node core region connecting hole, 22-split bolt, 23-nut and 24-corrugated pipe.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
The invention provides a structure for reinforcing an externally attached prestress assembly type energy dissipation frame with a cantilever plate frame, which is characterized in that an externally attached frame structure 2 is connected with an original frame structure 1 by utilizing an overhanging plate 6 extending out of the original frame structure 1. The prestressed tendons 14 and 15 realize self-resetting of the structure, and the node core area 9 of the externally attached frame structure realizes energy consumption through friction.
Specifically, as shown in fig. 1 to 4, the present invention comprises an original frame structure 1 to be reinforced, an outer attached frame structure 2, and a cantilever plate 5 and a cantilever plate 6 therebetween. The externally attached frame structure 2 is a prestress assembly type structure with friction energy consumption in a node core area 9, and consists of a prefabricated reinforced concrete beam 3, a prefabricated reinforced concrete column 4, a steel sleeve head 12, a friction soft steel plate 13 and the like, a prestressed rib 14 in the prefabricated reinforced concrete beam 3 is tensioned after assembly is finished, and a node has no post-cast section. The prefabricated reinforced concrete columns 4 are connected in the middle of the floor, and prestressed tendons 15 penetrate through the prefabricated reinforced concrete columns.
The steel sleeve head 12 is formed by welding four rectangular steel plates, and the lengths of the two steel plates at two sides are greater than the lengths of the steel plates at the upper and lower surfaces; the end of the precast reinforced concrete girder 3 is partially weakened to fit over the steel casing head 12. Before the external frame beam 3 is hoisted, the steel sleeve head 12 and the beam end weakening surface 10 are connected through shear resistant studs; 3 tip of prefabricated reinforced concrete roof beam are equipped with the spiral stirrup, prevent beam-ends concrete and carry forward the conquassation, further strengthen 3 tip bearing capacity of prefabricated reinforced concrete roof beam.
The node core area 9 is locally weakened and is embedded into a friction mild steel plate 13; the outer side of the friction mild steel plate 13 is connected with a steel plate extending out of the steel sleeve head 12, and the outer surface of the steel sleeve head 12 and the side surface of the precast reinforced concrete beam 3 are on the same plane. And steel sleeve head connecting holes 19, mild steel plate connecting holes 20 and node core area connecting holes 21 are drilled at corresponding positions of the steel sleeve head 12, the friction mild steel plate 13 and the node core area 9, and through connection of the holes is ensured. And (4) penetrating a split bolt 22 and fastening a nut 23 to tightly connect the steel sleeve head 12, the friction mild steel plate 13 and the node core area 9.
When the prefabricated reinforced concrete column 4 is prefabricated, a reinforcing steel bar 7 extends outwards from one end, and a hole is reserved in the other end; and the overhanging steel bars 7 at the upper end of the lower-layer column are in sleeve connection or slurry anchor lap joint with the reserved holes at the lower end of the upper-layer column.
As shown in fig. 5, the prefabricated reinforced concrete column 4 is additionally provided with a foundation 16, one end of the prestressed reinforcement 15 in the column is anchored in the foundation 16, before the prefabricated column 4 is hoisted and connected, the prestressed reinforcement 15 penetrates through the pre-embedded corrugated pipe 24 in the column, after all the prefabricated reinforced concrete columns 4 are connected in the opposite position, the prestressed reinforcement 15 in the column is tensioned, and the other end of the prestressed reinforcement 15 is anchored at the top of the column.
As shown in fig. 6 to 13, the cantilever plate 5 extends outwards from the external frame structure 2, the cantilever plate 5 is prefabricated together with the prefabricated reinforced concrete beam 3, and a connecting hole 17 is drilled in the cantilever plate 5; the connection surface of the cantilever plate 5 and the prefabricated reinforced concrete beam is below the central line of the side surface of the prefabricated reinforced concrete beam, and the cantilever plate 5 does not pass through the beam end weakening surface 10 of the prefabricated reinforced concrete beam. Connecting holes 18 are drilled on the overhanging board 6 of the original structure, the positions of the connecting holes 18 correspond to the positions of the connecting holes 17 of the overhanging board 5 of the external attached frame, and the overhanging board is connected through split bolts 22. The connecting holes 17 and 18 should avoid the longitudinal ribs and the structural ribs inside the cantilever plate 5 and 6.
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 a board frame of encorbelmenting attaches reinforced (rfd) structure of prestressing force assembled power consumption frame outward, includes the former frame construction and the outer frame construction that attach of treating the reinforcement, its characterized in that: the externally attached frame structure is a prestress assembly type structure with friction energy consumption in a node core area and comprises a prefabricated reinforced concrete beam and a prefabricated reinforced concrete column, a steel sleeve head is arranged at the end part of the prefabricated reinforced concrete beam connected with the prefabricated reinforced concrete column, the steel sleeve head is formed by welding four rectangular steel plates, the length of the two steel plates on two sides is greater than that of the two steel plates on the upper side and the lower side, and the extending distance of the two steel plates on the two sides is half of the section height of the prefabricated reinforced concrete column; the steel sleeve head is connected with the prefabricated reinforced concrete beam through the shear resistant studs, and the end part of the prefabricated reinforced concrete beam is provided with the spiral stirrup, so that concrete at the end part of the prefabricated reinforced concrete beam is prevented from being crushed in advance, and the bearing capacity of the end part is enhanced; friction soft steel plates are arranged between the steel sleeve head and the prefabricated reinforced concrete column, the two friction soft steel plates are respectively placed on the inner surfaces of the steel plates on the two sides of the steel sleeve head, holes are formed in corresponding positions of the friction soft steel plates, the steel sleeve head and the node core area, and the friction soft steel plates, the steel sleeve head and the node core area are tightly connected through penetrating bolts and fastening nuts on the two sides of the bolts; prestressed tendons are arranged in the prefabricated reinforced concrete beam and the prefabricated reinforced concrete column; the prefabricated reinforced concrete beam extends outwards to form a cantilever plate, and a connecting hole is drilled in the cantilever plate; the original frame structure is also provided with a cantilever plate which extends outwards, a connecting hole is formed in the cantilever plate, and the cantilever plate on the precast reinforced concrete beam is connected with the cantilever plate of the original frame structure through a bolt.
2. The structure for reinforcing the externally-attached pre-stressed assembled energy dissipation frame with the cantilever plate frame as claimed in claim 1, wherein: when the prefabricated reinforced concrete column is prefabricated, one end of the prefabricated reinforced concrete column extends outwards to form a reinforcing steel bar, and a grouting sleeve or a corrugated pipe is reserved at the other end of the prefabricated reinforced concrete column; the upper end overhanging steel bar of the lower prefabricated reinforced concrete column is in sleeve connection or slurry anchor lap joint with the lower end grouting sleeve or corrugated pipe of the upper prefabricated reinforced concrete column.
3. The structure for reinforcing a frame with cantilever plates and externally attached prestress assembly type energy consumption frame as claimed in claim 1, wherein: corrugated pipes are reserved in the prefabricated reinforced concrete beam and the prefabricated reinforced concrete column so as to stretch the prestressed tendons; and after all the external frame joints on the layer are connected, tensioning the prestressed tendons in the beam, and anchoring the prestressed tendons at the outermost beam end.
4. The structure for reinforcing the externally-attached pre-stressed assembled energy dissipation frame with the cantilever plate frame as claimed in claim 3, wherein: before the prestressed tendons in the prefabricated reinforced concrete beam and the prefabricated reinforced concrete column are tensioned, cement mortar or epoxy mortar is poured on the joint surface of the prefabricated reinforced concrete beam and the prefabricated reinforced concrete column, connection leveling is carried out, the core area of the node is protected, and meanwhile, the pressure loss of the prestressed tendons is reduced.
5. The structure for reinforcing a frame with cantilever plates and externally attached prestress assembly type energy consumption frame as claimed in claim 1, wherein: the prefabricated reinforced concrete column is additionally provided with a foundation, one end of a prestressed tendon is anchored in the foundation, the prestressed tendon penetrates through a corrugated pipe pre-embedded in the prefabricated reinforced concrete column before the prefabricated column is hoisted and connected, after all the prefabricated reinforced concrete columns are connected in an aligned mode, the prestressed tendon is stretched, and the other end of the prestressed tendon is anchored at the top of the column.
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| CN201710332104.6A CN107152097B (en) | 2017-05-12 | 2017-05-12 | External prestress assembly type energy dissipation frame reinforcing structure with cantilever plate frame |
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| CN201710332104.6A CN107152097B (en) | 2017-05-12 | 2017-05-12 | External prestress assembly type energy dissipation frame reinforcing structure with cantilever plate frame |
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| CN107152097B true CN107152097B (en) | 2022-08-26 |
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| CN107761982A (en) * | 2017-10-22 | 2018-03-06 | 潍坊科技学院 | A kind of construction method of the external series connection buckling-resistant support structure of assembled |
| CN108166640B (en) * | 2017-11-22 | 2021-08-24 | 东南大学 | Structure for reinforcing original frame by assembled additional elevator shaft cylinder body substructure |
| CN108277880A (en) * | 2018-01-24 | 2018-07-13 | 南京工业大学 | A kind of follow-on automatic control energy consumption unbonded prestressed reinforced concrete frame |
| CN108755946B (en) * | 2018-07-10 | 2023-08-11 | 福州大学 | Partially prefabricated bolt connection assembly type beam column node structure and construction method thereof |
| CN109296065A (en) * | 2018-11-22 | 2019-02-01 | 海南大学 | A kind of prefabricated PC reinforced concrete frame structure |
| CN109916584B (en) * | 2019-03-25 | 2021-08-13 | 长安大学 | Substructure test method based on interaction of soil-structure-energy dissipation and shock absorption device |
| KR102093322B1 (en) * | 2019-07-15 | 2020-03-26 | 단국대학교 산학협력단 | Buttress assembly for seismic reinforcing of building having non-bearing walls |
| CN110485563B (en) * | 2019-09-17 | 2024-04-23 | 扬州大学 | Post-tensioning method prestress assembly type concrete frame beam column dry type connection node |
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| DE102004048969B3 (en) * | 2004-10-07 | 2006-05-18 | Kröger, Claus | Mounting system for constructions projecting from building structures |
| JP5779119B2 (en) * | 2012-02-20 | 2015-09-16 | 大成建設株式会社 | Composite beam and frame with composite beam |
| CN103741958B (en) * | 2013-12-30 | 2016-07-06 | 北京工业大学 | A kind of peripheral hardware assembled minor structure reinforces the method for existing building |
| CN103711330B (en) * | 2013-12-30 | 2016-01-20 | 北京工业大学 | A kind of prestressing force assembling precast reinforced concrete frame reinforces the method for existing structure |
| CN103758208B (en) * | 2014-02-18 | 2016-07-06 | 沈阳远大科技园有限公司 | Assembled integral composite frame structure |
| CN104032840B (en) * | 2014-07-03 | 2016-03-23 | 华北理工大学 | The prestressing force assembling frame node connecting structure of additional angle steel |
| CN204326499U (en) * | 2014-12-10 | 2015-05-13 | 中国建筑第六工程局有限公司 | A kind of attachment anchor device for building operations elevator |
| CN105220891A (en) * | 2015-09-21 | 2016-01-06 | 华东交通大学 | A kind of reinforced concrete frame seismic reinforcing structure and Shockproof reinforcing method thereof |
| CN206941858U (en) * | 2017-05-12 | 2018-01-30 | 东南大学 | Band is encorbelmented the structure of attached prestressing force assembled power consumption frame strengthening outside plate framework |
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