CN107152097A - Band attached prestressing force assembled outside plate framework of encorbelmenting consumes energy the structure of frame strengthening - Google Patents

Band attached prestressing force assembled outside plate framework of encorbelmenting consumes energy the structure of frame strengthening Download PDF

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Publication number
CN107152097A
CN107152097A CN201710332104.6A CN201710332104A CN107152097A CN 107152097 A CN107152097 A CN 107152097A CN 201710332104 A CN201710332104 A CN 201710332104A CN 107152097 A CN107152097 A CN 107152097A
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CN
China
Prior art keywords
reinforced concrete
frame
attached
steel
concrete column
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CN201710332104.6A
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Chinese (zh)
Inventor
曹徐阳
吴刚
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Southeast University
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Southeast University
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Priority to CN201710332104.6A priority Critical patent/CN107152097A/en
Publication of CN107152097A publication Critical patent/CN107152097A/en
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    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04GSCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G23/00Working measures on existing buildings
    • E04G23/02Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04HBUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H9/00Buildings, or groups of buildings, or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake, extreme climate
    • E04H9/02Buildings, or groups of buildings, or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake, extreme climate withstanding earthquake or sinking of ground
    • E04H9/027Preventive constructional measures against earthquake damage in existing buildings

Abstract

Consumed energy the structure of frame strengthening the invention discloses a kind of band attached prestressing force assembled outside plate framework of encorbelmenting, including former frame structure to be reinforced and outer attached frame structure, outer attached frame structure includes precast reinforced concrete beam and prefabricated reinforced concrete column, the end that precast reinforced concrete beam is connected with prefabricated reinforced concrete column sets steel bushing head, friction mild steel plate is set between steel bushing head and prefabricated reinforced concrete column, and precast reinforced concrete beam in prefabricated reinforced concrete column with being respectively provided with presstressed reinforcing steel;Precast reinforced concrete beam is outward extended with cantilevered plate;There is cantilevered plate in former frame structure, each cantilevered plate is bolted.The integrally-built shock resistance that outer attached frame structure of the invention is not only contributed to after reinforcing with the seismic bearing capacity and energy dissipation capacity of its own, the stress and deformation pattern of former frame structure can also be improved, structure formation is set more reasonably to damage surrender mechanism, so that the shock resistance of former frame structure is more fully utilized.

Description

Band attached prestressing force assembled outside plate framework of encorbelmenting consumes energy the structure of frame strengthening
Technical field
The present invention relates to civil engineering technical field of anti-seismic reinforcement, specifically a kind of band is encorbelmented attached prestressing force dress outside plate framework Structure with formula power consumption frame strengthening.
Background technology
From froming the perspective of in traditional sense, the approach for improving the shock resistance of concrete frame structure is broadly divided into raising carrying energy The seismic force (energy-dissipating and shock-absorbing reinforcing) three that power (intensity type reinforcing), raising ductility (reinforcing of ductility type), reduction are acted in structure Plant major way.It is to be supported by increase, increase seismic structural wall, earthquake resistant wall, set up outside framework, increase former frame structure to improve bearing capacity The modes such as sectional dimension, improve the shock resistance of structure;It is by carrying out ductility reinforcing to component, such as to post increase to improve ductility The modes such as stirrup, encased steel plate hoop, carbon fiber confinement improve component ductility to improve the ductility of structure;Energy-dissipating and shock-absorbing is set to fill Put, be by setting the dissipation such as damper, earthquake isolating equipment tectonic comparison or cut-off seismic energy input, being caused with mitigating earthquake Influence.
Additional overall minor structure reinforce be exactly the additional overall minor structure of utilization and original structure collaborative work, not only can be with Be effectively improved the overall stress of structure, improve the anti-seismic performance of structure, and during strengthening construction can as far as possible not in The normal of disconnected building structure is used, and the concrete condition that can be combined with building creates abundant architectural effect, be it is a kind of it is economical, Rationally, efficient structural system reinforcement means.
Most outer monkshood structural strengthenings need to carry out the cast-in-place operation of minor structure at present, can produce pollution and noise, and apply The work cycle is numerous and diverse very long.In addition, there is a kind of special connection in outer monkshood structural strengthening, i.e. the overhanging balcony of former frame structure Or outside corridor cantilevered plate, cause outer monkshood structure can not be fitted with former frame structure.
The content of the invention
Goal of the invention:In order to overcome the deficiencies in the prior art, the present invention provide a kind of band encorbelment it is attached outside plate framework The structure of prestressing force assembled power consumption frame strengthening.
Technical scheme:The attached prestressing force assembled outside plate framework in order to solve the above technical problems, a kind of band of the present invention is encorbelmented The structure of power consumption frame strengthening, including former frame structure and outer attached frame structure to be reinforced, outer attached frame structure is node The prestressing force fabricated construction of core space friction energy-dissipating, it includes precast reinforced concrete beam and prefabricated reinforced concrete column, in advance The end that reinforced beam processed is connected with prefabricated reinforced concrete column sets steel bushing head, steel bushing head and prefabricated reinforced concrete column Between set in friction mild steel plate, precast reinforced concrete beam and prefabricated reinforced concrete column and be respectively provided with presstressed reinforcing steel;Pre-manufactured steel Concrete Beam Reinforced is outward extended with cantilevered plate, and connecting hole is beaten on cantilevered plate;Cantilevered plate is also outward extended with former frame structure, And the cantilevered plate beaten on cantilevered plate on connecting hole, precast reinforced concrete beam and the cantilevered plate of former frame structure are connected by bolt Connect.
Wherein, firm pullover is welded by four pieces of rectangular steel plates, above and below two pieces of steel plate lengths of both sides are more than Two blocks of steel plates, both sides steel plate outreach is the half of prefabricated reinforced concrete column depth of section.
Wherein, firm pullover is attached with precast reinforced concrete beam by shear stud, precast reinforced concrete beam end Portion is provided with tie hoop, prevents the concrete conquassation in advance of precast reinforced concrete beam end, strengthens end bearing power.
Wherein, two pieces of friction mild steel plates are individually positioned in the inner surface of firm pullover both sides steel plate, and friction mild steel plate, Firm pullover, the punching of joint cores correspondence position, will friction mild steel plate, just set by penetrating bolt, bolt both sides fastening nut Head, joint cores are closely connected.
Wherein, prefabricated reinforced concrete column one end protruding bar when prefabricated, the other end leaves grout sleeve or ripple Pipe;The upper end protruding bar of lower floor's prefabricated reinforced concrete column and the lower end grout sleeve of upper strata prefabricated reinforced concrete column or Bellows carries out sleeve connection or slurry anchor overlap joint.
Wherein, precast reinforced concrete beam, bellows is reserved in prefabricated reinforced concrete column, so as to stretch-draw prestressing force Muscle;After the completion of this layer of all outer attached frame joint connection, presstressed reinforcing steel in tensioning beam, and in outermost beam anchor.
Wherein, before the presstressed reinforcing steel in tensioning precast reinforced concrete beam and prefabricated reinforced concrete column, precast reinforced Joints cement mortar or epoxy resin mortar on the faying face of beams of concrete and prefabricated reinforced concrete column, connect levelling, protect node Core space, while reducing the pressure loss of presstressed reinforcing steel.
Wherein, prefabricated reinforced concrete column separately sets basis, and presstressed reinforcing steel one end therein is first anchored in basis, prefabricated Before post lifting, connection, presstressed reinforcing steel is first passed through into pre-buried bellows in prefabricated reinforced concrete column, treats all precast reinforced After concrete column contraposition connection, tensioning presstressed reinforcing steel therein, and the other end of presstressed reinforcing steel is anchored at capital.
Beneficial effect:A kind of band of the present invention attached prestressing force assembled outside plate framework of encorbelmenting consumes energy the structure of frame strengthening, Have the advantages that:
1st, the entirety that outer attached frame structure is not only contributed to after reinforcing with the seismic bearing capacity and energy dissipation capacity of its own The shock resistance of structure, can also improve the stress and deformation pattern of former frame structure, structure formation is more reasonably damaged Surrender mechanism, so that the shock resistance of former frame structure is more fully utilized.
2nd, the outer overhanging cantilevered plate of attached frame structure is bolted with the former overhanging cantilevered plate of frame structure, is given full play to The effect of cantilevered plate, reduces situ wet operation, improves efficiency of construction, and reinforcement is completed outside building, and building is not destroyed The inside fitting of thing, interior of building activity is not influenceed, outer auxiliary frame frame separately sets basis, many in the direction equivalent to former frame structure Go out one across increase structure usable floor area.
3rd, the two dimension prestressing muscle in outer attached frame structure realizes the Self-resetting of structure, reduces former frame structure residual in itself Remaining deformation, and steel bushing head and the frictional rotation consumed energy of mild steel plate using joint cores, by damage position control in steel Pullover and friction mild steel plate.
Brief description of the drawings
Fig. 1 is the attached precast frame joint structure schematic diagram in present invention China and foreign countries;
Fig. 2 is the attached precast frame joint structure detail drawing in present invention China and foreign countries;
Fig. 3 is the attached precast frame joint structure front view in present invention China and foreign countries;
Fig. 4 is the attached precast frame joint structure top view in present invention China and foreign countries;
Fig. 5 is the basic drawing of prefabricated reinforced concrete column in the present invention;
Fig. 6 is the attached precast frame schematic diagram in present invention China and foreign countries (band cantilevered plate);
Fig. 7 is Central Plains circuit theory schematic diagram of the present invention (band cantilevered plate);
Fig. 8 is auxiliary frame frame in China and foreign countries' of the present invention and former framework connection method schematic diagram;
Fig. 9 is auxiliary frame frame in China and foreign countries' of the present invention and former framework connection method side view;
Figure 10 is auxiliary frame frame in China and foreign countries' of the present invention and former framework connection method top view;
Figure 11 is that auxiliary frame frame in China and foreign countries' of the present invention connection completes schematic diagram;
Figure 12 is that auxiliary frame frame in China and foreign countries' of the present invention connection completes side view;
Figure 13 is that auxiliary frame frame in China and foreign countries' of the present invention connection completes top view;
In figure:Attached frame structure, 3- precast reinforced concrete beams, 4- prefabricated reinforced concretes outside 1- original frame structures, 2- Post, 5- cantilevered plates, 6- cantilevered plates, 7- protruding bars, 9- joint cores, 10- beam-ends weakens face, and 11- joint cores weaken Section, 12- steel bushing heads, 13- friction mild steel plates, 14- presstressed reinforcing steels, 15- presstressed reinforcing steels, 16- bases, 17- connecting holes, 18- connects Connect hole, 19- steel bushing head connecting holes, 20- mild steel plate connecting holes, 21- joint cores connecting hole, 22- split bolts, 23- nuts, 24- bellowss.
Embodiment
The present invention is further described below in conjunction with the accompanying drawings.
Consumed energy the structure of frame strengthening the invention provides a kind of band attached prestressing force assembled outside plate framework of encorbelmenting, utilize original Overhanging cantilevered plate 6 in frame structure 1, outer attached frame structure 2 is connected with former frame structure 1.Presstressed reinforcing steel 14, presstressed reinforcing steel 15 realize structure Self-resetting, and power consumption is realized in the friction of joint cores 9 of outer attached frame structure.
Specifically, as Figure 1-4, the present invention includes former frame structure 1 to be reinforced, outer attached frame structure 2 and two Cantilevered plate 5 and cantilevered plate 6 between person.Outer attached frame structure 2 is the prestressing force assembled knot of the friction energy-dissipating of joint cores 9 Structure, is made up of precast reinforced concrete beam 3, prefabricated reinforced concrete column 4, steel bushing first 12, friction mild steel plate 13 etc., and in assembling Presstressed reinforcing steel 14 in post-stretching precast reinforced concrete beam 3 is completed, node pours section without after.Prefabricated reinforced concrete column 4 is in floor Middle part is attached, wherein being installed with presstressed reinforcing steel 15.
Steel bushing first 12 is welded by four pieces of rectangular steel plates, and two pieces of steel plate lengths of both sides are long more than the steel plate of upper and lower surface Degree;The end of precast reinforced concrete beam 3 locally weakens, to put steel bushing first 12.Outer auxiliary frame sets a roof beam in place 3 before lifting, by steel bushing First 12 weaken face 10 with beam-ends is attached by shear stud;The end of precast reinforced concrete beam 3 is provided with tie hoop, prevents Beam-ends concrete shifts to an earlier date conquassation, further enhances the end bearing power of precast reinforced concrete beam 3.
Joint cores 9 are local to be weakened, and embedded friction mild steel plate 13;The outside of friction mild steel plate 13 is overhanging with steel bushing first 12 Steel plate be connected, first 12 outer surface of steel bushing and the side of precast reinforced concrete beam 3 are in same plane.Steel bushing first 12, friction mild steel Plate 13, the correspondence position of joint cores 9 beat steel bushing head connecting hole 19, mild steel plate connecting hole 20, joint cores connecting hole 21, and Ensure hole insertion connection.Split bolt 22 and fastening nut 23 are penetrated, by steel bushing first 12, friction mild steel plate 13, joint cores 9 Close connection.
Prefabricated reinforced concrete column 4 one end protruding bar 7, other end reserving hole when prefabricated;Lower floor's post upper end is overhanging Reinforcing bar 7 and the reserving hole of upper strata post lower end carry out sleeve connection or slurry anchor overlap joint.
Bellows 24 is reserved in precast reinforced concrete beam 3, prefabricated reinforced concrete column 4, so as to tensioned prestressing bar 14th, presstressed reinforcing steel 15.After the completion of this layer of all outer attached joint cores 9 of frame structure 2 connection, presstressed reinforcing steel in tensioning beam 14, and in outermost beam anchor;Before tensioned prestressing bar 14, joints cement mortar or epoxy resin mortar on beam column faying face, Connection is levelling, protects joint cores 9, while reducing the pressure loss of presstressed reinforcing steel 14.
As shown in figure 5, prefabricated reinforced concrete column 4, which separately sets one end of presstressed reinforcing steel 15 in basis 16, post, is first anchored at basis In 16, before prefabricated post 4 is lifted, connected, presstressed reinforcing steel 15 is first passed through into pre-buried bellows 24 in post, treats all precast reinforced After the contraposition connection of concrete column 4, presstressed reinforcing steel 15 in tensioning post, and the other end of presstressed reinforcing steel 15 is anchored at capital.
As shown in figs. 6-13, the overhanging cantilevered plate 5 of outer attached frame structure 2, cantilevered plate 5 is together with precast reinforced concrete beam 3 It is prefabricated, and beat on cantilevered plate 5 connecting hole 17;The joint face of cantilevered plate 5 and precast reinforced concrete beam is in precast reinforced coagulation Below native beam sides center line, cantilevered plate 5 weakens face 10 without the beam-ends of precast reinforced concrete beam.Encorbelment original structure is overhanging 6 dozens of connecting holes 18 of plate, the position of connecting hole 18 is corresponding with the position of connecting hole 17 of the overhanging cantilevered plate 5 of outer auxiliary frame frame, and by right Bolt 22 is drawn to connect.Connecting hole 17, connecting hole 18 should avoid cantilevered plate 5, the vertical muscle inside cantilevered plate 6 and construction muscle.
Described above is only the preferred embodiment of the present invention, it should be pointed out that:For the ordinary skill people of the art For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should It is considered as protection scope of the present invention.

Claims (8)

1. a kind of band is encorbelmented, attached prestressing force assembled consumes energy the structure of frame strengthening, including former framework knot to be reinforced outside plate framework Structure and outer attached frame structure, it is characterised in that:Outer attached frame structure is the prestressing force assembled of joint cores friction energy-dissipating Structure, it includes precast reinforced concrete beam and prefabricated reinforced concrete column, precast reinforced concrete beam and precast reinforced coagulation The end of earth pillar connection sets steel bushing head, and friction mild steel plate is set between steel bushing head and prefabricated reinforced concrete column, precast reinforced Beams of concrete in prefabricated reinforced concrete column with being respectively provided with presstressed reinforcing steel;Precast reinforced concrete beam is outward extended with cantilevered plate, Connecting hole is beaten on cantilevered plate;Also cantilevered plate is outward extended with former frame structure, and beats on cantilevered plate connecting hole, pre-manufactured steel Cantilevered plate and the cantilevered plate of former frame structure on Concrete Beam Reinforced are bolted.
2. a kind of band according to claim 1 is encorbelmented, attached prestressing force assembled consumes energy the structure of frame strengthening outside plate framework, It is characterized in that:Firm pullover is welded by four pieces of rectangular steel plates, two pieces of steel plate lengths of both sides be more than above and below two Block steel plate, both sides steel plate outreach is the half of prefabricated reinforced concrete column depth of section.
3. a kind of band according to claim 2 is encorbelmented, attached prestressing force assembled consumes energy the structure of frame strengthening outside plate framework, It is characterized in that:Firm pullover is attached with precast reinforced concrete beam by shear stud, precast reinforced concrete beam end Provided with tie hoop, the concrete conquassation in advance of precast reinforced concrete beam end is prevented, strengthens end bearing power.
4. a kind of band according to claim 2 is encorbelmented, attached prestressing force assembled consumes energy the structure of frame strengthening outside plate framework, It is characterized in that:Two pieces of friction mild steel plates are individually positioned in the inner surface of firm pullover both sides steel plate, and in friction mild steel plate, just Pullover, joint cores correspondence position punching, by penetrate bolt, bolt both sides fastening nut will rub mild steel plate, firm pullover, Joint cores are closely connected.
5. a kind of band according to claim 1 is encorbelmented, attached prestressing force assembled consumes energy the structure of frame strengthening outside plate framework, It is characterized in that:Prefabricated reinforced concrete column one end protruding bar when prefabricated, the other end leaves grout sleeve or bellows; The upper end protruding bar of lower floor's prefabricated reinforced concrete column and the lower end grout sleeve of upper strata prefabricated reinforced concrete column or ripple Line pipe carries out sleeve connection or slurry anchor overlap joint.
6. a kind of band according to claim 1 is encorbelmented, attached prestressing force assembled consumes energy the structure of frame strengthening outside plate framework, It is characterized in that:Bellows is reserved in precast reinforced concrete beam, prefabricated reinforced concrete column, so as to tensioned prestressing bar; After the completion of this layer of all outer attached frame joint connection, presstressed reinforcing steel in tensioning beam, and in outermost beam anchor.
7. a kind of band according to claim 6 is encorbelmented, attached prestressing force assembled consumes energy the structure of frame strengthening outside plate framework, It is characterized in that:Before presstressed reinforcing steel in tensioning precast reinforced concrete beam and prefabricated reinforced concrete column, precast reinforced mixed Joints cement mortar or epoxy resin mortar on solidifying Tu Liang and prefabricated reinforced concrete column faying face, connect levelling, protect node core Heart district, while reducing the pressure loss of presstressed reinforcing steel.
8. a kind of band according to claim 1 is encorbelmented, attached prestressing force assembled consumes energy the structure of frame strengthening outside plate framework, It is characterized in that:Prefabricated reinforced concrete column separately sets basis, and presstressed reinforcing steel one end therein is first anchored in basis, in prefabricated post Before lifting, connection, presstressed reinforcing steel is first passed through into pre-buried bellows in prefabricated reinforced concrete column, treats all precast reinforced mixed After solidifying earth pillar contraposition connection, tensioning presstressed reinforcing steel therein, and the other end of presstressed reinforcing steel is anchored at capital.
CN201710332104.6A 2017-05-12 2017-05-12 Band attached prestressing force assembled outside plate framework of encorbelmenting consumes energy the structure of frame strengthening Pending CN107152097A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
CN108166640A (en) * 2017-11-22 2018-06-15 东南大学 Assembled adds the structure that elevator cylinder minor structure reinforces former frame
CN109916584A (en) * 2019-03-25 2019-06-21 长安大学 Based on soil-structure-energy-consuming shock absorber interaction sub-structural test method
US11105111B2 (en) * 2019-07-15 2021-08-31 Industry-Academic Cooperation Foundation, Dankook University Buttress assembly for seismic reinforcing of building having non-bearing walls

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
CN108166640A (en) * 2017-11-22 2018-06-15 东南大学 Assembled adds the structure that elevator cylinder minor structure reinforces former frame
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
CN109916584A (en) * 2019-03-25 2019-06-21 长安大学 Based on soil-structure-energy-consuming shock absorber interaction sub-structural test method
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
US11105111B2 (en) * 2019-07-15 2021-08-31 Industry-Academic Cooperation Foundation, Dankook University Buttress assembly for seismic reinforcing of building having non-bearing walls

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