CN103835522B - Short wall support energy consumption damping reinforcement structure and construction technology - Google Patents

Short wall support energy consumption damping reinforcement structure and construction technology Download PDF

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Publication number
CN103835522B
CN103835522B CN201410072375.9A CN201410072375A CN103835522B CN 103835522 B CN103835522 B CN 103835522B CN 201410072375 A CN201410072375 A CN 201410072375A CN 103835522 B CN103835522 B CN 103835522B
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damper
short wall
steel
mild steel
energy consumption
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CN103835522A (en
Inventor
胡新锋
蒋相阳
王小燕
蒋咏铙
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Zhejiang Haitian Construction Group Co Ltd
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Zhejiang Haitian Construction Group Co Ltd
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Abstract

The invention discloses a kind of short wall support energy consumption damping reinforcement structure, comprise mild steel damper, described mild steel damper is arranged between structural beams and the short wall of steel concrete, described mild steel damper and the fixing of structural beams adopt bar planting formula anchorage style to carry out the fixing of damper side plate with high-strength to wearing bolt, and described mild steel damper base plate is connected with the short wall pre-embedded bolt of steel concrete.The invention also discloses a kind of short wall support energy consumption damping reinforcement construction method.Short wall support energy consumption damping reinforcement structure is adopted to reduce total cost, possess that the duration is flexible, engineering quantity is little, technology is reasonable, safe and reliable, do not affect the advantages such as the usage space of building, short wall support energy consumption damping reinforcement construction method, there is technique simple, be easy to operation, make full use of fast hard, early strong, ungauged regions, good fluidity the feature of pea gravel concreten grout mix, can the construction period be shortened, promote economic benefit.

Description

Short wall support energy consumption damping reinforcement structure and construction technology
Technical field
The present invention relates to short wall support energy consumption damping reinforcement structure and construction technology.
Background technology
Usually the seismic strengthening technology adding the rigidity of macrostructure own is adopted in prior art, as Enlargement of Section, additional steel reinforcing method, reinforcement by sticking of sheets, sticky CFRP Sheet Strengthening Method, reinforcing steel net shell method, reinforcing bar board wall reinforcing method, its engineering quantity is large, and complicated construction technique, cost is higher.
Summary of the invention
Technical problem to be solved by this invention is just to provide a kind of short wall support energy consumption damping reinforcement structure and construction technology, and engineering quantity is little, easy construction, fall cost, safe and reliable.
For solving the problems of the technologies described above, the present invention adopts following technical scheme: short wall support energy consumption damping reinforcement structure, comprising mild steel damper is arranged between structural beams and the short wall of steel concrete, mild steel damper and the fixing of structural beams adopt bar planting formula anchorage style to carry out the fixing of damper side plate with high-strength to wearing bolt, and damper base plate pre-embedded bolt is connected with the short wall of steel concrete.
Short wall support energy consumption damping reinforcement structure construction technique, comprises the steps:
Step one, surveying setting-out;
Step 2, local reinforcement is reinforced, and carries out steel bonding or carbon cloth reinforcing to the construction part of structural beams;
Step 3, floor concrete cuts, and to flooring short wall Construction of Supporting, place carries out cutting of concrete surface layer;
Step 4, the short wall reinforcing steel implant of steel concrete;
Step 5, installs mild steel damper;
Step 6, the short wall form of steel concrete is installed;
Step 7, the grouting of short wall note;
Step 8, short wall form removes maintenance.
Preferably, the concrete technology installing mild steel damper is:
1) on request the position of installing damper is positioned, hole on beam according to position, damper side plate bolt hole, adopt M12 high-strength to wearing bolt, and adopt bar planting formula anchorage style to carry out the fixing of damper side plate according to spiro keyhole position, structure glue should be adopted before construction completely to stick on side plate;
2) utilize the operation platform that activity gate-type scaffold building one is parallel with damper short wall knee wall top, operation platform is that both sides are set up;
3) be fixed at floor subdrilling hole, upper strata expansion bolt the otic placode hanging jack suspension hook, jack is suspended on otic placode, jack is pulled damper to be promoted to more than the short wall top of damper, steel bridging piece is placed between the operation platform of both sides, then on damper, the rope made of hemp is fastened, with manually promoting damper, damper is pulled with lineup at the other end, until damper is pushed under beam, left and right and front and back arrange the jack of rear dismounting damper lifting in place all between two parties, with jack by damper jack-up and upper side panel close contact, then spot welding is by damper fixation, start welding,
4) answer two ends to carry out during damper welding simultaneously, and block mild steel steel plate in damper with slim little steel plate as baffle plate, avoid causing the mild steel steel plate of damper impaired during welding, adopt intermittent weld layering welding during welding, often disconnected fusion length controls at 100mm, and indwelling 150mm does not weld in the middle part of steel plate, top and side plate are welded and fixed, below on damper base plate illustratively specification package bolt, pre-buried enter within the walls short, being convenient to after maintenance.
Preferably, the grouting of short wall note adopts " deadweight method " to pour into, pour into from side till opposite side overflows, after grouting starts, carry out continuously, carry out pulling water conservancy diversion with bamboo lath in filling process, and outside template, adopt hammer to knock gently, promote that slurry falls and air discharge within the walls, guarantees the compactness of grout blanket.
This short wall support energy consumption damping reinforcement structure, is utilize to install mild steel damper at the suitable position of structure, and adopts the short wall of steel concrete as the novel system supported.This technology has more unique superiority than adopting viscous damper bracing members reinforcement system, with existing traditional seismic strengthening technology (Enlargement of Section adding the rigidity of macrostructure own, additional steel reinforcing method, reinforcement by sticking of sheets, sticky CFRP Sheet Strengthening Method, reinforcing steel net shell method, reinforcing bar board wall reinforcing method) compare, adopt short wall support energy consumption damping reinforcement structure can reduce the total cost of 20% ~ 30%, but also it is flexible to possess the duration, engineering quantity is little, technology is reasonable, safe and reliable, do not affect the advantages such as the usage space of building, this is that conventional method cannot realize.
This short wall support energy consumption damping reinforcement construction method is compared with existing traditional seismic strengthening technology and buckling-restrained brace system, utilize the short wall of concrete as support system, need not reinforce beam, Column border node Baogang cover, than bracing members system saving construction cost about about 50%, and the support of concrete short wall takes up room little, therefore has more economy, practicality than bracing members system.
It is simple that the construction of this engineering method has technique, is easy to operation, makes full use of fast hard, early strong, ungauged regions, good fluidity the feature of pea gravel concreten grout mix, can shorten the construction period, promote economic benefit.
This engineering method can, under the prerequisite keeping original building appearance constant, realize improving shock resistance and improving using function, and simple structure, damping effect be reliable.If damper has damaged in earthquake, as long as the damper so more renewed after earthquake, structure just again possessed with earthquake before suitable shock resistance, recoverability is high.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the invention will be further described:
Fig. 1 is front view of the present invention.
In figure, 1: mild steel damper; 101: damper side plate; 2: structural beams; 3: the short wall of steel concrete; 4: Reinforced Concrete Structure post.
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is elaborated.
As shown in Figure 1, short wall support energy consumption damping reinforcement structure, comprise mild steel damper, described mild steel damper is arranged between structural beams and the short wall of steel concrete, described mild steel damper and the fixing of structural beams adopt bar planting formula anchorage style to carry out the fixing of damper side plate with high-strength to wearing bolt, and described mild steel damper base plate is connected with the short wall pre-embedded bolt of steel concrete.
Short wall support energy consumption damping reinforcement structure construction technique, comprises the steps:
Step one, surveying setting-out;
Step 2, local reinforcement is reinforced, and carries out steel bonding or carbon cloth reinforcing to the construction part of structural beams;
Step 3, floor concrete cuts, and to flooring short wall Construction of Supporting, place carries out cutting of concrete surface layer;
Step 4, the short wall reinforcing steel implant of steel concrete;
Step 5, installs mild steel damper;
Step 6, the short wall form of steel concrete is installed;
Step 7, the grouting of short wall note;
Step 8, short wall form removes maintenance.
Wherein, step one concrete technology is: carry out surveying setting-out according to construction drawing to needing the position of construction, and carry out mark with red paint.And snap the line is carried out to short wall Construction of Supporting position.Short wall support size should be constructed according to designing requirement, is generally 0.24m wide, and 2m is long.
Step 2 concrete technology is:
1) according to designing requirement, steel bonding or carbon cloth reinforcing are carried out to the local beam of short wall support system construction part, plate.Steel-bonded reinforcement or the requirement of carbon fiber reinforcement related specifications should be met during construction;
2) to local damage defects of concrete structure after shake, chemical grouting method can be adopted to carry out reinforcement and strengthening.Loose concrete should be rejected before construction and make it expose reinforcing bar, repairing area edge is cut into perpendicular shape, all rubbles, dust or other foreign material before grouting, should be removed, and carrying out chemical grouting behind moistening substrate concrete surface.
Step 3 concrete technology is:
1) according to surveying setting-out result, to building () short wall Construction of Supporting place, face carries out cutting of concrete surface layer, bottom need be cut a hole to grade beam stirrup face, and floor need be cut a hole to Vierendeel girder stirrup face;
2) to the Nodes installing the installation of mild steel damper side plate, cut floated coat, and polish with portable sanding machine.
Step 4 concrete technology is:
1) according to the requirement of short wall design reinforcement, bar planting face delimited and need effective reinforcement position, and select drill bit and plant equipment according to the requirement of bar diameter, anchorage depth;
2), after reaching drilling depth by sequence of construction electric hammer pore-forming, adopt blower fan to add conduit mode and stretch in hole and carry out hole clearly, and please management carry out an acceptance inspection to aperture, hole depth, hole blocks by qualified rear stopper etc., makes temporary enclosed, prevents foreign matter from falling in hole;
3) Length of Reinforcement Before Being Incised according to damper height He Qiang, the physical dimension of beam and the type of attachment of steel bar end or should receive head way reasonable computation.Should process corrosion of steel bar part, with sand papering rust cleaning, to exposing metallic luster.Anchoring adhesive adopts according to design model, and strict by specification ratio carries out joining glue, stirs, and finishes using within the 45min time;
4) bar planting glue is injected in the hole of having bored, once complete, and the reinforcing bar handled well is inserted in the hole.Slowly rotate reinforcing bar when putting into, allow hole and reinforcing bar bond comprehensively, and with hole excessive go out glue be advisable;
5) carry out natural curing at normal temperatures, should not be disturbed between curing time.
The concrete technology that step 5 installs mild steel damper is:
1) on request the position of installing damper is positioned, hole on beam according to position, damper side plate bolt hole, adopt M12 high-strength to wearing bolt, and adopt bar planting formula anchorage style to carry out the fixing of damper side plate according to spiro keyhole position, structure glue should be adopted before construction completely to stick on side plate;
2) utilize the operation platform that activity gate-type scaffold building one is parallel with damper short wall knee wall top, operation platform is that both sides are set up;
3) be fixed at floor subdrilling hole, upper strata expansion bolt the otic placode hanging jack suspension hook, jack is suspended on otic placode, jack is pulled damper to be promoted to more than the short wall top of damper, steel bridging piece is placed between the operation platform of both sides, then on damper, the rope made of hemp is fastened, with manually promoting damper, damper is pulled with lineup at the other end, until damper is pushed under beam, left and right and front and back arrange the jack of rear dismounting damper lifting in place all between two parties, with jack by damper jack-up and upper side panel close contact, then spot welding is by damper fixation, start welding,
4) answer two ends to carry out during damper welding simultaneously, and block mild steel steel plate in damper with slim little steel plate as baffle plate, avoid causing the mild steel steel plate of damper impaired during welding, adopt intermittent weld layering welding during welding, often disconnected fusion length controls at 100mm, and indwelling 150mm does not weld in the middle part of steel plate, top and side plate are welded and fixed, below on damper base plate illustratively specification package bolt, pre-buried enter within the walls short, being convenient to after maintenance.
Damper, after welding, adopts colorize method to carry out weld seam detection, after weld seam detection is qualified, carries out fire resistant coating construction according to the requirement of design fire-protection rating and relevant fire protection requirement.
Step 6 concrete technology is:
Short wall reinforcing bar carries out colligation according to design specifications, spacing.After self-inspection, mutually inspection, report management to check and accept after colligation completes, carry out model sheetinstallat after acceptance(check), model sheetinstallat quality should meet related specifications.
Step 7 concrete technology is:
1), before grouting, short wall absolute altitude, axis meet after design specifications requires by inspection can construct, and removes foreign material in short wall base plate.Before grouting, 24h waters abundant moistening substrate concrete surface, adopts stock bundle sponge to be blotted by ponding if any ponding 1h before perfusion;
2) grouting material should adopt mechanical agitation mode, strictly according to grouting agent state modulator match ratio and mixing time.After grouting material stirs, then mix the pea gravel concreten formation pea gravel concreten mixed slurry of 30%, but pea gravel concreten maximum size of coarse aggregate must not be greater than 12.5mm;
3) utilize the feature of mixed slurry good fluidity, adopt " deadweight method " to pour into, should pour into till opposite side overflows from side.After grouting starts, must carry out continuously, can not be interrupted, and grouting time should be shortened as far as possible.Should not vibrate in filling process, available bamboo lath carries out pulling water conservancy diversion, and outside template, adopt hammer to knock gently, promotes that slurry falls and air discharge within the walls, guarantees the compactness of grout blanket;
4) as there is running pulp phenomenon in being in the milk, should process in time;
5) slurry mixed does not allow to continue to use after initial set, continues to use after not allowing secondary to add water again yet;
6) after grouting, exposed part should spray curing agent or covered with plastic film in time, adds a cover wet straw bag and keeps moistening.When adopting covered rearing with plastic film, exposed surface should cover tightly, and keeping has condensate water in plastic sheeting.
Step 8 concrete technology is:
It is dismountable that short wall form reaches prescribed strength rear at grouting material, and short wall should be kept after dismounting to be in moisture state, and curing time must not be less than 7d, or carry out maintenance at short wall external coating curing agent, and prevent grouting material from occurring shrinkage crack.
The principle of short wall support energy consumption damping reinforcement system is the damping reinforcement thinking of a kind of " soft middle band steel ".At the bottom of structural beams, suitable position arranges mild steel damper, damper is installed and is adopted bar planting formula anchorage style to carry out damper side plate to fix to wearing bolt with high-strength, utilize activity gate-type scaffold building operation platform, coordinate to install after mild steel damper puts in place in conjunction with jack and weld, and be connected with the short wall of steel concrete at damper base plate pre-embedded bolt, be convenient to damper in earthquake, damage rear Replacement and Repair.The short wall of anti-buckling steel bar concrete support take full advantage of pea gravel concreten mixing grouting material fast hard, early by force, the feature of ungauged regions, good fluidity, accelerating construction progress.When earthquake occurs, this system provides additional damping to dissipate or to absorb the energy in Seismic input structure by local distortion, reduces agent structure earthquake response.Be embodied in during geological process: when little shake, mild steel damper is in elastic stage, provides rigidity to structure, structural system has enough anti-lateral rigidities; In, action of strong earthquake time, along with the increase of structure lateral displacement, first mild steel damper and short wall support system enter nonelastic deformation state, produce larger resistance, the seismic energy of a large amount of dissipation input structure attenuating structure earthquake response rapidly; The major part of extremely strong seismic energy is dissipated by damper and short wall support system but not plastic strain by agent structure dissipates, thus makes agent structure avoid entering obvious inelastic state and going to pot.

Claims (2)

1. short wall support energy consumption damping reinforcement structure construction technique, short wall support energy consumption damping reinforcement structure comprises mild steel damper, described mild steel damper is arranged between structural beams and the short wall of steel concrete, described mild steel damper and the fixing of structural beams adopt bar planting formula anchorage style to carry out the fixing of damper side plate with high-strength to wearing bolt, described mild steel damper base plate is connected with the short wall pre-embedded bolt of steel concrete, it is characterized in that: comprise the steps:
Step one, surveying setting-out;
Step 2, local reinforcement is reinforced, and carries out steel bonding or carbon cloth reinforcing to the construction part of structural beams;
Step 3, floor concrete cuts, and to flooring short wall Construction of Supporting, place carries out cutting of concrete surface layer;
Step 4, the short wall reinforcing steel implant of steel concrete;
Step 5, installs mild steel damper;
Step 6, the short wall form of steel concrete is installed;
Step 7, the grouting of short wall note;
Step 8, short wall form removes maintenance;
The concrete technology installing mild steel damper is:
1) on request the position of installing damper is positioned, hole on beam according to position, damper side plate bolt hole, adopt M12 high-strength to wearing bolt, and adopt bar planting formula anchorage style to carry out the fixing of damper side plate according to spiro keyhole position, structure glue should be adopted before construction completely to stick on side plate;
2) utilize the operation platform that activity gate-type scaffold building one is parallel with damper short wall knee wall top, operation platform is that both sides are set up;
3) be fixed at floor subdrilling hole, upper strata expansion bolt the otic placode hanging jack suspension hook, jack is suspended on otic placode, jack is pulled damper to be promoted to more than the short wall top of damper, steel bridging piece is placed between the operation platform of both sides, then on damper, the rope made of hemp is fastened, with manually promoting damper, damper is pulled with lineup at the other end, until damper is pushed under beam, left and right and front and back arrange the jack of rear dismounting damper lifting in place all between two parties, with jack by damper jack-up and upper side panel close contact, then spot welding is by damper fixation, start welding,
4) answer two ends to carry out during damper welding simultaneously, and block mild steel steel plate in damper with slim little steel plate as baffle plate, avoid causing the mild steel steel plate of damper impaired during welding, adopt intermittent weld layering welding during welding, often disconnected fusion length controls at 100mm, and indwelling 150mm does not weld in the middle part of steel plate, top and side plate are welded and fixed, below on damper base plate illustratively specification package bolt, pre-buried enter within the walls short, being convenient to after maintenance.
2. short wall support energy consumption damping reinforcement structure construction technique according to claim 1, it is characterized in that: the grouting of short wall note adopts " deadweight method " to pour into, pour into from side till opposite side overflows, after grouting starts, carry out continuously, carry out pulling water conservancy diversion with bamboo lath in filling process, and outside template, adopt hammer to knock gently, promote that slurry falls and air discharge within the walls, guarantees the compactness of grout blanket.
CN201410072375.9A 2014-02-28 2014-02-28 Short wall support energy consumption damping reinforcement structure and construction technology Active CN103835522B (en)

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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106760014A (en) * 2016-12-22 2017-05-31 浙江建科减震科技有限公司 A kind of board-like adjustable damper embedded part of full assembled and installation method

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* Cited by examiner, † Cited by third party
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JP3897648B2 (en) * 2002-06-13 2007-03-28 株式会社フジタ Seismic control structure of reinforced concrete building
JP2005090125A (en) * 2003-09-18 2005-04-07 Toda Constr Co Ltd Construction method of damping column
CN1594908A (en) * 2004-06-30 2005-03-16 大连理工大学 Double-X type flexible steel damper
JP2006132150A (en) * 2004-11-04 2006-05-25 Taisei Corp Seismic response control column and its construction method
CN101131005A (en) * 2007-07-17 2008-02-27 大连理工大学 Metal yield and friction damper associated shock-absorbing control method
CN102635176B (en) * 2012-05-10 2014-04-02 南京工业大学 Shear yield and bending yield combined type staged soft steel damper

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