Coupled shearing force wall energy-dissipation beam-coupled steel plate Buddhist nun device and using method thereof
The present invention discloses a kind of damper and using method thereof, particularly a kind of damper and using method thereof that connects the power consumption of limb shear wall coupling beam that strengthen.
Connecting the limb shear wall structure is the form of structure that high building structure generally adopts, and its duty under geological process is closely related with the rigidity of destroying the relative shear wall wall with coupling beam of form limb, bearing capacity etc." the weak beam of strong limb " followed in the structure ductility designing requirement, principles such as " strong shear capacity and weak bending capacities ", but usually have contradiction aspect rigidity that guarantees coupling beam and the ductility ability.Therefore how to satisfy (1) normal use and frequently occurred earthquake under coupling beam with connect limb shear wall wall limb co-operation, for limb shear wall structure even provides enough anti-side rigidity; (2) coupling beam plays a protective role to connecting the limb shear wall structure prior to wall limb surrender performance coupling beam ductility power consumption effect under fortification intensity and rarely occurred earthquake, and this is the key that connects limb shear wall structure seismic design.Present shear wall structure seismic design, the rigidity of coupling beam and the coordination between the ductility and arrangement of reinforcement are difficult points, if the cross section is done for a short time, need join a large amount of reinforcing bars and cause overreinforced and increase difficulty of construction for bearing bigger seismic shear; If the cross section is done greatly, coupling beam rigidity increases, and the seismic shear of distribution can increase rapidly again, still has the difficult problem of arrangement of reinforcement overreinforced, does not reach the target of coupling beam ductility design.For solving an above-mentioned difficult problem, Chinese scholars has been done many research work, has proposed multiple solution.Such as, in the early stage seventies in 20th century, scholars such as New Zealand T.Paulay have just proposed to set up the little span-depth radio antidetonation coupling beam arrangement of reinforcement scheme of arranging the pillar cage of reinforcement along coupling beam two diagonals, as shown in Figure 26.Also there is the scholar to propose to set up vertical muscle (two ends are anchored in the shear wall) scheme along deck-molding, simply add along coupling beam diagonal intersection diagonal bar and (respectively do not add stirrup to diagonal bar, promptly do not form sleeper) scheme, and simply add scheme of the intersection rhombus muscle of forming by four groups of broken line shape reinforcing bars etc., as shown in Figure 27.But completed result of the test shows that these scheme energy dissipation capacities are general, the better anti that is unrealized, and increased the arrangement of reinforcement difficulty again.
In recent years, structural vibration control, energy-dissipating and shock-absorbing (shaking) technology are widely used in field of civil engineering, for civil engineering antidetonation and windproof safety and economy provide an effective way.Metal damper as one of energy-consumption shock-absorption device also is applied earlier, proposes the metal damper structure and drops into the engineering application as people such as Kelly in 1972.Metal damper utilizes metal to enter good hysteretic characteristic after the plasticity, absorbs a large amount of vibrational energies in plasticity hysteresis deformation process, reaches the effect that improves structural damping.Metal damper is used for new building and the upgrading of existing building antidetonation in a large number and transforms and reinforce.A kind of as metal damper of surrender steel plate damper in the plane, existing more research, it mainly relies on the internal strain of steel plate plane to cause in the setting regions steel plate to enter plastic yielding to consume energy damping is provided.Such damper initial stiffness is big, supporting capacity and energy dissipation capacity are better, mainly contains cellular damper, the troughing plate damper, and circle hole damper, types such as two X-shaped dampers respectively see accompanying drawing 20, accompanying drawing 21, accompanying drawing 22, accompanying drawing 23 for details.Above-mentioned four kinds of dampers are mainly used in the steel work, are laid in steel frame support and connection point or internal and external frame junction.This method is easy for installation, generally can realize installing by bolt connection or welding.The connection of damper shown in accompanying drawing 20, the accompanying drawing 21 is adopted directly to punch on steel plate and is done bolted mode, and damper shown in accompanying drawing 22, the accompanying drawing 23 has added angle steel and has been connected with structural element with horizontal connecting plate.
But damper shown in accompanying drawing 21, the accompanying drawing 22 is the minor face of rectangular profile steel plate and is cut, if its profile is changed, it is elongated to make it to be cut the limit, its anti-side rigidity and energy dissipation capacity all can have substantial degradation, X shaped steel plate center development plastic region is narrow and small, plastic region can not fully develop, and carries out in the process and can early destroy in big external force and plasticity.In addition, directly be laid on the steel plate, in loading process, can make the mild steel distortion, influence power consumption effect owing to connect keyhole.If damper shown in accompanying drawing 22, the accompanying drawing 23 is made the very long situation in limit of being cut, making and design all can show complicated slightly, if moment of flexure in the plane appears in the damper two ends, it local buckling occurs easily and influences the power consumption effect.Accompanying drawing 20, accompanying drawing 21, accompanying drawing 22 and accompanying drawing 23 described dampers all do not have to consider to be fit to the damper shape of coupling beam structure, and do not consider to be connected with the special of reinforced concrete coupling beams.
Summary of the invention
At reinforced concrete coupling beams arrangement of reinforcement difficulty in the above-mentioned prior art of mentioning, the power consumption weak effect, the shake back is difficult for repairing, existing damper is minor face and is cut, as make that to be cut the limit elongated, its anti-side rigidity and energy dissipation capacity all can have substantial degradation, occur local buckling easily and influence shortcoming such as power consumption effect etc., the damper workspace of the present invention design and build-in differentiation from, the workspace aspect ratio is compared greatly with existing damper, upper edge, workspace long side direction has two row or the above strip hole of two row, the hole end is done non-wedge angle and is handled, in connecting the limb shear wall, in order to replace reinforced concrete coupling beams or attached to the coupling beam position of the company's of being installed on limb shear wall on the reinforced concrete coupling beams, to solve the problem that the above-mentioned prior art of mentioning exists.Damper provided wall limb coupling stiffness when this invention can guarantee normal use and normal chance earthquake, concentrate the vibrational energy of dissipative structure when fortification intensity and rarely occurred earthquake by plastic yielding power consumption in the damper plane, can improve the structural damping ratio and strengthen anti-collapsing property, solve the difficult problem of shear wall coupling beam overreinforced and arrangement of reinforcement, improve the anti-seismic performance of coupling beam and the recoverability energy after the damage.
The technical scheme that the present invention solves its technical problem employing is: a kind of damper that is used for connecting the power consumption of limb shear wall coupling beam, damper comprises the workspace of interconnective plastic yielding power consumption and the build-in district that keeps approximate rigidity, the workspace has two row or the above strip hole of two row along long side direction, and the hole length direction is parallel to work head of district limit.
A kind of using method that is used for connecting the damper of limb shear wall coupling beam power consumption, this method comprises: one or more damper is replaced reinforced concrete coupling beams or attached to the coupling beam position of the company's of being installed on limb shear wall on the reinforced concrete coupling beams.
The technical scheme that the present invention solves its technical problem employing further comprises:
Described workspace is made by Q235B or low-yield hot rolled steel plate;
Described hole corner is done non-wedge angle and is handled;
Described build-in district thickness is more than or equal to workspace thickness;
Described build-in district is provided with the method that strengthens rigidity, such as haunch, put more energy into or increase the method for build-in district thickness of slab;
Described build-in district is provided with and is easy to the construction measure that is connected with structure, such as bolt hole is set;
Described hole is offered area and is suited to be less than or equal to 20% of the workspace gross area, and described hole length and width ratio optimum range is 5 to 15;
Described damper adopts one when above, each damper workspace is provided with the anti-out-of-plane unstability bolt of out-of-plane unstability of every damper of restriction, and each damper build-in district can or utilize the extra flap welding that each damper contact is as a whole with high-strength friction bolt prestretching;
Described damper using method is: damper is carried out joint construction in the build-in district, directly is connected with welding of structure built-in fitting or bolt at the scene.
The invention has the beneficial effects as follows: adopt according to damper of the present invention and structure, can the company's of replacement limb shear wall structure reinforced concrete coupling beams or the company's of being attached to limb shear wall structure coupling beam on, reduce the arrangement of reinforcement difficulty of coupling beam in structure design difficulty and the construction, make structure structural dynamic characteristic under frequently occurred earthquake constant, structure energy dissipation capacity and anti-collapsing property enhancing under fortification intensity and the rarely occurred earthquake effect.
Damper of the present invention is specified plasticity development zone by the mode of offering two (many) row hole, and simple structure, plasticity develop the zone evenly, extensively, and it is effective to consume energy.Shear or be subjected to curved operating mode that good power consumption effect is all arranged for the damper two ends.
Construct respectively with being connected the build-in district damper of the present invention workspace of will consuming energy, and has avoided workspace surrender power consumption and the conflict between structural rigidity is connected.
The structure that the energy-consumption damper that the present invention proposes concrete form and some build-ins district are connected with shear wall structure, can the company's of being applied to limb shear wall structure seismic design in.The damping unit power consumption is effective, and the anti-seismic performance of shear wall structure is improved obviously, and simple structure does not influence architectural effect, and convenient construction is convenient to maintenance and replacing, meets actual demands of engineering, satisfies engineering industry technology standard, can solve engineering problem.
The present invention will be further described below in conjunction with the drawings and specific embodiments.
Description of drawings
Fig. 1 is an overall structure schematic diagram of the present invention.
Fig. 2 is the A-A cross-sectional view of Fig. 1.
Fig. 3 is the B-B cross-sectional view of Fig. 1.
When using multi-disc for the present invention, Fig. 4 uses high-strength bolt fixed structure schematic diagram.
Fig. 5 is the plan structure schematic diagram of Fig. 4.
Fig. 6 utilizes plug welding with each sheet of damper and backing plate fixed connection structure schematic diagram when using multi-disc for the present invention.
Fig. 7 is the plan structure schematic diagram of Fig. 6.
Fig. 8 is the syndeton schematic diagram of monolithic damper of the present invention and reinforced concrete shear wall.
Fig. 9 is the side-looking structural representation of Fig. 8.
Figure 10 is the C-C cross-sectional view of Fig. 8.
Figure 11 is connected embodiment one structural representation for multi-disc damper of the present invention and reinforced concrete shear wall.
Figure 12 is junction plate schematic diagram and a keyhole layout schematic diagram among Figure 11.
Figure 13 is the D-D cross-sectional view of Figure 11.
Figure 14 is connected embodiment two structural representations for multi-disc damper of the present invention and reinforced concrete shear wall.
Figure 15 is the E-E cross-sectional view of Figure 14.
Figure 16 replaces the reinforced concrete coupling beams structural representation for the present invention.
Figure 17 is for using the damper schematic diagram.
Figure 18 is the F-F cross-sectional view of Figure 16.
Figure 19 is the G-G cross-sectional view of Figure 16.
Figure 20 is a honeycomb damper structure schematic diagram in the prior art.
Figure 21 is a flute profile damper structure schematic diagram in the prior art.
Figure 22 is a circular hole damper structure schematic diagram in the prior art.
Figure 23 is two X-shaped damper structure schematic diagrames in the prior art.
Figure 24 is a kind of flute profile damper hysteresis loop of 5% for percent opening.
Figure 25 is a kind of hysteresis loop of 5% biserial of the present invention hole damper for percent opening.
Figure 26 is the diagonal cross sleeper formula reinforcement structure schematic diagram of little span-depth radio coupling beam.
Figure 27 is the rhombus reinforcement structure schematic diagram of little span-depth radio coupling beam.
Figure 28 is that the conventional limb shear wall structure that connects is replaced company's limb shear wall structure of coupling beam at 7 degree frequently occurred earthquake situation relative storey displacement angle comparison diagrams with application damper of the present invention.
Figure 29 is that the conventional limb shear wall structure that connects is replaced company's limb shear wall structure of coupling beam at 7 degree rarely occurred earthquake situation relative storey displacement angle comparison diagrams with application damper of the present invention.
Among the figure, the 1-workspace, 2-build-in district, the 11-hole, 12-prevents flexing bolt, 13-support floor, 21-workspace extension plate, 22-high-strength bolt, 23-backing plate, 24-junction plate, 25-cover plate, 31-embedded board, 32-built-in fitting, 33-pre-embedded bolt, 34-connecting bolt.
The specific embodiment
Present embodiment is the preferred embodiment for the present invention, and other all its principles are identical with present embodiment or approximate with basic structure or implementation method, all within protection domain of the present invention.
Damper adheres to or company's limb shear wall structure design object of replacing coupling beam is among the present invention: after damper is replaced or adhered to the shear wall coupling beam; structural dynamic characteristic is similar to constant (guaranteeing that promptly the rigidity of structure is constant under the normal operating condition) with the contrast of conventional even limb shear wall structure under the earthquake of normal chance; damper plays one's part to the full under fortification intensity or rarely occurred earthquake; concentrate the structural vibration energy that absorbs the earthquake input, the company's of protection limb shear wall wall limb does not enter plasticity or restriction wall limb plasticity is carried out.Structure of the present invention is identical with the prior art arrangement of reinforcement structure purpose shown in accompanying drawing 26 and the accompanying drawing 27; be coupling beam elastic working and assurance structural entity rigidity under the earthquake of normal chance; coupling beam is surrendered prior to the wall limb under fortification intensity or the rarely occurred earthquake; the structural vibration energy of dissipation earthquake input, protection shear wall wall limb does not enter plasticity or does not collapse.Different with prior art and arrangement of reinforcement structure, the prior art arrangement of reinforcement described in Figure 26 and Figure 27 is constructed the structural vibration energy that the method that still adopts coupling beam to destroy power consumption absorbs the earthquake input, and energy dissipation capacity is limited, and destruction is difficult to repair; Structure of the present invention utilizes the energy-dissipating and shock-absorbing advanced technology, absorbs seismic energy by mild steel damper, and it is effective to consume energy, and is easy to after the shake repair.Power consumption principle of the present invention is identical with damper of the prior art power consumption principle, all is to utilize plastic strain dissipates vibration energy in the plane of setting regions under the external force shear action.Unlike the prior art be that it is big that damper outline aspect ratio of the present invention is compared with prior art wanted, and be more suitable for being applied to shear wall structure coupling beam position.
Please referring to accompanying drawing 1, the structure of damper is among the present invention: the damper tabular that is rectangle, and on the rectangle long side direction, the damper centre position is workspace 1,1 two ends, workspace are build-in district 2.Among the present invention workspace 1 and build-in district 2 are separately designed, its workspace 1 power consumption, build-in district 2 connects, function distinguishing is clear and definite, and the mild steel of Q235B or low-yield is adopted in workspace 1, and the plastic yielding power consumption takes place in specifying plastic region, build-in district 2 can be by increasing the rigidity work that modes such as thickness of slab, stiffening rib or haunch guarantee that it is approximate, build-in district 2 is responsible for being connected with shear wall structure, because it bears dynamic load, the weld seam grade all adopts secondary.The present invention is in workspace 1, have two row or the hole 11 more than two row along the rectangle long side direction, in the present embodiment, hole 11 is offered two row, during concrete enforcement, damper outline aspect ratio is very big if desired, can offer the multiple row hole, hole 11 is elongated, the long limit of hole 11 is parallel with the long limit of damper, strip hole 11 both sides can be designed to any arc, as long as avoid it wedge angle to occur, the arc on its both sides is preferably circular arc, and the hole 11 that provides in the present embodiment two ends that are rectangle are done circular arc and handled, when specifically implementing, hole 11 can also be other strips, the concrete shape of its strip can be ellipse or for being similar to rectangle or other oval strips, the direction of offering of strip hole 11 is: the length direction of hole 11 parallels with the long side direction of workspace 1, and the length direction of hole 11 is rectangular long side direction or oval-shaped long axis direction or the similar long side direction that is similar to rectangular strip hole.Please referring to accompanying drawing 2 and accompanying drawing 3, it is a cross-sectional view of the present invention, can clearerly reflect structure of the present invention.Strip hole 11 also can be designed as the approximate rectangular of small curve arc limit.Can change performance of the present invention by the aspect ratio that changes percent opening and hole 11, during design, the aspect ratio value of hole 11 should be between 5～15, and total open area accounts for workspace 1 gross area should be smaller or equal to 20%.Select damper according to engineering lateral resisting demand and axial force demand, percent opening is big more, and anti-side rigidity is low more, and the power consumption effect is poor more; Aspect ratio increases, and the power consumption effect reduces.The shape of damper of the present invention and structure meet building and the structural requirement that connects limb shear wall coupling beam, for being cut on long limit; Along long side direction according to design arrangement two (many) row strip hole 11; The power consumption of will working is distinguished and is distinguished setting with being connected build-in, and the workspace is easy to enter the plastic yielding power consumption, and the build-in district is in the approximate rigidity work of whole power consumption process.The plasticity development zone of strip hole 11 correspondences is better than the plasticity development in cellular damper X shape sexual development zone in the plasticity evolution of large deformation, it can bear bigger side force, and it is more even, extensive that plasticity is carried out; The energy dissipation capacity and the lateral resisting performance in two (many) row hole are better than single-row hole.
The present invention can replace one or more damper among the present invention reinforced concrete coupling beams or in use attached to the coupling beam position of the company's of being installed on limb shear wall on the reinforced concrete coupling beams.Please referring to accompanying drawing 8, accompanying drawing 9, accompanying drawing 10, a kind of connected mode of individual layer damper and reinforced concrete shear wall wall limb among the present invention shown in the figure, wherein, fixedly connected with connecting bolt 34 earlier with the T shape embedded board 31 in being embedded in reinforced concrete shear wall wall limb in the build-in district 2 of damper, and then with the second-order weld technology with its three weld all arounds, to guarantee its firm connection, after the connection, damper is in reinforced concrete shear wall coupling beam position.
For requirement of engineering, damper also can be provided with two layers or more, specifically select for use damper quantity by design decision, design principles is: guarantee that damper adheres to or the anti-side rigidity of coupling beam of replacing after the coupling beam approaches the conventional anti-side rigidity of limb shear wall structure coupling beam that connects, axial rigidity is not less than the conventional limb shear wall structure coupling beam rigidity that connects, and chooses the damper of damping ratio maximum on this basis; Satisfying under the structural Rigidity Design condition, the anti-side rigidity of damper is being turned down as far as possible, strengthening its energy dissipation capacity.Please referring to accompanying drawing 4, accompanying drawing 5, accompanying drawing 6, accompanying drawing 7, when using the multilayer damper, can adopt following two kinds of concrete structures to connect, the one, between the damper that faces mutually, add backing plate 23, and pass through high-strength bolt 22 with each layer damper and backing plate 23 connections, make it to constitute an integral body, in order to increase the frictional force between damper and the backing plate 23, the method that the contact surface between damper and the backing plate 23 adopts sandblast (ball) back to give birth to red rust makes it to increase the frictional force of its contact surface; The 2nd, between the damper that faces mutually, add backing plate 23, utilize plug welding that each damper that faces mutually and backing plate 23 are welded together, the edge welded cover plate 25 about in the of 2 in damper build-in district then, cover plate 25 is steel plate, with the globality of enhancing multilayer damper and the rigidity in multilayer damper assembly build-in district.Two kinds of concrete structures that the multilayer damper is connected with reinforced concrete shear wall wall limb are provided in the present embodiment.Please referring to accompanying drawing 11, accompanying drawing 12, accompanying drawing 13, be that the multilayer damper is connected concrete structure embodiment one with reinforced concrete shear wall wall limb shown in the figure, shown in the figure for adopting high-strength bolt 22 that each layer damper and backing plate 23 are connected into multilayer damper and a reinforced concrete shear wall wall limb joint construction when whole, workspace extension plate 21 is constructed for haunch and is illustrated.When adopting the above damper of one deck, be welded to connect plate 24 in 2 ends, build-in district, junction plate 24 is connected with built-in fitting 32 by solid matter crab-bolt (Q345), and affixed with two vertical secondary bending resistance weld seams connection assurances in junction plate 24 outsides.Please referring to accompanying drawing 14 and accompanying drawing 15, be that the multilayer damper is connected concrete structure embodiment two with reinforced concrete shear wall wall limb shown in the figure, shown in the figure for utilizing plug welding that each sheet of damper and backing plate are fixedly connected into a multilayer damper and a reinforced concrete shear wall wall limb joint construction when whole, it relies on backing plate 23 to strengthen the shear resistance in build-in district 2, relying on up and down, cover plate 25 strengthens the globality of multi-disc damper and the rigidity in assembly build-in district, and strengthened and being connected of built-in fitting 32, for easy for installation, the present invention can have additional support floor 13 near body of wall below damper.2 ends, damper build-in district and cover plate and the interior built-in fitting welding of shear wall up and down.
Accompanying drawing 1～accompanying drawing 15 described structures and connected mode only are several case according to the invention, the feature of its embodiment " the build-in district is separated with the workspace, strengthen rigidity in the build-in district and rationally be connected with globality and with reinforced concrete shear wall wall limb " of the present invention.
Please referring to accompanying drawing 24 and accompanying drawing 25, accompanying drawing 24 is 4 of single-row hole damper openings, and hole dimension is 400mm * 10mm, is distributed in the hysteresis loop in the steel plate plane; Accompanying drawing 25 is biserial of the present invention hole damper perforate 4 * 2, and hole dimension is 100mm * 20mm, and pitch of holes is 200mm, and 8 holes are distributed in the hysteresis loop in the steel plate plane.By contrasting accompanying drawing 24 and accompanying drawing 25 as can be known, all greater than single-row hole (flute profile) damper, it is effective to consume energy for the hysteretic loop area of biserial hole damper and anti-side ability.
Please referring to accompanying drawing 16～accompanying drawing 19.Replace the concrete application example of coupling beam structure applications in shear wall for employing damper of the present invention shown in the figure.12 layers of coupled shear wall structural model, each high layer by layer 3.3m that is, bottom reinforcement district 1～2 floor thickness of wall body is 0.3m, and non-reinforcement district 3～12 floor thickness of wall body are 0.2m, and two wall limb cross-sectional height are 2m, coupling beam depth of section 0.7m, clear span is 2m.Each floor load calculates according to the wide 3m of slab thickness 0.1m, has considered the advantageous effect on vertical edge of a wing, establishes 1m wide width wing edge at two wall acras, and I shape is arranged.Adopt the replacement method, damper is installed on every layer of coupling beam medium position (part), as shown in Figure 16.This routine damper is selected the damper of percent opening 5% of the present invention for use, and bottom reinforcement district 1～2 floor adopts 4, and non-reinforcement district 3～12 floor adopt 2, can satisfy the functional requirement under the normal use.The model calculation is: 7 degree are normal meets under the geological process, coupling beam replace damper whether structural modal, time-histories displacement response, relative storey displacement angle very near (as shown in Figure 28, wherein the A curve represents not arrange the relative storey displacement angular curve of damper structure, the B curve represents to arrange the relative storey displacement angular curve of damper structure), show that damper replaces coupling beam and do not change structure and often meet elastic dynamic performance under the earthquake; Under the 7 degree rarely occurred earthquake effects, the conventional limb shear wall structure angle of displacement between 3 layers of genetic horizon that connects is suddenlyd change, weak floor appears, and can effectively avoid the appearance of weak floor with the structure that damper is replaced coupling beam, each layer of structure energy dissipation capacity evenly (as shown in Figure 29, wherein the A curve represents not arrange the relative storey displacement angular curve of damper structure, and the B curve represents to arrange the relative storey displacement angular curve of damper structure).
Only with a kind of concrete condition structure of the present invention and concrete the application are described in the present embodiment, the present invention also exists other embodiment, structure and methods for using them.Be the application of the present invention in shear wall structure coupling beam structure as what present embodiment provided, but damper of the present invention also can be used for steel work, the active beam link that supports such as off-centre.The multilayer damper structure that present embodiment provides only shows three-layer structure, but is not limited thereto, and can take multi-ply construction according to actual requirement of engineering.A few connected mode and build-in district processing method under the list that present embodiment provides (many) the floor structure situation, but be not limited thereto, the present invention mainly proposes a kind of total structure and the method that is connected, can be not limited to haunch, put more energy into, increase rigidity and the globality for any increase build-in district of feature such as thickness of slab or change material, guarantee rigidly connected method with agent structure.The structure of the replacement coupling beam part that present embodiment provides, but be not limited thereto, can be template with outer 2 layers of damper, interior concreting, promptly reinforced concrete coupling beams adheres to the mode realization of damper etc.
The present invention can the company's of being widely used in limb shear wall structure in, in order to replace reinforced concrete coupling beams or attached to the coupling beam position of the company's of being installed on limb shear wall on the reinforced concrete coupling beams, to solve the difficult problem of shear wall coupling beam arrangement of reinforcement, realize shear wall coupling beam simple structure, increase its anti-seismic performance.