CN214885767U - Reinforced concrete frame node HDC wire winding reinforcing apparatus - Google Patents
Reinforced concrete frame node HDC wire winding reinforcing apparatus Download PDFInfo
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- CN214885767U CN214885767U CN202022472588.4U CN202022472588U CN214885767U CN 214885767 U CN214885767 U CN 214885767U CN 202022472588 U CN202022472588 U CN 202022472588U CN 214885767 U CN214885767 U CN 214885767U
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Abstract
The utility model relates to a reinforced concrete frame node HDC wire winding reinforcing apparatus, including the frame roof beam of vertical frame post and the horizontal extension of week side thereof, reinforcing apparatus's reinforcement district is including communicating full-height replacement district and partial replacement district, and full-height replacement district establishes the through formation for frame roof beam self and frame post contact end chisel, and partial replacement district establishes to frame post inside node core area formation for chisel inwards from frame post peripheral surface, and the exposed stirrup in node core area each limb mid point connecting line department has all linked firmly vertical reinforcing bar to through cold drawn steel wire with each reinforcing bar wiring as an organic whole, full-height replacement district and partial replacement district all fill the reinforcement through HDC spraying; through setting up the multistage replacement region, the weakening beam-ends consolidates, has increased the plasticity hinge figure of beam-ends under the earthquake action, has improved the redundancy of node destruction, adopts cold drawing steel wire and for the wire winding reinforcing bar can retrain the concrete of core area more efficiently, improves the hoop effect of core area, increases the constraint effect to the concrete.
Description
Technical Field
The utility model relates to a reinforced concrete frame node HDC wire winding reinforcing apparatus.
Background
In the reinforced concrete frame structure, the joint of a frame column and a frame beam is a vital part in the whole structure, and mainly comprises a frame column and a beam intersected joint core area, and a column end and a beam end which are connected with the joint core area, wherein the joint core area plays a role in transferring load and distributing internal force in the whole frame structure. The node design is a key defense line for seismic fortification, and according to the regulations of building seismic design Specification (GB 50011-2010), the node which is reasonably designed has a normal damage form that a beam end plastic hinge area firstly generates a fine vertical crack under the action of strong shock. Along with the continuous input of seismic energy, the concrete of the compression area of the beam is crushed, meanwhile, an oblique cross crack begins to appear in the core area of the node and penetrates through the whole node, and finally, the core area of the node is subjected to shear failure and the concrete crushing or shear deformation is accompanied with the column end. In view of this, in order to reinforce the node after the node is damaged by earthquake, the cracked and un-peeled concrete needs to be removed, and then the beam end, the column end, and the core area of the node are reinforced.
The method for reinforcing the frame structure node generally comprises a method for reinforcing an enlarged node area, a method for reinforcing a hoop, a method for reinforcing replacement concrete, a method for wrapping angle steel, and the like. Because the stress of the node area is complex, a single reinforcing method cannot meet the reinforcing requirement. Most of the existing combined reinforcement methods are established on the basis of replacing concrete, and the stress performance of a node area is met by processing locally damaged concrete and combining measures such as additionally arranging dowel bars, steel hoops and angle steel.
The existing replacement concrete reinforcing method can improve the local defects of stressed members, basically does not change the section shape of the original structure after reinforcement, can effectively reduce the influence of reinforcing operation on building space, is particularly suitable for the conditions that the concrete in the stressed area of the original member is seriously damaged, the strength is too low, and the original member is corroded by physical and chemical engineering, is in fire and the like, and has better reinforcing effect. In order to solve the problem that the bonding force between the newly replaced concrete and the original structure is poor, the existing replacement reinforcement begins to replace the original common concrete by adopting fiber cement-based composite materials or high-ductility concrete (HDC) and the like, and the high-performance concrete has the characteristics of good bonding performance with the original structure, higher extreme pressure-limiting strain and compression toughness, high strength, high damage resistance and the like, and can effectively improve the bearing capacity and the seismic performance of the node.
Prior art techniques tend to reinforce the core region of the node prior to replacement concrete reinforcement. For example, fiber cloth is pasted in the node core area, or angle steel is arranged at the corner of the node concrete, or prestressed steel tows are adopted to wrap the node core area. However, the combined reinforcement method has various defects, such as more edges and corners after the concrete in the node area is broken, easy splitting of the adhered fiber cloth, and inconvenience in coating the primer and the structural adhesive; the self weight and the rigidity of the node can be increased by the profile steel structure, so that the node is unfavorable for earthquake resistance; the conventional prestressed steel strand reinforcement can only generate constraint near the corners of the member and in the node core area, which is consistent with the stress mechanism of a fiber cloth or a stirrup wrapping a frame column, the stirrup can be bent outwards under the action of the prestressed steel strand, and the section of the concrete near the side edge is not constrained.
In addition, most of the existing high-performance concrete reinforcement is replaced beam end concrete, a node core area and a column end are not reinforced, the seismic target of ' strong and weak columns and ' strong and weak members ' cannot be perfectly realized, the damage form of a reinforced structure is possibly changed disadvantageously, and the damage area under the action of an earthquake cannot be accurately predicted.
SUMMERY OF THE UTILITY MODEL
In view of the not enough of prior art, the utility model aims to solve the technical problem that a reinforced concrete frame node HDC wire winding reinforcing apparatus is provided, not only simple structure is reasonable, and convenient construction is swift moreover.
In order to solve the technical problem, the technical scheme of the utility model is that: the utility model provides a reinforced concrete frame node HDC wire winding reinforcing apparatus, includes the frame roof beam of vertical frame post and the horizontal extension of week side thereof, reinforcing apparatus's reinforcement district is including communicating full-height replacement district and partial replacement district, and the full-height replacement district is established for frame roof beam self and frame post contact end chisel and is run through the formation, and partial replacement district establishes to frame post inside node core district formation for boring inwards from frame post peripheral surface, each limb mid point connecting wire department of node core district exposed stirrup has all linked firmly vertical reinforcing bar to it is a whole with each reinforcing bar wiring through the cold drawn steel wire, full-height replacement district and partial replacement district are all spouted and are smeared the packing and consolidate through HDC.
Further, the cold drawn steel wire is wound along node core area axis direction slant to in the tip welding on the stirrup, node core area extends its axis direction and is provided with a plurality of stirrups, the reinforcing bar is all through intermittent type spot welding and stirrup welding.
Further, the reinforcing bar all pastes and establishes each surface in node core area week side, and the cold drawn steel wire wraparound is in reinforcing bar and node core area periphery promptly, wedge the steel wedge between cold drawn steel wire and the node core area surface.
Furthermore, the HDC mainly comprises polyvinyl alcohol fibers, portland cement, water, quartz sand, a polycarboxylic acid high-efficiency water reducing agent and fly ash, and the replacement interface performance can be improved by doping nano silicon dioxide.
Furthermore, the HDC in the full-height displacement area is different from that in the partial displacement area, the HDC with the fiber volume mixing amount of 1.5% is in the full-height displacement area, and the HDC with the fiber volume mixing amount of 1.0% is in the partial displacement area.
Further, the frame post vertically runs through the floor and is fixed, and the frame roof beam all is located the floor lower extreme and links firmly with it.
Furthermore, the upper end face and the lower end face of the frame beam in the nearly full-height displacement area are both concavely provided with reinforcing grooves, and HDC with the fiber volume doping amount of 1.0% is sprayed and filled in the reinforcing grooves.
Compared with the prior art, the utility model discloses following beneficial effect has:
1) the utility model discloses adopt full-height replacement concrete and partial high replacement concrete at the beam-ends for the frame roof beam produces a plurality of plasticity hinges under the earthquake action, replaces at ordinary concrete district section, different HDC promptly and consolidates the district section and form the plasticity hinge, through the rotation dissipation seismic energy of plasticity hinge, increases the redundancy of component under the earthquake action, protects node core space better.
2) The utility model discloses a HDC replaces and consolidates, removes from and replaces in the past to consolidate and need apply paint the process that the structure interface was glued to former component concrete adhesive surface with a brush, utilizes silica, fly ash etc. that contain in the HDC to improve the adhesion between the new and old interface of concrete. The HDC is coated on a node core area, the high strength, the high ductility and the high damage resistance of the HDC are utilized to ensure that the stress performance of the node is improved under the condition that the cross section is not increased as much as possible, meanwhile, the internal cold-drawn steel wire is better sealed, and the service life of the steel wire is prolonged.
3) The hooping in the core area is prevented from outward protruding and deforming by arranging the steel wedge, the cold-drawn steel wire and the steel bar, so that the core concrete is restrained better, and the bearing capacity of the core area is greatly improved. The obliquely wound steel wires and the HDC are stressed cooperatively, so that the occurrence of shearing oblique cracks in the core area of the node is limited, and the shearing deformation of the node is reduced to the maximum extent.
4) The reinforcing device can not greatly increase the shape, size and dead weight of the node, is very beneficial to earthquake resistance, is simple and easy to construct, and is suitable for quickly repairing damaged components. Also be applicable to the optimization and join in marriage the node that the hoop is too close, improve node core area's shear capacity through coiling the steel wire and setting up the reinforcing bar for the wire winding, can replace most stirrup, the construction operation of being convenient for.
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
fig. 2 is a vertical cross-sectional view of an embodiment of the present invention;
fig. 3 is a transverse cross-sectional view of an embodiment of the present invention;
FIG. 4 is a schematic view of the reinforced structure of the embodiment of the present invention;
fig. 5 is a disassembly schematic diagram of the embodiment of the present invention for removing the frame post and the frame beam.
In the figure: 1-frame column, 2-frame beam, 3-full-height replacement area, 4-partial replacement area, 5-reinforcing groove, 6-stirrup, 7-reinforcing steel bar, 8-cold-drawn steel wire and 9-floor slab.
Detailed Description
In order to make the aforementioned and other features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
As shown in fig. 1-5, a reinforced concrete frame node HDC wire winding reinforcing apparatus, including vertical frame post 1 and the frame roof beam 2 of the horizontal extension of week side thereof, reinforcing apparatus's reinforcement district is including communicating full-height replacement district 3 and partial replacement district 4, and the full-height replacement district establishes the formation of running through for frame roof beam self and frame post contact end chisel, and partial replacement district establishes to frame post inside node core region formation from frame post peripheral surface chisel inwards, each limb mid point line department of stirrup 6 that node core region exposes all links firmly vertical reinforcing bar 7 to through cold drawing steel wire 8 with each reinforcing bar wiring as an organic whole, full-height replacement district and partial replacement district are all spouted through the HDC and are smeared the filling and consolidate.
The embodiment of the utility model provides an in, the cold drawing steel wire is along node core space axis direction slant winding to on the stirrup in the tip welding, node core space prolongs its axis direction and is provided with a plurality of stirrups, the reinforcing bar is all through intermittent type spot welding and stirrup welding.
The embodiment of the utility model provides an in, the reinforcing bar all pastes and establishes each surface in node core district week side, and the cold drawn steel wire wraparound is in reinforcing bar and node core district periphery promptly, wedge the steel wedge between cold drawn steel wire and the node core district surface.
In the embodiment of the present invention, the HDC mainly comprises polyvinyl alcohol fiber, portland cement, water, quartz sand, polycarboxylic acid-based superplasticizer, and fly ash, and the replacement interface performance can be improved by doping nano-silica.
The embodiment of the utility model provides an in, the HDC in full-height replacement district and the partial replacement district is different, is 1.5% HDC for the fiber volume of mixing in the full-height replacement district, and the partial replacement is distinguished is 1.0% HDC for the fiber volume of mixing, should make its intensity grade be higher than the at least one-level of concrete intensity grade of former component.
The embodiment of the utility model provides an in, the vertical floor 9 and fixed of running through of frame post, the frame roof beam all is located the floor lower extreme and links firmly rather than.
The embodiment of the utility model provides an in, the frame roof beam is equipped with the stiffening groove 5 in nearly full-height displacement district terminal surface is all sunken, all spouts in this stiffening groove to fill has the HDC that the fibre volume of mixing is 1.0%, and the stiffening groove also belongs to partial displacement district promptly.
The utility model discloses construction principle:
1) effectively support each component of frame, reject outer end damage concrete along whole width, the replacement degree of depth should not be less than 50mm, full-height replacement length for damage crack large amplitude appearance scope, reinforcing groove length is full-height replacement length and extends the length more than 100mm again. Wherein the partial replacement regions can be removed symmetrically along the partial width, but not only one corner of the cross section. The original section is subjected to interface treatment, high-pressure water jet can be used for roughening the original section into uniform lines in the direction vertical to the axis, and residual moisture can promote unhydrated cement and fly ash in HDC to generate further hydration reaction to fill interface gaps, so that the interface performance of a new structure and an old structure is enhanced.
2) Clear away the fitment layer all around of node core space and clear away the concrete protective layer, wherein the end need clear away to respectively exposing a stirrup about the core space at least, makes things convenient for cold drawn steel wire spot welding to the stirrup. And (3) grinding each edge of the core area of the node into a round angle, and then roughening and cleaning the cross section.
3) The HDC is used for spraying and smearing reinforcement on a part of the replacement area, and the winding reinforcement of the node core area can be performed firstly in the curing process. Before the wire winding, the wire winding steel bar is fixed to the middle of the side edge of the column in parallel to the axial direction of the column, two ends of the steel bar can be bound to the exposed stirrups, and the steel wire is firmly welded on the stirrups of the frame column by an intermittent spot welding method. And then continuously applying force for winding along the side surface of the node core area by inclining a certain angle (generally inclining by 30 degrees), and spot-welding the tail end of the steel wire to the stirrup at the lower end of the core area. In order to ensure that the steel wire better restrains the core area, a steel wedge can be driven between the steel wire and the surface of the node core area, so that the steel wire is tighter.
4) And (4) spraying, smearing and reinforcing the full-height displacement area by using HDC. And (4) building a template in the full-height replacement area, and then injecting HDC into the template to finish the replacement of the beam end concrete. If the bearing capacity of the upper column of the node is found to be insufficient through design checking calculation, the plastic hinge area of the upper column is replaced and reinforced, and the frame column is prevented from being damaged before the frame beam. And after the maintenance is finished, the template can be detached to finish the reinforcing operation.
The embodiment of the utility model provides an in, utilize HDC's high tenacity, high strength to improve the bearing capacity and the ductility of frame roof beam, improve the adhesive property between HDC and old concrete through doping nanometer silica and fly ash. The cold-drawn steel wire and the steel bar for wire winding realize the restraint with higher efficiency in the core area of the node, enhance the hoop effect in the core area and indirectly improve the bearing capacity of the concrete in the core area. And a new replacement mode is adopted, so that the replacement area and the replacement material are stressed in a step shape, and the node anti-seismic defense line is increased. The multi-section plastic hinges on the frame beams are used for consuming the damage energy, and the stress performance of the reinforced frame joints is greatly improved.
In the description of this patent, it is to be understood that the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the patent, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the patent.
The utility model discloses not limit to above-mentioned best mode, anybody can all derive other various forms's reinforced concrete frame node HDC wire winding reinforcing apparatus under the enlightenment of the utility model. All the equivalent changes and modifications made according to the claims of the present invention shall fall within the scope of the present invention.
Claims (3)
1. The utility model provides a reinforced concrete frame node HDC wire winding reinforcing apparatus which characterized in that: including vertical frame post and the frame roof beam of the horizontal extension of week side thereof, reinforcing apparatus's reinforcement district is including communicating full-height replacement district and partial replacement district, and the full-height replacement district establishes for frame beam self and frame post contact end chisel and runs through the formation, and partial replacement district establishes to frame post inside node core district formation for boring inwards from frame post peripheral surface, each limb mid point connecting line department of node core district exposed stirrup has all linked firmly vertical reinforcing bar to be a whole with each reinforcing bar wire-wound connection through the cold drawn steel wire, full-height replacement district and partial replacement district all spout to smear the packing and consolidate through HDC.
2. A reinforced concrete frame node HDC wire-wrapped reinforcement device according to claim 1, wherein: cold drawn steel wire is along node core area axis direction slant winding to on the stirrup in the tip welding, it is provided with a plurality of stirrups to extend its axis direction in the node core area, the reinforcing bar is all through intermittent type spot welding and stirrup welding.
3. A reinforced concrete frame node HDC wire-wrapped reinforcement device according to claim 2, wherein: the reinforcing bar all pastes and establishes each surface in node core area week side, and the cold drawn steel wire wraparound connects in reinforcing bar and node core area periphery promptly, wedge the steel wedge between cold drawn steel wire and the node core area surface.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022472588.4U CN214885767U (en) | 2020-10-30 | 2020-10-30 | Reinforced concrete frame node HDC wire winding reinforcing apparatus |
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| CN202022472588.4U CN214885767U (en) | 2020-10-30 | 2020-10-30 | Reinforced concrete frame node HDC wire winding reinforcing apparatus |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112144910A (en) * | 2020-10-30 | 2020-12-29 | 福州大学 | Reinforced concrete frame joint HDC wire winding reinforcing device and construction method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112144910A (en) * | 2020-10-30 | 2020-12-29 | 福州大学 | Reinforced concrete frame joint HDC wire winding reinforcing device and construction method thereof |
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