CN104389438B - A kind of seismic hardening mechanism of concrete column and method - Google Patents
A kind of seismic hardening mechanism of concrete column and method Download PDFInfo
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- CN104389438B CN104389438B CN201410750506.4A CN201410750506A CN104389438B CN 104389438 B CN104389438 B CN 104389438B CN 201410750506 A CN201410750506 A CN 201410750506A CN 104389438 B CN104389438 B CN 104389438B
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Abstract
The present invention relates to a kind of seismic hardening mechanism of concrete column and method, realized using carbon fiber reinforcement lath and metal reinforced hoop joint reinforcement, the seismic hardening mechanism of concrete column of the present invention does not take up space, do not increase the additional load of structure, consolidation effect is notable, is effectively improved bending resistance, shear resistant capacity, ductility and the globality of pillar, thus having reached the purpose improving anti-seismic performance, construction simple and fast, has wide range of applications.
Description
Technical field
The invention belongs to technical field of civil engineering, it is related to civil engineering structure reinforcement technique field and in particular to one kind
The seismic hardening mechanism of concrete column and method.
Background technology
In recent years, with the constantly improve of carbon fibre material manufacturing process, make the cost of carbon fibre material reinforcing engineering big
Width reduces, and based on the material property of its high-strength light, is widely used in aseismatic reinforcement field, is mainly manifested in following
Several aspects：Vertically and horizontally combine the raising that affixing carbon fabric can realize bearing capacity and ductility simultaneously, thus reaching seismic hardening
Mesh, wherein longitudinal carbon cloth is used for resisting larger tension, the development of containment transverse crack, and lateral loops bundle carbon fiber
Cloth energy operative constraint core concrete, improves shear resistance, keeps the globality of shaft；Laterally or ring confinement carbon cloth and
Longitudinally paste the mode of angle steel, be characterized in effectively improving ductility and the shear resistance of shaft, but to bending bearing capacity
Raising and transverse crack development containment aspect DeGrain, and because the Stress resort impact of carbon cloth is so as to difficult
To give full play to high-strength performance.In addition, for cross sectional shape irregular pillar（As L-shaped, T-shaped or cross etc.）, laterally glue
Patch fiber cloth cannot play effective effect of contraction.
Content of the invention
For overcoming drawbacks described above, it is an object of the invention to provide a kind of seismic hardening mechanism of concrete column.
Another object of the present invention also resides in provides a kind of Shockproof reinforcing method of concrete column.
For achieving the above object, the present invention adopts the following technical scheme that：
A kind of seismic hardening mechanism of concrete column, including rectangle or circular cross section concrete column, smooth asphalt mixtures modified by epoxy resin
Lipid layer, the CFRP strip of vertical and horizontal/ring, described rectangular cross section concrete column（1）Two relative main stress
Cylinder scribbles smooth epoxy resin layer, from scribble epoxy resin layer cylinder top to the uniform cementation in lower end longitudinal direction CFRP strip
（2）, from concrete column top downwards, or from concrete column bottom upwards, glue in often adjacent two longitudinal carbon fiber board interspaces
Gu horizontal CFRP strip（5）, horizontal CFRP strip and longitudinal CFRP strip upper surface flush, in horizontal CFRP strip
On be fixed with rectangle close metal reinforced hoop（3）；Or described circular cross section concrete column（1）Surface scribble smooth
Epoxy resin layer, from scribble epoxy resin layer cylinder top to the uniform cementation in lower end longitudinal direction CFRP strip（2）, from concrete column
Surface top downwards, or from concrete column bottom upwards, close in often adjacent two longitudinal carbon fiber board interspace cementation rings
Close CFRP strip（5）, ring closes CFRP strip and longitudinal CFRP strip upper surface flush, in ring closure carbon fiber
The metal reinforced hoop of circular closure is fixed with lath（3）.
According to the seismic hardening mechanism of above-mentioned concrete column, described metal reinforced hoop（3）For steel strap, at least one
Individual fastening port, fastens port using bolt.
According to the seismic hardening mechanism of above-mentioned concrete column, the thickness of described epoxy resin layer is 1.5 mm～2.3
mm.
According to the seismic hardening mechanism of above-mentioned concrete column, longitudinal CFRP strip（2）Thickness 1 mm～4 mm, width
20 mm～100 mm, spacing 20 mm～200 mm；Ring or horizontal CFRP strip（5）Thickness 1 mm～4 mm, width 20
Mm ~ 100 mm, spacing 100 mm ~ 300 mm, concrete column both ends ring or horizontal CFRP strip（5）Spacing encryption 50
Mm～100 mm, encryption length >=2 times post cross-section lengths.
A kind of Shockproof reinforcing method of concrete column, comprises the following steps：
A. mixed rectangular cross section of polishing coagulates earth pillar（1）Two relative uneven places of main stress cylinder, or polishing is circular
Cross section concrete column（1）Surface, cleaning, repairing pit-hole；
B. in rectangular cross section concrete column（1）Two relative main stress cylinders or circular cross section concrete column
（1）Surface uniform application epoxy resin layer, levelling；
C. step b epoxy resin be dried after, from scribble epoxy resin layer cylinder top to the uniform cementation in lower end longitudinal direction carbon
Fiber lath（2）, in adjacent two longitudinal carbon fiber reinforcement interspace cementations laterally or ring carbon fiber board lath（5）, make longitudinal direction
CFRP strip（2）With horizontal or ring CFRP strip（5）Upper surface flush；
D. in described horizontal or ring carbon-fibre strips（5）Upper surface is fixing to close metal reinforced hoop（3）；
E. the metal reinforced hoop to step d（3）Do preservative treatment.
According to the Shockproof reinforcing method of above-mentioned concrete column, the thickness of the epoxy resin layer described in step b is 1.5 mm
～2.3 mm.
According to the Shockproof reinforcing method of above-mentioned concrete column, the longitudinal carbon fiber reinforcement lath described in step c（2）Thickness
1 mm～4 mm, width 20 mm～100 mm, spacing 20 mm～200 mm；Ring or horizontal carbon-fibre strips（5）Thickness 1 mm
～4 mm, width 20 mm ~ 100 mm, concrete column both ends ring or horizontal CFRP strip（5）Spacing encryption 50 mm～
100 mm, encryption length >=2 times post cross-section lengths.
According to the Shockproof reinforcing method of above-mentioned concrete column, the CFRP strip described in step c and cylinder joint, vertical
To CFRP strip（2）With ring or horizontal CFRP strip（5）Joint adopts carbon fiber bonded adhesives to bond, carbon fiber bonding
Sag≤3 mm during 40 DEG C of glue.
According to the Shockproof reinforcing method of above-mentioned concrete column, the metal reinforced hoop described in step d（3）For steel strap, extremely
A rare fastening port, fastens port using bolt；Fixed using steel bonding glue with CFRP strip joint.
According to the Shockproof reinforcing method of above-mentioned concrete column, the preservative treatment of step e includes rust cleaning, brushing red lead anti-corrosive paint
With synthetic enamel step；Described red lead anti-corrosive paint and synthetic enamel are brushed 2～3 times respectively, per pass coating layer thickness 25 μm～50
μm, each brushing time interval >=4 h.
The positive beneficial effect of the present invention
1. the Shockproof reinforcing method of concrete column of the present invention, using CFRP strip and metal reinforced hoop joint reinforcement, ring
To or transverse metal reinforce the effect that hoop has not only acted as the longitudinal CFRP strip of anchoring, and constrain concrete, improve
Concrete bearing capacity, has contained the development of longitudinal cracks, it is achieved thereby that the multiple-effect of material utilizes；Ring or transverse metal add
Gu binding round the anchorage style combining using bolt and steel bonding glue, effectively raise adhesion strength, and in colloid cure stage not
Need additionally to apply pressure to metal reinforced hoop, effectively simplify operational procedure.Therefore, ring or transversely strengthening hoop can not only
Efficiently reduce the adverse effect of concentrated stress at post angle, and by the collective effect of bolt and steel bonding glue it can be avoided that reinforcing
Material is done sth. in advance to peel off, and eliminates the Stress resort impact between metal reinforced hoop and stirrup, is conducive to metal reinforced hoop fully to send out
Wave performance.
2. the CFRP strip that the present invention longitudinally pastes functions as the consolidation effect of multi-storey up-down and translation, decreases
Paste number of times, improve efficiency of construction.
3. the seismic hardening mechanism of concrete column of the present invention does not take up space, and does not increase the additional load of structure, consolidation effect
Significantly, bending resistance, shear resistant capacity, ductility and the globality of pillar are effectively raised, thus having reached raising anti-seismic performance
Purpose, reinforcement means construction simple and fast it is adaptable to the reinforced column of bearing capacity need to be improved, such as：Corrosion post, application
In extensive range.
Brief description
Fig. 1 is one of seismic hardening mechanism structure schematic diagram of the embodiment of the present invention 1 rectangular section column；
Fig. 2 is the overlooking the structure diagram of Fig. 1；
Fig. 3 is the two of the seismic hardening mechanism structure schematic diagram of the embodiment of the present invention 1 rectangular section column；
Fig. 4 is the overlooking the structure diagram of Fig. 3；
Fig. 5 is the three of the seismic hardening mechanism structure schematic diagram of the embodiment of the present invention 1 rectangular section column；
Fig. 6 is the overlooking the structure diagram of Fig. 5；
Fig. 7 is one of seismic hardening mechanism structure schematic diagram of the embodiment of the present invention 2 circular cross-section post；
Fig. 8 is the overlooking the structure diagram of Fig. 7；
Fig. 9 is the two of the seismic hardening mechanism structure schematic diagram of the embodiment of the present invention 2 circular cross-section post；
Figure 10 is the overlooking the structure diagram of Fig. 9；
Figure 11 is the three of the seismic hardening mechanism structure schematic diagram of the embodiment of the present invention 2 circular cross-section post；
Figure 12 is the overlooking the structure diagram of Figure 11.
Specific embodiment
With reference to some specific embodiments, the present invention is further described.
The meaning of in figure symbology：1- concrete column, 2- longitudinal direction CFRP strip, the metal reinforced hoop of 3-, 4- bolt, 5-
Ring or horizontal CFRP strip.
Embodiment 1
Referring to Fig. 1～6, a kind of seismic hardening mechanism of concrete column, including rectangular cross section concrete column, smooth ring
Oxygen tree lipid layer, the CFRP strip of vertical and horizontal, the relative main stress cylinder of rectangular cross section concrete column 1 two scribbles flat
Whole epoxy resin layer, from scribbling epoxy resin layer cylinder top to the uniform cementation in lower end longitudinal direction CFRP strip 2, from concrete
Capital end is downward, or from concrete column bottom upwards, in often adjacent two longitudinal horizontal carbon fibers of carbon fiber board interspace cementation
Lath 5, horizontal CFRP strip and longitudinal CFRP strip upper surface flush, are fixed with rectangle on horizontal CFRP strip and close
Close metal reinforced hoop 3；
Described concrete column a size of a ×b×h=200 mm × 250 mm × 2000 mm, main stress surface is a size ofa
×h=200 mm×2000 mm.
Described longitudinal CFRP strip 2 thickness 1.4 mm, width 20 mm～100 mm, spacing 20 mm～200 mm；
Laterally CFRP strip 5 thickness 1.4 mm, width 20 mm ~ 100 mm, concrete column mid portion spacing 100 mm～300
Mm, the horizontal CFRP strip in concrete column both ends 5 hypotelorism（Encryption）50 mm～100 mm, encrypt length 400 mm.
According to the seismic hardening mechanism of above-mentioned concrete column, described metal reinforced hoop 3 is steel strap, has two fastenings
Port, port is fixed using bolt.
The Shockproof reinforcing method of above-mentioned concrete column, comprises the following steps：
A. the relative main stress cylinder of polishing concrete column 1 two（Two oppositesa×h=200 mm×2000 mm）Concavo-convex
At injustice, cleaning, repairing pit-hole；
Two relative main stress cylinders of concrete column are polished flat, removes the loose concrete in top layer, until completely
Expose the new face of xoncrete structure, if crack or exists larger uneven in surface, should be using the strong reparation of cementitiousness
Material is repaired, if destroying has occurred in root concrete, should reject the concrete destroying, fill high-strength mortar, so that
CFRP strip is fitted tightly with concrete；
B. in 1 two relative main stress cylinder uniform application epoxy resin layers of concrete column, thickness 2 mm, levelling；
（1）Prepare epoxy resin adhesive；
（2）Uniformly, should the situation that leakage is brushed or thickness is blocked up in brush epoxy resin adhesive thickness, repeatedly levelling many
Secondary, prevent colloid from becoming under plume；
（3）Safeguard procedures are taken it is ensured that epoxy gluing agent surface cleaning after the completion of brush coating；
C. after step b epoxy resin is dried, using carbon fiber adhesive glue（Its power letter TLS-500 series carbon fiber is reinforced
Glue）Uniformly paste longitudinal CFRP strip 2 from two relative main stress cylinder upper ends to lower end, paste 6, at adjacent two
Longitudinal carbon fiber board interspace adopts carbon fiber adhesive glue（Its power believes TLS-500 series carbon fiber reinforced glue）Paste horizontal carbon fine
Dimension lath 5, makes longitudinal CFRP strip 2, horizontal CFRP strip 5 upper surface flush, and longitudinal CFRP strip 2 is fine with horizontal carbon
Dimension lath 5 joint adopts carbon fiber adhesive glue（Its power believes TLS-500 series carbon fiber reinforced glue）Bonding；
Described longitudinal CFRP strip 2 thickness 1.4 mm, width 20 mm～100 mm, spacing 20 mm～200 mm；
Laterally carbon fiber board 5 thickness 1.4 mm, width 20 mm～100 mm, concrete column mid portion spacing 100 mm ~ 300 mm,
The hypotelorism of concrete column both ends（Encryption）50 mm～100 mm, encrypt length 500 mm.
Sag≤3 mm during 40 DEG C of described carbon fiber cementing agent；
D., after the solidification of step c carbon fiber bonded adhesives, adopt steel bonding glue in described horizontal CFRP strip upper surface
（TLS-401 type steel bonding glue）Fix one week metal reinforced hoop 3 along shaft, metal reinforced hoop has two fastening ports, tight with bolt 4
Fixed end mouth；
E. hoop 3 metal reinforced to step d does preservative treatment；
Preservative treatment includes rust cleaning, brushing red lead anti-corrosive paint and synthetic enamel step, and red lead anti-corrosive paint and synthetic enamel divide
Not Tu Shua 3 times, per pass coating layer thickness be 30 μm, each brushing time interval 5 h.
According to《Code for design of concrete structures》GB50010-2010 specifies, the carrying maximal bending moment of unguyed concrete column
Can be calculated using equation below：
If there is corrosion in concrete column, according to《Code for design of concrete structures》GB50010-2010 specifies, using such as
Lower formula calculates the carrying maximal bending moment of corrosion concrete column：
Reinforce through Shockproof reinforcing method of the present invention, then basis《Concrete structure reinforcement design specification》
GB50367-2013 specifies, calculates the carrying maximal bending moment of concrete column after reinforcing using equation below：
Test result is shown in Table 1.
Embodiment 2
Referring to Fig. 7～12, in figure numbering same as Example 1 represents identical meaning, does not repeat, the present embodiment and reality
The ultimate principle applying example 1 is identical, and methods described is identical, and somewhat different is：
A kind of seismic hardening mechanism of concrete column, including circular cross section concrete column, smooth epoxy resin layer, indulge
To with ring CFRP strip, the surface of described circular cross section concrete column 1 scribbles smooth epoxy resin layer, from scribbling
Epoxy resin layer cylinder top is to the uniform cementation in lower end longitudinal direction CFRP strip 2, downward from the surface top of concrete column, or from
Upwards, in often adjacent two longitudinal carbon fiber board interspace cementation ring closure CFRP strip 5, ring closes for concrete column bottom
Close CFRP strip and longitudinal CFRP strip upper surface flush, ring closure CFRP strip is fixed with circular closure gold
Belong to and reinforce hoop 3；
Described concrete column radius is 120 mm, highly 2000 mm.
Described longitudinal CFRP strip pastes 8.
Described concrete column both ends ring carbon fiber board stripe pitch encryption, encrypts length 480 mm.
According to《Code for design of concrete structures》GB50010-2010 specifies, the carrying maximal bending moment of unguyed concrete column
Can be calculated using equation below：
If there is steel bar corrosion in concrete column, according to《Code for design of concrete structures》GB50010-2010 specifies, rust
Erosion concrete column carries maximal bending moment and adopts equation below to calculate：
After Shockproof reinforcing method of the present invention is reinforced, according to《Concrete structure reinforcement design specification》
GB50367-2013 specifies, calculates the carrying maximal bending moment of concrete column after reinforcing using equation below：
Table 1 concrete column carries maximal bending moment test result
As can be seen from Table 1：Under the effect of specific axis power, after Shockproof reinforcing method of the present invention reinforces rectangular column, bearing capacity
Improve 8%；After reinforcing Corroded Reinforced Concrete rectangular column, concrete column bearing power increase 21%, can return to after reinforcing
Bearing capacity when unattacked, and have 5% raising.
Under the effect of specific axis power, after Shockproof reinforcing method of the present invention reinforces cylinder, bearing power increase 13%；Reinforce rust
After erosion Reinforced Concrete Circular Cylinder, concrete column bearing power increase 35%, bearing capacity when can return to unattacked after reinforcing,
And have 7% raising.
Claims (6)
1. the seismic hardening mechanism of a kind of concrete column, including rectangle or circular cross section concrete column, smooth epoxy resin
Layer, the CFRP strip of vertical and horizontal/ring is it is characterised in that described rectangular cross section concrete column（1）Two relative
Main stress cylinder scribbles smooth epoxy resin layer, fine to the uniform cementation in lower end longitudinal direction carbon from scribbling epoxy resin layer cylinder top
Dimension lath（2）, from concrete column top downwards, or from concrete column bottom upwards, in often adjacent two longitudinal CFRP strip
The horizontal CFRP strip of gap cementation（5）, horizontal CFRP strip and longitudinal CFRP strip upper surface flush, fine in horizontal carbon
It is fixed with rectangle on dimension lath and close metal reinforced hoop（3）；Or described circular cross section concrete column（1）Surface scribble flat
Whole epoxy resin layer, from scribble epoxy resin layer cylinder top to the uniform cementation in lower end longitudinal direction CFRP strip（2）, from coagulation
The surface top of earth pillar is downward, or from concrete column bottom upwards, in often adjacent two longitudinal carbon fiber board interspace cementation rings
To closure CFRP strip（5）, ring closes CFRP strip and longitudinal CFRP strip upper surface flush, in ring closure carbon
The metal reinforced hoop of circular closure is fixed with fiber lath（3）；Wherein, described metal reinforced hoop（3）For steel strap, at least
One fastening port, fastens port using bolt；
The Shockproof reinforcing method of the seismic hardening mechanism of described concrete column, comprises the following steps：
A. mixed rectangular cross section of polishing coagulates earth pillar（1）Two relative uneven places of main stress cylinder, or polishing rounded cross section
Surface concrete post（1）Surface, cleaning, repairing pit-hole；
B. in rectangular cross section concrete column（1）Two relative main stress cylinders or circular cross section concrete column（1）Table
Face uniform application epoxy resin layer, levelling；
C. step b epoxy resin be dried after, from scribble epoxy resin layer cylinder top to the uniform cementation in lower end longitudinal direction carbon fiber
Lath（2）, in adjacent two longitudinal carbon fiber reinforcement interspace cementations laterally or ring CFRP strip（5）, make longitudinal carbon fiber
Lath（2）With horizontal or ring CFRP strip（5）Upper surface flush；
D. in described horizontal or ring carbon-fibre strips（5）Upper surface is fixing to close metal reinforced hoop（3）；
E. the metal reinforced hoop to step d（3）Do preservative treatment.
2. the seismic hardening mechanism of concrete column according to claim 1 is it is characterised in that described epoxy resin layer
Thickness is 1.5 mm～2.3 mm.
3. the seismic hardening mechanism of concrete column according to claim 1 is it is characterised in that longitudinal CFRP strip（2）
Thickness 1 mm～4 mm, width 20 mm～100 mm, spacing 20 mm～200 mm；Ring or horizontal CFRP strip（5）Thick
Spend 1 mm～4 mm, width 20 mm～100 mm, spacing 100 mm～300 mm, concrete column both ends ring or horizontal carbon
Fiber lath（5）Spacing encrypts 50 mm～100 mm, encryption length >=2 times post cross-section lengths.
4. seismic hardening mechanism according to claim 1 is it is characterised in that the CFRP strip described in step c and cylinder
Joint, longitudinal CFRP strip（2）With ring or horizontal CFRP strip（5）Joint adopts carbon fiber bonded adhesives to bond,
Sag≤3 mm during 40 DEG C of carbon fiber bonded adhesives.
5. seismic hardening mechanism according to claim 1 is it is characterised in that metal reinforced hoop described in step d（3）For steel
Strap, at least one fastening port, port is fastened using bolt；Fixed using steel bonding glue with CFRP strip joint.
6. seismic hardening mechanism according to claim 1 is it is characterised in that the preservative treatment of step e includes rust cleaning, brushing
Red lead anti-corrosive paint and synthetic enamel step；Described red lead anti-corrosive paint and synthetic enamel are brushed 2～3 times respectively, per pass thick coating
25 μm～50 μm of degree, each brushing time interval >=4 h.
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| JP6591026B1 (en) * | 2018-11-01 | 2019-10-16 | 株式会社アイ・ティ・シ・コンサルティング | Reinforcing device for existing structure and attachment equipment for incidental facilities |
| CN112124858A (en) * | 2020-09-22 | 2020-12-25 | 九州职业技术学院 | Waste coal mine corridor reinforcing method |
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