CN209496000U - BFRP formwork concrete removes damage monitoring sensor layout stracture - Google Patents
BFRP formwork concrete removes damage monitoring sensor layout stracture Download PDFInfo
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- CN209496000U CN209496000U CN201920059820.6U CN201920059820U CN209496000U CN 209496000 U CN209496000 U CN 209496000U CN 201920059820 U CN201920059820 U CN 201920059820U CN 209496000 U CN209496000 U CN 209496000U
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Abstract
The utility model proposes a kind of BFRP formwork concrete to remove damage monitoring sensor layout stracture, based on concrete pier, the BFRP putamina of concrete pier periphery is set and is arranged between concrete pier and BFRP putamina concrete capable of not dispersing filled layer, it is characterised by comprising: PZT patch on the outside of intelligent aggregate, BFRP putamina in concrete capable of not dispersing filled layer, the signal excitation for being separately connected intelligent aggregate and PZT patch and reception device and the host computer of connection signal excitation and reception device.Have the advantages that sensing is sensitive, it is simple to lay, safe and reliable, measurement range is big, realize the actively monitoring to the removing damage of reinforced concrete bridge pier, to realize the life-cycle health monitoring after concrete pier reinforcing, safe construction and the use for ensuring reinforced concrete bridge pier have good engineering safety guaranteeing role.
Description
Technical field
The utility model relates to concrete pier field of reinforcement, more particularly to a kind of concrete pier that is used for not to drain quickly
The sensor of the BFRP formwork concrete removing damage monitoring of reinforcing is laid and method.
Background technique
The use condition and environment of bridge submerged structure are more severe compared with boat structure.Such as: underwater higher static state
Stress and fatigue stress, river water wash away, ship collision, floating ice and earthquake attack, environmental load and bridge superstructure transmitting
Work load etc. easily leads to bridge submerged structure and forms all kinds of damage defects, and is not easy to be found, and is related to bridge bearing energy
Power and durability reduce, and seriously jeopardize the service life of traffic safety and bridge.Traditionally, submerged structure reinforcing needs underwater equipment or makes
With interim steel sheet-pile cofferdam, these methods require to take a substantial amount of time and expense, and navigation channel space is occupied in work progress,
Social influence is big.In order to overcome above-mentioned deficiency, rapid reinforcement technology is not drained and is come into being.
Not draining rapid reinforcement technology is pasted and 6 layers of BFRP(basalt fiber composite material of tensioning by epoxy resin)
Cloth carries out being bolted the putamina being composed using stainless steel plate, and circumferential direction surrounds concrete pier to be reinforced, upper and lower Ge Liu
The unguyed end of 20mm, the reserved gap 40mm of circumferential direction pour non-dispersible underwater concrete and are reinforced.By the height of industrialized production
The prefabricated BFRP formwork of durability, which is surrounded, carries out presstressed reinforcing steel progress tensioning, anchor assembled, to formwork internal reservation to reinforced bridge pier
Gu and preservative treatment finally treats reinforced bridge pier with non-dispersible underwater concrete to obtain the effect for pre-tightening formwork hoop constraint
Gap between formwork carries out the cementation of fissures.This reinforcement means is that submerged structure reinforcing creates dry operating environment, is added
Gu work is no different with land, working environment and improved safety, the quality tool of construction is reliably guaranteed.The especially many bridges in China
The structural strengthening of pier bottom portion setting coupling beam is usually present certain difficulty, and concrete pier does not drain rapid reinforcement technology and utilizes BFRP
Template of the formwork as packing material when reinforcing, saves rolled steel dosage, and due to live quick-assembling, reinforcing speed is fast, using not
Disperse Concrete Filled, belong to no drainage construction, there is more significant reduction relative to conventional method in terms of duration and expense.
For there is the bridge structure damaged, Reinforcement Measures appropriate are taken, structure can be made to restore to a certain extent
Original reliability, and prolong the service life.From the point of view of Practical Project, the destruction of reinforced bridge pier is occurred by formwork and fill concrete
Removing, and lead to the early damage of reinforced bridge pier.This kind of destruction is brittle break, and destruction generation is very unexpected, without omen, and
It hides under water, so being difficult to observe directly when formwork being removed with concrete the problems such as.
Concrete pier does not drain in rapid reinforcement, and BFRP formwork and fill concrete are used to repair as periphery protection structure
Bearing capacity and the common stress of main structure multiple and that promote bridge pier.If there is removing damage, it will the safety for influencing bridge pier makes
With being caused a significant threat to the lives and properties of people.
In the prior art, there are many method for carrying out removing damage monitoring to fibrous composite ruggedized construction, such as light
Nanofarads, supersonic testing method etc., but optical fiber shear resistance is poor, and sensing testing system is expensive, and ultrasonic method needs couplant to make
Sound wave penetrates measured object, more demanding to the technical level of operating condition and operator.BFRP formwork reinforced bridge pier under water,
Hidden, the complicated feature of environment makes these methods quickly and efficiently can not carry out removing damage to reinforced concrete bridge pier
Monitoring.
Utility model content
The utility model is realized by installation piezoelectric intelligent sensor to BFRP formwork and reinforced concrete removing damage feelings
Condition on-line real time monitoring, it is ensured that the safe handling of reinforced concrete bridge pier.Concrete pier is used for using piezoceramic transducer
The BFRP formwork concrete removing damage monitoring for not draining rapid reinforcement, have small in size, low energy consumption, high sensitivity, response are fast,
It is low in cost, position that structure most easily damages can be embedded to as required, be also convenient for the advantages that outer patch arrangement, laid by it and
The structure health monitoring method of composition can sensitively monitor BFRP formwork and concrete removing degree of impairment in real time online, right
The normal use of structure provides alert, and for concrete pier, trouble free service provides technical support in an underwater environment.
The utility model specifically uses following technical scheme:
A kind of BFRP formwork concrete removing damage monitoring sensor layout stracture, based on concrete pier, setting mixed
Do not disperse between the BFRP putamina and concrete pier and BFRP putamina that solidifying soil bridge pier periphery is reinforced for concrete pier
Concrete Filled layer characterized by comprising the PZT on the outside of intelligent aggregate, BFRP putamina in concrete capable of not dispersing filled layer
(piezoelectric ceramics) patch, the signal excitation for being separately connected intelligent aggregate and PZT patch and reception device and connection signal excitation
With the host computer of reception device.
Preferably, the intelligent aggregate is arranged on BFRP putamina inner sidewall；The PZT patch is arranged in intelligent aggregate institute
On the corresponding BFRP putamina lateral wall in position.
Preferably, the intelligent aggregate and PZT patch are provided with multiple groups.
Preferably, the intelligent aggregate and piezoelectric ceramics patch are provided with 4 groups, are symmetrically distributed in BFRP putamina in circumferential direction
Middle part.
Preferably, the signal excitation and reception device use NIUSB-6363 series board, and excitation end passes through shielding
Conducting wire is connect with intelligent aggregate, and receiving end is connect by shielded wire with PZT patch；The host computer is PC.
Preferably, the intelligent aggregate includes the positive and negative antarafacial PZT piece of circle, the waterproof coating, ring for being welded with shielded wire
Oxygen resin protective layer and punching block；The PZT patch includes rectangular positive and negative coplanar PZT piece, the waterproof coating for being welded with shielded wire
With epoxy resin protective layer.
Preferably, the diameter of the positive and negative antarafacial PZT piece of the circle is 10mm, is 20mm with a thickness of 0.5mm, punching block diameter；
A length of 15mm of the rectangular positive and negative coplanar PZT piece, width 10mm, with a thickness of 1mm；The shielded wire diameter is 2.5mm；Institute
The spacing for stating intelligent aggregate and PZT patch is 35mm.
The utility model and its preferred embodiment have sense it is sensitive, lay big excellent of simple, safe and reliable, measurement range
Point and is pasted by the way that intelligent aggregate is arranged in the concrete capable of not dispersing filled layer in BFRP formwork as driver
PZT patch on BFRP formwork lateral wall applies pumping signal to driver as sensor, while sensor receives signal,
To enable the damage of removing between formwork and fill concrete to characterize by receiving the signal obtained, realize to reinforcing coagulation
The actively monitoring of native bridge pier removing damage, to realize the life-cycle health monitoring after concrete pier reinforcing, it is ensured that reinforce mixed
The safe construction of solidifying soil bridge pier and use, have good engineering safety guaranteeing role.
Detailed description of the invention
With reference to the accompanying drawings and detailed description to the further details of explanation of the utility model:
Fig. 1 is 1 overall structure diagram of the utility model embodiment；
Fig. 2 is intelligent aggregate structural schematic diagram in the utility model embodiment；
Fig. 3 is PZT paster structure schematic diagram in the utility model embodiment；
Fig. 4 is that 2 intelligent aggregate of the utility model embodiment and PZT patch lay mode schematic cross-sectional view；
Fig. 5 is that 2 intelligent aggregate of the utility model embodiment and PZT patch lay mode schematic top plan view；
Fig. 6 is that the utility model implements monitoring flow diagram；
In figure: 1- concrete pier；2- concrete capable of not dispersing filled layer；3-BFRP putamina；4,SA1,SA2,SA3,SA4-
Intelligent aggregate；5, P1, P2, P3, P4-PZT patch；The excitation of 6- signal and reception device；7- host computer；81- waterproof layer (intelligent bone
Material)；82- waterproof layer (PZT patch)；9- shielded wire；The round positive and negative antarafacial PZT piece of 10-；11- epoxy resin；12- punching block；
The rectangular positive and negative coplanar ZPT piece of 13-.
Specific embodiment
For the feature and advantage of this patent can be clearer and more comprehensible, 2 embodiments is cited below particularly, and cooperate attached drawing, makees detailed
Carefully it is described as follows:
As shown in Figure 1, the laying of sensor is based on including the not reinforced place concrete pier 1(in embodiment 1
Reason), be arranged in concrete pier periphery for concrete pier reinforce BFRP putamina 3 and be arranged in 1 and of concrete pier
The concrete pier of concrete capable of not dispersing filled layer 2 between BFRP putamina 3 does not drain rapid reinforcement structure.Do not disperse wherein to mix
Solidifying soil filled layer 2 pours to be formed using non-dispersible underwater concrete.
Used device includes: the intelligent aggregate 4 being arranged in concrete capable of not dispersing filled layer 2, by pasting setting
PZT patch 5 on 3 lateral wall of BFRP putamina, the signal excitation and reception device for being separately connected intelligent aggregate 4 and PZT patch 5
6 and connection signal excitation and reception device 6 host computer 7.
Wherein, it is contemplated that reinforced concrete bridge pier 1 is used as pull-down component, formwork and internal coagulation in the middle part of column during carrying
Soil is easy to happen stripping damage, and therefore, sensor is preferably laid in the middle part of column on the inside of BFRP formwork and corresponding outside.Therefore, exist
In the present embodiment, intelligent aggregate 4 is arranged on 3 inner sidewall of BFRP putamina, as piezoelectric ceramic actuator；The setting of PZT patch 5 exists
On corresponding 3 lateral wall of BFRP putamina in 4 position of intelligent aggregate, as piezoceramic transducer.
In the present embodiment, signal excitation and reception device 6 use NIUSB-6363 series board, which passes through excitation
End emits a frequency-swept sine wave signal, and signal is transmitted by media interior, acquires signal in receiving end, has automatic, real-time
Transmitting and the function of receiving signal after initial setting up is good, are not required to subsequent human intervention operation, and excitation end passes through shielded wire
9 connect with intelligent aggregate 4, can emit different frequency sine wave signal, and receiving end passes through shielded wire 9 and piezoelectric ceramics patch
5 connections；Host computer 7 is PC, can be used for showing, stores and handle data.
As shown in Fig. 2, intelligent aggregate 4 include the positive and negative antarafacial PZT piece 10 of circle for being welded with shielded wire 9, waterproof coating,
11 protective layer of epoxy resin and punching block 12.Its positive and negative antarafacial PZT piece 10 of circle by shielded wire 9 is welded, through outer painting waterproof
After layer 81, it is embedded in 12 kernel of section of punching block, shielded wire 9 is pierced by from the hole that punching block surface is reserved, and finally uses epoxy resin 11
It is packaged.Wherein round positive and negative antarafacial PZT piece 10 is arranged in middle position, bonded and encapsulated by epoxy resin 11 from
And realize round positive and negative antarafacial PZT piece 10 and extraneous insulation, moisture-proof, heat-insulated and other effects, and select and be similar to aggregate
The punching block 12 of size is used as surface layer protection material, and this packaging method does not need removal punching block 12, sound source not only can be enhanced
Directional vibration inhibits the radial vibration of intelligent aggregate 4 to transmit stronger signal, can also shield external noise and enter intelligent aggregate
4, effectively increase signal stabilization and intensity.
As shown in figure 3, PZT patch 5 include be welded with the rectangular positive and negative coplanar PZT piece 13 of shielded wire 9, waterproof coating and
11 protective layer of epoxy resin.It is direct after outer painting waterproof layer 82 by the rectangular positive and negative coplanar PZT piece 13 for being welded with shielded wire 9
It is pasted onto 3 outer surface of BFRP putamina, in order to protect thin and crisp PZT patch, surface is used epoxy resin 11 to wrap up again, is conducive to
Potsherd is directly contacted with 3 main structure of BFRP putamina, reduces the interference of external environment.
In the present embodiment, as a preference, the diameter of round positive and negative antarafacial PZT piece 10 be 10mm, with a thickness of
0.5mm, 12 diameter of punching block are 20mm；A length of 15mm of rectangular positive and negative coplanar PZT piece 13, width 10mm, with a thickness of 1mm；Shielding
9 diameter of conducting wire is 2.5mm；The spacing of intelligent aggregate 4 and PZT patch 5 is 35mm.
As shown in Figure 4, Figure 5, in the 2nd embodiment, the difference with the 1st embodiment is only that, uses 4 groups of intelligence
Aggregate 4 and PZT patch 5 can be realized multiple groups and more comprehensively monitor as driving and sensing device.It is also contemplated that reinforcing
Concrete pier 1 is used as pull-down component, and formwork and inner concrete are easy to happen stripping damage in column during carrying, therefore will
4 groups of intelligent aggregates (SA1, SA2, SA3, SA4) and PZT patch (P1, P2, P3, P4), which are in that circumferential direction is symmetrical, is set to BFRP film
The middle part of shell 3, to realize optimum efficiency.
In terms of BFRP formwork concrete removes damage monitoring method, comprising the following steps:
Step S1: intelligent aggregate 4 is embedded in the concrete capable of not dispersing between concrete pier 1 and BFRP putamina 3 and is filled out
It fills in layer 2, and PZT patch 5 is pasted on the lateral wall of the corresponding BFRP putamina 3 in 4 position of intelligent aggregate, signal is swashed
It encourages and is connect by shielded wire 9 with intelligent aggregate 4 with the excitation end of reception device 6, receiving end is made pottery by shielded wire 9 and piezoelectricity
Porcelain patch 5 connects, and signal excitation and reception device 6 are connect with host computer 7；
Step S2: signal excitation is carried out to intelligent aggregate 4 by signal excitation and reception device 6, and receives piezoelectric ceramics
The signal that patch 5 returns；Received signal is transmitted to host computer 7 with reception device 6 by signal excitation；Wherein, in order to more smart
Variation of the true reflection signal amplitude in communication process, can choose 100 kHz, 150 kHz, 200 kHz, 250 kHz,
300 kHz carry out different excitations.Setting can also choose 150 closest to concrete resonant frequency for convenience in Practical Project
KHz is motivated.
Host computer 7 shows the signal received by screen simultaneously, preliminary anticipation processing is carried out, to send out
It adopts remedial measures in time when now abnormal.In order to exclude the influence of environment, host computer 7 can be set to when storing signal automatically into
Row filtering, guarantees the real effectiveness of signal.
Step S3: as shown in fig. 6, according to the time domain specification for collecting signal, to the energy for receiving signal under each monitoring operating condition
Amount is analyzed, and judges removing degree of impairment using damage criterion:
Signal energy valueIs defined as:
In formula,The sequence signal at a certain moment in representation signal；
Damage criterionIs defined as:
In formula,The signal energy value under each monitoring operating condition is represented,Represent the signal energy value under health status.
In monitoring process, if there is crack between BFRP formwork and concrete capable of not dispersing filled layer 2, Jie is transmitted
Matter changes, and signal decaying, corresponding energy value reduces, and with the development and extension in crack, signal decaying can be more serious.
Therefore,Value change within the scope of 0-1,Value is bigger, illustrates that structural damage is more serious,=1, then formwork
Be broken or formwork and concrete between complete unsticking, structure destroy.
Other than the method that step S3 is provided, acquisition signal can also be analyzed and processed with other a variety of methods,
Damage implementation on-line real time monitoring and early warning are removed under load and environmental activity after reinforcing for pier column, realizes concrete after reinforcing
The life-cycle of bridge pier 1 monitors, and provides reference for the safe handling of Underwater Engineering.
This patent is not limited to above-mentioned preferred forms, anyone can obtain other each under the enlightenment of this patent
The BFRP formwork concrete of kind form removes damage monitoring sensor layout stracture, all according to present utility model application the scope of the patents institute
The equivalent changes and modifications done should all belong to the covering scope of this patent.
Claims (7)
1. a kind of BFRP formwork concrete removes damage monitoring sensor layout stracture, based on concrete pier, it is arranged in coagulation
Concrete capable of not dispersing filled layer between the BFRP putamina and concrete pier and BFRP putamina of native bridge pier periphery, feature
It is, comprising: the PZT patch on the outside of intelligent aggregate, BFRP putamina in concrete capable of not dispersing filled layer is separately connected intelligent bone
The excitation of the signal of material and PZT patch and reception device and the host computer of connection signal excitation and reception device.
2. BFRP formwork concrete according to claim 1 removes damage monitoring sensor layout stracture, it is characterised in that:
The intelligent aggregate is arranged on BFRP putamina inner sidewall；The PZT patch setting is corresponding in intelligent aggregate position
On BFRP putamina lateral wall.
3. BFRP formwork concrete according to claim 2 removes damage monitoring sensor layout stracture, it is characterised in that:
The intelligent aggregate and PZT patch are provided with multiple groups.
4. BFRP formwork concrete according to claim 3 removes damage monitoring sensor layout stracture, it is characterised in that:
The intelligent aggregate and PZT patch are provided with 4 groups, and the middle part of BFRP putamina is symmetrically distributed in circumferential direction.
5. BFRP formwork concrete according to claim 1 removes damage monitoring sensor layout stracture, it is characterised in that:
The signal excitation and reception device use NIUSB-6363 series board, and excitation end is connected by shielded wire and intelligent aggregate
It connects, receiving end is connect by shielded wire with PZT patch；The host computer is PC.
6. BFRP formwork concrete according to claim 1 removes damage monitoring sensor layout stracture, it is characterised in that:
The intelligent aggregate includes the positive and negative antarafacial PZT piece of circle, waterproof coating, epoxy resin protective layer and the steel for being welded with shielded wire
Mould；The PZT patch includes rectangular positive and negative coplanar PZT piece, waterproof coating and the epoxy resin protective layer for being welded with shielded wire.
7. BFRP formwork concrete according to claim 6 removes damage monitoring sensor layout stracture, it is characterised in that:
The diameter of the positive and negative antarafacial PZT piece of circle is 10mm, is 20mm with a thickness of 0.5mm, punching block diameter；It is described rectangular positive and negative coplanar
A length of 15mm of PZT piece, width 10mm, with a thickness of 1mm；The shielded wire diameter is 2.5mm；The intelligent aggregate and PZT
The spacing of patch is 35mm.
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| CN109596712A (en) * | 2019-01-15 | 2019-04-09 | 福州大学 | BFRP formwork concrete removes damage monitoring sensor layout stracture and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109596712A (en) * | 2019-01-15 | 2019-04-09 | 福州大学 | BFRP formwork concrete removes damage monitoring sensor layout stracture and method |
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