CN103422587B - Intelligent-monitoring and maintenance-free buckling restrained brace of carbon fiber resistance sensing layer - Google Patents
Intelligent-monitoring and maintenance-free buckling restrained brace of carbon fiber resistance sensing layer Download PDFInfo
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- CN103422587B CN103422587B CN201310377565.7A CN201310377565A CN103422587B CN 103422587 B CN103422587 B CN 103422587B CN 201310377565 A CN201310377565 A CN 201310377565A CN 103422587 B CN103422587 B CN 103422587B
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- 229920000049 Carbon (fiber) Polymers 0.000 title claims abstract description 60
- 239000004917 carbon fiber Substances 0.000 title claims abstract description 60
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 60
- 238000012544 monitoring process Methods 0.000 title claims abstract description 12
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 45
- 239000010959 steel Substances 0.000 claims abstract description 45
- 239000006260 foam Substances 0.000 claims abstract description 10
- 102100040287 GTP cyclohydrolase 1 feedback regulatory protein Human genes 0.000 claims description 31
- 101710185324 GTP cyclohydrolase 1 feedback regulatory protein Proteins 0.000 claims description 31
- 238000003466 welding Methods 0.000 claims description 3
- 230000008901 benefit Effects 0.000 abstract description 3
- 230000007797 corrosion Effects 0.000 abstract description 3
- 238000005260 corrosion Methods 0.000 abstract description 3
- 239000011152 fibreglass Substances 0.000 abstract 7
- 238000005265 energy consumption Methods 0.000 abstract 5
- 238000012423 maintenance Methods 0.000 abstract 1
- 238000007493 shaping process Methods 0.000 abstract 1
- 230000008859 change Effects 0.000 description 6
- 238000005452 bending Methods 0.000 description 5
- 239000002131 composite material Substances 0.000 description 4
- 230000006378 damage Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000009172 bursting Effects 0.000 description 3
- 230000006735 deficit Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
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- Buildings Adapted To Withstand Abnormal External Influences (AREA)
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Abstract
The invention discloses an intelligent-monitoring and maintenance-free buckling restrained brace of a carbon fiber resistance sensing layer. The buckling restrained brace comprises an energy-consumption steel cores, a GFRP (glass fiber reinforced plastic) restrained section, waved sections, a shaping foam, a sensing layer electrode and a carbon fiber intelligent sensing layer, wherein the two ends of the GFRP restrained section are respectively provided with one waved section, the interior centers of the GFRP restrained section and the waved sections are provided with the energy-consumption steel core, the GFRP restrained section is symmetrically arranged along the energy-consumption steel core, the carbon fiber intelligent sensing layer is positioned in the GFRP restrained section and is parallelly arranged at the two sides of the long edge of the energy-consumption steel core, a gap is reserved between the carbon fiber intelligent sensing layer and the energy-consumption steel core, the carbon fiber intelligent sensing layer is connected with the sensing layer electrode, and the shaped foam is filled into the gap of the integral structure which is formed by connecting the carbon fiber intelligent sensing layer and the GFRP restrained section. The buckling restrained brace has the advantages that the structure is reasonable, the self weight is light, the corrosion resistance is realized, the maintenance is free, and the intelligent monitoring is realized.
Description
Technical field
The present invention relates to a kind of buckling restrained brace technology, be specifically related to the non-maintaining buckling restrained brace of a kind of carbon fiber resistance sensing layer intellectual monitoring.
Background technology
Existing buckling restrained brace can the dynamic characteristics of modified node method thing preferably, improves its antivibration or anti-seismic performance.But existing support adopts passive type restriction mode, cannot know the duty of support, the damage status of support can not be described.
Summary of the invention
The object of the invention is to the defect that cannot reflect self duty for existing buckling restrained brace, propose a kind of Novel steel-composite material buckling restrained brace with intellectual monitoring function.
The technical solution used in the present invention is: the non-maintaining buckling restrained brace of a kind of carbon fiber resistance sensing layer intellectual monitoring, comprise power consumption steel core, GFRP confinement section, waveform saves, contoured foam, sensing layer electrode and Intelligent carbon fiber sensing layer, the two ends of described GFRP confinement section are provided with waveform joint, the inside center of GFRP confinement section and waveform joint is provided with power consumption steel core, GFRP confinement section is arranged symmetrically with along power consumption steel core, described Intelligent carbon fiber sensing layer is positioned at GFRP confinement section, Intelligent carbon fiber sensing layer is set in parallel in the both sides, long limit of power consumption steel core, gap is left between Intelligent carbon fiber sensing layer and power consumption steel core, Intelligent carbon fiber sensing layer and sensing layer Electrode connection, Intelligent carbon fiber sensing layer and GFRP confinement section are connected to form in integrally-built space and are filled with contoured foam.
As preferably, described power consumption steel core welding edges has two stiffening ribs, forms junction plate, is provided with the bolt hole be connected with structure node plate above.
The present invention passes through integral forming technique, Intelligent carbon fiber layer and GFRP confinement section form an entirety, Intelligent carbon fiber sensing layer and GFRP confinement section parcel contoured foam, contoured foam is the mould of GFRP confinement section and Intelligent carbon fiber sensing layer in integral forming technique, draw silver-colored wire in Intelligent carbon fiber sensing layer as electrode, power consumption steel core is arranged in the GFRP confinement section and Intelligent carbon fiber sensing layer that are arranged symmetrically with.
Beneficial effect: the present invention utilizes the duty of the monitoring power consumption steel core of Intelligent carbon fiber sensing layer, and then support works performance and degree of impairment are described, Intelligent carbon fiber sensing layer is composite material, can well and the fusion of GFRP composite constraining section, and the overall corrosion resistance of formation is good.Adopt integral forming technique once can complete the making of sensing layer and confinement section, simple and effective.The present invention innovates from the structural form of buckling restrained brace and sensor material aspect, have rational in infrastructure, from heavy and light, corrosion-resistant, non-maintaining, can the feature of intelligent monitoring.Novel buckling restrained brace reduces the vibratory response (as earthquake, wind shake) of building structure except having, playing outside the advantage of vibration damping (shake) protective effect, also possess the advantage that duty is known, degree of impairment can be looked into, is a kind of novel intelligent structural element.
Accompanying drawing explanation
Fig. 1 is that the present invention supports overall structure schematic diagram;
Fig. 2 is supporting section schematic diagram of the present invention;
Fig. 3-7 is buckling restrained brace deformation mechanisms figure.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention will be further described.
As illustrated in fig. 1 and 2, the non-maintaining buckling restrained brace of a kind of carbon fiber resistance sensing layer intellectual monitoring, comprise power consumption steel core 1, GFRP confinement section 2, waveform joint 3, contoured foam 4, sensing layer electrode 5 and Intelligent carbon fiber sensing layer 6, the two ends of described GFRP confinement section 2 are provided with waveform joint 3, the inside center of GFRP confinement section 2 and waveform joint 3 is provided with power consumption steel core 1, GFRP confinement section 2 is arranged symmetrically with along power consumption steel core 1, described Intelligent carbon fiber sensing layer 6 is positioned at GFRP confinement section 2, Intelligent carbon fiber sensing layer 6 is set in parallel in the both sides, long limit of power consumption steel core 1, gap is left between Intelligent carbon fiber sensing layer 6 and power consumption steel core 1, Intelligent carbon fiber sensing layer 6 is connected with sensing layer electrode 5, Intelligent carbon fiber sensing layer 6 and GFRP confinement section 2 are connected to form in integrally-built space and are filled with contoured foam 4.Described power consumption steel core 1 welding edges has two stiffening ribs, forms junction plate, is provided with the bolt hole be connected with structure node plate above.
The operating principle of buckling restrained brace of the present invention is:
During buckling restrained brace work, power consumption steel core and outside GFRP confinement section and Intelligent carbon fiber sensing layer integrally stressed, but compared to power consumption steel core stress unit, waveform joint axial rigidity is less, Axial force distribution is little to outside GFRP confinement section and Intelligent carbon fiber sensing layer, supports the axial push-pull power of bearing and can be considered and is born by power consumption steel core stress unit completely.Power consumption steel core stress unit can reach surrender when tension; During pressurized, suppose that supporting suffered primitive axis power is P, as shown in Figure 3, power consumption steel core stress unit produces lateral deformation, first the maximum position of power consumption steel core stress unit sidesway contacts with Intelligent carbon fiber sensing layer, power consumption steel core stress unit reaches lowest-order buckling mode, and as shown in Figure 4, now GFRP confinement section and Intelligent carbon fiber sensing layer bend; Along with the increase of axle power, the lateral deformation of power consumption steel core stress unit increases, due to the development that the constraint restriction power consumption steel core stress unit of GFRP confinement section and Intelligent carbon fiber sensing layer is out of shape on the contact point, power consumption steel core stress unit will develop to high-order buckling mode, as illustrated in figs. 5-7, GFRP confinement section and the flexural deformation of Intelligent carbon fiber sensing layer increase thereupon.Development like this is gone down, as long as GFRP confinement section and Intelligent carbon fiber sensing layer have enough bending rigidities, supporting suffered axle power can increase until the steel core stress unit that consumes energy reaches total cross-section surrender always, now GFRP confinement section and Intelligent carbon fiber sensing layer do not bend destruction, but power consumption steel core now can local by the bursting of Intelligent carbon fiber sensing layer, as Fig. 7.
Change and the change of mean strain suffered by it of the resistance change rate of Intelligent carbon fiber sensing layer present good uniformity, and have the satisfied linearity and good repeatability, creep is very little, and stability is better.By power supply and electrode, input dc power in Intelligent carbon fiber sensing layer, measures the voltage of Intelligent carbon fiber layer at another electrode place, obtain the resistance change rate of Intelligent carbon fiber sensing layer according to Ohm's law.According to the linear relationship between Intelligent carbon fiber sensing layer resistance change rate and mean strain, obtain the mean strain of Intelligent carbon fiber sensing layer.After Intelligent carbon fiber sensing layer local is by bursting, lose delivered current ability, another electrode place measures resistance and becomes very large, and Intelligent carbon fiber sensing layer generation local damage is now described, power consumption steel core very large bending deformation occurs and surrender.
When power consumption steel core bending deformation hour in support, the resistance change rate of carbon fiber sensing layer reflects the strain level of GFRP confinement section and Intelligent carbon fiber sensing layer, in conjunction with steel-composite material buckling restrained brace Bearing capacity model, just can be obtained the bending deformation of power consumption steel core by the strain of Intelligent carbon fiber sensing layer, the flexing duty of reflection power consumption steel core; When in supporting, power consumption steel core bending deformation is large, carbon fiber sensing layer steel core bursting of being consumed energy in local is deactivated, and measure and obtain Resistance Maximum, illustrate that Intelligent carbon fiber sensing layer exists local damage, now power consumption steel core enters extreme working position.Power consumption steel core duty can reflect the service condition and integrality that support.
It should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.The all available prior art of each ingredient not clear and definite in the present embodiment is realized.
Claims (2)
1. the non-maintaining buckling restrained brace of carbon fiber resistance sensing layer intellectual monitoring, it is characterized in that: comprise power consumption steel core, GFRP confinement section, waveform saves, contoured foam, sensing layer electrode and Intelligent carbon fiber sensing layer, the two ends of described GFRP confinement section are provided with waveform joint, the inside center of GFRP confinement section and waveform joint is provided with power consumption steel core, GFRP confinement section is arranged symmetrically with along power consumption steel core, described Intelligent carbon fiber sensing layer is positioned at GFRP confinement section, Intelligent carbon fiber sensing layer is set in parallel in the both sides, long limit of power consumption steel core, gap is left between Intelligent carbon fiber sensing layer and power consumption steel core, Intelligent carbon fiber sensing layer and sensing layer Electrode connection, Intelligent carbon fiber sensing layer and GFRP confinement section are connected to form in integrally-built space and are filled with contoured foam.
2. the non-maintaining buckling restrained brace of carbon fiber resistance sensing layer intellectual monitoring according to claim 1, is characterized in that: described power consumption steel core welding edges has two stiffening ribs, forms junction plate, is provided with the bolt hole be connected with structure node plate above.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310377565.7A CN103422587B (en) | 2013-08-26 | 2013-08-26 | Intelligent-monitoring and maintenance-free buckling restrained brace of carbon fiber resistance sensing layer |
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| CN201310377565.7A CN103422587B (en) | 2013-08-26 | 2013-08-26 | Intelligent-monitoring and maintenance-free buckling restrained brace of carbon fiber resistance sensing layer |
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| CN103422587A CN103422587A (en) | 2013-12-04 |
| CN103422587B true CN103422587B (en) | 2015-06-03 |
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| JP6506564B2 (en) * | 2015-02-04 | 2019-04-24 | 川崎重工業株式会社 | Condition monitoring device of leaf spring of bogie for railway vehicle |
| CN105464238A (en) * | 2016-01-06 | 2016-04-06 | 河南理工大学 | Buckling constraint support internally provided with steel tube and externally covered with fiber pipe |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5193323A (en) * | 1989-02-23 | 1993-03-16 | Kajima Corporation | Safety monitoring method for use in active seismic response and wind control system |
| CN101575884A (en) * | 2009-05-27 | 2009-11-11 | 清华大学 | Reinforced-fiber composite constraining anti-buckling energy-consumption steel timbering |
| CN102797185A (en) * | 2012-07-10 | 2012-11-28 | 东南大学 | Intelligent FRP (Fiber Reinforced Polymer) composite rib based on carbon fiber distribution type sensing and large-scale production process thereof |
| CN103216023A (en) * | 2013-04-19 | 2013-07-24 | 清华大学 | Fiberglass-reinforced plastics (FRP) section bar buckling-resisting supporting structure |
| KR20130091807A (en) * | 2012-02-09 | 2013-08-20 | (주) 캐어콘 | Reinforcing concrete structures using hybrid bracing system |
| CN203420370U (en) * | 2013-08-26 | 2014-02-05 | 南京工业大学 | Carbon fiber resistance sensing layer intelligent monitoring maintenance-free buckling restraining support |
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2013
- 2013-08-26 CN CN201310377565.7A patent/CN103422587B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5193323A (en) * | 1989-02-23 | 1993-03-16 | Kajima Corporation | Safety monitoring method for use in active seismic response and wind control system |
| CN101575884A (en) * | 2009-05-27 | 2009-11-11 | 清华大学 | Reinforced-fiber composite constraining anti-buckling energy-consumption steel timbering |
| KR20130091807A (en) * | 2012-02-09 | 2013-08-20 | (주) 캐어콘 | Reinforcing concrete structures using hybrid bracing system |
| CN102797185A (en) * | 2012-07-10 | 2012-11-28 | 东南大学 | Intelligent FRP (Fiber Reinforced Polymer) composite rib based on carbon fiber distribution type sensing and large-scale production process thereof |
| CN103216023A (en) * | 2013-04-19 | 2013-07-24 | 清华大学 | Fiberglass-reinforced plastics (FRP) section bar buckling-resisting supporting structure |
| CN203420370U (en) * | 2013-08-26 | 2014-02-05 | 南京工业大学 | Carbon fiber resistance sensing layer intelligent monitoring maintenance-free buckling restraining support |
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