CN103422587A - 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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- CN103422587A CN103422587A CN2013103775657A CN201310377565A CN103422587A CN 103422587 A CN103422587 A CN 103422587A CN 2013103775657 A CN2013103775657 A CN 2013103775657A CN 201310377565 A CN201310377565 A CN 201310377565A CN 103422587 A CN103422587 A CN 103422587A
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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 46
- 239000010959 steel Substances 0.000 claims abstract description 46
- 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
- 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
- 238000005452 bending Methods 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 239000002131 composite material Substances 0.000 description 4
- 230000006378 damage Effects 0.000 description 4
- 230000009172 bursting Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000006735 deficit Effects 0.000 description 2
- 238000011161 development Methods 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
- 238000005259 measurement Methods 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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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 improve the dynamic characteristics of works preferably, improves its antivibration or anti-seismic performance.But existing the support adopts the passive type restriction mode, can't know the duty of support, and the damage status of support can not be described.
Summary of the invention
The object of the invention is to can't reflect for existing buckling restrained brace the defect of self duty, propose a kind of Novel steel with intellectual monitoring function-composite material buckling restrained brace.
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 the power consumption steel core, the GFRP confinement section, the waveform joint, contoured foam, sensing layer electrode and Intelligent carbon fiber sensing layer, the two ends of described GFRP confinement section are provided with the waveform joint, the inside center of GFRP confinement section and waveform joint is provided with the power consumption steel core, the GFRP confinement section is arranged symmetrically with along the power consumption steel core, described Intelligent carbon fiber sensing layer is positioned at the GFRP confinement section, the Intelligent carbon fiber sensing layer is set in parallel in the both sides, long limit of power consumption steel core, leave gap between Intelligent carbon fiber sensing layer and power consumption steel core, the Intelligent carbon fiber sensing layer is connected with the sensing layer electrode, 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 end is welded with two stiffening ribs, forms junction plate, and the above is provided with the bolt hole be connected with the structure node plate.
The present invention passes through integral forming technique, Intelligent carbon fiber layer and GFRP confinement section form an integral body, Intelligent carbon fiber sensing layer and GFRP confinement section parcel contoured foam, the mould that contoured foam is GFRP confinement section and Intelligent carbon fiber sensing layer in integral forming technique, draw silver-colored wire in the Intelligent carbon fiber sensing layer as electrode, the power consumption steel core is arranged in GFRP confinement section and the Intelligent carbon fiber sensing layer be 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 explanation support works performance and degree of impairment, the Intelligent carbon fiber sensing layer is composite material, can be 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 structural form and the sensor material aspect of buckling restrained brace, have rational in infrastructure, from heavy and light, corrosion-resistant, non-maintaining, characteristics that can intelligent monitoring.Novel buckling restrained brace, except having the vibratory response that reduces building structure (as earthquake, wind shake etc.), plays outside the advantage of vibration damping (shake) protective effect, also possesses the advantage that duty is known, degree of impairment can be looked into, and is a kind of novel intelligent structural element.
The accompanying drawing explanation
Fig. 1 is that the present invention supports the overall structure schematic diagram;
Fig. 2 is supporting section schematic diagram of the present invention;
Fig. 3-7 are buckling restrained brace deformation mechanisms figure.
The specific embodiment
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, leave gap 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 is connected to form in integrally-built space and is filled with contoured foam 4 with GFRP confinement section 2.Described power consumption steel core 1 end is welded with two stiffening ribs, forms junction plate, and the above is provided with the bolt hole be connected with the structure node plate.
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 are done as a whole stressed, but than power consumption steel core stress unit, the waveform nodal axisn is less to rigidity, axle power is assigned to outside GFRP confinement section and Intelligent carbon fiber sensing layer seldom, supports the axial push-pull power of bearing and can be considered fully and is born by power consumption steel core stress unit.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, at first the position of power consumption steel core stress unit sidesway maximum contacts with the Intelligent carbon fiber sensing layer, power consumption steel core stress unit reaches the lowest-order buckling mode, and as shown in Figure 4, now GFRP confinement section and Intelligent carbon fiber sensing layer bend; Increase along with axle power, the lateral deformation of power consumption steel core stress unit increases, the development of being out of shape on contact point due to the constrained of GFRP confinement section and Intelligent carbon fiber sensing layer power consumption steel core stress unit, power consumption steel core stress unit will develop to the high-order buckling mode, as shown in Fig. 5-7, GFRP confinement section and the flexural deformation of Intelligent carbon fiber sensing layer increase thereupon.So development is gone down, as long as GFRP confinement section and Intelligent carbon fiber sensing layer have enough bending rigidities, support that suffered axle power can increase always until the steel core stress unit that consumes energy reaches the total cross-section surrender, GFRP confinement section and the Intelligent carbon fiber sensing layer destruction that do not bend now, but the power consumption steel core now can be in part by the bursting of Intelligent carbon fiber sensing layer, as Fig. 7.
The variation of the variation mean strain suffered with it of the resistance change rate of Intelligent carbon fiber sensing layer presents good uniformity, has the satisfied linearity and good repeatability, and creep is very little, and stability is better.By power supply and electrode, input dc power in the Intelligent carbon fiber sensing layer, at the voltage of another electrode place measurement Intelligent carbon fiber layer, 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 part is by bursting, lose the delivered current ability, another electrode place measures resistance and becomes very greatly, and Intelligent carbon fiber sensing layer generation local damage now is described, and very large bending deformation and surrender occur in the power consumption steel core.
Power consumption steel core bending deformation hour in supporting, the resistance change rate of carbon fiber sensing layer has reflected 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 by the strain of Intelligent carbon fiber sensing layer the bending deformation of power consumption steel core, the flexing duty of reflection power consumption steel core; When in supporting, power consumption steel core bending deformation is large, the steel core bursting of being consumed energy of local carbon fiber sensing layer is deactivated, and measures the acquisition Resistance Maximum, illustrates that there is local damage in the Intelligent carbon fiber sensing layer, and the steel core that now consumes energy has entered the maximal work state.Power consumption steel core duty can reflect service condition and the integrality supported.
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.In the present embodiment not clear and definite each ingredient all available prior art realized.
Claims (2)
1. the non-maintaining buckling restrained brace of carbon fiber resistance sensing layer intellectual monitoring, it is characterized in that: comprise the power consumption steel core, the GFRP confinement section, the waveform joint, contoured foam, sensing layer electrode and Intelligent carbon fiber sensing layer, the two ends of described GFRP confinement section are provided with the waveform joint, the inside center of GFRP confinement section and waveform joint is provided with the power consumption steel core, the GFRP confinement section is arranged symmetrically with along the power consumption steel core, described Intelligent carbon fiber sensing layer is positioned at the GFRP confinement section, the Intelligent carbon fiber sensing layer is set in parallel in the both sides, long limit of power consumption steel core, leave gap between Intelligent carbon fiber sensing layer and power consumption steel core, the Intelligent carbon fiber sensing layer is connected with the sensing layer electrode, 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, it is characterized in that: described power consumption steel core end is welded with two stiffening ribs, forms junction plate, and the above is provided with the bolt hole be connected with the structure node plate.
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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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| CN103422587B CN103422587B (en) | 2015-06-03 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN107207018A (en) * | 2015-02-04 | 2017-09-26 | 川崎重工业株式会社 | The state monitoring apparatus of the leaf spring of railcar bogie |
Family Cites Families (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 |
| CN102797185B (en) * | 2012-07-10 | 2014-12-10 | 东南大学 | Intelligent FRP (Fiber Reinforced Polymer) composite rib based on carbon fiber distribution type sensing and large-scale production process thereof |
| CN103216023B (en) * | 2013-04-19 | 2016-02-10 | 清华大学 | FRP section bar buckling-resistant support 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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2013
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107207018A (en) * | 2015-02-04 | 2017-09-26 | 川崎重工业株式会社 | The state monitoring apparatus of the leaf spring of railcar bogie |
| CN107207018B (en) * | 2015-02-04 | 2020-05-01 | 川崎重工业株式会社 | State monitoring device for leaf spring of railway vehicle bogie |
| 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 |
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| CN103422587B (en) | 2015-06-03 |
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