CN100498274C - Method for testing folding service life of aluminium-plastic composite board under cyclic strain - Google Patents
Method for testing folding service life of aluminium-plastic composite board under cyclic strain Download PDFInfo
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- CN100498274C CN100498274C CNB2006101654408A CN200610165440A CN100498274C CN 100498274 C CN100498274 C CN 100498274C CN B2006101654408 A CNB2006101654408 A CN B2006101654408A CN 200610165440 A CN200610165440 A CN 200610165440A CN 100498274 C CN100498274 C CN 100498274C
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Abstract
The plastic aluminum clad plate cycle strain edge folding serving duration measurement starts from acquiring the relative deflection parameter of the plastic aluminum clad plate in the application environment, clipping the sample to the inspection equipment and applying loading to it till it reach the relative deflection parameter, pressing the sample repeatedly using the previous strain, intermittently measuring the edge folding cracking length till the preset value, recording the pressure application count T, getting the edge folding serving duration A. It is reasonable, easy, with greatly reduced testing cost, with reliable testing result.
Description
Technical field:
The present invention relates to the detection of aluminium-plastic panel curtain wall system, be specifically related to a kind of method that the aluminium-plastic panel curtain wall system is installed the back folding service life of measuring.
Prior art:
The detection of metal curtain wall system is only limited to blast deformation performance, impermeability and waterproof test (closed curtain wall).The blast deformation test can only reflect the deformation failure form of material under quiet wind load, and this only is fit to nonmetallic materials curtain walls such as glass curtain wall, stone curtain wall.And for metal curtain wall (for example: aluminium-plastic panel curtain wall, aluminum veneer curtain wall etc.), after the key of destruction is the material bending, the destruction of the position, corner of curtain wall under the tired vibration of moving wind load, the anti-deformation extent of flanging directly concerns its service life.How detecting this performance of metal curtain wall material and system thereof, is the key problem in technology to metal curtain wall evaluation in serviceable life.
Concerning the composited aluminum and plastic decking that is used for curtain wall, an important long-term behaviour index is exactly a fatigue stress, because will bear the period effects of positive and negative blast at architectural aluminium-plastic panel, therefore must prove the reliability of the fatigue resistance of aluminum deck, thereby extrapolate the service life of composited aluminum and plastic decking flanging.About composited aluminum and plastic decking flanging intensity, domestic whole industry is not also carried out test in this respect at present, the external universal fatigue testing machine that adopts is tested, and this method shakes test specimen by load bar, measures the maximum strain of sample by the amount of deflection of control test specimen.Yet this test form and practical application have deviation, and equipment is also very expensive, can only use as research, and method of testing is difficult to promote the use of.
Summary of the invention:
Fundamental purpose of the present invention is to provide a kind of assay method of practical and effective folding service life of aluminium-plastic composite board under cyclic strain.
The assay method of folding service life of aluminium-plastic composite board under cyclic strain provided by the invention may further comprise the steps:
Step 1, obtain composited aluminum and plastic decking to be measured (sample) relative deflection value parameter under environment for use;
Step 2, sample is installed on checkout equipment,, reaches above-mentioned relative deflection value parameter until sample to the sample imposed load;
Step 4, the record number of times T that exerts pressure;
Wherein, D
MaxBe the maximal value of fresh gale fate in the curtain wall engineering location among the GB50178-1993 " Standard for climatic regionalization for building and civil engineering " a year, δ is correction factor (being generally 2).
In the said method, the relative deflection value parameter of step 1 is tested acquisition by the Wind-Pressure Resistance of GB/T 15227-1994 " building curtain wall blast deformation performance detection method ", or derives from the designing requirement of building curtain wall; The maximum cracking length of flanging is set according to " aluminium-plastic compound plate curtain engineering construction and control of acceptance "; Be specially: cyclic strain is ± 40mm, and frequency is set at 50mm during for 0.5Hz.
In the said method, the checkout equipment that uses, form by support fixation elements, Pneumatic component and operation control assembly, wherein, support fixation elements comprises the frame of a vertical fixedly aluminium-plastic panel and the clamping element that is installed, Pneumatic component also is installed on the horizontal platform of this fixed mount horizontal direction, and the work package of Pneumatic component is vertical with fixing aluminium-plastic panel, and described operation control assembly is electrically connected with Pneumatic component.
Wherein, described frame has two columns, a base, operation Heng Tai and Duo Gen brace, column firmly is connected with base, operate the centre position of fixedly connected two columns of horizontal platform, many braces are connected between column and the base, between column and the horizontal platform of operation and operate between horizontal platform and the base; Angle sign indicating number bolt is divided into two column sides; Described Pneumatic component is a pneumatic actuator system, include a pneumatic supply, and connect the air pump that pneumatic supply has a working beam, in the associated line of pneumatic supply and air pump, also be connected with a pneumatic duplex part water-separating gas filter and a magnetic switch, operate on the horizontal platform and establish slide rail, described air pump places energy move left and right on this slide rail; Described operation control assembly is made up of counter and controller, and controller links to each other with Pneumatic component, and counter is connected with the work package of Pneumatic component, writing task spare shuttling movement number of times.
Wherein, be equipped with in addition a chuck backing plate in the checkout equipment of use, the chuck backing plate is connected on the plate face of aluminium-plastic panel with bolt, and the working beam of this chuck backing plate and air pump vertical over against.
The present invention adopts said method to have following advantage:
1, the inventive method science, reasonable can be simulated the destruction and the process of aluminium-plastic panel curtain wall unit under the positive and negative blast;
2, the present invention is simple, and equipment is simple, can save a large amount of experimentation costs, is easy to promote the use of;
3, utilize the inventive method can obtain the service life of composited aluminum and plastic decking cyclic strain lower hem, can provide authentic data for the designer.
Description of drawings:
Fig. 1 is used assay device structures figure among the present invention.
Fig. 2 is used for different trade mark aluminiums composited aluminum and plastic decking bight intensity detection figure as a result for the inventive method.
Embodiment:
The present invention studies the assay method of folding service life of aluminium-plastic composite board under cyclic strain.This method is by using the flanging checkout equipment, effect by the simulation wind load, aluminium-plastic panel is fixed on the aluminum alloy frame keel, make its circulation inwardly produce (under the positive blast effect) and the outwards bending of (under the negative blast effect), detect the number of bends when taking place to destroy at last, again by calculating the serviceable life of tested composited aluminum and plastic decking.
This method may further comprise the steps:
One, obtains composited aluminum and plastic decking to be measured (sample) relative deflection value parameter under environment for use;
Two, sample is fixed on the checkout equipment,, reaches above-mentioned relative deflection value parameter until sample to the sample imposed load;
Three, the strain value of determining with step 1 is exerted pressure to sample repeatedly, intermittently measures flanging cracking length, until reaching the setting degree;
Four, write down the number of times T that exerts pressure;
Five, utilize the number of times of exerting pressure that obtains, the folding service life A that load capacity is calculated sample, unit: day:
Wherein, D
MaxBe the maximal value of fresh gale fate in the curtain wall engineering location among the GB 50178-1993 " Standard for climatic regionalization for building and civil engineering " a year, δ is correction factor (being generally 2).
Among the present invention, the relative deflection value parameter of step 1, generally be meant under the even load condition, under maximum wind pressure (as 12 grades of typhoons), the distortion size amplitude that sample can bear, as 30mm, the Wind-Pressure Resistance test that this parameter can be passed through GB/T15227-1994 " building curtain wall blast deformation performance detection method " obtains, or derives from the designing requirement of building curtain wall.
Among the present invention, the maximum of flanging cracking length is set according to " aluminium-plastic compound plate curtain engineering construction and control of acceptance "; Be ± 40mm that frequency is set at 50mm during for 0.5Hz as, cyclic strain.
Among the present invention, the checkout equipment of use, referring to shown in Figure 1, this equipment by support fixation elements 1, Pneumatic component 2, and operation control assembly 3 parts form.
Wherein, support fixation elements 1 comprises the frame and the clamping element 12 that is installed, and two columns 13 of frame, clamping element 12 is fixed in test specimen 8 on two columns 13 by being installed:
Pneumatic component 2 is the execution unit of equipment, it is a pneumatic actuator system, include a pneumatic duplex part water-separating gas filter 20, an air pump 21, a magnetic switch 22, a pneumatic supply 23 and a pipeline, pneumatic duplex part water-separating gas filter 20 is between pneumatic supply 23 and air pump 21, because contain steam in the air, pneumatic duplex part water-separating gas filter 20 parts play a role in filtering; Air pump 21 front ends connect a working beam 24, working beam 24 is over against the test specimen 8 that is installed on the frame, and be equipped with a chuck backing plate 5 in addition, chuck backing plate 5 adopts the M6 bolt to be connected on the plate face of test specimen 8, and the working beam 24 of this chuck backing plate 5 and air pump 21 vertical over against, during air driven pump work, working beam 24 interlock chuck backing plates 5 carry out shuttling movement, thereby drive the swing of test specimen 8; Air driven pump 21 is connected with pneumatic supply 23 by pipeline, establishes the work of magnetic switch 22 control air driven pumps 21 on the pipeline, adjusts the mutual alignment of magnetic switch 22, can change the running parameter of air pump 21, thus the wobble amplitude of related adjustment test specimen 8; Adjust the admission pressure and the exhaust velocity of pneumatic supply 23, can change the running parameter of air driven pump 21 equally, thereby change the stretching frequency of test specimen 8.
By above combination, form the testing apparatus of using among the present invention.This equipment and technology parameter: machine shape size: long 1580, wide by 1400, high 1795; Bleed pressure 0.4Mpa, stretching frequency f=1Hz; Amplitude of oscillation scope: Smax=± 50.
Below describe implementation process of the present invention in detail with specific embodiment.
Embodiment one: Engineering Projects
Beijing aluminium-plastic panel curtain wall engineering life-span is detected.Process steps is as follows:
1. obtain material parameter
According to designer's requirement,, determine the relative deflection value of panel under wind load action in conjunction with the functions of use of conditions such as the geographical environment at buildings place, weather, environment and buildings with reference to the performance of aluminium-plastic compound plate curtain; Perhaps determine relative deflection value (mm), thereby obtain the strain value that cyclic strain requires by Wind-Pressure Resistance test (GB/T 15227-1994).
The basic parameter of test specimen: 5005 magnalium aluminium sheet aluminium-plastic panels; Curtain wall height 60m; Maximum lattice 1250mm * 1500mm.Characteristi cvalue o fwindload (GBJ 9-97):
w
k＝β
zμ
sμ
zω
0
β in the formula
zThe wind pulse of-Z design place gets 2.25;
-height variation coefficient of wind pressure gets 1.35;
ω
0-wind velocity pressure is got 0.5kN/m
2
w
k＝2.25×1.35×1.5×0.5＝2.28kN/m
2
Drawing 1250mm * 1500mm aluminium-plastic panel center amount of deflection by aluminium-plastic panel resisting wind press capacity test (GB/T 15227-1994) is 32mm.
2. the installation and processing of sample
Provide and aluminium-plastic panel aluminium-plastic compound plate curtain same sample by producer,, utilize the angle sign indicating number to be fixed on the aluminium-plastic panel cyclic strain lower hem life test equipment sample cut, slot (require keeping the plastics sandwich layer that is not less than 0.3mm), flanging.
3. test
According to relative deflection value 32mm, determined that the equipment amplitude also is ± 32mm, the working beam frequency is to test for 1 time/second.The unit count device is started working, and when aluminium-plastic panel fluting arbitrary position, bending place aluminium sheet cracking reached 50mm (precision 0.1mm), vibration number was the failure test number of times T under the aluminium-plastic panel circulating pressure, and cycle index is 10200 times in this experiment.
4. determine serviceable life
Consult GB 50178-1993 " Standard for climatic regionalization for building and civil engineering " as can be known Beijing, curtain wall engineering location wind-force greater than 8 grades of (Beijing area wind velocity pressure 0.22kN/m during 8 grades of wind-force
2) fate is 64 days to the maximum every year, is maximal value D
Max, consider the influence that is lower than fresh gale power fate and other factors, multiply by correction factor δ (being generally 2), utilize the aluminium-plastic panel flanging life-span
It is 79.7 that formula calculates this curtain wall engineering folding service life.The aluminium-plastic panel curtain wall bight intensity that can estimate this project installation thus can reach 70 years serviceable life, surpasses the requirement of aluminium-plastic panel curtain wall design standards.
Embodiment two, to the test of the aluminium-plastic panel bight intensity of different trade mark alloys
Present embodiment illustrates that this inventive method can be used for analyzing the influence of the aluminium of the different trades mark to composited aluminum and plastic decking circulating pressure lower corner intensity.Three groups of composited aluminum and plastic deckings of producing by the aluminium of the different trades mark have been selected in the test for use.
Operation steps: basic identical with the step of embodiment one.The composited aluminum and plastic decking that the aluminium of three kinds of different trades mark is produced, thickness of slab is 4mm, according to code requirement fluting (the plastics sandwich layer that keeps 0.3mm), carries out flanging then respectively, utilizes the angle sign indicating number to be fixed on the aluminium-plastic panel cyclic strain lower hem life test equipment.The amplitude of set device is 40mm, and vibration frequency is 0.25Hz, 0.50Hz and 1.0Hz, equipment to the testing results (cycle index) of three kinds of times referring to shown in Figure 2.
Can see by Fig. 2, when vibration frequency is 0.25Hz, 0.50Hz and 1.0Hz, the composited aluminum and plastic decking bight intensity of 5005 aluminum alloy plate materials is better than the composited aluminum and plastic decking bight intensity of 3003 aluminum alloy plate materials, and the composited aluminum and plastic decking of 3003 aluminum alloy plate materials is better than the composited aluminum and plastic decking of 1100 fine aluminium sheet materials; Along with vibration frequency increases, different-alloy trade mark composited aluminum and plastic decking bight cycle index gap reduces.This is because the shearing strength and the fatigue strength of 1100 fine aluminiums, 3003 aluflexs, 5005 magnaliums improve successively.Take all factors into consideration other factors, therefore advantage such as for example aluminum alloy corrosion resistant is good is necessary for curtain wall with composited aluminum and plastic decking aluminium sheet alloy.
Embodiment three, cross-notching injure the composited aluminum and plastic decking flanging intensity detection of aluminium skin
The method identical with embodiment two selected same batch composited aluminum and plastic decking of same manufacturer production, wherein, sample 1 keeps the plastics sandwich layer of 0.3mm, sample 2 groove depths and aluminium according to the code requirement fluting, and not keeping the plastics sandwich layer, as seen naked eyes have reached aluminium lamination.Two samples experimentize with same operation.During this example detected, set device amplitude 40mm, working beam frequency 1 time/second recorded result 1200, the flanging life-span that calculates be 9 years (in the calculating, D
MaxWith reference to Beijing area numerical value, correction factor δ gets 2).
Can see that by this detection whether fluting processes standard, is the key factor that influences the cyclic strain lower hem life-span.It is dark to slot, and especially injures the fluting processing of face aluminium, can cause the toughness at composited aluminum and plastic decking flanging place to reduce, and the flanging life-span declines to a great extent, even not as good as original 30%.
Claims (4)
1, a kind of assay method of folding service life of aluminium-plastic composite board under cyclic strain may further comprise the steps:
Step 1, obtain composited aluminum and plastic decking sample to be measured relative deflection value parameter under environment for use; This relative deflection value parameter is tested acquisition by the Wind-Pressure Resistance of GB/T 15227-1994 " building curtain wall blast deformation performance detection method ", or derives from the designing requirement of building curtain wall;
Step 2, sample is installed on checkout equipment,, reaches above-mentioned relative deflection value parameter until sample to the sample imposed load;
Step 3, the relative deflection value determined with step 1 are exerted pressure to sample repeatedly as the amplitude of working beam in the checkout equipment Pneumatic component, intermittently measure flanging cracking length, until reaching the maximum cracking length that the setting degree is a flanging;
Step 4, the record number of times T that exerts pressure;
The number of times of exerting pressure that step 5, utilization obtain calculates the folding service life A of sample, unit: year:
Wherein, D
MaxBe the maximal value of fresh gale fate in the curtain wall engineering location among the GB 50178-1993 " Standard for climatic regionalization for building and civil engineering " a year, δ is a correction factor;
The described checkout equipment of step 2, form by support fixation elements, Pneumatic component and operation control assembly, wherein, support fixation elements comprises the frame of a vertical fixedly composited aluminum and plastic decking and the clamping element that is installed, Pneumatic component also is installed on the horizontal platform of operation of this frame horizontal direction, and the working beam of Pneumatic component is vertical with the plate face of the composited aluminum and plastic decking of fixing, and described operation control assembly is electrically connected with Pneumatic component; Be individually fixed on two columns (13) of frame by two flangings of the clamping element that is installed (12), thereby sample is installed in checkout equipment composited aluminum and plastic decking sample (8).
According to the assay method of the described folding service life of aluminium-plastic composite board under cyclic strain of claim 1, it is characterized in that 2, the maximum of flanging cracking length at the amplitude of working beam is ± 40mm, the vibration frequency of working beam is set at 50mm during for 0.5Hz.
3, according to the assay method of the described folding service life of aluminium-plastic composite board under cyclic strain of claim 1, it is characterized in that, described frame has two columns, a base, operation Heng Tai and Duo Gen brace, column firmly is connected with base, operate the centre position of fixedly connected two columns of horizontal platform, many braces are connected between column and the base, between column and the horizontal platform of operation and operate between horizontal platform and the base; Angle sign indicating number bolt is divided into two column sides; Described Pneumatic component is a pneumatic actuator system, include a pneumatic supply, and connect the air pump that pneumatic supply has a working beam, in the associated line of pneumatic supply and air pump, also be connected with a pneumatic duplex part water-separating gas filter and a magnetic switch, operate on the horizontal platform and establish slide rail, described air pump places energy move left and right on this slide rail; Described operation control assembly is made up of counter and controller, and controller links to each other with Pneumatic component, and counter is connected with the working beam of Pneumatic component, the writing task bar shuttling movement number of times number of times T that promptly exerts pressure.
4, according to the assay method of the described folding service life of aluminium-plastic composite board under cyclic strain of claim 3, it is characterized in that, be equipped with a chuck backing plate in addition, the chuck backing plate is connected on the plate face of composited aluminum and plastic decking with bolt, and the working beam of this chuck backing plate and air pump vertical over against.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104729936A (en) * | 2015-04-13 | 2015-06-24 | 南通理工学院 | Multifunctional fatigue testing machine |
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| CN107543762A (en) * | 2017-07-10 | 2018-01-05 | 国网浙江省电力公司丽水供电公司 | A kind of fatigue experimental device and method for applying evenly load |
| CN111751229B (en) * | 2020-06-23 | 2023-11-10 | 武汉钢铁有限公司 | Method for testing and controlling constant-amplitude cyclic fatigue performance of metal sheet |
| CN112881153B (en) * | 2021-01-19 | 2022-04-05 | 同济大学 | System and method for testing filling state of rubber layer formed by sheet edge rolling |
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| 铝塑复合板（2）. 王祝堂.铝加工，第21卷第3期. 1998 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104729936A (en) * | 2015-04-13 | 2015-06-24 | 南通理工学院 | Multifunctional fatigue testing machine |
| CN104729936B (en) * | 2015-04-13 | 2017-11-10 | 南通理工学院 | A kind of Multifunctional fatigue testing machine |
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Effective date of registration: 20120920 Address after: 100024 Beijing, Guanzhuang, East Lane, No. 1, Patentee after: China Building Material Test & Certification Group Co., Ltd. Address before: 100024 No. 1 East Lane, Beijing, Guanzhuang Patentee before: China Building Material Scientific Research Inst. |