CN109991092A - Natural exposing experimental provision, the system and method for luffing load lower member - Google Patents
Natural exposing experimental provision, the system and method for luffing load lower member Download PDFInfo
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- CN109991092A CN109991092A CN201910202289.8A CN201910202289A CN109991092A CN 109991092 A CN109991092 A CN 109991092A CN 201910202289 A CN201910202289 A CN 201910202289A CN 109991092 A CN109991092 A CN 109991092A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
- G01N3/12—Pressure testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
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Abstract
The present invention relates to the natural exposing experimental provisions of luffing load lower member, system and method, the natural exposing experimental provision of luffing load lower member, test specimen including several strips, two ground beams disposed in parallel, water tank for loading and control device, several test specimens are placed on two ground beams, the distance between two ground beams and the length of test specimen are adapted, the bottom middle position of test specimen is equipped with digital display type strain gauge and displacement meter, the top of test specimen is equipped with water tank for loading, loading head disposed in parallel there are two being set between water tank for loading and test specimen, water tank for loading inside bottom is equipped with liquid level sensor, water tank is equipped with water inlet pipe and outlet pipe, it further include water storage device, controller, water supply pump, drain water pump, main water pipeline and primary flow pipe road.The natural exposing experimental provision of luffing load lower member of the invention can be realized a variety of environment and couple with luffing load the/natural exposing experiment of collective effect lower member, and versatility is good, applied widely.
Description
Technical field
The present invention relates to materials and structural mechanics experimental field, real more particularly to the natural exposing of luffing load lower member
Experiment device, system and method.
Background technique
Aerospace, land transportation, civil construction, ship, ocean engineering, water conservancy and hydropower, harbour, wind-power electricity generation, engineering
The Grand Equipments or civil infrastructure in the fields such as machinery, the outer load often born are the luffing loads with spatial variations at any time
Even random load.For the antifatigue/durability Design and safety evaluation of these Grand Equipments and civil infrastructure, mesh
Before based on experimental data be from greatly indoor material (small specimen) permanent width fatigue Acceleration study and quantity it is few
Luffing load Acceleration study.The obvious reality with above-mentioned Grand Equipments and civil infrastructure of these experiment conditions (environment and load)
Border service condition has biggish difference, and indoor Acceleration study data obtained is used to carry out equipment and structure design for foundation
And safety evaluation, it will leave security risk or take extremely conservative design method and increase cost and waste of resource.
In order to it is both economical, accurately obtain above-mentioned Grand Equipments and civil infrastructure in practical Service Environment and load
Lower antifatigue/the endurance quality of effect, optimal method be development a small amount of Grand Equipments and civil infrastructure model or
Natural exposing experiment of the important component under luffing load, and couple/make jointly with load with its Service Environment is largely simulated
Acceleration study under combines.However, carrying out the natural exposing experiment of luffing load flowering structure or component, it is faced with following master
Want difficult: 1) setting, application and accurate control of luffing load are difficult in long-term exposure experiment.For in natural exposing experiment
Long-term, continuous, the accurate application and control of luffing load, there is presently no good methods；2) luffing load flowering structure or structure
The natural exposing experimental provision and method of part have not been reported, and can be suitable for multi-environment, multispecimen luffing load flowering structure
Or the natural exposing experimental method and device of component are even more to have never heard of；3) it couples/is total to luffing load in natural exposing environment
The long-term continuous accurate test and acquisition of experimental data are difficult under same-action.Material or small in the natural exposing experiment reported at present
The static deformation of test specimen be tested by foil gauge etc., but using foil gauge test method due to its service life is too short,
The safeguards such as the influence of environment and electric power are difficult and are difficult to accomplish long-term follow-on test and acquisition；4) experimental site, experiment item
The long-term operation of part and device etc. is difficult.The period of natural exposing experiment generally requires decades even upper a century, long in this way
Period in maintain setting experiment condition (environment, stress etc.), ensure experimental provision function and stability, maintenance field experiment
Ground etc. is all abnormal difficult；5) under natural exposing environment, the stress and change of structure or component (test specimen) under luffing load
Shape test method is left to be desired.On the one hand, current test method can not adapt to caused by test specimen changes with local environment
The test of deformation and stress changing rule, both can not it is complete, in real time, the deformation that accurately captures test specimen and stress be with environment
The data of variation and variation, and it is difficult the deformation in the moment accurately measure test specimen of load drastic change.On the other hand, in the past
Natural exposing experimental provision can not simultaneously implement multiple or a collection of test specimen naturally sudden and violent under identical environment and load collective effect
Dew experiment, is unfavorable for for statistical analysis to its long-term mechanical property.
Summary of the invention
For the technical problems in the prior art, an object of the present invention provides the nature of luffing load lower member
Exposure experimental provision, can in long-term experiment accurate control load, be suitble to multi-environment lower experiment, convenient for the length of experimental data
Phase follow-on test, it is convenient for safeguarding convenient for acquisition data.
For the technical problems in the prior art, the second object of the present invention is to provide luffing load lower member from
So exposure experimental system, can further accurate control load, and multiple test specimens can be tested simultaneously, be suitble to polycyclic
It is tested under border, it is convenient for safeguarding convenient for acquisition data convenient for the long-term follow-on test of experimental data.
For the technical problems in the prior art, the third object of the present invention is to provide oneself of luffing load lower member
So exposure experimental method, can in long-term experiment accurate simulation, application and control variable amplitude loading, can it is complete, real-time,
The data that the deformation and stress for accurately capturing test specimen change with the variation of environment and load, and can be simultaneously to multiple examinations
Part implement identical environment and varying environment couple with variable amplitude loading/collective effect under natural exposing experiment.
In order to achieve the above object, the present invention adopts the following technical scheme:
The natural exposing experimental provision of luffing load lower member, test specimen including several strips, disposed in parallel two
Ground beam, water tank for loading and control device, several test specimens are placed on two ground beams, the distance between two ground beams and examination
The length of part is adapted, and the bottom middle position of test specimen is equipped with digital display type strain gauge and displacement meter, and the top of test specimen is equipped with load
Water tank is set between water tank for loading and test specimen there are two loading head disposed in parallel, and water tank for loading inside bottom is equipped with level sensing
Device, water tank for loading are equipped with water inlet pipe and outlet pipe, and water inlet pipe is equipped with inlet water solenoid valve, and outlet pipe is equipped with water outlet solenoid valve.
Further, loading head is cylindrical loading head, is contacted between loading head and test specimen for line.
Further, ground beam towards the side of test specimen be cylindrical surface.
Further, pond is additionally provided with below test specimen, pond connects water pump, and it is identical with seawater to be marked with salt content in pond
Salt water, water tank for loading, test specimen and pond top are equipped with the rain-baffling device for capableing of rain cover.
Further, loading head is solid circular steel column, and loading head is welded in water tank for loading bottom.
The natural exposing experimental system of luffing load lower member, the natural exposing including several luffing load lower members are real
Experiment device further includes water storage device, controller, water supply pump, draining water pump, main water pipeline and primary flow pipe road, Mei Gejia
The water inlet pipe for carrying water tank is all connected to main water pipeline, and the outlet pipe of each water tank for loading is all connected to primary flow pipe road, it is main into
Waterpipe and primary flow pipe road are connected to water storage device, and water supply pump is arranged on main water pipeline, and draining water pump setting exists
On primary flow pipe road, water supply pump, draining water pump, inlet water solenoid valve and water outlet solenoid valve are electrically connected with control device.
Further, the natural exposing experimental provision rectangular array arrangement of several luffing load lower members.
The natural exposing experimental method of luffing load lower member sets the luffing traffic spectra of multistage ladder first, takes point
The method of phase measuring test piece deformation and stress: at the initial stage of natural exposing experiment, according to the duration of each load ladder,
It is taken to ensure that in each load ladder-effect time that test is primary, continuously measures bimestrial method；After two months, according to temperature
With the changing rule of humidity, takes and respectively measure primary method in the minimum and highest temperature time point daily, measure the change of test specimen
Shape and stress condition record the physical parameters such as stress, strain, displacement, temperature, humidity and salinity at that time in measurement.
Further, the setting of luffing load is the load born according to practical equipment or structure, using artificial or detection system
Multiple small loads are equivalent to the damage caused by equipment or structure using equivalent damage principle by the payload data of system automatic collection
Wound measures an equal big load, forms the equivalent sequence being made of big load, then calculates this etc. using probability analysis method
The autocorrelation or power spectral density of load sequence are imitated, and examines its probability distribution, to obtain the probability of equivalent load sequence
Distribution function and auto-correlation function or power spectral density function, then be entered into and have the commercial soft of Random process function
Part or self-compiling program carry out numerical simulation, obtain probability distribution and autocorrelation or power spectral density is identical is able to reflect reality
The typical duty load of load characteristics is composed, will then according to the Minimal sample size of payload data, test piece deformation and the forces testing frequency
It is load amplitude that Load Simulation, which is composed according to the mean value of luffing load drafted ladder quantity demarcation interval, take each section, is generated more
The luffing traffic spectra of grade ladder, finally, using the method for practical structures and test specimen institute bearing load equivalent (such as moment equivalence),
Determine that test specimen bears the size and the frequency of loads at different levels.
Further, load application, monitoring and control method are will to be incorporated into the quasi- i.e. luffing traffic spectra of load applied of test specimen
Software is controlled, numerical signal, instruction water supply pump, draining water pump, inlet water solenoid valve, water outlet solenoid valve starting are issued by controller
To realize load, load is monitored by liquid level sensor and control signal is issued controller, then makes to supply by controller sending instruction
Water water pump, draining water pump, inlet water solenoid valve, water outlet solenoid valve work.
Generally speaking, the present invention has the advantage that
1) the natural exposing experimental provision and system of luffing load lower member of the invention can be realized a variety of environment and become
The experiment of width load coupling/collective effect lower member natural exposing, versatility is good, applied widely；
2) the natural exposing experimental provision and system of luffing load lower member of the invention, can be real to multiple test specimens simultaneously
Apply identical environment couple with load/collective effect under natural exposing experiment, also identical ring can be implemented to different test specimens simultaneously
Border is tested from the natural exposing under different traffic spectra coupling/collective effects, in order to in identical and different traffic spectras and nature
The long-term mechanical property of test specimen is analyzed under the reciprocation of exposed environments；
3) the natural exposing experimental provision and system of luffing load lower member of the invention has simple, reasonable configuration
And layout, main component and element have excellent rigidity, intensity, stability, reliability and durability, and have installation and dimension
The features such as shield is convenient, low in cost.
4) the natural exposing experimental provision and system of luffing load lower member of the invention, can solve in long-term experiment
The accurate control of luffing load is difficult and experiment condition, the problems such as equipment and the long term maintenance in place are difficult.
5) setting method of multi-ladder luffing load of the invention had actually been on active service according to equipment, structure or component
The traffic spectra born in journey gives determining after Rational Simplification, the probability statistics feature with load is identical, be easy to simulate and work out,
The advantages that during long-term experiment convenient for continuous measurement, accurate application and control.And luffing load of the invention can be anti-
Reflect aerospace, land transportation, civil construction, ship, ocean engineering, water conservancy and hydropower, harbour, wind-power electricity generation, engineering machinery etc.
The Grand Equipments in field or the actual bearer situation of civil infrastructure.
6) the natural exposing experimental method of luffing load lower member of the invention, having can be for test specimen with locating ring
Deformation and stress changing rule caused by border and load variation and the characteristics of flexibly change, in short term with combining for a long time
Measurement method not only improves deformation that is complete, real-time, long-term, continuous, accurately capturing test specimen and stress with environment and lotus
The variation of load and the data changed, and can be to avoid the processing workload of big data.
Detailed description of the invention
Fig. 1 is the structure of the subtropical zone terrestrial environment example of the natural exposing experimental provision of luffing load lower member of the present invention
Schematic diagram；
Fig. 2 be luffing load lower member of the present invention natural exposing experimental provision subtropical zone terrestrial environment example in addition
The structural schematic diagram of one angle；
Fig. 3 is the subtropical zone wave splash zone example environments of the natural exposing experimental provision of luffing load lower member of the present invention
Structural schematic diagram；
Fig. 4 is the subtropical zone wave splash zone example environments of the natural exposing experimental provision of luffing load lower member of the present invention
Another angle structural schematic diagram；
Fig. 5 is the structural schematic diagram of the natural exposing experimental system of luffing load lower member of the present invention；
Fig. 6 is the luffing ladder traffic spectra that the natural exposing of luffing of embodiment of the present invention load lower member is tested.
Wherein Fig. 1 includes into Fig. 5:
1- water tank for loading；2- loading head；3- test specimen；4- liquid level sensor；51- inlet water solenoid valve；52- water outlet solenoid valve；
61- water supply pump；62- drains water pump；7- water inlet pipe；8- outlet pipe；9- water tower；10- digital display type strain gauge；11- displacement meter；
12- ground beam；131- main water pipeline；132- primary flow pipe road；14- controller；The pond 15-；16- rain-baffling device；17- cable.
Specific embodiment
It is next below that the present invention will be further described in detail.
Embodiment 1,
As shown in Figure 1 to Figure 2, natural exposing experimental provision, the system and method for luffing load lower member include: subtropical zone
Environment set, natural exposing experimental provision, natural exposing experimental system, natural exposing experimental method.The subtropical environment
For subtropical zone terrestrial environment.
The natural exposing experimental provision of luffing load lower member includes the test specimen of several strips, two disposed in parallel
Ground beam, water tank for loading and control device, several test specimens are placed on two ground beams, the distance between two ground beams and test specimen
Length be adapted, the bottom middle position of test specimen is equipped with digital display type strain gauge and displacement meter, and the top of test specimen is equipped with load water
Case is set between water tank for loading and test specimen there are two loading head disposed in parallel, and water tank for loading inside bottom is equipped with liquid level sensor,
Water tank for loading is equipped with water inlet pipe and outlet pipe, and water inlet pipe is equipped with inlet water solenoid valve, and outlet pipe is equipped with water outlet solenoid valve.
Loading head is cylindrical loading head, is contacted between loading head and test specimen for line.
Ground beam towards the side of test specimen be cylindrical surface.
Loading head is solid circular steel column, and loading head and water tank for loading weld.
The natural exposing experimental system of luffing load lower member, the natural exposing including several luffing load lower members are real
Experiment device further includes water storage device (water tower), controller, water supply pump, drains water pump, main water pipeline and primary flow pipe road,
The water inlet pipe of each water tank for loading is all connected to main water pipeline, and the outlet pipe of each water tank for loading is all connected to primary flow pipe
Road, main water pipeline and primary flow pipe road are connected to water storage device, and water supply pump is arranged on main water pipeline, drain water pump
It is arranged on primary flow pipe road, water supply pump, draining water pump, inlet water solenoid valve and water outlet solenoid valve are electrically connected with control device.
The natural exposing experimental provision rectangular array of several luffing load lower members is arranged.
The natural exposing experimental method of luffing load lower member takes the method for measuring test piece deformation and stress stage by stage:
The luffing traffic spectra for setting multistage ladder first, at the initial stage of natural exposing experiment, according to the duration of each load ladder,
It is taken to ensure that in each load ladder-effect time that test is primary, continuously measures bimestrial method；After two months, according to temperature
With the changing rule of humidity, takes and respectively measure primary method in the minimum and highest temperature time point daily, measure the change of test specimen
Shape and stress condition record the physical parameters such as stress, strain, displacement, temperature, humidity and salinity at that time in measurement.
The setting of luffing load is the load born according to practical equipment or structure, is adopted automatically using artificial or detection system
It is equal to be equivalent to the amount of damage caused by equipment or structure using equivalent damage principle by the payload data of collection for multiple small loads
A big load, form the equivalent sequence that is made of big load, the equivalent load sequence then calculated using probability analysis method
The autocorrelation or power spectral density of column, and its probability distribution is examined, to obtain the probability-distribution function of equivalent load sequence
With auto-correlation function or power spectral density function, then it is entered into the business software for having Random process function or self-editing
Program carries out numerical simulation, obtains probability distribution and autocorrelation or power spectral density is identical is able to reflect actual loading feature
Typical duty load spectrum, then according to the Minimal sample size of payload data, test piece deformation and the forces testing frequency, by Load Simulation
Spectrum is load amplitude according to the mean value of luffing load drafted ladder quantity demarcation interval, take each section, is generated as shown in FIG. 6
The luffing traffic spectra of multistage ladder, finally, using the side of practical structures and test specimen institute bearing load equivalent (such as moment equivalence)
Method determines that test specimen bears the size and the frequency of loads at different levels.
Load applies, monitoring and control method, is that will to be incorporated into control to the quasi- load i.e. luffing traffic spectra applied of test specimen soft
Part issues numerical signal by controller, and instruction water supply pump, draining water pump, inlet water solenoid valve, water outlet solenoid valve starting are to realize
Load.Load is monitored by liquid level sensor and control signal is issued controller, then by controller issue instruction make water supply pump,
Drain water pump, inlet water solenoid valve, water outlet solenoid valve work.
The natural exposing experimental provision of luffing load lower member, including loading head 2, the load water for being loaded to test specimen 3
Case 1, ground beam 12.Every two test specimen 3 is arranged in parallel on ground beam 12, by loading head 2 by water tank for loading 1 and its contained liquid
Weight be applied to the power identical with gravity direction of test specimen 3.Liquid transmission and savings system are to provide with regulating pondage to adding
Carry water tank, including water inlet pipe 7 and outlet pipe 8, inlet water solenoid valve 51, water outlet solenoid valve 52, water supply pump 61, draining water pump 62,
Water tower 9, main water inlet tube 131 and primary flow pipe 132 respectively with the water inlet pipe 7 of water tank for loading 1 and outlet pipe 8 and 9 phase of water tower
Even.Test device includes liquid level sensor 4, displacement meter 11 and digital display type strain gauge 10, and liquid level sensor 4 is located at water tank for loading 1
The bottom of inner sidewall, for measuring water pressure, displacement meter 11 is located at the lower surface at 3 middle part of test specimen, for testing the amount of deflection of test specimen 3
(vertical displacement), digital display type strain gauge 10 is located at the lower surface (advancing side) at 3 middle part of test specimen, for measuring the tension of test specimen 3
The stress and deformation at position.Control device includes controller 14, controller 14 and inlet water solenoid valve 51, water outlet solenoid valve
52, water supply pump 61, draining water pump 62 are electrically connected.1 water inlet is respectively set in the water inlet pipe 7 and outlet pipe 8 of each water tank for loading 1
Solenoid valve 51 and water outlet solenoid valve 52, to control the water inlet and draining of water tank for loading 1, water pump is divided into water supply pump 61 and draining
Water pump 62 is connected with main water pipeline 131 and primary flow pipe road 132 respectively, for the water inlet and draining of each water tank for loading 1,
Controller 14 is located at indoor monitoring room, by cable 17 and liquid level sensor 4, inlet water solenoid valve 51, water outlet solenoid valve 52, supplies
Water water pump 61 and draining water pump 62 are connected, for controlling the water supply and draining of each water tank for loading 1, to guarantee each water tank for loading 1
Weight and variable amplitude loading spectrum it is consistent.
As shown in Figure 1, ground beam 12 has two or more quantity, the spacing and test specimen 3 between every two ground beams 12 across
Away from adaptable.Ground beam 12 be designed to top be semicircle, length any (being arranged according to experimental site size), be highly 20~
Ribbon armored concrete (RC) component of 30cm, 20~30cm of width, are arranged on smooth cement flooring, can steadily put
It sets subject to test specimen 3.Ground beam 12 not only plays the role of support, but also can prevent ponding from impregnating test specimen 3, and conveniently to the stress of test specimen 3
And deformation measures.The top of ground beam 12 is arranged in parallel in several groups test specimen 3, forms several loading devices, each load
There are two 3, two loading heads 2 of test specimen and a water tank for loading 1 for device, and the spacing of two test specimens 3 and the bottom plate of water tank for loading 1 are wide
The length of degree and loading head 2 is adapted.
The loading head 2 is solid circular steel column, and the width direction axially along test specimen 3 and water tank for loading 1 of loading head 2 is set
It sets, the length of loading head 2 is identical as the baseplate width of water tank for loading 1, and bottom forms line with test specimen upper surface and contacts, top weldering
It is connected to 1 plate outer surface of water tank for loading.Each 1 bottom of water tank for loading is welded with two parallel loading heads 2, two loading heads 2
Spacing it is equal with three branches of 3 span of test specimen, form the loading form of four-point bending.
Water tank for loading 1 shown in Fig. 1 is rectangular vessel, and the upper surface of every two test specimen 3 places a water tank for loading 1, volume
Size does not occur significantly to deform according to experiment load setting, bottom plate and side plate under fully loaded, and does not send out under high wind effect
Raw rollover.The top plate of water tank for loading 1 is arranged to facilitate the cover board of unlatching；Bottom plate and side plate are equipped with reinforcing rib, insole board
The spacing of intermediate two reinforcing ribs and two loading heads 2 of four-point bending apart from identical, and be connected with above-mentioned loading head 2；Side
It is provided with inlet and outlet on plate, is connected respectively with water inlet pipe 7 and outlet pipe 8.
Water tower 9 shown in Fig. 5 is rectangle thick-walled vessel made of weather resistant structural steel, and size is according to the height of each water tank for loading 1
The total Water etc. of required adjusting is set in degree (guarantee having certain pressure of supply water), experiment.Its top is provided with into water
Mouth and water outlet are connected with main water pipeline 131, primary flow pipe road 132, water supply pump 61, draining water pump 62, bottom plate and side plate
Equipped with reinforcing rib.Water tower 9 is placed on smooth cement court, does not occur significantly to deform during operation.
The main components of controller 14 include: central processing unit (CPU) to program, with touch screen and output module into
Row communication, digital output module are used to control inlet water solenoid valve 51, the opening and closing of water outlet solenoid valve 52, PLC analogue collection module
To acquire sensor signal, A.C. contactor is to control water supply pump 61, the draining switch of water pump 62, the protection member such as air switch
Device.
Exposure experimental method of the luffing load lower member under the natural environment of subtropical zone, comprising the following steps:
1) luffing load is set.Using artificial or detection system automatic collection payload data, using equivalent damage principle,
By probability statistical analysis, obtain its statistical property it is identical and be capable of the bridge structure of numerical simulation typical duty load spectrum, then will
Its luffing traffic spectra for being reduced to multistage ladder.Then, using practical structures and the equivalent method of 3 bearing loads of test specimen, really
Determine size and the frequency that test specimen 3 bears loads at different levels.
2) design of test specimen 3 and production.It is real according to the shape of actual bearer component, size, stress condition and natural exposing
The experiment condition for testing field according to certain contracting than design test specimen 3, and makes a collection of test specimen 3 according to relevant criterion/regulation.
3) setting of natural exposing environment.According to the practical Service Environment in subtropical zone locating for component, it is set as subtropical zone land
Ground environment.For subtropical zone terrestrial environment, it is only necessary to be arranged on outdoor experimental site to place test specimen 3 outside the room of subtropical zone
Armored concrete ground beam 12.
4) loading device is made.First according to the type and size of one group of two test specimen 3, using two described in stainless steel production
A loading head 2 and a water tank for loading 1, and according to two loading positions of four-point bending test specimen 3, by two loading heads 2 with
The form of line contact is respectively welded in the loading position of 1 bottom surface of water tank for loading, loading head 2 and water tank for loading 1 is affixed, shape
Inlet and outlet are opened at one group of loading device, and in a side wall of water tank for loading 1, liquid level is installed in the lower section of water outlet
Sensor 4.Then, according to the group number of test specimen 3, the identical loading device of production several groups is repeated the above process.
5) water tower 9 is made.According to the setting such as total Water of required adjusting in the quantity of water tank for loading 1, height and experiment
The size of water tower 9, water tower 9 height indeformable according to its bottom plate of full load and side plate are higher than the original of 1 height of water tank for loading after installation
Then, water tower 9 is made using stainless steel plate.Reinforcing rib is set in its bottom plate and side plate, opens inlet and outlet in top plate, so as to
It is connected with water inlet pipe 7 and outlet pipe 8.
6) test specimen 3 is installed.First one group of two test specimen 3 is arranged in parallel on pre-set ground beam 12, two test specimens 3
Spacing according to water tank for loading 1 width be arranged, flushed with 3 lateral surface of test specimen with 1 lateral surface of water tank for loading or be slightly by the inside
Standard, so that test specimen 3 can be made to be exposed in natural environment and loading head 2 and water tank for loading 1 is allowed smoothly to be placed in the group two
Above a test specimen 3.Then, digital display type strain gauge 10 and installation displacement meter 11 are pasted in the span centre bottom of test specimen 3.For other groups
Test specimen repeats above-mentioned installation process.
7) storing and supplying water and Transmission system are installed.First water tower 9 is installed and is placed on the cement floor that topography is higher, smooth,
The PVC heavy wall main water pipeline of suitable dimension is chosen further according to the water supply of experimental system, displacement and water supply and sewage time requirement
131 and primary flow pipe road 132, by main water pipeline 131 and primary flow pipe road 132 respectively by the water outlet of water tower 9, water inlet
With the water inlet pipe 7 of each water tank for loading 1, outlet pipe 8, be connected.
8) control device is installed.By CPU, touch screen, output module, acquisition module, A.C. contactor etc. in control room
It is installed and is integrated, constitute a controller 14, and pass through cable 17 and air switch, pressure transmitter, water supply pump 61, row
Water water pump 62, inlet water solenoid valve 51, water outlet solenoid valve 52, liquid level sensor 4 are connected.It then will control, data acquisition and rear place
Reason software is input to the CPU in controller 14, and luffing traffic spectra is finally input to control program.
9) load measurement and control.The load applied to test specimen 3 is measured by liquid level sensor 4, and load is by load water
The water level height (hydraulic pressure) of case 1 controls.When the load of some ladder is adjusted to target load, by liquid level sensor
4 issue signals to controller 14, then by control system issue instruction to water supply pump 61, draining water pump 62, inlet water solenoid valve 51,
Water outlet solenoid valve 52 makes water supply pump 61, draining water pump 62 shut down, the closing of inlet water solenoid valve 51, water outlet solenoid valve 52.Mesh
Mark load is the stress condition according to component in practical structures object, using artificial or detection system automatic collection load number
According to using equivalent damage principle, multiple small loads are equivalent to an equal big lotus of the amount of damage caused by equipment or structure
It carries, forms the equivalent sequence being made of big load, the auto-correlation of the equivalent load sequence is then calculated using probability analysis method
Several or power spectral density, and its probability distribution is examined, to obtain the probability-distribution function and auto-correlation letter of equivalent load sequence
Several or power spectral density function, then it is entered into the business software for having Random process function or self-compiling program is counted
Value simulation, obtains probability distribution and autocorrelation or the identical typical duty load for being able to reflect actual loading feature of power spectral density
Spectrum composes Load Simulation according to change then according to the Minimal sample size of payload data, the deformation of test specimen 3 and the forces testing frequency
The mean value of width load drafted ladder quantity demarcation interval, take each section is load amplitude, generates the luffing load of multistage ladder
Spectrum, finally, determining that test specimen 3 is born using the method for practical structures and 3 bearing loads of test specimen equivalent (such as moment equivalence)
The traffic spectra of actual components, is converted to the traffic spectra of test specimen 3 by the size and the frequency of loads at different levels, then by the traffic spectra of test specimen 3
It is compiled into the luffing traffic spectra (target traffic spectra) of natural exposing experiment.
10) long-term test.Test specimen 3 couples with luffing load in natural exposing environment/collective effect under can deform, try
The deformation of part 3 can cause the variation of its stress in turn again.Therefore, for verify in natural exposing environment coupled with luffing load/
The changing rule of 3 long-term mechanical property of test specimen under collective effect guarantees the precision of test and reduces non-ambient and non-external force to the greatest extent
Influence.For concrete sample 3, on the one hand, the armored concrete conserved (RC) test specimen 3 is placed in interior one by the present invention
Nian Houcai implements natural exposing experiment, with the influence for reducing the contraction of concrete to the greatest extent and creeping to its long-term mechanical property.Separately
On the one hand, regardless of the test specimen 3 for which kind of material, the present invention takes measurement test specimen 3 change stage by stage according to the step number of traffic spectra
The method of shape and stress: each lotus is taken to ensure that according to the duration of each load ladder at the initial stage of natural exposing experiment
It carries and is tested in the ladder-effect time once, continuously measures bimestrial method；After two months, it is advised according to the variation of temperature and humidity
Rule is taken and respectively measures primary method in the minimum and highest temperature time point daily, measures the deformation and stress condition of test specimen 3.
In measurement, the physical parameters such as stress, strain, displacement, temperature, humidity and salinity at that time are recorded.Wherein the amount of deflection of test specimen 3 by
Displacement meter 11 positioned at 3 span centre bottom of test specimen is tested, and strain is surveyed by the digital display type strain gauge 10 for being pasted on 3 advancing side of test specimen
Examination, the stress of test specimen 3 are measured by liquid level sensor 4, and temperature, humidity and salinity are measured by temperature & relative humidity indicator and salinometer respectively.
Above-mentioned natural exposing experimental method and device can be used for bridge, tunnel, harbour, harbour, road, dam, venue, room
Armored concrete (RC) structural member of the buildings/works such as room, naval vessel, deep-sea platform, automobile, aircraft, is answered at steel construction piece
Condensation material, fibre reinforced composites (FRP) reinforce reinforced concrete structure part, FRP reinforces steel construction piece, steel-concrete combined structure part
And the natural exposing experiment for holding mount components of other materials composition.
Generally speaking, the present invention has the advantage that
The natural exposing experimental provision and system of luffing load lower member of the invention have the advantages that
1) the natural exposing experimental provision and system of luffing load lower member of the invention can be realized a variety of environment and become
The experiment of width load coupling/collective effect lower member natural exposing, versatility is good, applied widely；
2) the natural exposing experimental provision and system of luffing load lower member of the invention, can be simultaneously to multiple test specimens 3
Implement identical environment couple with load/collective effect under natural exposing experiment, also different test specimens 3 can be implemented simultaneously identical
Environment is tested from the natural exposing under different traffic spectra coupling/collective effects, in order to in identical and different traffic spectras and certainly
The long-term mechanical property of test specimen is analyzed under the reciprocation of right exposed environments coupling；
3) the natural exposing experimental provision and system of luffing load lower member of the invention has simple, reasonable configuration
And layout, main component and element have excellent rigidity, intensity, stability, reliability and durability, and have installation and dimension
The features such as shield is convenient, low in cost.
4) the natural exposing experimental provision and system of luffing load lower member of the invention, can solve in long-term experiment
The precise measurement of luffing load and control is difficult and experiment condition, the problems such as equipment and the long term maintenance in place are difficult.
The natural exposing experimental method of luffing load lower member of the invention, has the advantages that
1) setting method of the multi-ladder luffing load in experimental method of the present invention, is existed according to equipment, structure or component
The practical traffic spectra born in the process of being on active service determines that the statistical nature with load is identical, is easy to simulate after giving Rational Simplification
It is convenient for continuous measurement, accurate the advantages that applying and controlling with establishment, during long-term experiment.And luffing load of the invention
It is able to reflect aerospace, land transportation, civil construction, ship, ocean engineering, water conservancy and hydropower, harbour, wind-power electricity generation, engineering
The Grand Equipments in the fields such as machinery or the actual bearer situation of civil infrastructure.
2) the natural exposing experimental method of luffing load lower member of the invention, having can be for test specimen 3 with locating
Deformation and stress changing rule caused by environment and load variation and combined the characteristics of flexibly change, in short term with for a long time
Measurement method, not only improve deformation that is complete, real-time, long-term, continuous, accurately capturing test specimen 3 and stress with environment
Variation with load and the data changed, and can be to avoid the processing workload of big data.
Embodiment 2
The main device and method of the present embodiment are same as Example 1, are in place of main difference:
As shown in Figure 3, Figure 4, natural exposing environment described in the present embodiment is subtropical zone wave splash zone environment.Test specimen 3
Lower section be additionally provided with pond 15, pond 15 connects water pump, is marked with salt content salt water identical with seawater, water tank for loading in pond 15
1, the rain-baffling device 16 for capableing of rain cover is equipped with above test specimen 3 and pond 15.Pond 15 is that length is any (according to experimental site
Size setting), the rectangle reinforced concrete structure that the spacing between width and above-mentioned 2 ground beams 12 is equal, depth is 1500~2000mm,
Surface need to pass through antiseepage water process, and two long sides are constructed according to the requirement of above-mentioned ground beam 12, and configured with drainage arrangements such as water pumps.
The pond 15 is to configure artificial seawater according to the situation of change of Subtropical Coastal area seawater salinity, and in pond 15
Place loading device in top.The discharge of artificial seawater is completed by matched water pump.The rain-baffling device 16 (awning) is to use
Overhead pitched roof shape structure, the top in pond 15 is set up in using stainless steel frame made of the materials such as weather-proof, light transmission PVC,
The salinity of artificial seawater is reduced to prevent rainwater from flowing into pond 15.
Specific the present embodiment is that the exposure using the luffing load lower member in invention under the natural environment of subtropical zone is real
Method and device is tested, using carbon fibre reinforced composite (CFRP) reinforced steel concrete (RC) beam as test specimen 3, with " subtropical zone
Then wave splash zone environment " follows the steps below structure under luffing load as a kind of semi-tropical typical natural environment
The natural exposing of part is tested:
(1) design of test specimen 3 and production.According to related specifications, by the common strenthening member " CFRP of subtropical zone RC bridge
Reinforce RC simply supported beam " according to certain contracting ratio design test specimen 3.Wherein, RC beam is having a size of 1850mm long × 100mm wide × 200mm
Height, span 1600mm；Concrete is C30；Main reinforcement is Ф 10II grades of reinforcing bar, and bearing rod and stirrup are 8I grades of reinforcing bars of Ф, is matched
Muscle rate is 0.981%；CFRP is that the 1560mm long × 100mm wide × 0.23mm worked out using T700-12k carbon fiber wire calculates thickness
The CFRP prepreg of degree, such as carbon fiber sheet (CFL)；Using the strong epoxy resin A of superelevation, CFL is symmetrically pasted on RC by B glue
Beam bottom portion.
About the production of test specimen 3, steel reinforcement cage is first rolled, pastes foil gauge in the lower edge of main reinforcement, then casting concrete, puts
It demoulds, conserve 28 days after setting 1 day, place 1 year indoors thereafter, then sticking carbon fiber thin plate.
(2) main device design and checking computations.
1) water tank for loading 1 designs: it is for statistical analysis for the ease of long-term mechanical property to test specimen 3 etc., it determines each
Load of the water tank for loading 1 (containing liquid) as 2 test specimens 3；According to the dead load size of sample dimensions and actual components, determine certainly
It is so four-point bending to the loading form of test specimen 3 in exposure experiment, then according to moment equivalence principle, tentative calculation water tank for loading 1
After stress and deformation, by being dimensioned to for water tank for loading 1: 2000mm long × 800mm wide × 1200mm high；Finally by water tank for loading
It the material and shape of 1 each building block and is sized to:
Frame: in order to ensure the strength and stiffness of water tank for loading 1, tower structure is formed using square steel tube.Frame size
It is respectively as follows: long l=2000mm, wide w=800mm, high h=1200mm.The material of square steel tube is 201 stainless steels, sectional dimension
For 30 × 30mm, with a thickness of 2mm.
Bottom plate: it is made of thick 201 stainless steel plates of the 2mm for being provided with ribs, having a size of 2000mm long × 800mm wide.
In bottom surface, interphase is symmetrically equipped with two ribs, middle position in the width direction away from l1=533.3mm along its length
Equipped with 1 ribs, material and sectional dimension are identical as above-mentioned square steel tube, to enhance rigidity and the carrying of bottom plate.
Side plate: it is made of thick 201 stainless steel plates of the 2mm for being provided with ribs, two pieces of sides of 1 length direction of water tank for loading
Board size is 2000mm long × 1200mm high, the ribs equipped with two along short transverse；Two pieces of 1 width direction of water tank for loading
Ribs of the side plate having a size of 800mm wide × 1200mm high, equipped with 1 in the width direction.Ribs uses above-mentioned stainless steel square
Steel pipe, material and sectional dimension are identical as above-mentioned square steel tube.
Cover board: it is made of thick 201 stainless steel plates of the 2mm for being provided with ribs, having a size of 2000mm long × 800mm wide.
1 length direction of water tank for loading is provided with 1 ribs, width direction spaced set has 2 ribs, the material of ribs
And size is identical as above-mentioned stainless steel square steel pipe.
2) water tower 9 designs: water tower 9 is to be formed to the water supply of entire experimental system and water storage, and to each water tank for loading 1
Certain hydraulic pressure.For the present embodiment, above-mentioned water tank for loading 1 is equipped with 15 altogether, according to luffing (ladder) traffic spectra and considers bridge
The dead load of girder construction, the maximum amount of water that whole system needs to adjust are 11.52m3.For this purpose, by the size design of water tower 9 are as follows:
3660mm long × 1500mm wide × 2150mm high, the material and shape of building block and is sized to:
Frame: in order to ensure the strength and stiffness of water tower 9, tower structure is formed using square steel tube.Frame size difference
Are as follows: long l=3660mm, wide w=1500mm, high h=2150mm.The material of square steel tube is 201 stainless steels, sectional dimension 30
× 30mm, with a thickness of 2mm.
Bottom plate: it is made of thick 201 stainless steel plates of the 2mm for being provided with ribs, having a size of 3660mm long × 1500mm wide.
Bottom surface along its length equally spacedly be equipped with 3 ribs, in the width direction equally spacedly be arranged 2 ribs, material
And sectional dimension is identical as above-mentioned square steel tube, to enhance the rigidity of bottom plate.
Side plate: it is made of thick 201 stainless steel plates of the 2mm for being provided with ribs, two pieces of side plate rulers of 9 length direction of water tower
Very little is 3660mm long × 2150mm high, and 2 ribs are equally spacedly equipped with along short transverse, are equally spacedly equipped with along its length
3 ribs；2 blocks of side plates of 9 width direction of water tower are equipped with 1 in the width direction and add having a size of 1500mm wide × 2150mm high
Strong rib is equally spacedly equipped with 2 ribs along short transverse.All ribs are all made of above-mentioned stainless steel square steel pipe, material
And sectional dimension is identical as above-mentioned square steel tube.
Cover board: it is made of thick 201 stainless steel plates of the 2mm for being provided with ribs, having a size of 3660mm long × 1500mm wide.
It is provided with 2 ribs along 9 equal spacing in length direction of water tower, is provided with 1 ribs, the material of ribs in the width direction
And size is identical as above-mentioned stainless steel square steel pipe.It is provided on cover board and inlet and outlet, with main water pipeline 131 and main
Outlet conduit 132 is connected.
3) it checks
Strength checking: the bottom plate of water tank for loading 1 and water tower 9, side plate its maximum stress under the load of setting are respectively less than 201
The yield strength (275MPa) of stainless steel, meets design requirement.
Rigidity/deformation analysis: the bottom plate of water tank for loading 1 and water tower 9, side plate are in the setting load (appearance of each water tank for loading 1
Product is 1.92m3, water tower 9 volume be about 11.8m3/ maximum load) under maximum distortion be respectively less than 1mm, meet design requirement.
Stability Checking: water tank for loading 1 needs to check at high wind (12 grades of typhoons) due to being set up on 2 test specimens 3
Whether can topple under effect.Checking computation results show when 1 capacity of water tank for loading is 60% or more, under high wind effect
It will not topple, stability is good.
4) other main components/component design and checking computations.
Loading head 2: material SUS304, size are as follows: diameter of phi 1=30mm, length L=800mm.
Ground beam 12: material is armored concrete, concrete grade C30.12 top radius of ground beam is R=300mm, height
For 300mm, width 300mm, there are two types of (10m and 5m) for length, and being provided on 15 side of pond is 5m, remaining is
10m。
Pond 15: main-body structure is armored concrete, concrete grade C30, and does and anti-blend preservative treatment.Pond 15
Size are as follows: 5000mm long × 1300mm wide × 1500mm is deep, and when experiment remains the artificial seawater that 1200mm is deep, salinity is 3%.
Rain-baffling device 16 (awning): 16 size of awning are as follows: length × width × height=5200 × 2400 × 1600mm, wherein branch
Frame material is SUS304, the square steel that sectional dimension is 50 × 50mm, wall thickness is 3mm；Material for ceiling is transparent PVC, with a thickness of
5mm。
Checking computation results: the intensity of each component/component is enough, deforms all in elastic range, meets design requirement.
(3) natural exposing field experiment is built.Irised out in Guangzhou South China Science & Engineering University campus one piece of 18000mm long ×
The level land of 12000mm wide, builds field experiment according to the following steps:
1) levelling after-pouring concrete, with a thickness of 200mm；
2) ground beam 12 that length is 10000mm and 5000mm long is poured respectively along its length according to the interval of 1600mm；
3) pond 15 is built between the ground beam 12 of 2 5000mm long；
4) rain-baffling device 16 (awning) is built in the top in pond 15；
5) fence is built in the periphery of experimental site.
(4) the subtropical zone wave splash zone natural environment exposure experiment of luffing load lower member.It follows the steps below to implement:
1) setting of luffing load.Using artificial or detection system automatic collection payload data, using equivalent damage original
Reason, by statistical analysis, obtain its statistical property it is identical and be capable of the RC bridge structure of numerical simulation typical duty load spectrum, then
It is reduced to the luffing traffic spectra of multistage ladder.Then, using practical structures and the equivalent method of 3 bearing loads of test specimen,
Determine that test specimen 3 bears the size and the frequency of loads at different levels.In the present embodiment, the dead load of RC bridge member accounts for full payload
60%, vehicular load accounts for 40%, and the Maximum constraint of total load head is the cracking load lower than concrete.Luffing (vehicle) load
Spectrum is ladder traffic spectra, and as shown in Fig. 6,7 days are 1 period, and each period is equipped with 28 ladders, when the effect of each ladder
Between depending on effect frequency ratio according to each load amplitude in former traffic spectra.
2) water tank for loading 1, loading head 2, water tower 9, test specimen 3, controller 14 and other devices are made；Purchase water pump, electricity
Magnet valve, pipeline, liquid level sensor 4, digital display type strain gauge 10, displacement meter 11 etc.；
3) loading device is built according to construction shown in attached drawing 1.First two loading heads 2 are welded according to four-point bending loading position
It is connected to the bottom plate of water tank for loading 1, is then placed in two test specimens 3 on the ground beam 12 on 15 side of pond, and be located at pond 15
Surface, then will be placed in above two test specimens 3 with 1 water tank for loading 1 of loading head 2 makes the upper of loading head 2 and test specimen 3
Surface forms line contact, constitutes one group of loading device.Thereafter, other each group loading devices are built according to the method described above；
4) rain-baffling device 16 (awning) is built above pond 15 and loading device, as shown in Fig. 3.Rain-baffling device 16
The quantity of (awning) is identical as pond 15, and matches with the quantity of loading device；
5) according to installation storing and supplying water and Transmission system, test device, control device shown in attached drawing 5.In storing and supplying water and transmission
In system, pipeline is weather-proof PVC thick-walled tube, is divided into two types: first is that main water pipeline 131 and primary flow pipe road 132, ruler
Very little is Φ 64mm；Second is that the water inlet pipe 7 and outlet pipe 8 that are connect with water tank for loading 1, having a size of Φ 32mm；Water pump be duct type from
Heart pump is divided into water supply pump 61 and draining water pump 62；The solenoid valve of control device is two mouthfuls of two direct acting type solenoid valves of normally closed type,
It is respectively arranged on the water inlet pipe 7 and outlet pipe 8 of each water tank for loading 1；The liquid level sensor 4 of test device is universal pressure
Sensor, is placed in the lower part of 1 inner sidewall of water tank for loading, measurement accuracy 0.1%, and system can control the deviation of liquid level to be less than
1mm。
6) production salinity is 3% or 2% or 1% artificial seawater, and injects in pond 15, then starts experimental system and opens
Begin to implement natural exposing experiment.
(5) the long-term stress and deformation test of test specimen 3.Measurement test specimen 3 change stage by stage is taken according to the step number of traffic spectra
The method of shape and stress: it is taken at the initial stage of natural exposing experiment according to the duration (see attached drawing 6) of each load ladder
The method for ensuring in each load ladder-effect time test 1 time, continuously measuring 2 months；After 2 months, according to temperature and humidity
Changing rule, take the method for respectively measuring 1 time in the minimum and highest temperature time point daily, measure the deformation and stress of test specimen
Situation.In measurement, the physical parameters such as stress, strain, displacement, temperature, humidity and salinity at that time are recorded.Wherein, test specimen 3
Amount of deflection is tested by the displacement meter 11 for being located at 3 span centre bottom of test specimen；Strain the digital display type strain gauge by being pasted on 3 advancing side of test specimen
10 (the intelligent strain gauge of external labeling type monochord, measurement accuracy are 2 μ ε) tests；The stress of test specimen 3 is measured by liquid level sensor 4；Temperature
Degree, humidity and salinity are measured by temperature & relative humidity indicator and salinometer respectively.
(6) concentration of seawater controls.Artificial seawater in pond 15 is according to the Zhujiang River several main estuary (Humen, Ya Men, mills
Knife door) surrounding waters 4 seasons salinity altercation situation (measured data) setting are as follows: 2%, 1%, 2%, 3%, and according to every
The method that week adjusts 1 time is controlled, i.e., the salt water in pond 15 supplements weekly once, and measures its salinity, when salinity deviates
It when setting value, is adjusted by adjusting salt amount or water, until it reaches setting value.
The above embodiment is a preferred embodiment of the present invention, but embodiments of the present invention are not by above-described embodiment
Limitation, other any changes, modifications, substitutions, combinations, simplifications made without departing from the spirit and principles of the present invention,
It should be equivalent substitute mode, be included within the scope of the present invention.
Claims (10)
1. the natural exposing experimental provision of luffing load lower member, it is characterised in that: test specimen including several strips, parallel
Two ground beams, water tank for loading and the control device being arranged, several test specimens are placed on two ground beams, between two ground beams
Distance and the length of test specimen are adapted, and the bottom middle position of test specimen is equipped with digital display type strain gauge and displacement meter, the top of test specimen
It is set equipped with water tank for loading, between water tank for loading and test specimen there are two loading head disposed in parallel, water tank for loading inside bottom is equipped with
Liquid level sensor, water tank for loading are equipped with water inlet pipe and outlet pipe, and water inlet pipe is equipped with inlet water solenoid valve, and outlet pipe is equipped with water outlet
Solenoid valve.
2. the natural exposing experimental provision of luffing load lower member described in accordance with the claim 1, it is characterised in that: loading head is
Cylindrical loading head, contacts between loading head and test specimen for line.
3. the natural exposing experimental provision of luffing load lower member described in accordance with the claim 1, it is characterised in that: ground beam direction
The side of test specimen is cylindrical surface.
4. the natural exposing experimental provision of luffing load lower member described in accordance with the claim 1, it is characterised in that: under test specimen
Side is additionally provided with pond, and pond connects water pump, is marked with salt content salt water identical with seawater, water tank for loading, test specimen and water in pond
The rain-baffling device for capableing of rain cover is equipped with above pond.
5. the natural exposing experimental provision of luffing load lower member described in accordance with the claim 1, it is characterised in that: loading head is
Solid circular steel column, loading head are welded in water tank for loading bottom surface.
6. the natural exposing experimental system of luffing load lower member, it is characterised in that: including appointing in several claims 1 to 5
Meaning one described in luffing load lower member natural exposing experimental provision, further include water storage device, controller, water supply pump,
Draining water pump, main water pipeline and primary flow pipe road, the water inlet pipe of each water tank for loading are all connected to main water pipeline, Mei Gejia
The outlet pipe for carrying water tank is all connected to primary flow pipe road, and main water pipeline and primary flow pipe road are connected to water storage device, supplies water
Water pump is arranged on main water pipeline, and draining water pump is arranged on primary flow pipe road, water supply pump, draining water pump, water inlet electromagnetism
Valve and water outlet solenoid valve are electrically connected with control device.
7. the natural exposing experimental system of luffing load lower member according to claim 6, it is characterised in that: several changes
The natural exposing experimental provision rectangular array of width load lower member is arranged.
8. the natural exposing experimental method of luffing load lower member, it is characterised in that: set the luffing load of multistage ladder first
Spectrum takes the method for measuring test piece deformation and stress stage by stage: at the initial stage of natural exposing experiment, according to each load ladder
Duration is taken to ensure that in each load ladder-effect time that test is primary, continuously measures bimestrial method；Two months
Afterwards, it according to the changing rule of temperature and humidity, takes and respectively measures primary method in the minimum and highest temperature time point daily, survey
The deformation and stress condition for measuring test specimen record the objects such as stress, strain, displacement, temperature, humidity and salinity at that time in measurement
Manage parameter.
9. the natural exposing experimental method of luffing load lower member according to claim 8, it is characterised in that: luffing load
Setting be that the load born according to practical equipment or structure is answered using artificial or detection system automatic collection payload data
The typical duty load for being able to reflect actual loading feature and energy numerical simulation is obtained by statistical analysis with equivalent damage principle
Spectrum, then it is reduced to the luffing traffic spectra of multistage ladder, then, using practical structures and the equivalent side of test specimen institute bearing load
Method determines that test specimen bears the size and the frequency of loads at different levels.
10. the natural exposing experimental method of luffing load lower member according to claim 9, it is characterised in that: load is applied
Add, monitor and control method, is to be issued control software is incorporated into the quasi- load i.e. luffing traffic spectra applied of test specimen by controller
Numerical signal, instruction water supply pump, draining water pump, inlet water solenoid valve, water outlet solenoid valve work are to realize load, and load is by liquid level
Control signal is simultaneously issued controller by sensor monitoring, then makes water supply pump, draining water pump, water inlet electricity by controller sending instruction
Magnet valve, water outlet solenoid valve work.
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| CN110501280A (en) * | 2019-08-30 | 2019-11-26 | 广东工业大学 | A kind of corrosion simulated device and method for prestressed stretch-draw anchorage |
| CN110487655A (en) * | 2019-09-12 | 2019-11-22 | 中国石油大学(华东) | A kind of vertical cyclic load load testing machine of the frequency conversion of water loop control |
| CN111965037A (en) * | 2020-08-05 | 2020-11-20 | 重庆大学 | Composite foundation rigidity loading test system and loading test method for geotechnical centrifuge |
| CN113218793A (en) * | 2021-04-20 | 2021-08-06 | 华南理工大学 | Loading device and method of structural fatigue/durability experiment system in complex environment |
| CN113218793B (en) * | 2021-04-20 | 2022-09-20 | 华南理工大学 | Loading device and method of structural fatigue/durability experiment system in complex environment |
| CN115290467A (en) * | 2022-08-23 | 2022-11-04 | 广东工业大学 | Characterization method for long-term performance of fiber cloth-concrete interface based on accelerated experiment method |
| CN115290467B (en) * | 2022-08-23 | 2023-12-01 | 广东工业大学 | Method for representing long-term performance of fiber cloth-concrete interface based on acceleration experiment method |
| CN116198749A (en) * | 2023-05-06 | 2023-06-02 | 中国科学院空间应用工程与技术中心 | Space material exposure experiment control system and method |
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