CN104215653B - System for testing fire resistance of reinforced concrete plate under effect of boundary restriction by utilizing jack - Google Patents
System for testing fire resistance of reinforced concrete plate under effect of boundary restriction by utilizing jack Download PDFInfo
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- CN104215653B CN104215653B CN201410420317.0A CN201410420317A CN104215653B CN 104215653 B CN104215653 B CN 104215653B CN 201410420317 A CN201410420317 A CN 201410420317A CN 104215653 B CN104215653 B CN 104215653B
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 90
- 239000010959 steel Substances 0.000 claims abstract description 90
- 238000006073 displacement reaction Methods 0.000 claims abstract description 17
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- 239000011819 refractory material Substances 0.000 claims description 19
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Abstract
The invention discloses a system for testing fire resistance of a reinforced concrete plate under effect of boundary restriction by utilizing a jack. The system comprises a test furnace device (1), a boundary restriction device (2), a loading article (3) and a control and data acquisition device (4), wherein a steel ball (1.2) and a steel rolling shaft (1.3) are arranged between the top surface of a furnace body (1.1) and a reinforced concrete test floor slab (5); the boundary restriction device comprises a grooved support (2.1), a steel support (2.2), a steel strand (2.4), a jack (2.5) and a steel strand clamp (2.6); the control and data acquisition device comprises a central processor, a flame control loop, a temperature acquisition loop, a displacement acquisition loop, a strain acquisition loop and a jack control loop. According to the system for testing the fire resistance, the interaction between two adjacent components of the structure in the fire is approximately considered by a way of applying restriction to the boundary of the component, so that the influence law of different boundary restriction action on the fire resistance of the reinforced concrete plate can be researched conveniently.
Description
Technical field
The present invention relates to a kind of reinforced concrete floor Fire-resistance test system, specifically one kind enter row bound using jack
The reinforced concrete floor Fire-resistance test system of constraint, so as to obtain different boundary effect of contraction to reinforced concrete floor fire-resistance
The affecting laws of performance, belong to building structure and prevent and reduce natural disasters technical field.
Background technology
With China's rapid development of economy, people's living standard and quality are greatly improved, and recent year is high
Layer building is emerged in multitude, and building once catches fire, and the life and property of people will be brought about great losses.
What the fire resistance rating of building element was mainly measured according to the fire resistance test of standard, i.e., Elevated Temperature Conditions in regulation,
Pressure condition, loading environment, required by fiery condition etc. under, can detection wall, post, beam, the component such as floor meet stability, complete
Property, thermal insulation etc. require, study the fire resistance of existing structure and how building structure, component improved by appropriate design
Fire-resistance capacity be current building fire area research important topic.
Reinforced concrete floor is subjected to the vertical lotus of structure as one of significant levels component in building structure
Carry, also play a part of horizontal subdivision, when building occurs fire, its fire area is larger, comparatively serious by fire, so
Reinforced concrete floor fire resistance in a fire in research structure, carries out rational resisting fire design, has great importance.
Currently, the Fire-resistance test of most of armoured concrete slabs does not consider boundary constraint, and concrete slab can be in its plate face
In the range of free wxpansion deformation, and in a practical situation, Concrete At High Temperature floor is because its deformation is by the pact of adjacent floor deck
Beam can show and the visibly different characteristic of independent floor member.
When the fire-resistance behavior of research floor is with fire resistance, mutually constrain produced discounting for adjacent floor deck in structure
Impact of the power to result of study, it is possible to cause internal force of floor, deformation and the fire resisting pole for obtaining by test in some cases
Limit is larger with practical structures component difference, causes its boundary condition not to be inconsistent with practical structures component, it is impossible to react it completely whole
The fire-resistance behavior of body structure, therefore study armoured concrete slab fire resistance in a fire and failure mode tool under boundary constraint
There is important realistic meaning.
The content of the invention
For the problem that above-mentioned prior art is present, the present invention provides a kind of jack boundary constraint armoured concrete slab and resists
Fiery pilot system, is approximately considered by way of a minor structure being taken out from original structure or applies constraint to component border
Interaction in fire between structure adjacent members, is easy to study different boundary constraints effects to armoured concrete slab fire-resistance
The affecting laws of performance, and then the resisting fire design of reinforced concrete floor can be instructed according to test data, improve its apyrous
Energy.
To achieve these goals, this jack boundary constraint armoured concrete slab Fire-resistance test system is filled including trial furnace
Put, boundary constraint device, load and control and data acquisition unit.
Described test furnace apparatus include body of heater, drop-bottom, oil supply pipe, integral combustor, furnace temperature thermocouple and row
Cigarette channel；
Body of heater is protected using refractory material, including assembled furnace wall and connector, is connected by connector between assembled furnace wall,
Burner installing hole is provided with body of heater, steel ball and steel roller bearing are set between body of heater top surface and armored concrete test floor, used
Space between flexible refractory material filling steel ball and steel roller bearing；
Drop-bottom is fixedly connected on bottom of furnace body, and exhaust opening is provided with above；
Oil supply pipe is arranged circumferentially at outside body of heater, oil supply pipe and fuel tank and fuel delivery mechanism connection；
The spout of integral combustor is arranged towards furnace interior, and is arranged on confession through the burner installing hole on body of heater
Connect on oil-piping and with oil supply pipe, the junction of integral combustor and oil supply pipe install be connected with electron servo valve and
Igniter；
Furnace temperature thermocouple is arranged on inboard wall of furnace body top；
Discharge flue is connected with the exhaust opening of drop-bottom.
Described boundary constraint device includes grooved support, bracing members, steel strand wires, jack and steel stranded wire clamper；
Grooved is supported and is arranged on the edges of boards of armored concrete test floor relative position, is at least symmetrical arranged a pair, groove
Type supporting section is channel steel type mechanism, and the thickness that its width of rebate size tests floor with armored concrete coordinates, and steel
Reinforced concrete laboratory building board enters inside notch；
One or more perpendicular to armored concrete test floor bracing members along grooved bearing length direction symmetrically
It is arranged in each grooved to support on the back side, each bracing members supports the back side to be connected by connection member and grooved；
Symmetrically arranged bracing members are connected by steel strand wires, and rigid refractory material protective layer is provided with outside steel strand wires, and steel is twisted
Line one end connects jack, and the other end is clamped through after the top or bottom of the bracing members on both sides with steel stranded wire clamper, one group pair
Upper and lower two steel strand wires, two jack and two steel stranded wire clampers, and two jack and two are set on the bracing members of title
Diagonally arrange in steel stranded wire clamper cross-wise direction, be connected with many top flow dividers after each jack parallel connection, push up flow divider and pump more
Stand connection.
Described load is placed on armored concrete test floor.
Described control and data acquisition unit includes central processing unit, flame control loop, temperature acquisition loop, displacement
Electron servo valve on acquisition circuit, strain acquirement loop and jack control loop, central processing unit and integral combustor
And igniter electrical connection；Central processing unit is electrically connected with data collecting instrument, and data collecting instrument is electrically connected with furnace temperature thermocouple, data
Acquisition Instrument is electrically connected with the thermocouple of the measurement concrete and reinforcing bar temperature that are arranged on armored concrete laboratory building intralamellar part；Data
Acquisition Instrument is electrically connected with the displacement transducer of the inside and outside displacement in measurement floor level being arranged on armored concrete test floor level
Connect；Data collecting instrument is electrically connected with the foil gauge of the measurement reinforcing bar strain for being arranged on armored concrete laboratory building intralamellar part；Central authorities
Processor is electrically connected with many top flow dividers.
Scheme as a further improvement on the present invention, described test furnace apparatus also include water circulating pipe, water-circulating pipe
Road is wrapped in outside discharge flue and is connected with water pump by electron servo valve；Described control and data acquisition unit is also wrapped
Control for Kiln Temperature loop is included, central processing unit is electrically connected with the electron servo valve on water circulating pipe.
As a further improvement on the present invention scheme, symmetrically arranged at least provided with upper and lower two on described bracing members
Connection member, the back side width dimensions that the spacing between two connection members is supported with grooved coordinate, and each bracing members passes through
Connection member is connected to grooved and supports on the back side.
Scheme as a further improvement on the present invention, described connection member is steel pipe, and its diameter parallel is in reinforced concrete
Soil test floor plate face is arranged, and each bracing members is mutually connected to each other by the connecting rod penetrated in steel pipe.
Scheme as a further improvement on the present invention, described steel ball and steel roller bearing diameter dimension is set to 80～100 ㎜.
Scheme as a further improvement on the present invention, the spacing between described steel ball takes armored concrete test floor plate
Thick 3～5 times.
Used as the preferred version of the present invention, described jack is from synchronous hollow hydraulic jack.
Scheme as a further improvement on the present invention, described flexible refractory material selects refractory fiber cotton.
Scheme as a further improvement on the present invention, described rigid refractory material protective layer selects refractory pipe, and
It is with refractory fiber cotton that the space filling in earthenware is closely knit.
As a further improvement on the present invention scheme, on described body of heater flame-observing hole is arranged.
Compared with prior art, this jack boundary constraint armoured concrete slab Fire-resistance test system is due to being provided with jack
Boundary constraint power is provided, is improved existing reinforced concrete floor fire test technology and is constrained not phase with actual building structural element
The shortcoming for meeting, so can further investigate armoured concrete slab fire-resistance behavior and different boundary constraint effect it is mixed to reinforcing bar
The affecting laws of concrete board fire resistance；Because body of heater can flexibly be determined using removable assembly furnace wall, therefore size dimension, try
Check system is installed, convenient disassembly, and test efficiency is high；Hydraulic jack in boundary constraint device has been reached certainly flat by steel strand wires
Weighing apparatus, therefore without installing reaction frame, make apparatus of the present invention have more economy, versatility；In-furnace temperature adopts thermocouple measurement,
Monitor in real time can be carried out to in-furnace temperature, and can be adjusted at any time so that it is international that in-furnace temperature can well meet ISO834
Standard heating curve or the heating curve of other settings；Due to being provided with temperature acquisition loop, displacement acquisition loop and strain acquirement
Loop, therefore can simultaneously measure the ginsengs such as temperature, the inside and outside displacement of plate plane and the reinforcing bar strain of breadboard inner concrete and reinforcing bar
Number.
Description of the drawings
Fig. 1 is vertical view cutaway drawing of the present invention；
Fig. 2 is the A-A of Fig. 1 to sectional view；
Fig. 3 is the section view of the boundary constraint device of the present invention；
Fig. 4 is the top view of Fig. 3；
Fig. 5 is the layout drawing of the steel ball of the present invention and firm roller bearing；
Fig. 6 is that the long side of armored concrete breadboard has boundary constraint device during boundary constraint to arrange schematic diagram；
Fig. 7 is that the minor face of armored concrete breadboard has boundary constraint device during boundary constraint to arrange schematic diagram；
Fig. 8 is that four sides of armored concrete breadboard have boundary constraint device during boundary constraint to arrange schematic diagram.
In figure：1st, furnace apparatus are tested, 1.1, body of heater, 1.2, steel ball, 1.3, steel roller bearing, 1.4, drop-bottom, 1.5, fuel feed pump
Road, 1.6, integral combustor, 1.7, furnace temperature thermocouple, 1.8, discharge flue, 1.9, water circulating pipe, 2, boundary constraint dress
Put, 2.1, grooved support, 2.2, bracing members, 2.3, connection member, 2.4, steel strand wires, 2.5, jack, 2.6, steel stranded wire clamper,
3rd, load, 4, control and data acquisition unit, 5, armored concrete test floor, 6, flexible refractory material, 7, fuel tank and
Fuel delivery mechanism, 8, water pump, 9, rigid refractory material protective layer, 10, push up flow divider more.
Specific embodiment
Below in conjunction with the accompanying drawings the present invention will be further described.
As shown in Figure 1 and Figure 2, this jack boundary constraint armoured concrete slab Fire-resistance test system includes test furnace apparatus
1st, boundary constraint device 2, load 3 and control and data acquisition unit 4.
Described test furnace apparatus 1 include body of heater 1.1, drop-bottom 1.4, oil supply pipe 1.5, integral combustor 1.6, stove
Warm galvanic couple 1.7 and discharge flue 1.8；
Body of heater 1.1 is protected using refractory material, including assembled furnace wall and connector, is connected by connector between assembled furnace wall
Connect, burner installing hole is provided with body of heater 1.1, steel ball is set between the top surface of body of heater 1.1 and armored concrete test floor 5
1.2 and steel roller bearing 1.3, as shown in figure 5, steel ball 1.2 and steel roller bearing 1.3 are used for spacer bar concrete test floor 5, with suitable
Flexible refractory material 6 filling steel ball 1.2 and steel roller bearing 1.3 between space；
Drop-bottom 1.4 is fixedly connected on the bottom of body of heater 1.1, and exhaust opening is provided with above；
Oil supply pipe 1.5 is arranged circumferentially at outside body of heater 1.1, oil supply pipe 1.5 and fuel tank and fuel delivery mechanism 7
Connection；
The spout of integral combustor 1.6 is arranged towards the inside of body of heater 1.1, and is installed through the burner on body of heater 1.1
Hole is arranged on oil supply pipe 1.5 and with oil supply pipe 1.5 and connects, the junction of integral combustor 1.6 and oil supply pipe 1.5
Installation is connected with electron servo valve and igniter；
Furnace temperature thermocouple 1.7 is arranged on the upper inside wall of body of heater 1.1；
Discharge flue 1.8 is connected with the exhaust opening of drop-bottom 1.4.
As shown in Figure 3, Figure 4, described boundary constraint device 2 include grooved support 2.1, bracing members 2.2, steel strand wires 2.4,
Jack 2.5 and steel stranded wire clamper 2.6 etc.,
Grooved supports 2.1 to be arranged on the edges of boards of the armored concrete test relative position of floor 5, is at least symmetrical arranged one
Right, it is channel steel type mechanism that grooved supports 2.1 sections, and its width of rebate size tests the thickness of floor 5 with armored concrete
Coordinate, and armored concrete test floor 5 is snapped in inside notch；
One or more support 2.1 length directions equal perpendicular to the bracing members 2.2 that armored concrete tests floor 5 along grooved
Even each grooved that is arranged symmetrically in is supported on 2.1 back sides, and each bracing members 2.2 supports 2.1 by connection member 2.3 with grooved
The back side connects；
Symmetrically arranged bracing members 2.2 are connected by steel strand wires 2.4, rigid refractory material is provided with outside steel strand wires 2.4 and is protected
Sheath 9, the one end of steel strand wires 2.4 connection jack 2.5, the other end uses steel through after the top or bottom of the bracing members 2.2 on both sides
Twisted wire fixture 2.6 is clamped, and 2.4, two jack 2.5 and two of upper and lower two steel strand wires are arranged on one group of symmetrical bracing members 2.2
Individual steel stranded wire clamper 2.6, and as illustrated, diagonally set in two jack 2.5 and two cross-wise directions of steel stranded wire clamper 2.6
Put, be connected with many top flow dividers 10 after each parallel connection of jack 2.5, push up flow divider 10 more and be connected with pumping plant.
Described load 3 is placed on armored concrete test floor 5.
Described control and data acquisition unit 4 includes central processing unit, flame control loop, temperature acquisition loop, position
Acquisition circuit, strain acquirement loop and jack control loop are moved, central processing unit is watched with the electronics on integral combustor 1.6
Take valve and igniter electrical connection；Central processing unit is electrically connected with data collecting instrument, and data collecting instrument is electrically connected with furnace temperature thermocouple 1.7
Connect, the thermocouple of data collecting instrument and the measurement concrete being arranged on inside armored concrete test floor 5 and reinforcing bar temperature is electric
Connection；Data collecting instrument and the displacement for measuring the inside and outside displacement in floor level being arranged in the armored concrete test plane of floor 5
Sensor is electrically connected；The foil gauge that data collecting instrument is strained with the measurement reinforcing bar being arranged on inside armored concrete test floor 5
Electrical connection；Central processing unit is electrically connected with many top flow dividers 10.
The Fire-resistance test system of this reinforced concrete floor when in use, tests floor 5 according to armored concrete first
Size is built suitable body of heater 1.1 and installs drop-bottom 1.4, oil supply pipe 1.5, integral combustor 1.6, furnace temperature thermocouple
The miscellaneous part such as 1.7 and discharge flue 1.8, between the top of body of heater 1.1 and test floor steel ball 1.2 and steel roller bearing 1.3 are laid,
The space between steel ball 1.2 and steel roller bearing 1.3 is filled with suitable flexible refractory material 6；
Then grooved support 2.1 is symmetrically arranged on the left and right two ends or rear and front end of armored concrete test floor 5, then
Bracing members 2.2 are arranged on into grooved to support on 2.1, symmetrically arranged bracing members 2.2 are attached by steel strand wires 2.4 and
Rigid refractory material protective layer 9 on string, diagonally arranges two jack 2.5 and two steel stranded wire clampers 2.6 and by adjusting steel
The tensioner steel strand wires 2.4 of twisted wire fixture 2.6, make armored concrete test floor 5 become one with boundary constraint device 2 overall；By steel
Reinforced concrete test floor 5 and the integral hoisting of boundary constraint device 2 on test furnace apparatus 1, be erected at steel ball 1.2 and steel roller bearing
1.3 on；
Then place and the equivalent load 3 of structure design working load on armored concrete test floor 5, such as counterweight
Block etc.；
Then connection is controlled and data acquisition unit 4, by the electron servo on central processing unit and integral combustor 1.6
Valve and igniter are electrically connected, and central processing unit is electrically connected with data collecting instrument, and data collecting instrument is electrically connected with furnace temperature thermocouple 1.7
Connect, the thermocouple of data collecting instrument and the measurement concrete being arranged on inside armored concrete test floor 5 and reinforcing bar temperature is electric
Connection, data collecting instrument and the displacement for measuring the inside and outside displacement in floor level being arranged in the armored concrete test plane of floor 5
Sensor is electrically connected, the foil gauge that data collecting instrument is strained with the measurement reinforcing bar being arranged on inside armored concrete test floor 5
Electrical connection；Finally, lighted a fire using computer controls.
This jack boundary constraint armoured concrete slab Fire-resistance test system can Real-time Collection furnace temperature and furnace pressure, control furnace temperature
Heated up by setting curve, floor inner concrete and reinforcing bar temperature in the test of data acquisition instrument Real-time Collection, floor it is flat
The parameter such as the inside and outside displacement in face and reinforcing bar high-temp strain；The hydraulic oil in jack is carried out point by control many top flow dividers 10
Stream, so as to control the size and speed of the applying of boundary constraint power.
Generally, the control of furnace temperature can be controlled by flame control loop, i.e., central processing unit is by number
Send according to the feedback of Acquisition Instrument and instruct the folding size for controlling the electron servo valve on integral combustor 1.6 to control fuel delivery
Size, but the reduction of the internal temperature of body of heater 1.1 is only by reducing fuel delivery control, it is very slow that it reduces speed, therefore is
Further quick effective control furnace temperature, scheme as a further improvement on the present invention, described test furnace apparatus 1 also include water
Circulating line 1.9, water circulating pipe 1.9 is wrapped in outside discharge flue 1.8 and is connected with water pump 8 by electron servo valve；Institute
The control stated and data acquisition unit 4 also include Control for Kiln Temperature loop, and central processing unit is watched with the electronics on water circulating pipe 1.9
Valve electrical connection is taken, the flow velocity of recirculated water is controlled by controlling the folding size of the electron servo valve on water circulating pipe 1.9, work as stove
When temperature is high, the flow velocity of recirculated water is accelerated, and when furnace temperature is low, closes recirculated water, and then realizes quick effective control furnace temperature.
In order to be further ensured that bracing members 2.2 are arranged on steel when grooved supports steadiness and jack 2.5 on 2.1 to press
The harmony of 2.2 pairs of armored concrete test floor 5 border pressures is supported, as a further improvement on the present invention scheme, described
Bracing members 2.2 at least provided with upper and lower two symmetrically arranged connection members 2.3, the spacing between two connection members 2.3
The back side width dimensions that 2.1 are supported with grooved coordinate, and each bracing members 2.2 is connected to grooved and supports by connection member 2.3
On 2.1 back sides, firm connection and balanced pressure are realized.
In order to be further ensured that jack 2.5 is tested armored concrete when the border of floor 5 presses to the same of border pressure
Step property, prevents because alignment error causes pressure asynchronous, as a further improvement on the present invention scheme, described connection member
2.3 is steel pipe, and its diameter parallel is arranged in armored concrete test floor 5 plate face, and each bracing members 2.2 is by penetrating steel pipe
Interior connecting rod is mutually connected to each other, so as to prevent because alignment error causes pressure asynchronous.
According to GB/T 50152-2012《Standard for test methods of concrete structures》, it is the load in guarantor unit's length, make
For further improvement of the present invention scheme, described steel ball 1.2 and the diameter dimension of steel roller bearing 1.3 is set to 80～100 ㎜.
According to GB/T 9978.1-2008《Building element fire resistance test method》, it is to ensure enough support degrees, as
Further improvement of the present invention scheme, the spacing between described steel ball 1.2 takes the 3～5 of the armored concrete test thickness of slab of floor 5
Times.
Jack 2.5 can be from mechanical screw jack or hydraulic jack, due to hydraulic jack roof construction
Simple and output pressure is stable, therefore preferably hydraulic jack, i.e. used as the preferred version of the present invention, described jack 2.5
From synchronous hollow hydraulic jack.
It is closely knit in order to ensure the filling of the space between steel ball 1.2 and steel roller bearing 1.3, it is square as a further improvement on the present invention
Case, described flexible refractory material 6 selects refractory fiber cotton.
In order to effective protection is through the steel strand wires 2.4 of test furnace apparatus 1, avoid burning damage, as the present invention one is entered
Step improvement project, described rigid refractory material protective layer 9 selects refractory pipe, and with refractory fiber cotton by earthenware
Space filling is closely knit.
Situations such as the ease of observing the combustion case and test specimen of the flame of body of heater 1 by fire, as the present invention one is entered
Step improvement project, on described body of heater 1.1 flame-observing hole is arranged.
Embodiment：Design armored concrete test floor 5 grow × wide size be 4300 ㎜ × 3300 ㎜, thickness of slab be 120 ㎜.
Fire-resistance test is carried out by the armoured concrete slab that boundary constraint is acted on to this.
Body of heater 1.1 is by 100 ㎜ steel plates（Outward）With 200 ㎜ refractory fiber cottons（It is interior）Constitute, gross thickness is 300 ㎜, it is final true
Length × wide the size for determining body of heater is 4000 ㎜ × 3000 ㎜, and on furnace wall of the body of heater per side two integral combustors are evenly arranged
1.3, diameter is set between the top of body of heater 1.1 and breadboard 5 and is the steel ball 1.2 and steel roller bearing 1.3 of 100 ㎜ as support, steel
Sphere gap takes 400 ㎜ in long side direction, and short side direction takes 300 ㎜, and with refractory fiber cotton steel ball 1.2 and steel roller bearing 1.3 are filled
Between space.
The concrete condition of floor 5 arrangement boundary constraint device 2 is tested according to armored concrete, selects refractory protection of pipe to wear
The steel strand wires 2.4 of body of heater 1.1 are crossed, it is with refractory fiber cotton that the space filling in earthenware is closely knit.
When there is boundary constraint on the long side that armored concrete tests floor 5, boundary constraint device 2 arrangement such as Fig. 6.
When the minor face that armored concrete tests floor 5 has boundary constraint, boundary constraint device 2 arranges such as Fig. 7.
When there is boundary constraint on four sides that armored concrete tests floor 5, boundary constraint device 2 arranges such as Fig. 8.
Discharge flue 1.5 and water circulating pipe 1.6 are in effective working range, are easy to smoke evacuation in time.
The loading blocks of 20kg are evenly arranged in the plate face of breadboard 5, uniform live load 2KN/ ㎡ is simulated.
During test, thermocouple is embedded in armored concrete test floor 5, displacement meter and reinforcing bar foil gauge are arranged in phase
Measuring point is answered, then the instruments such as thermocouple, displacement meter and foil gauge data collecting instrument, final data collection is wired to into
Instrument is connected with computer, carries out automatically controlling furnace temperature, and Real-time Collection test data by computer.
After debugging correlation test instrument, lighted a fire by computer controls, start test, gather correlation test data.
During test, the hydraulic oil in jack is shunted by controlling many top flow dividers 10 of hollow jack, from
And control size and the speed that boundary constraint power applies.
This jack boundary constraint armoured concrete slab Fire-resistance test system improves existing reinforced concrete floor fire
Experimental technique constrains inconsistent shortcoming with actual building structural element, and then can further investigate the fire of armoured concrete slab
Behavior and different boundary constraints act on the affecting laws to armoured concrete slab fire resistance；Pilot system is installed, dismounting
Convenient, test efficiency is high；Without installing reaction frame, this device is set to have more economy, versatility；In-furnace temperature adopts thermocouple
Measurement, can carry out monitor in real time to in-furnace temperature, and can be adjusted at any time so that in-furnace temperature can well meet ISO834
International standard heating curve or the heating curve of other settings；Can measure simultaneously breadboard inner concrete and reinforcing bar temperature,
The parameter such as the inside and outside displacement of plate plane and reinforcing bar strain.
Claims (10)
1. a kind of jack boundary constraint armoured concrete slab Fire-resistance test system, including test furnace apparatus（1）, boundary constraint dress
Put（2）, load（3）With control and data acquisition unit（4）, test furnace apparatus（1）Including body of heater（1.1）, drop-bottom
（1.4）, oil supply pipe（1.5）, integral combustor（1.6）, furnace temperature thermocouple（1.7）And discharge flue（1.8）, body of heater
（1.1）Protected using refractory material, including assembled furnace wall and connector, connected by connector between assembled furnace wall, body of heater
（1.1）On be provided with burner installing hole；Drop-bottom（1.4）It is fixedly connected on body of heater（1.1）Bottom, is provided with above exhaust opening；
Oil supply pipe（1.5）It is arranged circumferentially at body of heater（1.1）Outside, oil supply pipe（1.5）With fuel tank and fuel delivery mechanism（7）
Connection；Integral combustor（1.6）Spout towards body of heater（1.1）Inside is arranged, and through body of heater（1.1）On burner peace
Dress hole is arranged on oil supply pipe（1.5）Upper and and oil supply pipe（1.5）Connection, integral combustor（1.6）With oil supply pipe
（1.5）Junction install be connected with electron servo valve and igniter；Furnace temperature thermocouple（1.7）It is arranged on body of heater（1.1）Inwall
Top；Discharge flue（1.8）With drop-bottom（1.4）Exhaust opening connection；
Load（3）It is placed on armored concrete test floor（5）On；
Control and data acquisition unit（4）Return including central processing unit, flame control loop, temperature acquisition loop, displacement acquisition
Road and strain acquirement loop, central processing unit and integral combustor（1.6）On electron servo valve and igniter electrical connection；In
Central processor is electrically connected with data collecting instrument, data collecting instrument and furnace temperature thermocouple（1.7）Electrical connection, data collecting instrument and setting
Floor is tested in armored concrete（5）The thermocouple electrical connection of internal measurement concrete and reinforcing bar temperature；Data collecting instrument with
It is arranged on armored concrete test floor（5）The displacement transducer electrical connection of the inside and outside displacement in measurement floor level in plane；Number
Floor is tested according to Acquisition Instrument with armored concrete is arranged on（5）The foil gauge electrical connection of internal measurement reinforcing bar strain；
Characterized in that, described body of heater（1.1）Top surface and armored concrete test floor（5）Between steel ball is set（1.2）With
Steel roller bearing（1.3）, use flexible refractory material（6）Filling steel ball（1.2）With steel roller bearing（1.3）Between space；
Described boundary constraint device（2）Support including grooved（2.1）, bracing members（2.2）, steel strand wires（2.4）, jack
（2.5）And steel stranded wire clamper（2.6）；
Grooved is supported（2.1）It is arranged on armored concrete test floor（5）On the edges of boards of relative position, one is at least symmetrical arranged
Right, grooved is supported（2.1）Section is channel steel type mechanism, and its width of rebate size tests floor with armored concrete（5）Thickness
Dimensional fits, and armored concrete test floor（5）Snap in inside notch；
One or more test floor perpendicular to armored concrete（5）Bracing members（2.2）Support along grooved（2.1）Length direction
Symmetrically it is arranged in each grooved to support（2.1）On the back side, each bracing members（2.2）Connection by being secured to connect
Part（2.3）Support with grooved（2.1）The back side connects；
Symmetrically arranged bracing members（2.2）By steel strand wires（2.4）Connection, steel strand wires（2.4）Outside is provided with rigid refractory material
Protective layer（9）, steel strand wires（2.4）One end connects jack（2.5）, bracing members of the other end through both sides（2.2）Top or
Steel stranded wire clamper is used behind bottom（2.6）Clamping, one group of symmetrical bracing members（2.2）It is upper that upper and lower two steel strand wires are set（2.4）、
Two jack（2.5）With two steel stranded wire clampers（2.6）, and two jack（2.5）With two steel stranded wire clampers（2.6）Cut
Face is diagonally arranged on direction, each jack（2.5）With many top flow dividers after parallel connection（10）Connection, pushes up flow divider more（10）With pump
Stand connection；
Described control and data acquisition unit（4）Also include jack control loop, central processing unit and many top flow dividers
（10）Electrical connection.
2. jack boundary constraint armoured concrete slab Fire-resistance test system according to claim 1, it is characterised in that institute
The test furnace apparatus stated（1）Also include water circulating pipe（1.9）, water circulating pipe（1.9）It is wrapped in discharge flue（1.8）Outward
Portion and by electron servo valve and water pump（8）Connection；Described control and data acquisition unit（4）Also return including Control for Kiln Temperature
Road, central processing unit and water circulating pipe（1.9）On electron servo valve electrical connection.
3. jack boundary constraint armoured concrete slab Fire-resistance test system according to claim 1 and 2, its feature exists
In described bracing members（2.2）On at least provided with upper and lower two symmetrically arranged connection members（2.3）, two connection members
（2.3）Between spacing and grooved support（2.1）Back side width dimensions coordinate, each bracing members（2.2）Pass through connecting portion
Part（2.3）It is connected to grooved support（2.1）On the back side.
4. jack boundary constraint armoured concrete slab Fire-resistance test system according to claim 3, it is characterised in that institute
The connection member stated（2.3）It is steel pipe, its diameter parallel tests floor in armored concrete（5）Plate face is arranged, each bracing members
（2.2）Connecting rod by penetrating in steel pipe is mutually connected to each other.
5. jack boundary constraint armoured concrete slab Fire-resistance test system according to claim 1 and 2, its feature exists
In described steel ball（1.2）With steel roller bearing（1.3）Diameter dimension is set to 80～100 ㎜.
6. jack boundary constraint armoured concrete slab Fire-resistance test system according to claim 1 and 2, its feature exists
In described steel ball（1.2）Between spacing take armored concrete test floor（5）3～5 times of thickness of slab.
7. jack boundary constraint armoured concrete slab Fire-resistance test system according to claim 1 and 2, its feature exists
In described jack（2.5）From synchronous hollow hydraulic jack.
8. jack boundary constraint armoured concrete slab Fire-resistance test system according to claim 1 and 2, its feature exists
In described flexible refractory material（6）From refractory fiber cotton.
9. jack boundary constraint armoured concrete slab Fire-resistance test system according to claim 1 and 2, its feature exists
In described rigid refractory material protective layer（9）From refractory pipe, and the space in earthenware is filled out with refractory fiber cotton
Fill closely knit.
10. jack boundary constraint armoured concrete slab Fire-resistance test system according to claim 1 and 2, its feature exists
In described body of heater（1.1）Upper setting flame-observing hole.
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| CN104677940B (en) * | 2015-01-30 | 2017-10-17 | 中国矿业大学 | A kind of reinforced concrete shell Fire-resistance test system |
| CN104677667B (en) * | 2015-03-24 | 2017-03-01 | 南京工业大学 | Fire resistance test device and method capable of providing axial elastic constraint of component |
| WO2017091176A1 (en) | 2015-11-26 | 2017-06-01 | Bogazici Universitesi | A fire resistance test mechanism providing symmetric boundary conditions |
| CN106198620B (en) * | 2016-09-30 | 2019-02-01 | 公安部天津消防研究所 | A kind of structural elements temperature rise experimental provision and application method |
| CN107290510A (en) * | 2017-06-13 | 2017-10-24 | 太原理工大学 | A kind of test device and method of high performance concrete steam inside pressure |
| CN107478677B (en) * | 2017-06-27 | 2020-02-14 | 中国矿业大学 | Spring or damper boundary constraint multi-constraint reinforced concrete slab fire resistance test system |
| CN107402226B (en) * | 2017-07-24 | 2024-03-19 | 华侨大学 | Fire resistance test device and method for concrete roof of underground space structure |
| CN107727681B (en) * | 2017-09-05 | 2020-12-25 | 中国矿业大学 | Reinforced concrete slab fire resistance test device of slope |
| CN107884262B (en) * | 2017-10-27 | 2020-03-17 | 中国矿业大学 | Punching, shearing and fatigue failure test device for reinforced concrete floor slab under fire |
| CN109406279A (en) * | 2018-12-04 | 2019-03-01 | 华侨大学 | The experimental provision and experimental method of superstructure micromechanism of damage when a kind of research fire |
| CN109916748B (en) * | 2019-03-28 | 2021-05-25 | 山东科技大学 | Fire and impact real-time coupling test system for building structural member |
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| CN101408536A (en) * | 2008-11-28 | 2009-04-15 | 哈尔滨工业大学 | Fire-proof test device of concrete multi-span continues beam or plate |
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| JPH11193587A (en) * | 1997-12-26 | 1999-07-21 | Kazutoshi Torisawa | Construction of reinforced concrete structure |
| JP4003814B2 (en) * | 2003-06-02 | 2007-11-07 | 株式会社熊谷組 | How to select fire resistance specifications for high strength concrete members |
| KR20100035336A (en) * | 2008-09-26 | 2010-04-05 | 한국전력공사 | Temperature heating device, temperature heating test device and method using the same |
| US20100154332A1 (en) * | 2008-12-23 | 2010-06-24 | Chevron U.S.A. Inc. | Base mat assembly and method of constructing the same |
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| CN101408536A (en) * | 2008-11-28 | 2009-04-15 | 哈尔滨工业大学 | Fire-proof test device of concrete multi-span continues beam or plate |
| CN101477108A (en) * | 2009-01-24 | 2009-07-08 | 哈尔滨工业大学 | Peripheral support full-size steel reinforced concrete two-way slab fire-resistant tester and its implementing method |
| CN204008516U (en) * | 2014-08-25 | 2014-12-10 | 中国矿业大学 | The anti-fiery pilot system of lifting jack boundary constraint armoured concrete slab |
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