CN106644324B - A kind of experimental rig can be used for light steel frame bean column node Experiment of Mechanical Behavior - Google Patents
A kind of experimental rig can be used for light steel frame bean column node Experiment of Mechanical Behavior Download PDFInfo
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- CN106644324B CN106644324B CN201611253839.1A CN201611253839A CN106644324B CN 106644324 B CN106644324 B CN 106644324B CN 201611253839 A CN201611253839 A CN 201611253839A CN 106644324 B CN106644324 B CN 106644324B
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- 238000006073 displacement reaction Methods 0.000 claims abstract description 22
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M5/00—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings
- G01M5/0041—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by determining deflection or stress
- G01M5/005—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by determining deflection or stress by means of external apparatus, e.g. test benches or portable test systems
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M5/00—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings
- G01M5/0041—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by determining deflection or stress
- G01M5/005—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by determining deflection or stress by means of external apparatus, e.g. test benches or portable test systems
- G01M5/0058—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by determining deflection or stress by means of external apparatus, e.g. test benches or portable test systems of elongated objects, e.g. pipes, masts, towers or railways
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Abstract
The invention discloses a kind of experimental rig for light steel frame bean column node Experiment of Mechanical Behavior, which includes the device bottom plate fixed with universal testing machine assembly, the lower bayonet slot that assembles light steel frame column, upper card slot, the fastening bolt of fixed light steel frame column, the upper cover plate of fixed light steel frame column, forms for changing the bottom plate elongated slot of loading Position, the side plate of connecting bottom board and top plate, the clamping plate of beam-ends load, the toggle for loading end, beam-column connection test specimen, mechanics universal testing machine.Entire experimental rig can not only more effectively realize bean column node Experiment of Mechanical Behavior constraint condition；Mechanics parameter of the bean column node test specimen under load can also be measured using tools such as foil gauge, dial gauge, displacement sensor, force snesors while load, to be analyzed its force-mechanism and mechanical model, be studied.Package unit construction is clear, easy to use, cost is relatively low, is a kind of novel test device suitable for small-sized light beam-column specimen joints.
Description
Technical field
The present invention relates to a kind of experimental rigs that can be used for light steel frame bean column node Experiment of Mechanical Behavior, belong to building work
Journey technical field.
Background technique
Recently as people to the pay attention to day by day of environmental protection and energy saving, housing industrialization and greatly improving for China's output of steel,
The highest attention that the good structure with assembled lightweight steel of small, short time limit, heat preservation and energy conservation effects causes government and research institution is polluted,
More and more scholars have carried out in-depth study to this structure.Research based on light girder steel, the component level of light steel column
It is more, and the research of layer of structure is risen to from the research of component level, the stress performance of beam-column connection is most to close
The link of key.Beam-column connection is connected to various components in structural system, plays a part of transmitting load, Distributing loads,
Therefore the stress performance of bean column node decides the stress performance of total in a way, and the research to bean column node is also
The key of light steel frame research.Traditional steel-structure beam-column node Experiment of Mechanical Behavior generally requires the structure in large span
Hall is tested to carry out, need counter force wall, earth anchor screw rod, large-scale jack and large-tonnage actuator, and lift test specimen and other items
The overhead traveling crane needed is hung, and experimentation cost is higher, and the period is longer.
It is compared with high-rise and large span steel structure bean column node test specimen, light steel frame bean column node small, lotus with member section
The features such as small, displacement is small is carried, if also continuing to use preceding method when studying its stress performance, not only actuator, jack etc. are filled
It sets and is all difficult to exactly match, and the pitch-row of anchor hole, the pitch-row of counter force wall are all larger, the test to small-size test piece is owned
The device of fixed test specimen requires to customize again.The present invention, which provides one kind, can be used for light steel frame bean column node Experiment of Mechanical Behavior
Experimental rig and the practice, to solve the problems such as traditional experiment plant bulk is excessive, experimentation cost is high, site requirements is high.
Summary of the invention
The purpose of the present invention is to provide a kind of experimental rigs that can be used for light steel frame bean column node Experiment of Mechanical Behavior
And the practice, to solve the problems such as conventional node experimental rig occupied space is big, at high cost, replacement is inconvenient.
To achieve the above object, the present invention adopts the following technical scheme:
A set of experimental rig that can be used for light steel frame bean column node Experiment of Mechanical Behavior, the device include device bottom plate
(1), lower bayonet slot (2), upper card slot (3), fastening bolt (4), upper cover plate (5), bottom plate elongated slot (6), side plate (7), clamping plate (8), hinge
Bar (9), beam-column connection test specimen (10), mechanics universal testing machine (11).
Beam-column connection test specimen (10) is T shape test specimen, and the upper and lower ends of test specimen are respectively the structure of column, and horizontal direction is
The structure of beam.
Mechanics universal testing machine (11) is bolted with device bottom plate (1), and side plate (7) is welded on device bottom plate vertically
(1) two sides, the upper and lower ends of beam-column connection test specimen (10) pass through upper cover plate (5) respectively, device bottom plate (1) is fixed, under
Card slot (2) is arranged on device bottom plate (1), and upper card slot (3) is arranged on upper cover plate (5), lower bayonet slot (2) and upper card slot (3)
Position is corresponding；The upper and lower ends of beam-column connection test specimen (10) are respectively charged into card slot (3), lower bayonet slot (2), and beam column connects
Connect specimen joints (10) and lower bayonet slot (2), upper card slot (3) is fastened by fastening bolt (4)；Bottom plate elongated slot (6) is arranged in device
On bottom plate (1), for changing loading Position.
Clamping plate (8) is arranged at beam-column connection test specimen (10) beam-ends load, and mechanics universal testing machine (11) passes through hinge
Bar (9) is connect with clamping plate (8).
The bottom of experimental rig is arranged in fixed device bottom plate (1) with universal testing machine assembly, is entire experimental rig
The critical component being connect with mechanics universal testing machine (11).Device bottom plate (1) is made by Q235 steel or Q345 steel, with a thickness of 25mm
~35mm is fixed on the load bottom plate of universal testing machine (11) by the bolt that 5~6 diameters are 24mm~30mm, mechanics examination
Load bottom plate thickness 35mm~40mm of machine is tested, there is biggish rigidity, biggish vertical load, the dress being connected thereto can be born
Bottom set plate is side plate (7) and bean column node test specimen (10) provides reliable bearing.
Lower bayonet slot (2) shape for assembling light steel frame column is identical as the column section of lower end of bean column node test specimen (10), is
It is fixed convenient for the installation of bean column node test specimen (10), the size of lower bayonet slot (2) is greater than the column cross-section size of lower end, lower bayonet slot
(2) 1mm is respectively had more outward along four sides.In order to avoid being damaged when load to the load bottom plate of mechanics universal testing machine (11),
The depth of lower bayonet slot (2) is 10mm smaller than device bottom plate (1) or so, should be 20mm~25mm, this depth guarantee load at present
Card slot (2) can the column lower end firmly to bean column node test specimen (10) play wedge action.The theory tested according to bean column node
It is required that form a kind of theoretically hinged machine after the column lower end of bean column node test specimen (10) is fixed on lower bayonet slot (2)
The lower bayonet slot (2) of structure, the assembly light steel frame column of experimental rig complies fully with the theory calls of test.
Upper card slot (3) shape is identical as end section on the column of bean column node test specimen, for the ease of bean column node test specimen (10)
Inclination is pierced into card slot (3) from below, and the size of upper card slot (3) is bigger than column upper end sectional dimension, and four sides of upper card slot (3) are outside
Respectively have more 10mm~15mm.The steel plate thickness of upper card slot (3) is identical as the depth of lower bayonet slot (2), guarantees bean column node test specimen
Upper end, lower end are all in hinged state.
The fastening bolt (4) one of fixed light steel frame column shares eight, at lower bayonet slot (2) there are four, have at upper card slot (3)
Four, fastening bolt (4) is to ensure that the key measure of lower bayonet slot clamping bean column node test specimen (10).Due to machinery processing apparatus
When, bean column node test specimen (10), upper card slot (3), the gap between lower bayonet slot (2) are difficult to avoid that, and these gaps are in load
There is horizontal displacement in the styletable up and down that will cause bean column node test specimen (10), then influences the reading of beam end displacement, this is examination
Test not permitted appearance.Bean column node test specimen (10) is fitted into card slot (3), in lower bayonet slot (2) after, cover upper cover plate
(5), bolt is tightened after entering the fastening bolt (4) of light steel frame column, it is ensured that in load, upper and lower styletable is in the state clamped, will
Probably due to experimental error caused by redundant displacement is reduced to minimum limit.
The upper cover plate (5) of fixed light steel frame column is to ensure that the key of axis pressure is fixed and applied in bean column node test specimen upper end
Component.Since the size of upper card slot (3) side more every than the column upper end of bean column node test specimen (10) has more 10mm~15mm, such as Fig. 2 institute
Show, in the bottom of upper cover plate (5), have a rectangular box shape protrusion, just occupy the gap for 10mm~15mm that this has more,
It is covered in upper cover plate (5), and after upper cover plate and upper card slot (3) are connected and fixed with four bolts, then with four fastening bolts (4)
It tightens, the upper end for allowing for bean column node test specimen is limited horizontal displacement completely, and not limit flexion, is met theoretical hinged
Mechanical model, reach the requirement of bean column node Experiment of Mechanical Behavior.As shown in Fig. 2, can also be installed above upper cover plate (5)
Small-size jack or brute spring (20kN~80kN) apply axis pressure for styletable, simulate light steel column completely at work
Stress.
Bottom plate elongated slot (6) for changing loading Position is to change load when making beam-column connection Experiment of Mechanical Behavior
The key Design of point.According to test objective, when needing to study node area flexural property, load(ing) point needs bean column node test specimen (10)
Will be close to beam end, when if necessary to study node area ultimate shear capacity, load(ing) point needs to be moved near bean column node root, section
Except point area, since mechanics universal testing machine (11) can not move, and bean column node test specimen (10) is fixed in test dress
It sets, entire experimental rig can only be moved to change the position of load(ing) point, this movement will lean on for changing load point
The bottom plate elongated slot (6) set realizes, the bolt between back-off assembly bottom plate (1) and mechanics universal testing machine (11) load bottom plate,
So that whole device is slided into design position, then tighten bolt, the change of loading Position can be realized.
The side plate (7) of connecting bottom board and top plate plays a key role the globality of experimental rig.Side plate lower part and dress
Bottom set plate (1) welding, the top plate welding where top and upper card slot (3), side plate (7) will have enough rigidity to can guarantee lower bayonet slot
(2) and the relative position of upper card slot (3), while side plate (7) will have enough tensile capacity, when beam-ends is by larger pulling force,
This pulling force can be transmitted to top plate by bean column node test specimen (10), and top plate need side plate haul could guarantee test be normally carried out.
The thickness of side plate (7) selects the value between 15mm~25mm according to the size of vertical load.Since test process needs connection position
The connecting lines such as displacement sensor, strain transducer, force snesor further need exist for the experimental phenomena in observation node area, so two
The hole of triangle has been opened in the little region of stress in a side plate, as shown in Figure 1.
Clamping plate (8) effect of beam-ends load is fixed beam-ends, the load of load end is transmitted to beam-ends, therefore in beam column section
Point test specimen (10) is installed the upper and lower of rear plate (8) in place and must be fixed with high-strength bolt.Due to beam-ends load when be divided into pulling force and
Pressure, clamping plate (8) are also just divided into two operating conditions: downwards when load, upper clamp plate directly acts on beam-ends top surface, the spiral shell between lower clamp plate
Bar and lower clamp plate stress are little；Upwards when load, lower clamp plate holds curved scissors effect, and four screw rods bear axial tension.Folder up and down
The thickness of plate (8) is in 20~25mm, and four screw diameters are in 14mm~20mm.
The toggle (9) of load end is the critical component for vertical load being transmitted to from load crossbeam beam-ends.Toggle (9) exists
There are two operating condition when load: downwards when load, upper clamp plate (8) is close to beam-ends upper surface and parallel always, herein toggle (9)
Rotational angle slowly becomes larger also with the increase of beam-ends vertical displacement；Upwards when load, toggle (9) bears biggish pulling force, because
This should be constantly in exceptionally straight state, i.e., no corner.The axis for being dimensioned to guarantee toggle net area and centre of toggle (9)
It can bear the maximum pull that load crossbeam can apply and ensure not generate obvious deformation.
Beam-column connection test specimen (10) is designed according to test objective.Light steel column uses square section, and light girder steel can
Using square section or rectangular section, I-shaped cross-section, if using I-shaped cross-section, to make test specimen holding in load
Stablize, needs the web height at the node area of I-shaped cross-section, load(ing) point that rectangle ribbed stiffener is set.
Mechanics universal testing machine (11) is loading device and the measurement, operational instrument of the test.Mechanics used in the present apparatus
Universal testing machine is double lead series, is made of measuring system, drive system, control system and computer, has precision height, speed regulation
Range is wide, compact-sized, easy to operate, steady performance.
The present invention relates to a kind of experimental rig and the practice that can be used for light steel frame bean column node Experiment of Mechanical Behavior, tools
The body practice is following (as shown in Figure 1):
Step 1: the steel of two pieces of bottom plates, two blocks of side plates, one piece of top plate, one piece of backboard is cut into according to design size respectively
Plate, required precision are controlled in ± 0.5mm, process the square groove of top plate after cutting on lathe；It mills out rectangular on bottom plate
Slot and five elongated slots；The vee gutter being cut on two side plates.
Step 2: each block of steel plate above-mentioned is welded in the relative position according to design, two pieces of bottom plates are under, and two blocks of side plates are in
Between, for top plate upper, backboard has both the effect of ribbed stiffener between bottom plate, top plate and side plate.To ensure weldquality when welding
Not less than B grades, each weld width and length will meet the requirement of existing " Code for design of steel structures ".Top plate and side plate, bottom plate with
Side plate will add small-sized ribbed stiffener, thickness 10mm, and high and long size is no more than 50mm.
Step 3: device is fixed on mechanics universal testing machine with the bolt of 24~30mm first according to design scheme
Load bottom plate on, adjust front-rear position.Then force snesor, connection are installed on the load crossbeam of mechanics universal testing machine
Vertical pivot, toggle, upper clamp plate.
Step 4: installation beam-column connection test specimen, when installation, first tilts test specimen, by the column upper end of test specimen from upper card slot
It is pierced by from bottom to top, is lifted test specimen then up, fall into the lower bayonet slot on bottom plate to newel post bottom under test specimen, then tighten card up and down
Upper cover plate is aligned with upper card slot, covers upper cover plate by eight fastening bolts in slot, sets the equipment for adding axis pressure, uses bolt
Upper cover plate is fixed on top plate.
Step 5: the various lines of connection strain transducer, displacement sensor, force snesor.It will with upper clamp plate and lower clamp plate
Beam-column connection test specimen clamps.Various sensors are debugged, load and data acquisition are started.
Compared with prior art, the experimental rig that can be used for light steel frame bean column node Experiment of Mechanical Behavior of the invention,
It has the advantage that
(1) at low cost: the present invention includes the steel plate that novel bean column node Experiment of Mechanical Behavior device is 15~35mm thickness
It is made by processes such as cutting, milling, welding, spray paintings, the cost of set of device (is free of mechanics universal test lower than 1500 yuan
Machine).And traditional beam-column connection stress performance relies on counter force wall, anchor hole, ground anchor bolt, lateral confinement device, horizontal actuation
The large-scale experiments such as device, crane room equipment, expense is up to 5000 yuan or more.
(2) hardware requirement is not high, and be easy to promote: the steel-structure beam-column node type at present in engineering is more, many to lack
The weary mechanical property research compared with system, and traditional bean column node Experiment of Mechanical Behavior needs the structural test hall that overhead traveling crane is hung
It is difficult to large-scale experiments equipment, many colleges and universities and research institutions such as counter force walls.And experimental rig of the present invention can be with
Implement test on mechanics universal testing machine, belongs to pilot plant unit, be more easier to promote.
(3) load is simple, and data acquisition is accurate: load is controlled using the computer of mechanics universal testing machine, and loading velocity has
Many gears can be controlled accurately, and dial gauge, stay wire displacement sensor, common displacement sensing can be used in data acquisition equipment
Device, fine data acquisition system etc., the load-displacement curve drawn out is more fine, and test effect is preferable.And traditional large size
Bean column node testing equipment uses oil pump control, and since load is larger, precision is relatively poor, and data acquiring frequency is lower.
(4) easy to operate:
Compared with traditional bean column node stress test, this experimental rig is small in size, and installation, wiring, is adopted disassembly test specimen
The workload of the links such as collection, arrangement measuring tool decreases, and accelerates and changes the time used in part, improves work efficiency,
And data acquisition, styletable achieved by traditional bean column node Experiment of Mechanical Behavior add the drafting of axis pressure, load-displacement curve
Etc. functions can realize, be a kind of new and effective experimental rig being worthy to be popularized.
Detailed description of the invention
Fig. 1 is a kind of stereoscopic schematic diagram of experimental rig that can be used for light steel frame bean column node Experiment of Mechanical Behavior；
Fig. 2 is can be in the stereoscopic schematic diagram of the multifunctional cover plate of capital application axis pressure；
Fig. 3 is the operation schematic diagram one loaded after experimental rig of the invention is installed on mechanics universal testing machine
Fig. 4 is the operation schematic diagram loaded after experimental rig of the invention is installed on mechanics universal testing machine
Two.
In figure: 1, with universal testing machine assembly fixed device bottom plate, 2, assemble the lower bayonet slot of light steel frame column, 3, upper card
Slot, 4, the fastening bolt of fixed light steel frame column, 5, the upper cover plate of fixed light steel frame column, 6, for changing loading Position
Bottom plate elongated slot, 7, the side plate of connecting bottom board and top plate, 8, the clamping plate of beam-ends load, 9, load the toggle of end, 10, beam-to-column joint
Specimen joints, 11, mechanics universal testing machine.
Specific embodiment
The present invention will be further described combined with specific embodiments below.
As shown in Figure 1, a kind of experimental rig that can be used for light steel frame bean column node Experiment of Mechanical Behavior, the device include
Fixed device bottom plate (1) is assembled with universal testing machine, the lower bayonet slot (2) for assembling light steel frame column, upper card slot (3), is fixed gently
Upper cover plate (5), the bottom plate elongated slot for changing loading Position of the fastening bolt (4) of Steel Frame Column, fixed light steel frame column
(6), toggle (9), the beam-column connection of the side plate (7) of connecting bottom board and top plate, beam-ends load clamping plate (8), load end
Test specimen (10), mechanics universal testing machine (11).The experimental rig passes through cutting, milling, welding, spray by the steel plate of 15~35mm thickness
The processes such as paint are made, Q235 or Q345 steel plate can be used, the machining accuracy of each section should be maintained within ± 0.5mm.Device bottom
Plate should be able to bear the vertical pressure not less than 100kN without obviously becoming together with the load bottom plate of mechanics universal testing machine
Shape, side plate should be able to bear the vertical tension not less than 100kN without obviously deforming.Side plate and bottom plate, side plate and top plate
Weld seam should be able to be born not less than the pulling force of 100kN and the unlikely obvious stretcher strain of generation.Device top plate should be able to bear bean column node
The unlikely not less than the load of the jacking of 100kN upwards of test specimen generates apparent bending deformation.According to steel density 7800kg/
m3Estimation, the weight of whole device is about within 200kg.Since the steel of bottom plate, side plate, top plate all have biggish thickness
(20~35mm) and biggish rigidity, and the steel general thickness of the beam column component of light steel frame is only 4~8mm, therefore entire
Experimental provision can more effectively constrain the upper and lower displacement of bean column node test specimen, and the horizontal fastening bolt on upper lower bayonet slot and card slot
The horizontal displacement of bean column node test specimen can be preferably constrained again, and entire constraint meets bean column node Experiment of Mechanical Behavior needs
The mechanical condition of " upper and lower limit levels and vertical displacement, hinged, not limit flexion plus axis pressure " etc.；And omnipotent mechanics machine
Load crossbeam pump the load being exerted by beam-ends be able to satisfy again bean column node Experiment of Mechanical Behavior needs
The Protonation constant of " horizontal cyclic loading exteriment load "；It, can be in the toggle upper end installing force of load end after test specimen installation is in place
Sensor come real-time measurement be added in bean column node test specimen beam-ends vertical force numerical value and variation, strain can be arranged on test specimen
The tools such as piece, dial gauge, displacement sensor measure deformation of the bean column node test specimen under load, to show that bean column node tries
The actual parameter of the stress performance of part is analyzed it, is studied, and studies its force-mechanism and mechanical model, is bean column node
The design and application of pattern provide foundation.
It is an exemplary embodiments of the invention above, implementation of the invention is without being limited thereto.
Claims (10)
1. a kind of experimental rig for light steel frame bean column node Experiment of Mechanical Behavior, it is characterised in that: the device includes dress
Bottom set plate (1), top plate, lower bayonet slot (2), upper card slot (3), fastening bolt (4), upper cover plate (5), bottom plate elongated slot (6), side plate (7),
Clamping plate (8), toggle (9), beam-column connection test specimen (10), mechanics universal testing machine (11)；
Beam-column connection test specimen (10) is T shape test specimen, and the upper and lower ends of test specimen are respectively the structure of column, and horizontal direction is beam
Structure；
Mechanics universal testing machine (11) is bolted with device bottom plate (1), and side plate (7) is welded on device bottom plate (1) vertically
Two sides, the upper and lower ends of beam-column connection test specimen (10) pass through that top plate, device bottom plate (1) are fixed, and lower bayonet slot (2) is set respectively
It sets on device bottom plate (1), upper card slot (3) is arranged on top plate, and lower bayonet slot (2) is corresponding with the position of upper card slot (3)；Beam column
The upper and lower ends of connecting node test specimen (10) are respectively charged into card slot (3), lower bayonet slot (2), beam-column connection test specimen (10)
It is fastened with lower bayonet slot (2), upper card slot (3) by fastening bolt (4)；Bottom plate elongated slot (6) is arranged on device bottom plate (1), is used for
Change loading Position；
Clamping plate (8) is arranged at beam-column connection test specimen (10) beam-ends load, and mechanics universal testing machine (11) passes through toggle (9)
It is connect with clamping plate (8).
2. a kind of experimental rig for light steel frame bean column node Experiment of Mechanical Behavior according to claim 1, special
Sign is: the bottom of experimental rig is arranged in fixed device bottom plate (1) with the assembly of mechanics universal testing machine, is entire test dress
Set the critical component connecting with mechanics universal testing machine (11)；Device bottom plate (1) is made by Q235 steel or Q345 steel, with a thickness of
25mm~35mm is fixed on the load bottom plate of mechanics universal testing machine (11) by the bolt that 5~6 diameters are 24mm~30mm
On, load bottom plate thickness 35mm~40mm of mechanics universal testing machine has biggish rigidity, can bear biggish vertical load,
The device bottom plate being connected thereto is side plate (7) and beam-column connection test specimen (10) provides reliable bearing.
3. a kind of experimental rig for light steel frame bean column node Experiment of Mechanical Behavior according to claim 1, special
Sign is: lower bayonet slot (2) shape and the column section phase of the lower end of beam-column connection test specimen (10) of assembly light steel frame beam column
Together, the installation for the ease of beam-column connection test specimen (10) is fixed, and the size of lower bayonet slot (2) is greater than assembly light steel frame beam column
Lower end column cross-section size, lower bayonet slot (2) respectively has more 1mm along four sides outward；The depth of lower bayonet slot (2) is than device bottom plate (1)
The small 10mm of thickness.
4. a kind of experimental rig for light steel frame bean column node Experiment of Mechanical Behavior according to claim 1, special
Sign is: upper card slot (3) shape is identical as end section on the column of beam-column connection test specimen, for the ease of beam-column connection examination
Part (10) tilts pierce into card slot (3) from below, and the size of upper card slot (3) is than assembly light steel frame beam column upper end sectional dimension
Greatly, four sides of upper card slot (3) respectively have more 10mm~15mm outward；The depth of upper card slot (3) is identical as the depth of lower bayonet slot (2),
Guarantee the upper end of beam-column connection test specimen, lower end all in hinged state.
5. a kind of experimental rig for light steel frame bean column node Experiment of Mechanical Behavior according to claim 1, special
Sign is: the fastening bolt (4) one of fixed light steel frame beam column shares eight, at lower bayonet slot (2) there are four, at upper card slot (3)
There are four, fastening bolt (4) is to ensure that the key measure of lower bayonet slot clamping beam-column connection test specimen (10)；Since machinery adds
When tooling is set, beam-column connection test specimen (10), upper card slot (3), the gap between lower bayonet slot (2) are difficult to avoid that, and these
There is horizontal displacement in the styletable up and down that gap will cause beam-column connection test specimen (10) in load, then influences beam end displacement
Reading；Beam-column connection test specimen (10) is fitted into card slot (3), in lower bayonet slot (2) after, cover upper cover plate (5), bolt enters
It is tightened after the fastening bolt (4) of light steel frame beam column, it is ensured that in load, upper and lower styletable is in the state clamped.
6. a kind of experimental rig for light steel frame bean column node Experiment of Mechanical Behavior according to claim 1, special
Sign is: the upper cover plate (5) of fixed light steel frame beam column is to ensure that axis pressure is fixed and applied in beam-column connection test specimen upper end
Critical component；Due to the size of upper card slot (3) side more every than the column upper end of beam-column connection test specimen (10) have more 10mm~
15mm has a rectangular box shape protrusion in the bottom of upper cover plate (5), just occupies between 10mm~15mm that this has more
Gap is covered in upper cover plate (5), and after upper cover plate and upper card slot (3) are connected and fixed with four bolts, then with four fastening bolts
(4) it tightens, the upper end for allowing for beam-column connection test specimen is limited horizontal displacement completely, and not limit flexion, is met
Theoretical hinged mechanical model, reaches the requirement of bean column node Experiment of Mechanical Behavior；It can also be installed above upper cover plate (5) small
Type jack or brute spring apply axis pressure for styletable, simulate the stress of light steel frame beam column at work completely.
7. a kind of experimental rig for light steel frame bean column node Experiment of Mechanical Behavior according to claim 1, special
Sign is: when for changing the bottom plate elongated slot (6) of loading Position being beam-column connection Experiment of Mechanical Behavior, changing load(ing) point
Key Design；According to test objective, beam-column connection test specimen (10) is when needing to study node area flexural property, load(ing) point
It needing close to beam end, when if necessary to study node area ultimate shear capacity, load(ing) point needs to be moved near bean column node root,
Except node area, since mechanics universal testing machine (11) can not move, and beam-column connection test specimen (10) is fixed in
On experimental rig, entire experimental rig can only be moved to change the position of load(ing) point, this movement will lean on to add
The bottom plate elongated slot (6) of loading point position is realized, between back-off assembly bottom plate (1) and mechanics universal testing machine (11) load bottom plate
Bolt makes whole device slide into design position, then tightens bolt, that is, realizes the change of loading Position.
8. a kind of experimental rig for light steel frame bean column node Experiment of Mechanical Behavior according to claim 1, special
Sign is: attachment device bottom plate (1) and the side plate (7) of top plate play a key role the globality of experimental rig；Under side plate
Portion and device bottom plate (1) welding, the top plate welding where side plate (7) top and upper card slot (3), side plate (7) will have enough rigid
Degree can guarantee the relative position of lower bayonet slot (2) and upper card slot (3), while side plate (7) will have enough tensile capacity, beam-ends by
When to larger pulling force, this pulling force can be transmitted to top plate by beam-column connection test specimen (10), and top plate needs side plate to haul ability
Guarantee test is normally carried out；The thickness of side plate (7) selects the value between 15mm~25mm according to the size of vertical load.
9. a kind of experimental rig for light steel frame bean column node Experiment of Mechanical Behavior according to claim 1, special
Sign is: clamping plate (8) effect of beam-ends load is fixed beam-ends, the load of load end is transmitted to beam-ends, therefore connect in beam column
Connecing specimen joints (10) installation the upper and lower of rear plate (8) in place must be fixed with high-strength bolt；Due to being divided into drawing when beam-ends load
Power and pressure, clamping plate (8) are divided into two operating conditions: downwards when load, upper clamp plate directly acts on beam-ends top surface, lower clamp plate it is high-strength
Screw rod and lower clamp plate stress are little；Upwards when load, lower clamp plate holds curved scissors effect, and four high-strength bolts bear axial tension；
The thickness of upper and lower two clamping plates (8) is in 20~25mm, and four high-strength bolt diameters are in 14mm~20mm；
The toggle (9) of load end is the critical component for vertical load being transmitted to from load crossbeam beam-ends；Toggle (9) is loading
When there are two operating condition: downwards when load, upper clamp plate (8) is close to always with beam-ends upper surface and parallel, the rotation of toggle (9) herein
Angle slowly becomes larger also with the increase of beam-ends vertical displacement；Upwards when load, toggle (9) bears biggish pulling force, therefore answers
This is constantly in exceptionally straight state, i.e., no corner；Toggle (9) is dimensioned to guarantee that toggle net area and the axis of centre can be held
By the maximum pull that can apply of load crossbeam and ensure not generate obvious deformation；
Beam-column connection test specimen (10) is designed according to test objective；The light steel column of the test specimen uses square section, institute
The light girder steel of test specimen is stated using square section or rectangular section, I-shaped cross-section, if using I-shaped cross-section, to make to try
Part keeps stablizing in load, needs the web height at the node area of I-shaped cross-section, load(ing) point that rectangle ribbed stiffener is arranged.
10. a kind of experimental rig for light steel frame bean column node Experiment of Mechanical Behavior according to claim 1, special
Sign is: the installation process of the device is as follows,
Step 1: the steel of two block assembly bottom plates, two blocks of side plates, one piece of top plate, one piece of backboard is cut into according to design size respectively
Plate, required precision control the upper card slot for processing top plate on lathe in ± 0.5mm, after cutting；It mills out on device bottom plate
Lower bayonet slot and five bottom plate elongated slots；The vee gutter being cut on two side plates；
Step 2: each block of steel plate above-mentioned is welded in the relative position according to design, two block assembly bottom plates are under, and two blocks of side plates are in
Between, for top plate upper, backboard has both the effect of ribbed stiffener between device bottom plate, top plate and side plate；To ensure weld seam when welding
Quality is not less than B grades, and each weld width and length will meet the requirement of existing " Code for design of steel structures "；Top plate and side plate, dress
Bottom set plate and side plate will add small-sized ribbed stiffener, thickness 10mm, and high and long size is no more than 50mm；
Step 3: device is fixed on adding for mechanics universal testing machine with the bolt of 24~30mm first according to design scheme
On load floor, front-rear position is adjusted；Then force snesor is installed on the load crossbeam of mechanics universal testing machine, connection is erected
Axis, toggle, upper clamp plate；
Step 4: installation beam-column connection test specimen, when installation, first tilt test specimen, by the column upper end of test specimen from upper card slot under
It is pierced by and, is lifted test specimen then up, fallen into the lower bayonet slot on bottom plate to newel post bottom under test specimen, then tighten in lower bayonet slot
Eight fastening bolts, upper cover plate is aligned with upper card slot, covers upper cover plate, set plus axis pressure equipment, will be upper with bolt
Cover board is fixed on top plate；
Step 5: the various lines of connection strain transducer, displacement sensor, force snesor；With upper clamp plate and lower clamp plate by beam column
Connecting node test specimen clamps；Various sensors are debugged, load and data acquisition are started.
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