CN101915648B - Device for testing low cycle repetitive load - Google Patents
Device for testing low cycle repetitive load Download PDFInfo
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- CN101915648B CN101915648B CN2010102286113A CN201010228611A CN101915648B CN 101915648 B CN101915648 B CN 101915648B CN 2010102286113 A CN2010102286113 A CN 2010102286113A CN 201010228611 A CN201010228611 A CN 201010228611A CN 101915648 B CN101915648 B CN 101915648B
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Abstract
The invention discloses a device for testing a low cycle repetitive load. A bottom beam (1) of the device is fixed with a test slot way through bolt holes and bolts on compression legs at both ends of the bottom beam. A lower outer frame beam (2) is fixed with the bottom beam (1) by a bolt. Outer frame beams (2) and (3) are articulated with outer frame columns (4) and (5) through hinge pins, and a test piece (9) is placed in a loader. A roller shaft connector (6) is connected between a outer frame and an actuating head, and the deformed outer frame can shift vertically relative to the actuating head. A vertical loader transfers a vertical jack to an inner test piece so as to the simulation of different axial-load ratios. The device has the advantages of avoiding large bottom beam in the traditional low cycle repetitive load test and reusing the loader, thereby saving the test cost. The whole device is hinged at the corner, and since the roller shaft connecter is additionally arranged, the outer frame is capable of deforming freely. The outer frame has little impact on the test, therefore, an actuator load can be fully applied on inner members.
Description
Technical field
The present invention relates to a kind of device for testing low cycle repetitive load, belong to building structure energy-dissipating and shock-absorbing technology.
Background technology
Pseudo-static experimental claims the low cycle repetitive load test again, be meant structure or structural elements are applied the repeatedly static load of reciprocation cycle effect, make test specimen stressed to a kind of test method of destroying, loading characteristic and the deformation characteristics of structure in double vibrations during in order to simulated earthquake from beginning.Can set up the restoring force characteristic of structure under geological process by pseudo-static experimental, weigh the energy dissipation capacity of structure, the failure mechanism of research structure member is for the construction measure that improves existing structural aseismatic design and improvement structural design provides foundation.Pseudo-static experimental is present research structure or structural elements one of most widely used method when geological process lower stress and deformation performance.
In traditional low cycle repetitive load test, test specimen need be fixed on by huge bottom girder on the conduit to realize the fixed of bottom.The bottom girder irrelevant with the test component performance often consumes wide variety of materials, being made 1/2 ratio wallboard model with Beijing Jiaotong University is example, making concrete and the reinforcing bar amount that bottom girder consumed is the twice of wallboard test specimen itself, and bottom girder can not reuse, not only waste of manpower, material resources, increase experimentation cost, and the weight that has increased whole test specimen greatly causes difficult.In addition, when to in-filled block or fill masonry when carrying out anti-seismic performance research, because the fragility of test specimen itself, one direction loads the cracking back and is difficult to realize reciprocal loading during pseudo-static test, and the stress performance of filling material itself is tested very difficult realization.
Summary of the invention
Shortcoming at existing in traditional low cycle repetitive load test provides a kind of device for testing low cycle repetitive load.This device is realized fixing to inner test piece, the slippage and the rotation of restriction test specimen by bigger housing beam of rigidity and exterior frame column; The housing beam is connected by bearing pin in the bight with the exterior frame column post simultaneously, and is connected with action head by the roll shaft connector, and whole device can planar freely deform, and housing is not born load action, and the load of action head all puts on inner test piece; Whole device connects by bolt, and is for convenience detach, and can realize the adjustment to plant bulk, makes this device can be applicable to the test specimen of different size.
The technical solution that adopts is so for achieving the above object:
A kind of device for testing low cycle repetitive load, this test unit comprise bottom girder, time housing beam, last housing beam, right outer frame post, left exterior frame column, roll shaft connector, vertical charger, inner fill plate.Connection between its each component parts:
Bottom girder is fixed by the bolt hole in its two ends leg pressing and foot bolt and test conduit;
Following housing beam and bottom girder pass through housing beam bolt hole and bottom girder roof bolt hole bolt down;
Right outer frame post two ends are inserted down the housing beam respectively, gone up between the space of first and second channel-section steel of housing beam, and are hinged by bearing pin; Exterior frame column two ends, a left side are inserted down the housing beam respectively, gone up between the space of first and second channel-section steel of housing beam, and are hinged by bearing pin;
One end of roll shaft connector is connected and fixed by connecting rod and baffle plate and last housing beam, and the other end of roll shaft connector is connected with action head;
The upper component of vertical charger strides across first channel-section steel and second channel-section steel of housing beam, ties by bolt hole on the overhanging edge of a wing and bottom load plate; The upper end of vertical charger is connected with vertical lifting jack, and the lower end is applied to load on the test specimen.
Inner fill plate 8 is connected the exterior frame column inboard by bolt, realizes the fine setting to inside dimension.
The present invention compared with prior art has following beneficial effect:
1. whole device connects with bearing pin in the bight, horizontal direction can freely deform, can ignore the stressed of device in experimentation, horizontal loading all acts on the test specimen, farthest the force-bearing situation of simulated interior test specimen under horizontal low cycle repetitive load effect.
2. in traditional low cycle repetitive load test, the height of action head can not reduce, roll shaft connector among the present invention can be implemented in when transmitting horizontal loading and guarantee that whole device housing freely deforms, make the relative action head generation of housing vertical displacement, thereby reduce of the influence of constraint housing to greatest extent, the precision of warranty test to test.
3. use this device to test, can omit huge bottom girder in the test of traditional low cycle repetitive load, and package unit can reuse, greatly reduce the cost of manufacture of test specimen, save testing expenses.
4. the housing beam and column is processed as the same cross-sectional size, the selection by housing beam end pin-and-hole simultaneously and add inner fill plate and realize fine setting to plant bulk making device can be applicable to the test specimen of different size.
5. this device is made simple, easy to use.Whole device all adopts bolt to connect, easy assembly and disassembly, and the time spent can not disassemble it, does not take up room, and conveniently deposits.
Description of drawings
Fig. 1 is a kind of device for testing low cycle repetitive load overall schematic.
Fig. 2 is last housing beam and roll shaft connector connection diagram.
Fig. 3 is the bottom girder front elevation.
Fig. 4 is the bottom girder vertical view.
Fig. 5 is the bottom girder side view.
Fig. 6 is the 1-1 sectional view of Fig. 4.
Fig. 7 is a housing beam front elevation.
Fig. 8 is a housing beam vertical view.
Fig. 9 is a housing beam side view.
Figure 10 is the 2-2 sectional view of Fig. 7.
Figure 11 is the exterior frame column front elevation.
Figure 12 is the exterior frame column side view.
Figure 13 is the 3-3 section intention of Figure 11.
Figure 14 is the 4-4 section of Figure 11.
Figure 15 is a roll shaft connector front elevation.
Figure 16 is a roll shaft connector vertical view.
Figure 17 is a roll shaft connector left view.
Figure 18 is a roll shaft connector right side view.
Figure 19 is the 6-6 sectional view of Figure 15.
Figure 20 is the 5-5 sectional view of Figure 15.
Figure 21 is the 7-7 sectional view of Figure 16.
Figure 22 is vertical charger front elevation.
Figure 23 is vertical charger vertical view.
Figure 24 is vertical charger side view.
Figure 25 is the fill plate structural representation.
Figure 26 is a device for testing low cycle repetitive load original state synoptic diagram.
Figure 27 is the device for testing low cycle repetitive load working state schematic representation.
Embodiment
Below with reference to accompanying drawing inventive embodiment is described in further detail.
A kind of device for testing low cycle repetitive load is as Fig. 1.This test unit comprises bottom girder 1, time housing beam 2, last housing beam 3, right outer frame post 4, left exterior frame column 5, roll shaft connector 6, vertical charger 7, inner fill plate 8.Connection between its each component parts:
Following housing beam 2 passes through housing beam bolt hole b6 and bottom girder roof bolt hole a3 bolt down with bottom girder 1, sees Fig. 4,8.
Right outer frame post 4 two ends are inserted down housing beam 2 respectively, gone up between the space of housing beam 3 first and second channel-section steels, and are hinged by bearing pin; Exterior frame column 5 two ends, a left side are inserted down housing beam 2 respectively, gone up between the space of housing beam 3 first and second channel-section steels, and are hinged by bearing pin, see Figure 14.
One end of roll shaft connector 6 is connected and fixed with housing beam 3 by connecting rod 10 and baffle plate 11, and the other end of roll shaft connector 6 is connected with action head, sees Fig. 2.
The upper component e1 of vertical charger 7 strides across the first channel-section steel cg1 and the second channel-section steel cg2 of housing beam 3, ties by bolt hole e3 on the overhanging edge of a wing and bottom load plate e2, sees Figure 23,24; The upper end of vertical charger 7 is connected with vertical lifting jack, and the lower end is applied to load on the test specimen, sees Fig. 1.
Inner fill plate 8 is connected the exterior frame column inboard by bolt, realizes the fine setting to inside dimension.
Described bottom girder 1, as Fig. 3,4,5,6, by the welding of 40mm steel plate, the bottom girder cross section is the box with the overhanging edge of a wing, height L1=40cm, length L 2=300cm, the thick rib a1 that puts more energy into of box beam web both sides welding 40mm, ribbed stiffener spacing 30cm.The bottom girder two ends are extension L3=160cm respectively, and two leg pressings of width L5=50cm are I-shaped, respectively open the anchor (bolt) hole a2 of two diameter 60mm in the leg pressing, and bottom girder is connected with fixing conduit by foot bolt.Establish equidistant bolt hole a3 on the overhanging edge of a wing of bottom girder top board, be connected with the housing beam by bolt.Bottom girder central-web spacing L4=30cm, end face width L6=50cm, its cross section such as Fig. 6, the edge of a wing, middle part end face open diameter 20mm bolt hole a3, and keyhole spacing 30cm is used for passing through bolt with the top charger.
Test specimen 9 is placed on and adds in the cutting device.
Described housing beam 2 down, its length L 7=200cm, height L8=30cm, width L9=34cm, as Fig. 7,8,9,10, it comprises first and second channel-section steel (cg1, cg2) by the welding of 20mm steel plate, its height L8=300mm, flange width L11=150mm.Weld the b1 that puts more energy into together every L10=200mm on the web of two channel-section steels, ribbed stiffener thickness 20mm, open two 20mm bolt hole b2 along the web height direction between the adjacent twice ribbed stiffener, two channel-section steel web bolts hole are relative, connect by bolt b4, and the sleeve pipe b5 of long 40mm is housed on the screw rod between the channel-section steel, to guarantee channel-section steel web spacing 40mm, be used to guarantee two spaces between the U-steel, bolted structure between two channel-section steels is as Figure 10. Housing beam end web is opened three diameter 60mm pin shaft hole b3 respectively, and pitch of holes 30cm is used for the adjustment to plant bulk, realizes the adjustment of charger size by the selection of diverse location pin shaft hole; The equidistant bolt hole b6 of 20mm diameter is opened on the edge of a wing, channel-section steel bottom surface, and the keyhole position is corresponding with bottom girder roof bolt hole a3.
The structure of last housing beam 3 and size are identical with following housing beam 2.
The height L12=180cm of described right outer frame post 4, as Figure 11,12,13, it comprises: the 3rd, the 4th channel-section steel (cg3, cg4) and the bearing pin plate xb that are welded by the 20mm steel plate, connect by bolt between the each several part, channel-section steel overall height L14=122cm, the channel cross-section size is identical with the used channel-section steel of housing beam.Weld ribbed stiffener c1 one every 200mm on the web, open two 20mm bolt hole c2 between the adjacent twice ribbed stiffener on the web, connect bolted structure such as Figure 10 between the channel-section steel between two parts channel-section steel by bolt.
Bearing pin plate xb is processed into by the 40mm steel plate, length L 13=53cm, width L8=30cm, one end is opened the pin shaft hole c3 of 70mm and is processed into circular-arc on the top, open bolt hole c4 on the bearing pin plate with the corresponding diameter 20mm in web bolt hole position, bearing pin plate xb places between two channel-section steels, is connected with channel-section steel by bolt c5, and bolt is connected as Figure 13 between bearing pin plate and the channel-section steel.The bearing pin plate xb at right outer frame post two ends is inserted between the housing beam channel-section steel and is connected with the housing beam by bearing pin c6, and bearing pin connects structure as Figure 14; Open the bolt hole c7 of diameter 20mm on the inboard edge of a wing of right outer frame post 4, spacing 30cm is used for the inner fill plate of bolt.
The structure of left side exterior frame column 5 and size and connected mode are identical with right outer frame post 4.
Described roll shaft connector 6 is processed by the 40mm steel plate, and as Figure 15-21, it comprises: with load housing connecting elements d1, with action head connecting elements d2.Be processed as tubular with loading housing connecting elements (d1), its cross section is c-shaped, opens tie rod holes d4 respectively on the limb backlimb edge, be connected with the housing beam by connecting rod, the height L15=500mm that is connected side d1 with the housing beam, width L18=400mm, overhanging flange width L21=100mm, height L22=300mm, on open the tie rod holes d4 of 50mm, its overall width L16=600mm is with the length L 19=420mm of action head connecting elements d2, end plate size L20=400mm, perforate d5 and be connected on it with action head; See Fig. 2.Be worker's shape with action head connecting elements d2 cross section, a side wing edge wraps in and loads in the housing connecting elements d1, connects by roll shaft d3 between two parts, opens four bolt hole d5 on the steel plate of the opposite side edge of a wing, is connected with action head by bolt; Relative vertical displacement can take place between two parts member d1 and the d2 in whole device when transmitting horizontal force, thereby guarantees to load the Free Transform of housing.
Inner roll shaft d3 diameter 30mm is placed in the conduit that processes, and adds the friction resistance between lubricating oil minimizing roll shaft and the device in the conduit, and Figure 19-21 is seen in its internal structure.Relative vertical displacement can take place between two parts member d1 and the d2 in whole device when transmitting horizontal force, thereby guarantees to load the Free Transform of housing, its principle of work such as Figure 26.
Described vertical charger 7, as Figure 22-24, comprising: upper component e1, bottom load plate e2 two parts, upper component e1 is welded into M shape by the steel plate of 40mm, its height L23=500mm, top width L26=300mm, top length L 25=600mm, outermost two block plates bottom is stretched out overhanging edge of a wing length L 27=150mm respectively, and open the bolt hole e3 of diameter 20mm thereon, the long L24=900mm of bottom load plate e2, thickness 40mm, diameter 20mm bolt hole is opened at two ends; Upper component e1 strides across first, second channel-section steel (cg1, cg2), (e1) with between the last housing beam do not contact, make vertical load can be delivered to inner test piece fully, the lower end ties by bolt hole e3 on the overhanging edge of a wing and bottom load plate e2, do not contact between whole vertical charger and the housing beam, vertical load loads steel plate by the bottom and is delivered on the test specimen, realizes the simulation to the disalignment pressure ratio.
Described inner fill plate 8 is processed by the steel plate of 5mm-20mm different-thickness, its width L26=34cm, length L 27=40cm, open diameter 20mm bolt hole f1 on the fill plate, spacing 30cm, the bolt hole c7 that opens is corresponding with the right side, the inboard institute in left exterior frame column (4, the 5) edge of a wing in its position, and fill plate is connected with exterior frame column by bolt; When inner test piece and housing size do not match, increase the fine setting that fill plate is realized the charger size by exterior frame column is inboard, simultaneously by the fill plate of selecting different size and the variation that realizes constraint condition between charger and the inner test piece at the material of filling different elastic modulus up and down between the fill plate.
Figure 26 is a device for testing low cycle repetitive load original state synoptic diagram.
Figure 27 is the device for testing low cycle repetitive load working state schematic representation.
Claims (7)
1. device for testing low cycle repetitive load, it is characterized in that this test unit comprises bottom girder (1), time housing beam (2), last housing beam (3), right outer frame post (4), left exterior frame column (5), roll shaft connector (6), vertical charger (7), inner fill plate (8); Connection between its each component parts:
Bottom girder (1) is fixed by the bolt hole (a2) in its two ends leg pressing and foot bolt and test conduit;
Following housing beam (2) passes through housing beam bolt hole (b6) and bottom girder roof bolt hole (a3) bolt down with bottom girder (1);
Right outer frame post (4) two ends are inserted down housing beam (2) respectively, gone up between the space of first and second channel-section steel of housing beam (3), and are hinged by bearing pin; Exterior frame column (5) two ends, a left side are inserted down housing beam (2) respectively, gone up between the space of first and second channel-section steel of housing beam (3), and are hinged by bearing pin;
One end of roll shaft connector (6) is connected and fixed with last housing beam (3) by connecting rod (10) and baffle plate (11), and the other end of roll shaft connector (6) is connected with action head;
The upper component (e1) of vertical charger (7) strides across housing beam (3) first channel-section steels (cg1) and second channel-section steel (cg2), ties by bolt hole on the overhanging edge of a wing (e3) and bottom load plate (e2); The upper end of vertical charger (7) is connected with vertical lifting jack, and the lower end is applied to load on the test specimen;
Inner fill plate (8) is connected the inboard of left and right sides exterior frame column by bolt, realizes the fine setting to inside dimension.
2. device for testing low cycle repetitive load according to claim 1, it is characterized in that: described bottom girder (1) is welded by steel plate, the bottom girder cross section is the box with the overhanging edge of a wing, box beam web both sides welding ribbed stiffener (a1), overhanging two leg pressings respectively of bottom girder two ends, be I-shaped, respectively open two bolts hole (a2) in the leg pressing, establish equidistant bolt hole (a3) on the overhanging edge of a wing of bottom girder top board.
3. device for testing low cycle repetitive load according to claim 1, it is characterized in that: described housing beam (2) down comprises first channel-section steel (cg1), second channel-section steel (cg2), weld ribbed stiffener (b1) on the first and second channel-section steel webs, open two bolts hole (b2) along the web height direction between the adjacent twice ribbed stiffener, channel-section steel two end webs are opened three pin shaft holes (b3) respectively, two channel-section steel web bolts hole are relative, connect by bolt (b4), sleeve pipe (b5) is housed on the screw rod between the channel-section steel; Open equidistant bolt hole (b6) on the edge of a wing, channel-section steel bottom surface, the keyhole position is corresponding with bottom girder roof bolt hole (a3); The structure of last housing beam (3) and size are identical with following housing beam (2).
4. device for testing low cycle repetitive load according to claim 1 is characterized in that: described right outer frame post (4) comprising: groove-shaped steel (cg3), the 4th channel-section steel (cg4) and two blocks of bearing pin plates (xb); The channel cross-section size is identical with the used channel-section steel of housing beam, welds ribbed stiffener (c1) on the web, opens bolt hole (c2) between the adjacent twice ribbed stiffener on the web; Two bearing pin plates (xb) are by steel plate processing, and an end expense axis hole (c3) also is processed into circular-arcly on the top, open on each bearing pin plate and the corresponding bolt hole in web bolt hole position (c4);
Two bearing pin plates (xb) place respectively between two channel-section steels, and (c5) is connected with channel-section steel by bolt, constitute right outer frame post (4), and the structure of left exterior frame column (5) and size are identical with right outer frame post (4).
5. device for testing low cycle repetitive load according to claim 1, it is characterized in that: described roll shaft connector (6) comprising: with load housing connecting elements (d1), with action head connecting elements (d2) two parts, be processed as tubular with the connecting elements (d1) that loads housing, its cross section is c-shaped, opens tie rod holes (d4) on the limb backlimb edge respectively; Be worker's shape with action head connecting elements (d2) cross section, a side wing edge wraps in the Cylinder shape constructional element of the connecting elements (d1) that loads housing, connects by roll shaft (d3) between two parts, opens four bolts hole (d5) on the opposite side square plate.
6. device for testing low cycle repetitive load according to claim 1 is characterized in that: described vertical charger (7) comprising: upper component (e1), bottom load plate (e2) two parts; Upper component (e1) is welded into M shape by steel plate, and outermost two block plates bottom is stretched out the overhanging edge of a wing respectively, and opens bolt hole (e3) thereon.
7. device for testing low cycle repetitive load according to claim 1, it is characterized in that: described inner fill plate (8) is processed by the steel plate of different-thickness, its width is consistent with the exterior frame column width, open bolt hole (f1) on the fill plate, its position is with the right side, (c7) is consistent for left exterior frame column (4,5) bolt hole that open on the edge of a wing, and fill plate is connected with exterior frame column by bolt.
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| CN2010102286113A CN101915648B (en) | 2010-07-09 | 2010-07-09 | Device for testing low cycle repetitive load |
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| CN2010102286113A CN101915648B (en) | 2010-07-09 | 2010-07-09 | Device for testing low cycle repetitive load |
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| CN102768146B (en) * | 2012-06-26 | 2014-10-08 | 武汉科技大学 | Adjustable analog simulation experimental device |
| CN103698148B (en) * | 2013-12-24 | 2015-12-30 | 中国矿业大学 | Surface deformation resistance experimental method for self-balance portal |
| CN103698219B (en) * | 2013-12-24 | 2015-11-11 | 中国矿业大学 | Self-equilibrating door frame anti-earth's surface deformation experiment device |
| CN106525471B (en) * | 2016-10-12 | 2018-11-02 | 北京工业大学 | A kind of steel frame continuous collapse dynamic test device |
| CN106596252B (en) * | 2016-11-28 | 2023-06-06 | 广东工业大学 | Side loading clamp device and implementation method thereof |
| CN106644726B (en) * | 2017-01-11 | 2023-04-11 | 广东工业大学 | Annular sample tensile test device and implementation method thereof |
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| CN108088733A (en) * | 2017-10-31 | 2018-05-29 | 青岛昊河水泥制品有限责任公司 | A kind of external pressure load loading device and test method for concrete box culvert |
| CN109406255B (en) * | 2018-10-11 | 2020-06-16 | 中国矿业大学 | Clamp for bursting test of coating fabric membrane material and bursting device |
| CN109187241B (en) * | 2018-11-05 | 2024-02-20 | 郑州大学 | Cold-formed thin-wall angle steel column low-cycle repeated test end connecting device and test device |
| CN111307390B (en) * | 2019-11-29 | 2021-11-16 | 华北理工大学 | Composite wall structure low-cycle repeated load anti-seismic performance testing device |
| CN114279667B (en) | 2022-03-07 | 2022-07-12 | 成都理工大学 | Pseudo-static anti-seismic testing device and method for wallboard joint |
| CN114964849B (en) * | 2022-05-27 | 2023-05-16 | 华南理工大学 | Test structure and test method for low-cycle reciprocating loading of frame beam |
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| JP3926912B2 (en) * | 1998-01-07 | 2007-06-06 | 横浜ゴム株式会社 | Characteristic test equipment |
| CN1385586A (en) * | 2002-06-17 | 2002-12-18 | 浙江大学 | Vacuum negative pressure static force pile testing method and device thereof |
| FR2917827B1 (en) * | 2007-06-25 | 2009-09-25 | Astrium Sas Soc Par Actions Si | DEVICE FOR TESTING STRUCTURAL PANELS. |
| CN201302522Y (en) * | 2008-10-22 | 2009-09-02 | 华侨大学 | Joint testing device for frame structure |
| CN101532931B (en) * | 2009-04-17 | 2011-07-13 | 中国科学院武汉岩土力学研究所 | Experimental method of simulating dynamic and static load and device thereof |
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