CN110940541A - Beam type structure field load simulation experiment detection device and detection method thereof - Google Patents
Beam type structure field load simulation experiment detection device and detection method thereof Download PDFInfo
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- CN110940541A CN110940541A CN201911380868.8A CN201911380868A CN110940541A CN 110940541 A CN110940541 A CN 110940541A CN 201911380868 A CN201911380868 A CN 201911380868A CN 110940541 A CN110940541 A CN 110940541A
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Abstract
The invention discloses a beam structure field load simulation experiment detection device and a detection method thereof, wherein the beam structure field load simulation experiment detection device comprises two supporting steel seats, a bearing frame, a hydraulic display table and a bearing seat, a cross beam for supporting is fixedly welded on the bearing frame, a hydraulic cylinder is fixedly installed at the top of the cross beam, a power connection port on the hydraulic cylinder is connected with the hydraulic display table through a lead, the output end of the hydraulic cylinder is fixedly connected with the top of the hydraulic table through a hydraulic rod, and first fixing holes with equal intervals are further formed in two sides of the hydraulic table. According to the invention, the hydraulic platform is provided with the plurality of first fixing holes, the mounting steel frame is provided with the second fixing holes, and one or more mounting steel frames can be simultaneously mounted at different positions on the hydraulic platform according to the data detection requirement, so that the hydraulic loader on the mounting steel frame can apply acting force to different points of the bearing steel beam, thereby detecting the pressure conditions of the different points and improving the detection effect.
Description
Technical Field
The invention relates to the field of field tests of beam structures, in particular to a field load simulation experiment detection device and a field load simulation experiment detection method for a beam structure.
Background
The beam type frame is the main form of wooden frame for ancient Chinese building. The frame features that on the top of column or on the water spreading layer on the column net, several beams are erected along the depth direction of building, the beams are shortened layer by layer, short columns or blocks are filled between layers, and small columns or triangular supports are erected in the middle of the beam on the top layer to form triangular roof truss. Purlins are erected on the small columns at the two ends of each layer of beams and in the middle of the uppermost layer of beams between adjacent roof racks; in the process of large-scale bridge construction, structural mechanical parameters and performance detection and inspection under the actual load need to be simulated on site on a beam structure, so a load simulation experiment detection device needs to be used, but the existing load simulation experiment detection device has poor detection effect in the use process, for example, hydraulic loading cannot apply loads to different stress points of a bearing beam, and the detection of data has singleness.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a device and a method for detecting a beam type structure field load simulation experiment.
In order to achieve the purpose, the invention is realized by the following technical scheme: a beam structure field load simulation experiment detection device and a detection method thereof comprise two supporting steel seats, a bearing frame, a hydraulic display platform and a bearing seat, wherein a beam for supporting is fixedly welded on the bearing frame, a hydraulic cylinder is fixedly installed at the top of the beam, a power connection port on the hydraulic cylinder is connected with the hydraulic display platform through a lead, the output end of the hydraulic cylinder is fixedly connected with the top of the hydraulic platform through a hydraulic rod, first fixing holes with equal intervals are further formed in the two sides of the hydraulic platform, the hydraulic platform can be installed between an installation steel frame in a matching manner, a second fixing hole is formed in the installation steel frame, the superposition position of the first fixing hole and the second fixing hole is fixed through a bolt, a hydraulic loader is fixedly installed at the bottom of the installation steel frame, a fixing cavity is formed in the supporting steel seat, and the fixing cavity can be installed between a weight sensor in a matching manner, the top that supports the steel seat is located fixed chamber and has seted up first fixed screw, the both sides welding of weighing sensor has fixed chimb, the fixed screw of second has been seted up on the fixed chimb, the coincidence department of the fixed screw of first fixed screw and second adopts the bolt fastening, support the steel seat and bear the adaptation installation between the seat.
Preferably, the top of the hydraulic table is fixedly connected with two positioning rods, and one end of each positioning rod penetrates through a through hole in the cross beam.
Preferably, the bearing seat comprises an upper fixing seat and a lower fixing seat, two positioning convex columns are fixedly arranged at the bottom of the lower fixing seat, second fixing edges are fixedly arranged on two sides of the lower fixing seat, and the second fixing edges are fixedly arranged on the supporting steel seat through bolts.
Preferably, the both ends of fixing base still weld down have the third fixed limit, the both ends welding of going up the fixing base has first fixed limit, the bottom welding on first fixed limit has the guide bar, and the one end of guide bar passes the through-hole on the third fixed limit, still be provided with first buffer spring on the guide bar.
Preferably, a set of fixed steel blocks is fixedly mounted at the top of the lower fixing seat, and one ends of the fixed steel blocks are rotatably mounted between the rotating shaft and the fixing rod.
Preferably, integrated into one piece between the one end of dead lever and the fixed block, and fixed connection between fixed block and the last fixing base, the bottom fixedly connected with telescopic link of fixed block, the one end of telescopic link and the top fixed connection of lower fixing base, it is provided with second buffer spring still to cooperate on the telescopic link.
Preferably, the top of going up the fixing base is provided with the detection engineering roof beam, and the top that detects the engineering roof beam is located both ends and fixedly is provided with the gag lever post, the top of gag lever post passes some through-holes of seting up on the bearing girder steel.
Preferably, the top of detecting the engineering roof beam is fixed and is provided with first structure roof beam, many support steel poles of top fixedly connected with of first structure roof beam, and support fixed connection between the top of steel pole and the second structure roof beam, the second structure roof beam is located the bottom that bears the girder steel.
Preferably, the device and the method are suitable for detecting the site load simulation experiment of the beam structure, and comprise the following steps:
s1: firstly, a weight sensor is installed in a fixed cavity arranged on a supporting steel seat in a matching way, the model of the weight sensor is YZC-9, a positioning convex column is fixedly arranged at the bottom of a lower fixed seat in a bearing seat and is arranged in a positioning hole on the supporting steel seat, so that the lower fixed seat is arranged on the weight sensor, and finally a detection engineering beam is arranged at the top of the lower fixed seat;
s2: placing a support steel beam formed by combining a first structural beam, a support steel rod and a second structural beam on the detection engineering beam, and then enabling a through hole in the bearing steel beam to penetrate through the limiting rod, so that the bearing steel beam is combined with the top of the second structural beam, and recording the numerical value of the weight sensor;
s3: two hydraulic loaders can be arranged on the hydraulic platform, a driving key of the hydraulic cylinder is started, so that the hydraulic platform moves downwards, the hydraulic loaders on the hydraulic platform apply acting force on the bearing steel beam, numerical values of hydraulic action are recorded on a display table on the hydraulic display platform, and the weight sensor can also record the detected numerical values;
s4: after hydraulic loading is used on bearing the girder steel, go up the detection engineering roof beam on the fixing base and also can receive the effort, detection engineering roof beam receives the effort after, the work of guide bar cooperation first buffer spring, and telescopic link cooperation second buffer spring work moreover for it has certain cushioning effect to go up the fixing base at the in-process that pushes down, can have fine guard action to supporting the steel seat, (the biggest bearing capacity of first buffer spring and second buffer spring is greater than the biggest loading effort of pneumatic cylinder).
Advantageous effects
The invention provides a field load simulation experiment detection device and a field load simulation experiment detection method for a beam type structure. The method has the following beneficial effects:
(1) according to the invention, the hydraulic platform is provided with the plurality of first fixing holes, the mounting steel frame is provided with the second fixing holes, and one or more mounting steel frames can be simultaneously mounted at different positions on the hydraulic platform according to the data detection requirement, so that the hydraulic loader on the mounting steel frame can apply acting force to different points of the bearing steel beam, thus the pressure conditions of the different points can be detected, and the detection effect is improved;
(2) according to the invention, the fixed cavity is arranged in the support steel seat 1, the fixed cavity and the weight sensor are installed in a matching manner, the fixed convex edge fixedly arranged on the weight sensor is fixedly installed on the support steel seat through the bolt, and the weight sensor is convenient to maintain and replace in the later period;
(3) the bearing seat comprises an upper fixing seat and a lower fixing seat, wherein first fixing edges are welded at two ends of the upper fixing seat, third fixing edges are fixedly welded at two ends of the lower fixing seat, a guide rod welded on the first fixing edges penetrates through a through hole in the third fixing edges, a first buffer spring is arranged on the guide rod in a matched mode, a telescopic rod is arranged between the top of the lower fixing seat and the bottom of the upper fixing seat, and a second buffer spring is arranged on the telescopic rod, so that the upper fixing seat has a certain buffer force after being pressed, and the supporting steel seat is well protected.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic structural view of a body carrier according to the present invention;
FIG. 3 is a schematic view of the mounting structure of the hydraulic table and the mounting steel frame of the present invention;
FIG. 4 is a schematic view of the mounting structure of the support steel base and the weight sensor according to the present invention;
FIG. 5 is a cross-sectional view of a carrier according to the present invention;
fig. 6 is a schematic structural view of a first structural beam of the present invention.
In the figure: 1. supporting a steel base; 101. a fixed cavity; 102. a first fixing screw hole; 103. positioning holes; 2. a force-bearing frame; 3. a hydraulic display table; 4. a hydraulic cylinder; 5. positioning a rod; 6. a hydraulic table; 601. a first fixing hole; 7. a bearing seat; 8. detecting an engineering beam; 9. bearing the steel beam; 10. a limiting rod; 11. a first structural beam; 12. supporting the steel rod; 13. an upper fixed seat; 1301. a first fixed edge; 1302. a guide bar; 1303. a first buffer spring; 14. a lower fixed seat; 1401. a second fixed edge; 1402. a third fixed edge; 1403. positioning the convex column; 1404. fixing the steel block; 1405. fixing the rod; 1406. a telescopic rod; 1407. a second buffer spring; 15. a weight sensor; 1501. fixing the convex edge; 1502. a second fixing screw hole; 16. installing a steel frame; 1601. a second fixing hole; 1602. a hydraulic loader; 17. a second structural beam.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-6, the present invention provides a technical solution: a beam structure field load simulation experiment detection device and a detection method thereof comprise two support steel bases 1, a bearing frame 2, a hydraulic display platform 3 and a bearing base 7, wherein a cross beam for supporting is fixedly welded on the bearing frame 2, a hydraulic cylinder 4 is fixedly installed at the top of the cross beam, a power connection port on the hydraulic cylinder 4 is connected with the hydraulic display platform 3 through a lead, the output end of the hydraulic cylinder 4 is fixedly connected with the top of a hydraulic platform 6 through a hydraulic rod, first fixing holes 601 with equal intervals are further formed in two sides of the hydraulic platform 6, the hydraulic platform 6 can be installed between an installation steel frame 16 in a matching manner, a second fixing hole 1601 is formed in the installation steel frame 16, the superposition position of the first fixing hole 601 and the second fixing hole 1601 is fixed through a bolt, a hydraulic loader 1602 is further fixedly installed at the bottom of the installation steel frame 16, a fixing cavity 101 is formed in the support steel base 1, and fixed chamber 101 can with the weight sensor 15 between the adaptation installation, the top of supporting steel base 1 is located fixed chamber 101 and has seted up first fixed screw 102, the both sides welding of weight sensor 15 has fixed chimb 1501, the fixed screw 1502 of second has been seted up on the chimb 1501, the first fixed screw 102 adopts the bolt fastening with the fixed screw 1502 of second coincidence department, support steel base 1 and bear the adaptation installation between the seat 7.
In this embodiment, two locating levers 5 of top fixedly connected with of hydraulic pressure platform 6, and the through-hole on the crossbeam is worn out to the one end of locating lever 5, and the effect of locating lever 5 for stability is better when hydraulic pressure platform 6 pushes down.
In this embodiment, the bearing seat 7 includes an upper fixing seat 13 and a lower fixing seat 14, two positioning protruding columns 1403 are fixedly arranged at the bottom of the lower fixing seat 14, second fixing edges 1401 are further fixedly arranged at two sides of the lower fixing seat 14, the second fixing edges 1401 are fixedly mounted on the supporting steel seat 1 through bolts, and the positioning protruding columns 1403 are installed in a matching manner with the positioning holes 103 on the supporting steel seat 1, so that the stability of the bearing seat 7 is improved.
In this embodiment, third fixed edges 1402 are further welded at two ends of the lower fixed seat 14, first fixed edges 1301 are welded at two ends of the upper fixed seat 13, a guide rod 1302 is welded at the bottom end of the first fixed edges 1301, a through hole in the third fixed edges 1402 is penetrated by one end of the guide rod 1302, a first buffer spring 1303 is further arranged on the guide rod 1302, the first buffer spring 1303 is arranged on the guide rod 1302, and the first buffer spring 1303 enables the bearing seat 7 to have a certain buffering performance.
In this embodiment, a set of fixed steel block 1404 is fixedly installed on the top of the lower fixing base 14, and one end of the fixed steel block 1404 is rotatably installed between the fixing rod 1405 and the rotating shaft.
In this embodiment, an end of the fixing rod 1405 and the fixing block are integrally formed, the fixing block is fixedly connected to the upper fixing base 13, the bottom of the fixing block is fixedly connected to a telescopic rod 1406, one end of the telescopic rod 1406 is fixedly connected to the top of the lower fixing base 14, and the telescopic rod 1406 is further provided with a second buffer spring 1407 in a matching manner.
In this embodiment, the top of going up fixing base 8 is provided with detection engineering roof beam 8, and the top that detects engineering roof beam 8 is located the fixed gag lever post 10 that is provided with in both ends, some through-holes of seting up on bearing girder steel 9 are passed on the top of gag lever post 10, the effect of gag lever post 10 for the phenomenon of off tracking can not appear after bearing girder steel 9 atress.
In this embodiment, the top of detecting engineering roof beam 8 is fixed and is provided with first structural beam 11, many support steel poles 12 of the top fixedly connected with of first structural beam 11, and fixed connection between the top of supporting steel pole 12 and the second structural beam 17, second structural beam 17 is located the bottom that bears girder steel 9.
In this embodiment, the device and the method for detecting the field load simulation experiment of the beam structure are suitable for the device and the method, and include the following steps:
s1: firstly, a weight sensor 15 is installed in a fixed cavity 101 arranged on a supporting steel seat 1 in a matching manner, the model of the weight sensor 15 is YZC-9, a positioning convex column 1403 is fixedly arranged at the bottom of a lower fixed seat 14 in a bearing seat 7 and is arranged in a positioning hole 103 on the supporting steel seat 1, so that the lower fixed seat 14 is arranged on the weight sensor 15, and finally a detection engineering beam 8 is arranged at the top of the lower fixed seat 14;
s2: placing a supporting steel beam formed by combining a first structural beam 11, a supporting steel rod 12 and a second structural beam 17 on the detection engineering beam 8, and then enabling a through hole in the bearing steel beam 9 to penetrate through the limiting rod 10, so that the bearing steel beam 9 is combined with the top of the second structural beam 17, and recording the numerical value of the weight sensor 15;
s3: two hydraulic loaders 1602 can be installed on the hydraulic table 6, the driving keys of the hydraulic cylinders 4 are started, so that the hydraulic table 6 moves downwards, the hydraulic loaders 1602 on the hydraulic table 6 exert acting force on the bearing steel beam 9, the numerical value of the hydraulic action is recorded on the display table on the hydraulic display table 3, and the detected numerical value is recorded by the weight sensor 15;
s4: after hydraulic loading acts on the bearing steel beam 9, the detection engineering beam 8 on the upper fixing seat 13 can also receive acting force, after the detection engineering beam 8 receives acting force, the guide rod 1302 cooperates with the first buffer spring 1303 to work, and the telescopic rod 1406 cooperates with the second buffer spring 1407 to work, so that the upper fixing seat 13 has certain buffering effect in the pressing-down process, and can have good protection effect on the supporting steel seat 1 (the maximum bearing capacity of the first buffer spring 1303 and the second buffer spring 1407 is greater than the maximum loading acting force of the hydraulic cylinder 4).
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. The utility model provides a beam type structure field load simulation experiment detection device, includes two spinal branchs and props steel seat (1), load frame (2), hydraulic pressure display platform (3) and bear seat (7), its characterized in that: the bearing frame (2) is fixedly welded with a cross beam for supporting, a hydraulic cylinder (4) is fixedly installed at the top of the cross beam, an electricity receiving port in the hydraulic cylinder (4) is connected with a hydraulic display platform (3) through a wire, the output end of the hydraulic cylinder (4) is fixedly connected with the top of a hydraulic platform (6) through a hydraulic rod, first fixing holes (601) with equal intervals are further formed in two sides of the hydraulic platform (6), the hydraulic platform (6) can be installed with an installation steel frame (16) in a matched mode, a second fixing hole (1601) is formed in the installation steel frame (16), the superposition position of the first fixing hole (601) and the second fixing hole (1601) is fixed through a bolt, a hydraulic loader (1602) is further fixedly installed at the bottom of the installation steel frame (16), a fixing cavity (101) is formed in the support steel base (1), and the fixing cavity (101) can be installed with a weight sensor (15) in an adaptive mode, the top that supports steel holder (1) is located fixed chamber (101) and has seted up first fixed screw (102), the both sides welding of weight sensor (15) has fixed chimb (1501), fixed screw (1502) of second have been seted up on fixed chimb (1501), the coincidence department of first fixed screw (102) and the fixed screw (1502) of second adopts the bolt fastening, support steel holder (1) and bear the adaptation installation between seat (7).
2. The field load simulation experiment detection device for the beam type structure as recited in claim 1, wherein: the top of the hydraulic platform (6) is fixedly connected with two positioning rods (5), and one ends of the positioning rods (5) penetrate through the through holes in the cross beam.
3. The field load simulation experiment detection device for the beam type structure as recited in claim 1, wherein: the bearing seat (7) comprises an upper fixing seat (13) and a lower fixing seat (14), two positioning convex columns (1403) are fixedly arranged at the bottom of the lower fixing seat (14), second fixing edges (1401) are further fixedly arranged on two sides of the lower fixing seat (14), and the second fixing edges (1401) are fixedly arranged on the supporting steel seat (1) through bolts.
4. The field load simulation experiment detection device for the beam type structure as recited in claim 3, wherein: the two ends of the lower fixing seat (14) are further welded with third fixing edges (1402), the two ends of the upper fixing seat (13) are welded with first fixing edges (1301), the bottom end of each first fixing edge (1301) is welded with a guide rod (1302), one end of each guide rod (1302) penetrates through a through hole in each third fixing edge (1402), and a first buffer spring (1303) is further arranged on each guide rod (1302).
5. The field load simulation experiment detection device for the beam type structure as recited in claim 4, wherein: the top fixed mounting of lower fixing base (14) has a set of fixed steel piece (1404), and the one end of fixed steel piece (1404) is passed through the pivot and is rotated the installation between dead lever (1405).
6. The field load simulation experiment detection device for the beam type structure as recited in claim 5, wherein: integrated into one piece between one end and the fixed block of dead lever (1405), and fixed connection between fixed block and last fixing base (13), the bottom fixedly connected with telescopic link (1406) of fixed block, the one end of telescopic link (1406) and the top fixed connection of lower fixing base (14), still the cooperation is provided with second buffer spring (1407) on telescopic link (1406).
7. The field load simulation experiment detection device for the beam type structure as recited in claim 1, wherein: go up the top of fixing base (8) and be provided with detection engineering roof beam (8), and the top that detects engineering roof beam (8) is located both ends and fixedly is provided with gag lever post (10), the top of gag lever post (10) is passed and is held some through-holes of seting up on girder steel (9).
8. The field load simulation experiment detection device for the beam type structure as recited in claim 1, wherein: the top of detecting engineering roof beam (8) is fixed and is provided with first structure roof beam (11), many support steel pole (12) of top fixedly connected with of first structure roof beam (11), and support fixed connection between the top of steel pole (12) and second structure roof beam (17), second structure roof beam (17) are located the bottom that bears girder steel (9).
9. A beam structure field load simulation experiment detection device and a detection method thereof are characterized in that the device and the method are suitable for the beam structure field load simulation experiment detection device and the detection method thereof, and the method comprises the following steps:
s1: firstly, a weight sensor (15) is installed in a fixed cavity (101) arranged on a supporting steel seat (1) in a matching mode, the type of the weight sensor (15) is YZC-9, a positioning convex column (1403) is fixedly arranged at the bottom of a lower fixed seat (14) in a bearing seat (7) and is arranged in a positioning hole (103) in the supporting steel seat (1), so that the lower fixed seat (14) is arranged on the weight sensor (15), and finally a detection engineering beam (8) is arranged at the top of the lower fixed seat (14);
s2: a supporting steel beam formed by combining a first structural beam (11), a supporting steel rod (12) and a second structural beam (17) is placed on a detection engineering beam (8), then a through hole in a bearing steel beam (9) penetrates through a limiting rod (10), so that the bearing steel beam (9) is combined with the top of the second structural beam (17), and the numerical value of a weight sensor (15) is recorded;
s3: two hydraulic loaders (1602) can be installed on the hydraulic table (6), a driving key of the hydraulic cylinder (4) is started, so that the hydraulic table (6) moves downwards, the hydraulic loaders (1602) on the hydraulic table (6) apply acting force to the bearing steel beam (9), numerical values of hydraulic action are recorded on a display table on the hydraulic display table (3), and the weight sensor 15 can also record detected numerical values;
s4: after hydraulic loading acts on bearing steel beam (9), detection engineering beam (8) on the upper fixing seat 13 can also receive acting force, after detection engineering beam (8) receives acting force, guide rod (1302) cooperates first buffer spring (1303) to work, and telescopic link (1406) cooperates second buffer spring (1407) to work, make upper fixing seat 13 have certain cushioning effect in the in-process of pushing down, can have fine guard action to supporting steel seat (1), (the maximum bearing capacity of first buffer spring (1303) and second buffer spring (1407) is greater than the maximum loading acting force of pneumatic cylinder (4)).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911380868.8A CN110940541A (en) | 2019-12-27 | 2019-12-27 | Beam type structure field load simulation experiment detection device and detection method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911380868.8A CN110940541A (en) | 2019-12-27 | 2019-12-27 | Beam type structure field load simulation experiment detection device and detection method thereof |
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| CN110940541A true CN110940541A (en) | 2020-03-31 |
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| CN201911380868.8A Withdrawn CN110940541A (en) | 2019-12-27 | 2019-12-27 | Beam type structure field load simulation experiment detection device and detection method thereof |
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| CN102589968B (en) * | 2012-01-19 | 2016-08-03 | 关喜才 | The on-the-spot load simulated experimental detection device of Large Scale and Continuous girder structure and detection method |
| CN106940271A (en) * | 2017-05-24 | 2017-07-11 | 中山市标致电子科技有限公司 | One kind, which is built, uses spandrel girder loading test device |
| CN207133042U (en) * | 2017-09-18 | 2018-03-23 | 济南恒乐兴科仪器有限公司 | A kind of multi-functional counter-force rack loading device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102589968B (en) * | 2012-01-19 | 2016-08-03 | 关喜才 | The on-the-spot load simulated experimental detection device of Large Scale and Continuous girder structure and detection method |
| CN103018106A (en) * | 2012-11-27 | 2013-04-03 | 中国矿业大学(北京) | Experimental platform capable of simulating confined water load and baseboard breakage relation in controllable manner |
| CN103048126A (en) * | 2012-12-12 | 2013-04-17 | 北京工业大学 | Loading device for load-unbalance experiment of static-pressure rotary table |
| CN103868792A (en) * | 2014-03-19 | 2014-06-18 | 山东交通学院 | Hydraulic bridge fatigue test loading device |
| CN203940984U (en) * | 2014-05-30 | 2014-11-12 | 长城汽车股份有限公司 | The stiffness test device of auto use chair frame assembly |
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