CN202002795U - Carrying force nondestructive detection device for overpass railing - Google Patents
Carrying force nondestructive detection device for overpass railing Download PDFInfo
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- CN202002795U CN202002795U CN201120042635XU CN201120042635U CN202002795U CN 202002795 U CN202002795 U CN 202002795U CN 201120042635X U CN201120042635X U CN 201120042635XU CN 201120042635 U CN201120042635 U CN 201120042635U CN 202002795 U CN202002795 U CN 202002795U
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Abstract
The utility model relates to a carrying force nondestructive detection device for an overpass railing, which comprises a machine frame part, a machine frame fixing part and a detection part, wherein the machine frame part comprises a machine frame base, a machine frame vertical supporter, a machine frame inclined supporter and an oil cylinder back seat, the oil cylinder back seat is fixed on the top of the machine fame vertical supporter, the machine frame fixing part comprises a front support frame and a back support frame penetrating through the machine frame base from top to bottom, and the detection part comprises a hydraulic system, a displacement sensor, an oil cylinder, a pressure sensor, a multi-path signal collection card and a computer. The carrying force nondestructive detection device can ensure that the carrying force detection operation of the overpass railing can be conveniently and fast completed, whether the allowed carrying force requirements of national relevant standards are reached not or are detected and analyzed from the aspects of integral stress and local destabilization of the railing, in addition, the construction completing railing can not be damaged in the detection process, and the carrying force nondestructive detection device can be widely applied to the carrying force detection on the overpass railing.
Description
Technical field
The utility model relates to a kind of bridge railing safety detection device, particularly a kind of day bridge railings bearing capacity pick-up unit.
Background technology
Along with the fast development of urban construction, urban transportation is flourishing day by day, for improving the traffic capacity of city road network, guarantees pedestrian's street crossing safety, convenience, and Selection of Urban Pedestrian Overpass is built increasing.Overpass is crossed the street for improving running velocity, realize human and vehicle shunting, improve congested traffic condition, improve urban walking quality etc. good traffic and social benefit are arranged, thereby the attention that more and more is subjected to urban transportation, builds relevant department.
According to the preliminary statistics, Beijing has seat surplus the overline bridge nearly 600 at present.Main in form concrete and two kinds of forms of steel case beam of dividing, the overpass guardrail is the important ingredient of overpass, plays the vital role of protection pedestrains safety.When the stream of people was crowded, it bridge protective railings effect was even more important, will cause chain reaction in case unstability takes place, and caused catastrophic effect.But owing to historical and other reason, China's standard in this respect only " Selection of Urban Pedestrian Overpass and underpass technical manual " (CJJ69-95) in 3.1.11 to save regulation railing thrust level load be 2.5
, vertical load is 1.2
, not with other mobile load superpositions.Authority data is mainly from Japanese overline bridge and underpass standard.
Because domestic related specifications has only been stipulated every meter payload values of railing, and does not have corresponding regulatory documents specified in more detail railing bearingtest and detection method at present.Just the sky bridge railings is divided into the linear meter(lin.m.) section carries out bearingtest to cause the detection method of present widespread usage, does not have ripe sky bridge railings bearing capacity nondestructive test technology and equipment at present.
Present situation sky bridge railings material is mainly the stainless-steel tube goods, as only cutting not only and can bring the difficulty of twice welding to construction for carrying out bearingtest, also will influence the railing aesthetic.Therefore and railing also is to carry out stressedly as an integral body in actual applications, is badly in need of special detection device and the detection method of a kind of sky bridge railings that can finish constructing of development under undamaged situation, from conveniently detecting, analyze aspect the whole stressed and local buckling of railing.
The utility model content
The purpose of this utility model is to provide a kind of day bridge railings bearing capacity the cannot-harm-detection device, mainly solve and currently carrying out day bridge railings bearing capacity when detecting, do not have the ripe sky bridge railings bearing capacity nondestructive test technology and the technical matters of equipment, solve the problem that must cut day bridge railings material when detecting and cause influencing the railing aesthetic simultaneously.
A kind of day bridge railings bearing capacity the cannot-harm-detection device, comprise rack section, frame fixed part and test section, it is characterized in that: described rack section comprises gantry base, the upright support of frame, frame diagonal brace and oil cylinder back seat, described oil cylinder back seat is fixed on the top of the upright support of frame, and the rear end of described gantry base has the screw mandrel perforation from top to bottom;
Frame fixed part: comprise the preceding support and the back support that run through gantry base from top to bottom, support before described by long filament bar, rotary handle, last locknut, drag hook and following locknut and combine, the hook portion of described drag hook is buckled in the outer peripheral bottom of pontic, the shank of drag hook is through the bottom of long filament bar, and by locknut pinning down, the described locknut of going up is threaded with the long filament bar, and be tightened in gantry base above, rotary handle is fixed on the upper end of long filament bar;
Test section: comprise hydraulic system, displacement transducer, oil cylinder, pressure transducer, multiplexed signal sampling card and computing machine, the cylinder barrel rear end and the oil cylinder back seat of described oil cylinder are fixed, the cylinder rod front end of oil cylinder is connected with the rear end of pressure transducer, the front end of pressure transducer is connected with the back of push pedal, the canned paragraph of described displacement transducer is connected with the cylinder barrel of oil cylinder, the mobile terminal of displacement transducer is connected with cylinder rod by web member, the signal output part of described displacement transducer and pressure transducer is connected with the signal input interface of computing machine by the multiplexed signal sampling card, and described oil cylinder and pressure transducer are more than two covers.
It is telescopic tube that described back is supported, or the short screw mandrel of liftable, or form with the base plate that its lower end is connected by short screw mandrel, upper end handle, described short screw mandrel passes the screw mandrel perforation of gantry base rear end, screw thread is arranged or be connected with hold-down nut in the screw mandrel perforation, described backplanes support is on pontic;
Described displacement transducer is symmetrically arranged in the oil cylinder of central authorities.
The upright support of described frame is vertical columns, telescopic tube or vertical frame.
Described gantry base is flat board or plane framework.
Compared with prior art the utlity model has following characteristics and beneficial effect:
The utility model detects, analyzes with aspect local buckling from bridge railings integral body in sky is stressed, and the device and the technology of special detection is provided, and can finish day bridge railings bearing capacity easily and efficiently and detect an operation.Utilize the hook portion of drag hook to be buckled in the outward flange bottom of pontic, do not need to weld backrest in addition, simplify the structure yet, reduced the length of device, the railing of finishing constructing in testing process can not damage, and can be widely used in day bridge railings bearing capacity and detect.
Description of drawings
The utility model is described in more detail below in conjunction with accompanying drawing.
Fig. 1 is a day bridge railings bearing capacity pick-up unit structural representation.
Fig. 2 is the machine frame fixture synoptic diagram.
Fig. 3 is day plan structure synoptic diagram of bridge railings bearing capacity pick-up unit.
Reference numeral: 1-upper end handle, 2-hydraulic system, 3-frame diagonal brace, 4-oil cylinder back seat, 5-displacement transducer, 6-oil cylinder, the 7-pressure transducer, 8-multiplexed signal sampling card, 9-computing machine, 10-railing, 11-long filament bar, 12-pontic, 13-rotary handle, the last locknut of 14-, locknut, the short screw mandrel of 17-, 18-base plate, 19-gantry base, the upright support of 20-frame, 21-push pedal, 22-web member, 23-hold-down nut under 15-drag hook, the 16-.
Embodiment
Embodiment is referring to Fig. 1, Fig. 2, shown in Figure 3, a kind of day bridge railings bearing capacity the cannot-harm-detection device, comprise rack section, frame fixed part and test section, described rack section comprises gantry base 19, the upright support 20 of frame, frame diagonal brace 3 and oil cylinder back seat 4, described oil cylinder back seat 4 is fixed on the top of the upright support 20 of frame, the rear end of described gantry base 19 has the screw mandrel perforation from top to bottom, and this perforation place is connected with hold-down nut 23.
Frame fixed part: comprise the preceding support and the back support that run through gantry base 19 from top to bottom, described back is supported the base plate 18 that is connected with its lower end by short screw mandrel 17, upper end handle 1 and is formed, described short screw mandrel 17 passes hold-down nut 23, described base plate 18 be supported on pontic 12 above; Support before described by long filament bar 11, rotary handle 13, last locknut 14, drag hook 15 and following locknut 16 and combine, the hook portion of described drag hook 15 is buckled in the outer peripheral bottom of pontic 12, the shank of drag hook 15 is through the bottom of long filament bar 11, and by locknut 16 pinnings down, the described locknut 14 of going up is threaded with long filament bar 11, and be tightened in gantry base 19 above, rotary handle 13 is fixed on the upper end of long filament bar 11; Test section: comprise hydraulic system 2, displacement transducer 5, oil cylinder 6, pressure transducer 7, multiplexed signal sampling card 8 and computing machine 9, the cylinder barrel rear end of described oil cylinder 6 and oil cylinder back seat 4 are fixing, the cylinder rod front end of oil cylinder 6 is connected with the rear end of pressure transducer 7, the front end of pressure transducer 7 is connected with the back of push pedal 21, the canned paragraph of described displacement transducer is connected with the cylinder barrel of oil cylinder 6, the mobile terminal of displacement transducer is connected with cylinder rod by web member 22, and the signal output part of described displacement transducer 5 and pressure transducer 7 is connected with the signal input interface of computing machine by multiplexed signal sampling card 8.
Described oil cylinder 6 and pressure transducer 7 are five covers, and displacement transducer 5 is two covers, are symmetrically arranged in the oil cylinder of central authorities.
The upright support 20 of described frame is vertical columns, telescopic tube or vertical frame.
Described gantry base 19 is flat board or plane framework.
A kind of day bridge railings bearing capacity lossless detection method is characterized in that: use described day bridge railings bearing capacity the cannot-harm-detection device, it is as follows that it detects step:
Step 1: at first carry out the stressing conditions analysis of the every linear meter(lin.m.) section of day bridge railings when loading, draw the numerical value such as stress, distortion, moment of flexure of every linear meter(lin.m.) section railing under the code requirement loading condition by code requirement; Then based on above-mentioned data, under same railing bearing load condition, the applied mechanics software for calculation carries out the whole stressed equivalent conversion Calculation of day bridge railings according to the not equal factor in the bridge railings position, sky that will detect, draw when the sky bridge railings is stressed as a whole, reach required loading condition under the same stress of linear meter(lin.m.) section railing;
Step 2: with sky bridge railings bearing capacity the cannot-harm-detection device installation in position, adjust oil cylinder back seat 4, the height of pre-set oil cylinder 6, angle are adjusted the position of rack section, make the push pedal 21 of oil cylinder 6 front ends withstand railing 10 top side portion; Carry out the installation of frame fixed part then, the long lead screw 11 of preceding support is passed hole on the gantry base 19 limit ends, with pack into the lower end of long lead screw 11 of the board of drag hook 15, and locknut 16 is fixed under the locking, the hook portion of drag hook 15 is hooked on the lower edge of pontic 12, to go up locknut 14 and on gantry base 19, lock, adjust the height that the back is supported, and make the frame integral level stable;
Step 3: according to the whole stressed equivalent transformation result of sky bridge railings of step 1 calculating, an application day bridge railings bearing capacity pick-up unit applies bearing capacity to the sky bridge railings and loads detection, at first provide power to oil cylinder 6 by hydraulic system 2, to railing 10 load applications, simultaneously, the displacement transducer 5 and the pressure transducer 7 that are installed on the oil cylinder 6 send data-signal to computing machine 9 by multiplexed signal sampling card 8 in real time, and are stored and handled by 9 pairs of data of computing machine;
Step 4: device is torn open and is moved, and pulls down the frame fixed part, will install displacement and being carried to next detection position or withdrawing from the arena;
Step 5: according to the stressed and deformation data that records, make load-deformation curve, analyze institute's survey railing and whether reach the requirement for bearing capacity of permission, and carry out testing result and judge.
In the described step 3 mode of load application in four stages, the first, apply certain initial load before formal the detection, unloading makes a day bridge railings be adjacent to pick-up unit then, writes down load-deformation curve in the loading procedure, show as when non-linear at this curve, reduce load increment;
The second, hierarchical loading, every grade of load should not surpass 20% of peak load, should keep enough rest times behind every grade of load, and checks whether member exists the sign of fracture, surrender, flexing;
The 3rd, loading is held lotus 1h at least after reaching the peak load of usability or load-bearing capacity check, measures a subordinate load and deformation values every 15min, till deformation values no longer obviously increases in 15min;
The 4th, load shedding measures deformation values after each grade load and unloading are all finished.
The testing result judgement comprises the evaluation of usability assay and the evaluation of load-bearing capacity assay in the described step 5.
The evaluation of described usability assay: structure or member through check should satisfy following requirement: the suitable basic linear relationship that is of load-deformation curve; Unloading back residual deformation should not surpass 20% of the maximum deformation value that records.
When above-mentioned requirements can not satisfy, can test again.Load-distortion in the check should be linear substantially for the second time, and new residual deformation must not be above 10% of the maximum distortion that records in the check for the second time.
The evaluation of described load-bearing capacity assay is under load action, and any part of structure or member buckling failure or rupture failure should not occur; Unloading back structure or deformation of members should reduce 20% at least, promptly satisfy following formula:
, wherein
Be the residual deformation amount, unit is mm,
Be total deformation, unit is mm.
When using related sky bridge railings bearing capacity lossless detection method of the utility model and pick-up unit, mainly be divided into following steps:
Step 1(calculates):
1. at first carry out the stressing conditions analysis of the every linear meter(lin.m.) section of day bridge railings when loading, draw the numerical value such as stress, distortion, moment of flexure of every linear meter(lin.m.) section railing under the code requirement loading condition by code requirement.
2. then based on above-mentioned data, under same railing bearing load condition, the applied mechanics software for calculation carries out the whole stressed equivalent conversion Calculation of day bridge railings according to the not equal factor in the bridge railings position, sky that will detect, draw when the sky bridge railings is stressed as a whole, reach required loading condition under the same stress of linear meter(lin.m.) section railing.
Step 2(pick-up unit installation in position):
1. earlier that single unit system is in place, adjust oil cylinder back seat 4, the height of pre-set oil cylinder 6, angle are adjusted frame 3 positions, make oil cylinder 6 front ends withstand railing 10 tops.
2. carry out the installation of machine frame fixture 11 then, leading screw pull bar 13 is passed hole on the frame 3 front end bars, locknut 14 is placed frame 3 front end bars top, drag hook 15 is fixed in leading screw pull bar 13 lower ends.Adjust leading screw pull bar 13, make drag hook 15 be hooked on pontic 12 lower edges, twist deadlock mother 14 at last,, and regulate to adjust and support 1, make the single unit system horizontal stable 13 tensions of leading screw pull bar.
Step 3(loads detection): according to the whole stressed equivalent transformation result of sky bridge railings that step 1 is calculated, an application day bridge railings bearing capacity pick-up unit applies bearing capacity to the sky bridge railings and detects.
1. provide power by hydraulic system 2 to oil cylinder 6, to railing 10 load applications, simultaneously, the displacement transducer 5 and the pressure transducer 7 that are installed on the oil cylinder 6 send data-signal to computing machine 9 by multiplexed signal sampling card 8 in real time, and are stored and handled by 9 pairs of data of computing machine.
2. load mode is according to the regulation in the static load check of appendix H steel construction performance in " building structure detection technique standard " (GB/T 50344-2004).
Apply certain initial load before the formal check, unloading makes member be adjacent to verifying attachment then.Write down load-deformation curve in the loading procedure,, should reduce load increment when this curve shows as when non-linear.
Hierarchical loading, every grade of load should not surpass 20% of peak load, should keep enough rest times behind every grade of load, and checks whether member deposits the sign of major rupture, surrender, flexing.
After loading reached the peak load of usability or load-bearing capacity check, Ying Chihe is 1h at least, measures a subordinate load and deformation values every 15min, till deformation values no longer obviously increases in 15min.Answer load shedding then, after each grade load and unloading are all finished, measure deformation values.
Step 4(device is shifted or withdraws from the arena):
Locknut 14 is unclamped, pull down machine frame fixture 11, regulate to adjust support 1, make device be convenient to displacement and be carried to next detection position or withdraw from the arena.
Step 5(testing result is judged): according to the stressed and deformation data that records, analyze institute's survey railing and whether reach relevant specification of country permission requirement for bearing capacity.Regulation in the testing result judgment basis " building structure detection technique standard " (GB/T 50344-2004) in the check of the static load of appendix H steel construction performance.
1. the evaluation of usability assay
Structure or member through check should satisfy following requirement: the suitable basic linear relationship that is of load-deformation curve; Unloading back residual deformation should not surpass 20% of the maximum deformation value that records.
When above-mentioned requirements can not satisfy, can test again.Load-distortion in the check should be linear substantially for the second time, and new residual deformation must not be above 10% of the maximum distortion that records in the check for the second time.
2. the evaluation of load-bearing capacity assay is under load action, and any part of structure or member buckling failure or rupture failure should not occur; Unloading back structure or deformation of members should reduce 20% at least.Promptly satisfy following formula:
Claims (5)
1. sky bridge railings bearing capacity the cannot-harm-detection device, comprise rack section, frame fixed part and test section, it is characterized in that: described rack section comprises gantry base (19), the upright support of frame (20), frame diagonal brace (3) and oil cylinder back seat (4), described oil cylinder back seat (4) is fixed on the top of the upright support of frame (20), and the rear end of described gantry base (19) has the screw mandrel perforation from top to bottom;
Frame fixed part: comprise the preceding support and the back support that run through gantry base (19) from top to bottom, support before described by long filament bar (11), rotary handle (13), last locknut (14), drag hook (15) and following locknut (16) combine, the hook portion of described drag hook (15) is buckled in the outer peripheral bottom of pontic (12), the shank of drag hook (15) is through the bottom of long filament bar (11), and by locknut (16) pinning down, the described locknut (14) of going up is threaded with long filament bar (11), and be tightened in gantry base (19) above, rotary handle (13) is fixed on the upper end of long filament bar (11);
Test section: comprise hydraulic system (2), displacement transducer (5), oil cylinder (6), pressure transducer (7), multiplexed signal sampling card (8) and computing machine (9), the cylinder barrel rear end of described oil cylinder (6) and oil cylinder back seat (4) are fixing, the cylinder rod front end of oil cylinder (6) is connected with the rear end of pressure transducer (7), the front end of pressure transducer (7) is connected with the back of push pedal (21), the canned paragraph of described displacement transducer is connected with the cylinder barrel of oil cylinder (6), the mobile terminal of displacement transducer is connected with cylinder rod by web member (22), the signal output part of described displacement transducer (5) and pressure transducer (7) is connected with the signal input interface of computing machine by multiplexed signal sampling card (8), and described oil cylinder (6) and pressure transducer (7) are more than two covers.
2. according to claim 1 day bridge railings bearing capacity the cannot-harm-detection device, it is characterized in that: it is telescopic tube that described back is supported, or the short screw mandrel of liftable, or form by the base plate (18) that short screw mandrel (17), upper end handle (1) are connected with its lower end, described short screw mandrel (17) passes the screw mandrel perforation of gantry base (19) rear end, screw thread is arranged or is connected with hold-down nut (23) in the screw mandrel perforation, described base plate (18) be supported on pontic (12) above.
3. according to claim 2 day bridge railings bearing capacity the cannot-harm-detection device, it is characterized in that: described displacement transducer (5) is symmetrically arranged in the oil cylinder of central authorities.
4. according to claim 3 day bridge railings bearing capacity the cannot-harm-detection device, it is characterized in that: the upright support of described frame (20) is vertical columns, telescopic tube or vertical frame.
5. according to claim 3 day bridge railings bearing capacity the cannot-harm-detection device, it is characterized in that: described gantry base (19) is flat board or plane framework.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120042635XU CN202002795U (en) | 2011-02-21 | 2011-02-21 | Carrying force nondestructive detection device for overpass railing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120042635XU CN202002795U (en) | 2011-02-21 | 2011-02-21 | Carrying force nondestructive detection device for overpass railing |
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| Publication Number | Publication Date |
|---|---|
| CN202002795U true CN202002795U (en) | 2011-10-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120042635XU Expired - Lifetime CN202002795U (en) | 2011-02-21 | 2011-02-21 | Carrying force nondestructive detection device for overpass railing |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102175443A (en) * | 2011-02-21 | 2011-09-07 | 北京市市政工程研究院 | Device and method for non-destructively testing capacity of overbridge railings |
| CN102853860A (en) * | 2012-08-10 | 2013-01-02 | 江阴沐祥节能装饰工程有限公司 | Lifting detector |
| CN106706284A (en) * | 2016-11-23 | 2017-05-24 | 上海宇航系统工程研究所 | Simplified verification method for bearing capacity of support type multi-sphere storage box |
-
2011
- 2011-02-21 CN CN201120042635XU patent/CN202002795U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102175443A (en) * | 2011-02-21 | 2011-09-07 | 北京市市政工程研究院 | Device and method for non-destructively testing capacity of overbridge railings |
| CN102175443B (en) * | 2011-02-21 | 2012-07-04 | 北京市市政工程研究院 | Device and method for non-destructively testing capacity of overbridge railings |
| CN102853860A (en) * | 2012-08-10 | 2013-01-02 | 江阴沐祥节能装饰工程有限公司 | Lifting detector |
| CN106706284A (en) * | 2016-11-23 | 2017-05-24 | 上海宇航系统工程研究所 | Simplified verification method for bearing capacity of support type multi-sphere storage box |
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| GR01 | Patent grant | ||
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Granted publication date: 20111005 |
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| CX01 | Expiry of patent term |