CN102175443B - Device and method for non-destructively testing capacity of overbridge railings - Google Patents
Device and method for non-destructively testing capacity of overbridge railings Download PDFInfo
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- CN102175443B CN102175443B CN2011100412205A CN201110041220A CN102175443B CN 102175443 B CN102175443 B CN 102175443B CN 2011100412205 A CN2011100412205 A CN 2011100412205A CN 201110041220 A CN201110041220 A CN 201110041220A CN 102175443 B CN102175443 B CN 102175443B
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Abstract
The invention discloses a device and method for non-destructively testing capacity of overbridge railings, wherein the device comprises a stander portion, a stander fixed portion and a testing portion; the stander portion comprises a stander base, a stander vertical strut, stander inclined struts, and an oil cylinder rear base; the oil cylinder rear base is fixed on the top of the stander vertical strut; the stander fixed portion comprises a front strut and a rear strut which respectively penetrate the stander base from top to bottom; and the testing portion comprises a hydraulic system, a displacement sensor, an oil cylinder, a pressure sensor, a multi-channel signal acquisition card and a computer. Due to the invention, the work of testing capacity of the overbridge railings can be conveniently and rapidly finished, whether the permitted capacity requirements of relevant national standards for overbridge railings are reached or not can be tested and analyzed from the aspects of overall stress and local unstability of the railings; in addition, no destruction is caused to the completed railings during the process of testing, therefore the device and method for non-destructively testing capacity of the overbridge railings can be widely applied to capacity testing of the overbridge railings.
Description
Technical field
The present invention relates to a kind of engineering safety pick-up unit and method, particularly a kind of day bridge railings bearing capacity pick-up unit and method.
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 receives 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 joint regulation railing thrust level load be 2.5
; Vertical load be 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 is merely and carries out bearingtest and cut and not only can bring the difficulty of twice welding to construction, also will influence the railing aesthetic.Therefore and railing also is to carry out stressedly as an integral body in practical application, is badly in need of special detection device and the detection method of a kind of sky bridge railings that can accomplish constructing of development under undamaged situation, from conveniently detecting, analyze aspect the whole stressed and local buckling of railing.
Summary of the invention
The object of the present invention is to provide a kind of day bridge railings bearing capacity the cannot-harm-detection device and method; 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: said rack section comprises gantry base, the upright support of frame, frame diagonal brace and oil cylinder back seat; Said oil cylinder back seat is fixed on the top of the upright support of frame, and the rear end of said gantry base has the screw mandrel perforation from top to bottom;
Frame fixed part: comprise the preceding support and back support that run through gantry base from top to bottom; Support by long filament bar, rotary handle, last locknut, drag hook and following locknut combining before said, the hook portion of said drag hook is buckled in the outer peripheral bottom of pontic, and the shank of drag hook is through the bottom of long filament bar; And by locknut pinning down; The said 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 said 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, and the canned paragraph of said displacement transducer is connected with the cylinder barrel of oil cylinder, and the mobile terminal of displacement transducer is connected with cylinder rod through web member; The signal output part of said displacement transducer and pressure transducer is connected with the signal input interface of computing machine through the multiplexed signal sampling card, and said oil cylinder and pressure transducer are more than two covers.
It is telescopic tube that said 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; Said 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, and said backplanes support is on pontic;
Said displacement transducer is symmetrically arranged in the oil cylinder of central authorities.
The upright support of said frame is vertical columns, telescopic tube or vertical frame.
Said gantry base is flat board or plane framework.
A kind of day bridge railings bearing capacity lossless detection method is characterized in that: use said day bridge railings bearing capacity the cannot-harm-detection device, it is following 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 in the sky when 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, adjustment oil cylinder back seat, the height of pre-set oil cylinder, angle are adjusted the position of rack section, make the push pedal of oil cylinder front end withstand the railing top side portion; Carry out the installation of frame fixed part then; The long lead screw of preceding support is passed the hole on the end of gantry base limit, with pack into the lower end of long lead screw of the board of drag hook, and locking down locknut be fixed; The hook portion of drag hook is hooked on the lower edge of pontic; To go up locknut and on gantry base, lock, the height that the adjustment back is supported makes 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 to oil cylinder power is provided, to the railing load application, simultaneously by hydraulic system; The displacement transducer pressure transducer that is installed on the oil cylinder sends data-signal to computing machine through the multiplexed signal sampling card in real time, and by computing machine data is stored and handled;
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 said 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, behind every grade of load, should keep enough rest times, and whether the inspection member exists the sign of fracture, surrender, flexing;
The 3rd, load the peak load reach usability or load-bearing capacity check after, hold lotus 1h at least, whenever measure a subordinate load and deformation values, till deformation values no longer obviously increases in 15min at a distance from 15min;
The 4th, load shedding measures deformation values after each grade load and unloading are all accomplished.
The testing result judgement comprises the evaluation of usability assay and the evaluation of load-bearing capacity assay in the said step 5.
The evaluation of said 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 basically 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 said 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
is the residual deformation amount; Unit is mm;
is total deformation, and unit is mm.
Compared with prior art the present invention has following characteristics and beneficial effect:
Bridge railings is whole from the sky stressedly detects, analyzes with aspect local buckling in the present invention, and the device and the technology of special detection is provided, and can accomplish 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, also simplify the structure, reduced the length of device, in testing process, can not damage, can be widely used in day bridge railings bearing capacity and detect the railing of accomplishing of constructing.
Description of drawings
Below in conjunction with accompanying drawing the present invention is done further detailed explanation.
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.
Fig. 4 is that day bridge railings bearing capacity pick-up unit detects the steps flow chart synoptic diagram.
Reference numeral: 1-upper end handle, 2-hydraulic system, 3-frame diagonal brace, 4-oil cylinder back seat; The 5-displacement transducer, 6-oil cylinder, 7-pressure transducer, 8-multiplexed signal sampling card; The 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, said rack section comprises the upright support of gantry base 19, frame 20, frame diagonal brace 3 and oil cylinder back seat 4, and said oil cylinder back seat 4 is fixed on the top of the upright support 20 of frame; The rear end of said 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 back support that run through gantry base 19 from top to bottom; Said 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; Said short screw mandrel 17 passes hold-down nut 23, said base plate 18 be supported on pontic 12 above; Support before said by long filament bar 11, rotary handle 13, last locknut 14, drag hook 15 and following locknut 16 and combine; The hook portion of said 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 said 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 said 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 said displacement transducer is connected with the cylinder barrel of oil cylinder 6, and the mobile terminal of displacement transducer is connected with cylinder rod through web member 22, and the signal output part of said displacement transducer 5 and pressure transducer 7 is connected with the signal input interface of computing machine through multiplexed signal sampling card 8.
Said oil cylinder 6 is five covers with pressure transducer 7, and displacement transducer 5 is two covers, is symmetrically arranged in the oil cylinder of central authorities.
The upright support 20 of said frame is vertical columns, telescopic tube or vertical frame.
Said 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 said day bridge railings bearing capacity the cannot-harm-detection device, it is following 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 in the sky when 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, adjustment 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 the 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 locking down locknut 16 be fixed; 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, the height that the adjustment back is supported makes 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 to oil cylinder 6 power is provided, to railing 10 load applications, simultaneously by hydraulic system 2; The displacement transducer 5 that is installed on the oil cylinder 6 sends data-signal to computing machine 9 through multiplexed signal sampling card 8 in real time with pressure transducer 7, and is 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 said 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, behind every grade of load, should keep enough rest times, and whether the inspection member exists the sign of fracture, surrender, flexing;
The 3rd, load the peak load reach usability or load-bearing capacity check after, hold lotus 1h at least, whenever measure a subordinate load and deformation values, till deformation values no longer obviously increases in 15min at a distance from 15min;
The 4th, load shedding measures deformation values after each grade load and unloading are all accomplished.
The testing result judgement comprises the evaluation of usability assay and the evaluation of load-bearing capacity assay in the said step 5.
The evaluation of said 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 basically 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 said 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
is the residual deformation amount; Unit is mm;
is total deformation, and unit is mm.
When using sky bridge railings bearing capacity lossless detection method involved in the present invention and pick-up unit, mainly be divided into following steps:
Step 1 (calculating):
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 in the sky when 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, adjustment 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 the 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.Adjustment leading screw pull bar 13 makes drag hook 15 be hooked on pontic 12 lower edges, and it is female 14 to twist deadlock at last, with 13 tensions of leading screw pull bar, and regulates adjustment and supports 1, makes the single unit system horizontal stable.
Step 3 (loading detects): 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. to oil cylinder 6 power is provided by hydraulic system 2; To railing 10 load applications; Simultaneously, the displacement transducer 5 that is installed on the oil cylinder 6 sends data-signal to computing machine 9 through multiplexed signal sampling card 8 in real time with pressure transducer 7, and is 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, behind every grade of load, should keep enough rest times, and whether the inspection 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, and every separated 15min measures a subordinate load and deformation values, till deformation values no longer obviously increases in 15min.Answer load shedding then, after each grade load and unloading are all accomplished, measure deformation values.
Step 4 (device is shifted or withdraws from the arena):
Locknut 14 is unclamped, pull down machine frame fixture 11, regulate adjustment and support 1, make device be convenient to displacement and be carried to next detection position or withdraw from the arena.
Step 5 (testing result judgement):, analyze institute's survey railing and whether reach relevant specification of country permission requirement for bearing capacity according to the stressed and deformation data that records.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 basically 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 (9)
1. use the method that day bridge railings bearing capacity the cannot-harm-detection device detects for one kind, it is characterized in that: it is following to detect 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 stress, distortion, the moment of flexure numerical value 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 bridge railings position, the sky difference that will detect; Draw in the sky when bridge railings is stressed as a whole, reach required loading condition under the same stress of every linear meter(lin.m.) section railing;
Step 2: with sky bridge railings bearing capacity the cannot-harm-detection device installation in position; Adjustment oil cylinder back seat (4); Height, the angle of pre-set oil cylinder (6) are adjusted the position of rack section, make the push pedal (21) of oil cylinder (6) front end 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 the hole on the end of gantry base (19) limit, with pack into the lower end of long lead screw (11) of the board of drag hook (15), and locking down locknut (16) be fixed; 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, the height that the adjustment back is supported makes 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 the cannot-harm-detection device applies bearing capacity to the sky bridge railings and loads detection; At first to oil cylinder (6) power is provided by hydraulic system (2); To railing (10) load application; 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) through multiplexed signal sampling card (8) in real time, and by computing machine (9) data are stored and handled;
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;
Said day bridge railings bearing capacity the cannot-harm-detection device; Comprise rack section, frame fixed part and test section; It is characterized in that: said rack section comprises gantry base (19), the upright support of frame (20), frame diagonal brace (3) and oil cylinder back seat (4); Said oil cylinder back seat (4) is fixed on the top of the upright support of frame (20), and the rear end of said gantry base (19) has the screw mandrel perforation from top to bottom;
Frame fixed part: comprise the preceding support and back support that run through gantry base (19) from top to bottom; Support before said by long filament bar (11), rotary handle (13), last locknut (14), drag hook (15) and following locknut (16) and combine; The hook portion of said 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 said 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 said 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 said displacement transducer is connected with the cylinder barrel of oil cylinder (6); The mobile terminal of displacement transducer is connected with cylinder rod through web member (22), and the signal output part of said displacement transducer (5) and pressure transducer (7) is connected with the signal input interface of computing machine through multiplexed signal sampling card (8), and said oil cylinder (6) and pressure transducer (7) are more than two covers.
2. the method that application according to claim 1 sky bridge railings bearing capacity the cannot-harm-detection device detects; It is characterized in that: it is telescopic tube that said 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; Said 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, said base plate (18) be supported on pontic (12) above.
3. the method that application according to claim 2 sky bridge railings bearing capacity the cannot-harm-detection device detects is characterized in that: said displacement transducer (5) is that rotational symmetry distributes with the oil cylinder of central authorities.
4. the method that application according to claim 3 sky bridge railings bearing capacity the cannot-harm-detection device detects, it is characterized in that: the upright support of said frame (20) is vertical columns, telescopic tube or vertical frame.
5. the method that application according to claim 3 sky bridge railings bearing capacity the cannot-harm-detection device detects, it is characterized in that: said gantry base (19) is flat board or plane framework.
6. according to claim 1ly use the method that day bridge railings bearing capacity the cannot-harm-detection device detects, it is characterized in that: in the said step 3 mode of load application in four stages, 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, behind every grade of load, should keep enough rest times, and whether the inspection member exists the sign of fracture, surrender, flexing;
The 3rd, load the peak load reach usability or load-bearing capacity check after, hold lotus 1h at least, whenever measure a subordinate load and deformation values, till deformation values no longer obviously increases in 15min at a distance from 15min;
The 4th, load shedding measures deformation values after each grade load and unloading are all accomplished.
7. describedly use the method that day bridge railings bearing capacity the cannot-harm-detection devices detect according to claim 1 or 6, it is characterized in that: testing result is judged and is comprised the evaluation of usability assay and the evaluation of load-bearing capacity assay in the said step 5.
8. the method that application according to claim 7 sky bridge railings bearing capacity the cannot-harm-detection device detects, it is characterized in that: the evaluation of said usability assay: structure or member through check should satisfy following requirement: load-deformation curve is suitable to be linear relationship basically; Unloading back residual deformation should not surpass 20% of the maximum deformation value that records;
When above-mentioned requirements can not satisfy, test again;
Again load-the distortion in the check of carrying out should be linear basically, and new residual deformation must not be above 10% of the maximum distortion that records in the check of carrying out again.
9. the method that application according to claim 8 sky bridge railings bearing capacity the cannot-harm-detection device detects; It is characterized in that: the evaluation of said 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
is the residual deformation amount; Unit is mm;
is total deformation, and unit is mm.
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|---|---|---|---|
| CN2011100412205A CN102175443B (en) | 2011-02-21 | 2011-02-21 | Device and method for non-destructively testing capacity of overbridge railings |
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|---|---|---|---|
| CN2011100412205A CN102175443B (en) | 2011-02-21 | 2011-02-21 | Device and method for non-destructively testing capacity of overbridge railings |
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| CN102175443B true CN102175443B (en) | 2012-07-04 |
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| CN105223004A (en) * | 2014-07-02 | 2016-01-06 | 西安航空动力股份有限公司 | Air bleed valve tappet hierarchical loading fatigue strength contrast test method |
| CN105784343B (en) * | 2016-03-11 | 2018-12-07 | 常州市建筑科学研究院集团股份有限公司 | Railing horizontal thrust pilot system |
| CN105699188A (en) * | 2016-03-28 | 2016-06-22 | 湖北中精衡建筑检测技术有限责任公司 | Device for detecting horizontal thrust of handrail |
| CN107167523B (en) * | 2017-05-31 | 2019-10-01 | 王燕 | A kind of crack automatic flaw detection device of bridge concrete guardrail |
| CN109682557B (en) * | 2018-12-03 | 2020-11-10 | 北京市市政工程研究院 | Method for evaluating bearing capacity test of pedestrian overpass railing structure |
| CN110068505A (en) * | 2018-12-30 | 2019-07-30 | 常州华厦建设工程质量检测有限公司 | A kind of anti-horizontal loading on-site detecting device of guardrail and its application method |
| CN110749431B (en) * | 2019-11-04 | 2024-07-23 | 北京华路安交通科技有限公司 | Method for detecting anchoring strength of guardrail upright post and reinforcing structure |
| CN111288895A (en) * | 2020-03-11 | 2020-06-16 | 交通运输部公路科学研究所 | Intelligent detection device and detection early warning method for stability of guardrail stand column |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101379246A (en) * | 2006-02-07 | 2009-03-04 | 毛罗·巴斯基耶里 | Single span suspended deck arch bridge |
| CN202002795U (en) * | 2011-02-21 | 2011-10-05 | 北京市市政工程研究院 | Carrying force nondestructive detection device for overpass railing |
-
2011
- 2011-02-21 CN CN2011100412205A patent/CN102175443B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101379246A (en) * | 2006-02-07 | 2009-03-04 | 毛罗·巴斯基耶里 | Single span suspended deck arch bridge |
| CN202002795U (en) * | 2011-02-21 | 2011-10-05 | 北京市市政工程研究院 | Carrying force nondestructive detection device for overpass railing |
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| CN102175443A (en) | 2011-09-07 |
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