CN203981508U - Vertical ribbed stiffener and wing plate intersternite clearance plane are out of shape fatigue test loading device outward - Google Patents
Vertical ribbed stiffener and wing plate intersternite clearance plane are out of shape fatigue test loading device outward Download PDFInfo
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- CN203981508U CN203981508U CN201420361457.0U CN201420361457U CN203981508U CN 203981508 U CN203981508 U CN 203981508U CN 201420361457 U CN201420361457 U CN 201420361457U CN 203981508 U CN203981508 U CN 203981508U
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Abstract
The utility model relates to a kind of vertical ribbed stiffener and wing plate intersternite clearance plane is out of shape fatigue test loading device outward, it is on concrete leveling layer, to be relatively set with two earth anchors for fixing test part, test block is connected with loading beam by coupling assembling, loading beam is i-shaped beams, and its top flange plate middle part is connected with servo-hydraulic actuator; The utility model utilizes high-strength bolt that test block is fixed on earth anchor, servo-hydraulic actuator provides two centralized cycle loads by loading beam and coupling assembling to web vertical ribbed stiffener, can simulate truly in steel plate girder bridge stull for the acting force of web ribbed stiffener; In addition by rational simplification, the scale of test block is reduced, save test space, simplified construction, reduce the requirement to loading tonnage, and test block replaceability is strong, is easy to dismounting, can facilitate the test of doing economically a large amount of variable elements, has a extensive future.
Description
Technical field
The utility model belongs to technical field of bridge engineering, particularly science of bridge building experimental technique field, and specifically a kind of vertical ribbed stiffener and wing plate intersternite clearance plane are out of shape fatigue test loading device outward.
Background technology
The fatigue problem of steel bridge is having a strong impact on the serviceable life of bridge, and research shows in steel bridge that about 90% fatigue crack problem is all because the outer distortion of face or the secondary stress at tired sensitive details place cause.In Approach To Steel Bridge Designing, lateral ties between each girder be by the vertical ribbed stiffener of stull and girder web plate welding be connected realize, for fear of the welding details generation fatigue failure between vertical ribbed stiffener and the girder tension edge of a wing, conventionally between vertical ribbed stiffener and the girder tension edge of a wing, leave the web gap of tens millimeters.Under Vehicle Load, amount of deflection missionary society between each girder makes stull produce the effect of pulling force or pressure to girder web plate, make the web gap location generating plane outside sweep distortion that rigidity is less, thereby cause larger secondary stress, cause fatigue crack germinate herein and expand.Web clearance plane between vertical ribbed stiffener and wing plate is out of shape fatigue behaviour and stress distribution situation complexity outward, need to be out of shape Fatigue Damage Process outward to the face of this details by torture test and maintenance reinforcement method is furtherd investigate.
It is this details place mechanism of fatigue of research and the rational important means of maintenance reinforcement method that steel bridge web gap location is carried out to torture test, and the maintenance and reinforcement that can be real bridge web gap location fatigue crack provides important scientific basis.But traditional steel bridge web gap fatigue test loading device and test method have the following disadvantages: (1) traditional steel bridge web clearance plane is out of shape the mechanism of fatigue outward and maintenance reinforcement method test is all to adopt large sections girder steel to test, model manufacturing, installation time and effort consuming, and expense is higher, be difficult to realize a large amount of variable element experimental studies of tired details; (2) because the size of sections test specimen is larger, higher to the site requirements of test, test will be simulated the stressed of real bridge needs higher loading tonnage with distortion, and torture test is costly.But, at present also there are not personnel the tired details of the web gap location between the vertical ribbed stiffener of steel bridge and wing plate to be carried out to the experimental test of a large amount of variable elements, and, test at present the charger of steel bridge fatigue behaviour, be difficult to actual outer the distortion and stressing conditions in the web gap between the vertical ribbed stiffener of true reflection and wing plate.Therefore, be badly in need of a kind of steel bridge web clearance plane that can significantly reduce testing expenses, raising test efficiency of research and development and be out of shape fatigue experimental device outward.
Utility model content
Be out of shape the deficiency of torture test technology outward for existing Steel Bridge Deck, the utility model proposes the effect of stull to ribbed stiffener in a kind of can real simulation real bridge, stressed behavior and the real bridge of fatigue sample median ventral plate gap location are consistent, and reliable test result, accurate, to test site and load lower, simple to operate, the easy accessibility of tonnage demand, lower vertical ribbed stiffener and the wing plate intersternite clearance plane of experimentation cost is out of shape fatigue test loading device outward.
To achieve these goals, the technical solution adopted in the utility model is on concrete leveling layer, to be relatively set with two earth anchors for fixing test part, test block is connected with loading beam by coupling assembling, and loading beam is i-shaped beams, and its top flange plate middle part is connected with servo-hydraulic actuator;
Described earth anchor is on L-type base, to be relatively set with two stiffeners, between two stiffeners, is provided with steel anchor box, and steel anchor box is connected with L-type base and concrete leveling layer by foot bolt;
Described coupling assembling is to be connected by web joint between horizontally disposed upper angle steel and the lower angle steel longitudinally arranging, and upper angle steel is connected with the bottom wing listrium of loading beam by high-strength bolt.
The two ends of above-mentioned loading beam are connected with latch closure.
The web ribbed stiffener center line of the loading center line of above-mentioned servo-hydraulic actuator and test block is on same straight line.
Spacing between above-mentioned two relative earth anchors is 500～2000mm.
The top flange plate of above-mentioned loading beam is that width is that 250～550mm, thickness are the rectangular slab that 16～60mm, length are 500～1500mm, loading beam web is that width is that 100～500mm, thickness are the rectangular slab that 12～24mm, length are 500～1500mm, and bottom wing listrium is identical with top flange plate structure.
The horizontal top plate of above-mentioned steel anchor box is that width is that 250～400mm, thickness are the rectangular slab that 18～24mm, length are 300～800mm, and vertically wing plate is that width is that 150～450mm, thickness are the rectangular slab that 16～22mm, length are 400～600mm.
The method for making that above-mentioned vertical ribbed stiffener and wing plate intersternite clearance plane are out of shape fatigue test loading device is outward:
First Plate Welding is become to earth anchor, loads crossbeam and makes processing web joint with design size according to said structure, on the arm being connected with the flange plate of the left and right end of test block, process corresponding bolt hole on L-type base, utilize the upper and lower angle steel of section steel manufacture; Utilize rope by the latch closure of loading beam end, loading beam to be hung on reaction frame temporarily, by bolt, servo-hydraulic actuator is fixed on to the middle part of the top flange plate of loading beam, below the bottom wing listrium of loading beam, bolt connects angle steel, and between upper and lower angle steel, web joint is installed; After the concrete leveling layer for the treatment of base resettlement place reaches intensity, base is placed thereon, and by the leveling bolt at four angles, base is adjusted to level, and test block is fixed between two bases by high-strength bolt, tighten foot bolt; By horizontal ribbed stiffener and the web joint of lower angle steel bolt connecting test part; Come loose after the rope of loading beam termination and just can load and test.
It is to pass through rational Design on Plane that vertical ribbed stiffener of the present utility model and wing plate intersternite clearance plane are out of shape fatigue test loading device outward, utilize high-strength bolt that test block is fixed on base, servo-hydraulic actuator provides two centralized cycle loads by loading beam and coupling assembling to web vertical ribbed stiffener, can simulate truly in steel plate girder bridge stull for the acting force of web ribbed stiffener, realize the variable element test of steel bridge fatigue details, make testing fatigue result accurate, be conducive to instruct the Anti fatigue Design of steel bridge web gap location; In addition by rational simplification, the scale of test block is reduced, save test space, simplified construction, reduce the requirement to loading tonnage, and test block replaceability is strong, is easy to dismounting, can facilitate the test of doing economically a large amount of variable elements, has a extensive future.
Brief description of the drawings
Fig. 1 is the fatigue test loading device structural representation of embodiment 1.
Fig. 2 is the structural representation of loading beam 2 in Fig. 1.
Fig. 3 is the structural representation of coupling assembling 3 in Fig. 1.
Fig. 4 is the structural representation of L-type base 4-4 in Fig. 1.
Fig. 5 is the syndeton schematic diagram of foot bolt 4-2 and steel anchor box 4-1 in Fig. 1.
Embodiment
Below in conjunction with drawings and Examples, the technical solution of the utility model is described further.
Embodiment 1
As shown in Figure 1, the vertical ribbed stiffener of the present embodiment and wing plate intersternite clearance plane are out of shape fatigue test loading device outward and are made up of servo-hydraulic actuator 1, loading beam 2, coupling assembling 3, earth anchor 4 and concrete leveling layer 6.
The loading beam 2 of the present embodiment is to become i-shaped beams by Plate Welding, referring to Fig. 2, its top flange plate 2-1 is that width is 400mm, and thickness is 40mm, the rectangular steel plates that length is 1000mm, loading beam web 2-2 is that width is 200mm, thickness is 20mm, the rectangular steel plates that length is 1000mm, and bottom wing listrium 2-3 is that width is 400mm, thickness is 40mm, the rectangular steel plates that length is 1000mm.For the ease of loading beam 2 is temporarily fixed on reaction frame, two ends, left and right at loading beam 2 top flange plate 2-1 are all welded with the latch closure 2-4 being bent into by bar reinforcement, there is servo-hydraulic actuator 1 top flange plate 2-1 center at loading beam 2 by 4 bolted, can apply cyclic load vertically downward to test block 5.On the bottom wing listrium 2-3 of loading beam 2, be all processed with screw near the position at edge, front and back, it is connected with coupling assembling 3 by the high-strength bolt being arranged in screw.
Referring to Fig. 3, the coupling assembling 3 of the present embodiment is made up of upper angle steel 3-1, web joint 3-2 and lower angle steel 3-3.The upper angle steel 3-1 of the present embodiment and lower angle steel 3-3 such as all adopt at the limb single angle, and upper angle steel 3-1 is horizontally disposed with, and totally 4, be divided into 2 groups, two front and back are symmetrical in every group, and the limb of each upper angle steel 3-1 is wide is 160mm, and limb is thick is 16mm, and long is 320mm.Between angle steel 3-1, having length by bolted on symmetrically arranged is between two 300mm, wide is 300mm, thickness is that the rectangular steel plates of 20mm is as web joint 3-2, a limb of going up angle steel 3-1 level is fastening by the bottom wing listrium 2-3 of high-strength bolt and loading beam 2, another limb is connected with the upside of web joint 3-2, by web joint 3-2, upper angle steel 3-1 is oppositely arranged between two.Downside at web joint 3-2 has 4 lower angle steel 3-3 that longitudinally arrange by bolted-on, descend angle steel 3-3 corresponding one by one with upper angle steel 3-1, and symmetrical between two, the limb of each lower angle steel 3-3 is wide is 100mm, limb is thick is 10mm, long is 250mm, and its upper end and web joint 3-2 are fastening, and lower end is by the vertical ribbed stiffener bolt of bolt and test block 5.
Referring to Figure 4 and 5, on the concrete leveling layer 6 of test, there are two earth anchors 4 by bolted, the two ends flange plate of test block 5 is fixed between two earth anchors 4 with high-strength bolt, two earth anchor 4 structural symmetry, and distance each other and test block 5 is equal in length.The earth anchor 4 of the present embodiment is made up of L-type base 4-4, stiffener 4-3, steel anchor box 4-1 and foot bolt 4-2.An arm of L-type base 4-4 is to lie in a horizontal plane in the rectangular steel plates in concrete foundation for leveling, and its width is 800mm, and thickness is 40mm, and length is 800mm; Another arm is that width is 360mm, thickness is 40mm, length is the rectangular steel plates of 800mm, be processed with screw thereon, left end flange plate or right-hand member flange plate by high-strength bolt and test block 5 are fastening, the stiffener 4-3 that is vertically welded with two trapezium structures at the opposite side of this arm on a side contrary with test block 5, long limit one side is connected with an arm of L-type base; The minor face of each stiffener 4-3 is 26mm, and long limit is 360mm, and the length of horizontal direction is 650mm, is welded with steel anchor box 4-1 between two stiffener 4-3.The steel anchor box 4-1 of the present embodiment is made up of horizontal top plate and vertical wing plate, vertically wing plate is vertically welded in the below, two ends of horizontal top plate, the horizontal top plate of steel anchor box 4-1 is that width is 310mm, thickness is 20mm, length is the rectangular slab of 500mm, vertically wing plate is welded between the stiffener 4-3 of L-type base 4-4, it is that width is 200mm, thickness is 20mmm, length is the rectangular slab of 500mm, foot bolt 4-2 is installed in the horizontal top plate of steel anchor box 4-1, the screw diameter of this foot bolt 4-2 is 60mm, lower end extends in the geosyncline of concrete foundation through base 4-4 and concrete leveling layer 6, steel anchor box 4-1 and base 4-4 are fastened in concrete foundation.
The high-strength bolt that the present embodiment adopts is all high-strength bolts of friction-type M-22.
The test block 5 of the present embodiment is i-shaped beams, its 2 flange plates are all that width is 300mm, thickness is 24mm, length is the rectangular steel plates of 600mm, and web is that width is 600mm, and thickness is 8mm, length is the rectangular steel plates of 870mm, ribbed stiffener is that width is 120mm, and thickness is 6mm, the rectangular steel plates that length is 790mm.
The present embodiment simulates vertical ribbed stiffener as an example of this test block 5 example and wing plate intersternite clearance plane is out of shape torture test outward, conventionally charger of the present utility model is combined with dynamic test set, and its principle of work is:
Earth anchor 4 is fixed on concrete leveling layer 6 by foot bolt 4-2, and test block 5 is fixed between earth anchor 4 by high-strength bolt, and ensures that the center line of test block 5 ribbed stiffeners and servo-hydraulic actuator 1 load center line on same straight line.Before on-test, should determine the amplitude and the frequency that load by static test, external hydraulic oil pump to servo-hydraulic actuator 1 fuel feeding after, servo-hydraulic actuator 1 is started working, to loading beam 2 load applications, provide two concentrated cyclic loads by coupling assembling 3 to test block 5, load and mainly realize by pulling force, avoid test block 5 that pressurized flexing occurs.When test, be pasted with foil gauge at the tired measuring point place, web gap of the vertical ribbed stiffener of test block 5 and flange plate, web welding position, utilize foil gauge test stress to change, and stress test data are sent to dynamic test set by wire, the stress at test point place is carried out to Real-Time Monitoring, recorded web gap location fatigue crack initiation and spread scenarios every 20 minutes to 120 minutes.Along with the continuous growth of load cycle index, the fatigue damage of web gap location is constantly accumulated, and face is out of shape maximal value outward while reaching 30mm to 50mm, finishes test.After completing the test of a test block 5, pull down lower angle steel 3-3, the foot bolt 4-2 that comes loose, just replaceable test block 5 of the high-strength bolt that the upper and lower edge of a wing of test block 5 that comes loose is connected with fixed head, carries out the test of next parameter testing part 5.
In process of the test, torture test loads while adopting displacement control, and the deflection applying is 0.01mm～50.0mm, both can meet the requirement of large deformation, also can realize the test accuracy requirement of small deformation; When torture test loads the control of employing power, the scope of load application is 1.0kN～500.0kN, both can meet the fatigue loading under large loading condition, can realize again the test simulation of small load.
Embodiment 2
The loading beam 2 top flange plate 2-1 of the present embodiment are that width is 250mm, thickness is 16mm, length is the rectangular steel plates of 500mm, loading beam web 2-2 is that width is 100mm, thickness is 12mm, length is the rectangular steel plates of 500mm, the geometric configuration of bottom wing listrium 2-3 and top flange plate 2-1 and measure-alike.
The horizontal top plate of the steel anchor box 4-1 of the present embodiment is that width is 250mm, and thickness is 18mm, the rectangular slab that length is 300mm, and vertically wing plate is that width is 150mm, thickness is 16mmm, the rectangular slab that length is 400mm.
Other parts and annexation thereof are identical with embodiment 1.
Embodiment 3
The loading beam 2 top flange plate 2-1 of the present embodiment are that width is 550mm, thickness is 60mm, length is the rectangular steel plates of 1500mm, loading beam web 2-2 is that width is 500mm, thickness is 24mm, length is the rectangular steel plates of 1500mm, the geometric configuration of bottom wing listrium 2-3 and top flange plate 2-1 and measure-alike.
The horizontal top plate of the steel anchor box 4-1 of the present embodiment is that width is 400mm, and thickness is 24mm, the rectangular slab that length is 800mm, and vertically wing plate is that width is 450mm, thickness is 22mmm, the rectangular slab that length is 600mm.
Other parts and annexation thereof are identical with embodiment 1.
The technical solution of the utility model is not limited only to above-mentioned enforcement situation, and the dimensions of each parts can regulate according to actual service condition.On basis of the present utility model, simply combine or convert and all belong to utility model design of the present utility model.
Claims (6)
1. a vertical ribbed stiffener and wing plate intersternite clearance plane are out of shape fatigue test loading device outward, it is characterized in that: on concrete leveling layer (6), be relatively set with two earth anchors for fixing test part (4), test block (5) is connected with loading beam (2) by coupling assembling (3), loading beam (2) is i-shaped beams, and its top flange plate (2-1) middle part is connected with servo-hydraulic actuator (1);
Described earth anchor (4) is on L-type base (4-4), to be relatively set with two stiffeners (4-3), between two stiffeners (4-3), be provided with steel anchor box (4-1), steel anchor box (4-1) is connected with L-type base (4-4) and concrete leveling layer (6) by foot bolt (4-2);
Described coupling assembling (3) is to be connected by web joint (3-2) between horizontally disposed upper angle steel (3-1) and the lower angle steel (3-3) longitudinally arranging, and upper angle steel (3-1) is connected with the bottom wing listrium (2-3) of loading beam (2) by high-strength bolt.
2. vertical ribbed stiffener according to claim 1 and wing plate intersternite clearance plane are out of shape fatigue test loading device outward, it is characterized in that: the two ends of described loading beam (2) are connected with latch closure (2-4).
3. vertical ribbed stiffener according to claim 1 and wing plate intersternite clearance plane are out of shape fatigue test loading device outward, it is characterized in that: the web ribbed stiffener center line of the loading center line of described servo-hydraulic actuator (1) and test block (5) is on same straight line.
4. vertical ribbed stiffener according to claim 1 and wing plate intersternite clearance plane are out of shape fatigue test loading device outward, it is characterized in that: the spacing between relative two earth anchors (4) is 500～2000mm.
5. vertical ribbed stiffener according to claim 1 and wing plate intersternite clearance plane are out of shape fatigue test loading device outward, it is characterized in that: the top flange plate (2-1) of described loading beam (2) is that width is that 250～550mm, thickness are the rectangular slab that 16～60mm, length are 500～1500mm, loading beam web (2-2) is that width is that 100～500mm, thickness are the rectangular slab that 12～24mm, length are 500～1500mm, and bottom wing listrium (2-3) is identical with top flange plate (2-1) structure.
6. vertical ribbed stiffener according to claim 1 and wing plate intersternite clearance plane are out of shape fatigue test loading device outward, it is characterized in that: the horizontal top plate of described steel anchor box (4-1) is that width is that 250～400mm, thickness are the rectangular slab that 18～24mm, length are 300～800mm, vertically wing plate is that width is that 150～450mm, thickness are the rectangular slab that 16～22mm, length are 400～600mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420361457.0U CN203981508U (en) | 2014-06-30 | 2014-06-30 | Vertical ribbed stiffener and wing plate intersternite clearance plane are out of shape fatigue test loading device outward |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420361457.0U CN203981508U (en) | 2014-06-30 | 2014-06-30 | Vertical ribbed stiffener and wing plate intersternite clearance plane are out of shape fatigue test loading device outward |
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| Publication Number | Publication Date |
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| CN203981508U true CN203981508U (en) | 2014-12-03 |
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| CN201420361457.0U Withdrawn - After Issue CN203981508U (en) | 2014-06-30 | 2014-06-30 | Vertical ribbed stiffener and wing plate intersternite clearance plane are out of shape fatigue test loading device outward |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104062185A (en) * | 2014-06-30 | 2014-09-24 | 长安大学 | External deformation fatigue test loading device for web clearance plane between vertical stiffening rib and wing plate |
-
2014
- 2014-06-30 CN CN201420361457.0U patent/CN203981508U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104062185A (en) * | 2014-06-30 | 2014-09-24 | 长安大学 | External deformation fatigue test loading device for web clearance plane between vertical stiffening rib and wing plate |
| CN104062185B (en) * | 2014-06-30 | 2016-03-30 | 长安大学 | Vertical ribbed stiffener and wing plate intersternite clearance plane are out of shape fatigue test loading device outward |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20141203 Effective date of abandoning: 20160330 |
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| C25 | Abandonment of patent right or utility model to avoid double patenting |