CN105092223A - Integral stabilization test loading system of steel beam with lateral constriction under effect of single point loading - Google Patents
Integral stabilization test loading system of steel beam with lateral constriction under effect of single point loading Download PDFInfo
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- CN105092223A CN105092223A CN201510344413.6A CN201510344413A CN105092223A CN 105092223 A CN105092223 A CN 105092223A CN 201510344413 A CN201510344413 A CN 201510344413A CN 105092223 A CN105092223 A CN 105092223A
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- 238000012360 testing method Methods 0.000 title claims abstract description 78
- 238000011068 loading method Methods 0.000 title claims abstract description 69
- 230000000694 effects Effects 0.000 title claims description 12
- 230000006641 stabilisation Effects 0.000 title abstract 3
- 238000011105 stabilization Methods 0.000 title abstract 3
- 238000005096 rolling process Methods 0.000 claims abstract description 23
- 238000006243 chemical reaction Methods 0.000 claims abstract description 22
- 239000002184 metal Substances 0.000 claims description 3
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- 238000005452 bending Methods 0.000 abstract 1
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- 238000011160 research Methods 0.000 description 2
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Abstract
The invention discloses an integral stabilization test loading system of a steel beam with lateral constriction under an action of single point loading, comprising a reaction frame consisting of a reaction column and a reaction beam, a lateral constriction device consisting of a vertical rolling device and a horizontal rolling device, a load applying device consisting of a jack and a loading frame, a load collection device and a horizontal rotation device. The invention can better simulate the steel beam constriction condition at the loading point in stabilization test of the steel beam having the lateral constriction, and enables the test result to be accurate. Particularly, the invention releases the bending constriction and vertical displacement constriction of the steel beam in the plane and outside the plane through the lateral constriction device limiting the lateral displacement and twisting of the test steel beam of the loading point, the vertical rolling of the vertical rolling bearing and horizontal rotation of the horizontal rotation device.
Description
Technical field
The present invention relates to long strands field, particularly a kind of span centre has the charger of monolithic stability bearingtest under sidewise restraint girder steel single-point loading effect.
Background technology
Because steel have higher intensity, it is less that steel structure member cross section is often done, and steel plate used is also thinner, and this causes steel structure member bearing capacity control action by monolithic stability often, and girder steel is no exception.One of most active at present direction to the research of girder steel monolithic stability bearing capacity.
Span centre is as shown in Figure 1 had to a sidewise restraint and bears the free beam of Concentrated load, and the distortion after its overall collapse as shown in phantom in fig. 1.As can be seen from deformation pattern, girder steel should be able to rotate around transverse axis (x-axis), vertical axis (y-axis) at load point place, and can vertically axle translation, but can not rotate around the longitudinal axis (z-axis), also can not along transverse axis translation.
Test traditional loading method many employings lifting jack to this kind of stress form girder steel monolithic stability directly to load, there is following shortcoming:
1. lifting jack and girder steel Contact face are comparatively large, have very large friction force, limit the rotation of girder steel around vertical axis after compression;
2. girder steel retrains along the translation of transverse axis by the lateral rigidity of lifting jack, but the similar cantilever member of lifting jack, sidewise restraint rigidity is obviously not enough;
3. the reliable constraint that girder steel reverses around the longitudinal axis cannot be provided.
Above shortcoming causes test findings inaccurate.
Summary of the invention
The object of the invention is there is being sidewise restraint girder steel under single-point loading effect in the research of monolithic stability bearingtest for solving, traditional loading method causes the inaccurate problem of test findings.
The technical scheme adopted for realizing the object of the invention is such, devise one and have sidewise restraint girder steel monolithic stability plate test loading system under single-point loading effect, it is characterized in that: comprise test girder steel, reaction frame, load bringing device, vertical tourelle, horizontal rolling device, horizontally rotate device and load harvester.
Described reaction frame comprise two vertical and be fixed on the counter-force post of level ground, and be erected at reaction beam between two counter-force posts, level.
Test girder steel is through counter-force post.Respectively there is a bearing at the two ends of described reaction frame.The two ends of described test girder steel are supported on these two bearings respectively.
Described load bringing device comprises lifting jack and loads frame.Described lifting jack is fixed on the lower surface of reaction beam.The expansion link of described lifting jack is perpendicular to surface level, and its prolonging direction sweeps away.
Described loading frame is the rectangular metal frame between two counter-force posts, is spliced by entablature, sill, left column and right column.The upper end of described loading frame is connected on the expansion link of described lifting jack.Described test girder steel is through loading frame.
On the entablature of described loading frame and sill, be respectively provided with two vertical tourelles.Described vertical tourelle is made up of a vertical bearing and vertical retainer:
Be arranged in the vertical tourelle of entablature, the lower end of described vertical retainer is connected to the upper surface of entablature, and upper end to reach above entablature and connects the inner ring of vertical bearing.The length direction being axially parallel to test girder steel of described vertical bearing.The outer ring of described vertical bearing contacts with counter-force post, and be limited in by described loading frame between two counter-force posts, described vertical bearing can freely rotate.
Be arranged in the vertical tourelle of sill, the upper end of described vertical retainer is connected to the lower surface of sill, and lower end to reach below sill and connects the inner ring of vertical bearing.The length direction being axially parallel to test girder steel of described vertical bearing.The outer ring of described vertical bearing contacts with counter-force post, and be limited in by described loading frame between two counter-force posts, described vertical bearing can freely rotate.
On the left column of described loading frame and right column, be respectively provided with two horizontal rolling devices.Described horizontal rolling device is made up of a horizontal bearing, horizontal bearing retainer:
Described horizontal bearing retainer is connected with right column with the left column of described loading frame, can follow the vertically movement together of described loading frame, and the described horizontal bearing retainer other end connects the inner ring of horizontal bearing.The length direction being axially perpendicular to described test beam of described horizontal bearing, and vertically downward, the outer ring of described horizontal bearing respectively at the upper and lower edge of a wing contact of described test girder steel, and can freely be rotated.Described horizontal rolling device limits lateral shift and the torsion of described test girder steel.
It is described that to horizontally rotate device be a tapered roller thrust bearing, be positioned over described test girder steel upper surface center, tapered roller thrust bearing is axially perpendicular to described test girder steel length direction, and vertically downward, by adapting to described test girder steel lateral thrust around its axial rotation.
The collection of described load harvester is a special force snesor, for gathering the magnitude of load be applied on affiliated test girder steel.
Further, described lifting jack is connected on reaction beam by train wheel bridge and upper screw rod, and described loading frame is connected on lifting jack expansion link by middle clamp plate, middle screw rod.
Further, the fixed form of described vertical tourelle is: be connected on the crossbeam of loading frame by vertical tourelle by high-strength bolt.
Further, the fixed form of described horizontal rolling device is: be connected on the column of loading frame by horizontal rolling device by connecting screw rod and clamping plate.
Further, the fixed form of described load harvester is: be connected on middle clamp plate by lower plate, lower screw rod.
Further, described lifting jack, load harvester, the center line horizontally rotating device must overlap, and overlap with described test girder steel vertical axis.
Further, between described horizontal bearing retainer and described loading frame column, adjusting bolt is set, for regulating the spacing of left and right horizontal bearing, to adapt to the width of different tests girder steel.
This charger beneficial effect of the invention is:
1. test girder steel described in be limited in loading frame by horizontal rolling device, described loading frame is limited between counter-force post by vertical tourelle, thus limits the lateral shift of described test girder steel, and limits the torsion of described test girder steel;
2. during load application, described vertical axis roll hold produce rotate and with described loading frame, test together with girder steel and moves down, thus release is to the vertical constraint of testing girder steel;
3. when testing girder steel generation lateral thrust described in, described tapered roller thrust bearing rotates, and the horizontal bearing of described horizontal rolling device rotates simultaneously, thus release is to the perverted constraint of girder steel;
4. this loading system can adapt to the test girder steel of different cross section form, specification, and can reuse, and reduces experimentation cost.
Accompanying drawing explanation
Fig. 1 is the distortion schematic diagram after girder steel overall collapse;
Fig. 2 has sidewise restraint loading system elevation drawing;
Fig. 3 is the A-A direction view of Fig. 2
Fig. 4 adopts the present invention to carry out the photo tested;
Fig. 5 is the photo adopting loading system of the present invention;
Fig. 6 adopts the present invention to test photo after girder steel overall collapse on test stand;
Fig. 7 is the photo trying ground after adopting the present invention to test girder steel overall collapse.
In figure: reaction frame 10, counter-force post 11, reaction beam 12, load bringing device 20, lifting jack 21, load frame 22, train wheel bridge 23, middle clamp plate 24, upper screw rod 25, middle screw rod 26, vertical tourelle 30, vertical bearing 31, vertical retainer 32, high-strength bolt 33, horizontal rolling device 40, horizontal bearing 41, horizontal bearing retainer 42, connecting screw rod 43, adjusting bolt 44, clamping plate 45, load harvester 50, force snesor 51, lower screw rod 52, lower plate 53, horizontally rotate device 60, test girder steel 70.
Embodiment
Below in conjunction with accompanying drawing and case study on implementation, the invention will be further described, but should not be construed the above-mentioned subject area of the present invention and be only limitted to following case study on implementation.Without departing from the idea case in the present invention described above, according to ordinary skill knowledge and customary means, make various replacement and change, all should be included in protection scope of the present invention.
The present invention devises one sidewise restraint girder steel monolithic stability plate test loading system under single-point loading effect, comprises test girder steel 70, reaction frame 10, load bringing device 20, vertical tourelle 30, horizontal rolling device 40, load harvester 50 and horizontally rotates device 60.
Described reaction frame 10 comprise two vertical and be fixed on the counter-force post 11 of level ground, and be erected at reaction beam 12 between two counter-force posts 11, level.
Test girder steel 70 is through counter-force post 11.Respectively there is a bearing at the two ends of described reaction frame 10.The two ends of described test girder steel 70 are supported on these two bearings respectively.
Described load bringing device 20 comprises lifting jack 21 and loads frame 22.Described lifting jack 21 is fixed on the lower surface of reaction beam 12.The expansion link of described lifting jack 21 is perpendicular to surface level, and its prolonging direction sweeps away.
Described loading frame 22 is the rectangular metal frames between two counter-force posts 11, is spliced by entablature, sill, left column and right column.The upper end of described loading frame 22 is connected on the expansion link of lifting jack 21.Described test girder steel 70 is through loading frame 22.
On the entablature of described loading frame 22 and sill, be respectively provided with two vertical tourelles 30.Described vertical tourelle 30 is made up of a vertical bearing 31 and vertical retainer 32:
Be arranged in the vertical tourelle 30 of entablature, the lower end of described vertical retainer 32 is connected to the upper surface of entablature, and upper end to reach above entablature and connects the inner ring of vertical bearing 31.The length direction being axially parallel to test girder steel 70 of described vertical bearing 31.The outer ring of described vertical bearing 32 contacts with counter-force post, is limited in by described loading frame 22 between two counter-force posts 11, and described vertical bearing 31 can freely rotate.
Be arranged in the vertical tourelle 30 of sill, the upper end of described vertical retainer 31 is connected to the lower surface of sill, and lower end to reach below sill and connects the inner ring of vertical bearing 30.The length direction being axially parallel to test girder steel 70 of described vertical bearing 31.The outer ring of described vertical bearing 32 contacts with counter-force post, is limited in by described loading frame 22 between two counter-force posts 11, and described vertical bearing 31 can freely rotate.
On the left column of described loading frame 22 and right column, be respectively provided with two horizontal rolling devices 40.Described horizontal rolling device is made up of a horizontal bearing 41, horizontal bearing retainer 42:
Left column or the right column of described horizontal bearing retainer 42 and described loading frame 22 are connected, and can follow the vertically movement together of described loading frame 22, and described horizontal bearing retainer 42 other end connects the inner ring of horizontal bearing 41.The length direction being axially perpendicular to described test beam 70 of described horizontal bearing 41, and straight down, the outer ring of described horizontal bearing 41 respectively at the upper and lower edge of a wing contact of described test girder steel 70, and can freely be rotated.Described horizontal rolling device 40 limits lateral shift and the torsion of described test girder steel 70.
It is described that to horizontally rotate device 60 be a tapered roller thrust bearing, be positioned over described test girder steel 70 upper surface center, tapered roller thrust bearing is axially perpendicular to described test girder steel 70 length direction, and vertically downward, by adapting to the lateral thrust of described test girder steel 70 around the rotation of its axis.
The collection of described load harvester 50 is a special force snesor, for gathering the magnitude of load be applied on affiliated test girder steel 70.
Fig. 4 ~ Fig. 7 is the case study on implementation carrying out girder steel monolithic stability bearingtest by the present invention, and Fig. 4 is a whole set of test unit photo, and Fig. 5 installs photo by the loading system of the present invention's design, and Fig. 6, Fig. 7 are the photo after girder steel lateral bucking.
In process of the test, with the increase of load, load frame 22 downward synchronous shift together with test beam 70, but be limited between counter-force post, during test beam overall collapse, the tapered roller thrust bearing being positioned at test beam upper surface obviously rotates, and the horizontal rolling bearing 41 being positioned at lower flange on test beam 70 produces and rotates, and releases the perverted constraint of test beam
What deserves to be explained is, Fig. 6, Fig. 7 clearly illustrate, after overall collapse, test beam cross section can be rotated around transverse axis (x-axis), vertical axis (y-axis), and can vertically axle translation, but do not rotate, also without the translation along horizontal axis around the longitudinal axis (z-axis).Reach re-set target completely.
Claims (6)
1. there is sidewise restraint girder steel monolithic stability plate test loading system under single-point loading effect, it is characterized in that: comprise test girder steel (70), reaction frame (10), load bringing device (20), vertical tourelle (30), horizontal rolling device (40), load harvester (50) and horizontally rotate device (60);
Described reaction frame (10) comprise two vertical and be fixed on the counter-force post (11) of level ground, and be erected at reaction beam (12) between two counter-force posts (11), level;
Test girder steel (70) is through counter-force post (11); Respectively there is a bearing at the two ends of described reaction frame (10); The two ends of described test girder steel (70) are supported on these two bearings respectively;
Described load bringing device (20) comprises lifting jack (21) and loads frame (22); Described lifting jack (21) is fixed on the lower surface of reaction beam (12); The expansion link of described lifting jack (21) is perpendicular to surface level, and its prolonging direction sweeps away;
Described loading frame (22) is positioned at the rectangular metal frame between two counter-force posts (11), is spliced by entablature, sill, left column and right column; The upper end of described loading frame (22) is connected on the expansion link of lifting jack (21); Described test girder steel (70) is through loading frame (22);
On the entablature of described loading frame (22) and sill, be respectively provided with two vertical tourelles (30); Described vertical tourelle (30) is made up of a vertical bearing (31) and vertical retainer (32):
Be arranged in the vertical tourelle (30) of entablature, the lower end of described vertical retainer (32) is connected to the upper surface of entablature, and upper end to reach above entablature and connects the inner ring of vertical bearing (31); The length direction being axially parallel to test girder steel (70) of described vertical bearing (31); The outer ring of described vertical bearing (32) contacts with counter-force post, and described loading frame (22) be limited between two counter-force posts (11), described vertical bearing (31) can freely be rotated;
Be arranged in the vertical tourelle (30) of sill, the upper end of described vertical retainer (31) is connected to the lower surface of sill, and lower end to reach below sill and connects the inner ring of vertical bearing (30); The length direction being axially parallel to test girder steel (70) of described vertical bearing (31); The outer ring of described vertical bearing (32) contacts with counter-force post, and described loading frame (22) be limited between two counter-force posts (11), described vertical bearing (31) can freely be rotated;
On the left column of described loading frame (22) and right column, be respectively provided with two horizontal rolling devices (40); Described horizontal rolling device is made up of a horizontal bearing (41), horizontal bearing retainer (42):
Left column or the right column of described horizontal bearing retainer (42) and described loading frame (22) are connected, can follow the vertically movement together of described loading frame (22), described horizontal bearing retainer (42) other end connects the inner ring of horizontal bearing (41); The length direction being axially perpendicular to described test beam (70) of described horizontal bearing (41), and straight down, the outer ring of described horizontal bearing (41) respectively at the upper and lower edge of a wing contact of described test girder steel (70), and can freely be rotated; Described horizontal rolling device (40) limits lateral shift and the torsion of described test girder steel (70);
It is described that to horizontally rotate device (60) be a tapered roller thrust bearing, be positioned over described test girder steel (70) upper surface center, tapered roller thrust bearing is axially perpendicular to described test girder steel (70) length direction, and vertically downward, by adapting to described test girder steel (70) lateral thrust around the rotation of its axis.
It is a special force snesor that described load harvester (50) gathers, for gathering the magnitude of load be applied on affiliated test girder steel (70).
2. one according to claim 1 has sidewise restraint girder steel monolithic stability plate test loading system under single-point loading effect, it is characterized in that: described lifting jack (21) is connected on reaction beam (12) by train wheel bridge (23) and upper screw rod (25), load frame (22) and be connected on lifting jack (21) by middle clamp plate (24), middle screw rod (26).
3. one according to claim 1 has sidewise restraint girder steel monolithic stability plate test loading system under single-point loading effect, it is characterized in that: the fixed form of described vertical tourelle (30) is: be connected on the lower and upper cross-member loading frame (22) by high-strength bolt (33).
4. one according to claim 1 has sidewise restraint girder steel monolithic stability plate test loading system under single-point loading effect, it is characterized in that: the fixed form of described horizontal rolling device (40) is: be connected to its spacing on loading frame (22) left and right pillar by connecting screw rod (43) and clamping plate (45) and regulated by adjusting bolt (44).
5. one according to claim 1 has sidewise restraint girder steel monolithic stability plate test loading system under single-point loading effect, it is characterized in that: comprise a tapered roller thrust bearing, is positioned over described test girder steel (70) upper surface.
6. one according to claim 1 has sidewise restraint girder steel monolithic stability plate test loading system under single-point loading effect, it is characterized in that: described load harvester (50) comprises force snesor (51), connecting screw rod (52); Load harvester (50) be installed on charger (20) by connecting screw rod (52) and horizontally rotate between device (60).
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| CN106644443A (en) * | 2016-12-23 | 2017-05-10 | 南京工程学院 | Clamping base device of hollow flange steel beam stabilization test |
| CN106969978A (en) * | 2017-05-16 | 2017-07-21 | 华北理工大学 | Axial tension experimental rig and its test method under effect of contraction |
| CN107063658A (en) * | 2017-03-13 | 2017-08-18 | 天津城建大学 | Wall, node or the lateral support device of beam test in structure laboratory |
| CN108007790A (en) * | 2018-01-05 | 2018-05-08 | 沈阳建筑大学 | A kind of assembled girder steel monolithic stability experiment load loading device and method |
| CN109100211A (en) * | 2018-07-30 | 2018-12-28 | 中国建筑股份有限公司 | The feed back control system and control method of test component space sidewise restraint load |
| CN109708977A (en) * | 2019-01-04 | 2019-05-03 | 内蒙古科技大学 | Anti-buckling lateral support device outside a kind of plane for reversed loading |
| CN110987624A (en) * | 2019-12-20 | 2020-04-10 | 华中科技大学 | A loading device for horizontal steel curved beam overall stability is experimental |
| CN111735687A (en) * | 2020-06-09 | 2020-10-02 | 东南大学 | Four-point bending device for integral stability test of loading point constraint type steel beam |
| CN113916684A (en) * | 2021-10-14 | 2022-01-11 | 西南石油大学 | A loading device for girder steel four-point bending stability is experimental |
| CN114112745A (en) * | 2021-11-22 | 2022-03-01 | 河北建筑工程学院 | Assembled loading device for beam-column connection semi-rigid node test |
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| CN107063658A (en) * | 2017-03-13 | 2017-08-18 | 天津城建大学 | Wall, node or the lateral support device of beam test in structure laboratory |
| CN107063658B (en) * | 2017-03-13 | 2023-12-29 | 天津城建大学 | Lateral supporting device for wall body, node or beam test in structural laboratory |
| CN106969978B (en) * | 2017-05-16 | 2023-06-09 | 华北理工大学 | Axial tension test device under constraint action and test method thereof |
| CN106969978A (en) * | 2017-05-16 | 2017-07-21 | 华北理工大学 | Axial tension experimental rig and its test method under effect of contraction |
| CN108007790A (en) * | 2018-01-05 | 2018-05-08 | 沈阳建筑大学 | A kind of assembled girder steel monolithic stability experiment load loading device and method |
| CN109100211A (en) * | 2018-07-30 | 2018-12-28 | 中国建筑股份有限公司 | The feed back control system and control method of test component space sidewise restraint load |
| CN109708977A (en) * | 2019-01-04 | 2019-05-03 | 内蒙古科技大学 | Anti-buckling lateral support device outside a kind of plane for reversed loading |
| CN110987624A (en) * | 2019-12-20 | 2020-04-10 | 华中科技大学 | A loading device for horizontal steel curved beam overall stability is experimental |
| CN110987624B (en) * | 2019-12-20 | 2021-06-11 | 华中科技大学 | A loading device for horizontal steel curved beam overall stability is experimental |
| CN111735687B (en) * | 2020-06-09 | 2022-04-05 | 东南大学 | Four-point bending device for integral stability test of loading point constraint type steel beam |
| CN111735687A (en) * | 2020-06-09 | 2020-10-02 | 东南大学 | Four-point bending device for integral stability test of loading point constraint type steel beam |
| CN113916684A (en) * | 2021-10-14 | 2022-01-11 | 西南石油大学 | A loading device for girder steel four-point bending stability is experimental |
| CN113916684B (en) * | 2021-10-14 | 2023-11-10 | 西南石油大学 | Loading device for four-point bending stability test of steel beam |
| CN114112745A (en) * | 2021-11-22 | 2022-03-01 | 河北建筑工程学院 | Assembled loading device for beam-column connection semi-rigid node test |
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| CN105092223B (en) | 2017-11-14 |
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