CN204718787U - A kind of charger of girder steel monolithic stability bearingtest - Google Patents
A kind of charger of girder steel monolithic stability bearingtest Download PDFInfo
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- CN204718787U CN204718787U CN201520434244.0U CN201520434244U CN204718787U CN 204718787 U CN204718787 U CN 204718787U CN 201520434244 U CN201520434244 U CN 201520434244U CN 204718787 U CN204718787 U CN 204718787U
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- girder steel
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Abstract
A kind of charger of girder steel monolithic stability bearingtest: comprise four-bar mechanism, transition apparatus, lifting jack, loading frame, force snesor loading ball pivot.Described four-bar mechanism comprises grade beam, brace and triangle rigid body; Described transition apparatus is connected with lifting jack with described four-bar mechanism, and the load of lifting jack is passed to four-bar mechanism.Described loading frame is metal rectangle frame.Described loading ball pivot is made up of a concave spherical surface and a convex spherical.The beneficial effects of the utility model are well simulate without in the test of sidewise restraint girder steel monolithic stability, and the restraint condition of load(ing) point place girder steel, makes test findings more accurate.Specifically, the utility model by the constraint of lateral deformation release to girder steel lateral shift of four-bar mechanism, and keeps load straight down; Discharge girder steel torsional restraint by loading relatively rotating in ball pivot between concave spherical surface and convex spherical.
Description
Technical field
The utility model relates to long strands field, particularly the charger of girder steel monolithic stability bearingtest under a kind of span centre single-point loading effect.
Background technology
Steel construction has well, abundant architectural art representation power, is subject to the generally favor of architects; The steel that steel construction uses have the advantages that intensity is high, plasticity good toughness, anti-seismic performance are excellent, can reduce member section, reduce construction weight; Steel construction is more convenient for realizing suitability for industrialized production, and material is recoverable again, is considered to a kind of environmental protection, energy-conservation structural system.The application of domestic and international a series of large-scale steel structure engineering, has promoted the fast development of steel construction subject.
Girder steel is as important structural elements a kind of in steel structure system, and under lateral load effect, its ultimate bearing capacity is often controlled by monolithic stability, and the experimental study of the monolithic stability bearing capacity of girder steel becomes one of research direction most active in Structural Engineering.
Have the free beam of a Concentrated load for span centre as shown in Figure 1, the distortion after its overall collapse as shown in phantom in fig. 1.Fig. 2 is the distortion schematic diagram of load point place beam section, and in Fig. 2 (b), dotted portion is the cross section before unstability, passable from Fig. 2, after beam overall collapse, lateral shift will occur in cross section and with reversing, the load applied will be displaced sideways with cross section, but direction still keeps vertical.In other words, the charger of test does not allow the lateral shift of test beam and reverses and produce constraint, and this makes this type of test become very difficult.
Traditional girder steel monolithic stability test has lifting jack to load and hanging loads two schemes.
Lifting jack loading scheme has following shortcoming: the lifting jack after 1. compressing has larger lateral rigidity, has stronger constraint to the lateral thrust of girder steel; 2. the ball pivot rotational stiffness on lifting jack is comparatively large, produces constraint to the torsion of girder steel.Above shortcoming causes test findings inaccurate.
Hanging loading scheme has following shortcoming: be 1. only applicable to the girder steel test that load is less, be difficult to the problem solving hanging weight when the stability limit load of girder steel is larger; 2., during beam overall collapse, hanging weight can drop suddenly, causes potential safety hazard to the personnel of load application.
Summary of the invention
The purpose of this utility model solves charger Problems existing in the experimental study of girder steel monolithic stability, provides the charger that a kind of energy is safe, reliable, can adapt to girder steel lateral shift and torsional deflection.
The technical scheme adopted for realizing the utility model object is such, a charger for girder steel monolithic stability bearingtest, is characterized in that: comprise four-bar mechanism, transition apparatus, pulling jack, loading frame, force snesor, loading ball pivot, test girder steel.
Described four-bar mechanism comprises and is anchored in ground grade beam, brace and triangle rigid body:
Described grade beam is fixed on ground by ground crab-bolt, and its length direction is vertical with described test girder steel, and upper surface is welded with 4 and connects otic placode, and otic placode is parallel with described grade beam length direction; Described triangle rigid body is the hollow rigid body that Plate Welding combines, and the steel plate being positioned at both sides has three holes respectively, and two, top is for bracing diagonal, and bottom hole is used for connecting device; Described brace is steel connecting rod, and lower end is articulated with the otic placode on described grade beam top respectively by pin, upper end by pin-hinges in described triangle rigid body side plate top circular hole.
Described transition apparatus comprises a grooved metalwork and two roller bearings, grooved metalwork welded top one screw rod, for connecting described pulling jack, circular hole opened by two side plates of grooved metalwork, and described roller bearing is installed in the side plate circular hole of grooved metalwork.
Described pulling jack is for applying vertical load, and bottom is connected with described transition apparatus, and top is connected with the otic placode on described loading frame sill.
Described loading frame is metal rectangle frame, comprises lower and upper cross-member and left and right pillar, sill welds otic placode, for connecting described pulling jack.
Described test girder steel is through the middle part loading frame.
Described force snesor, between described loading frame entablature and described loading ball pivot, is connected with described loading frame entablature by connecting screw rod, for measuring the load be applied on described test girder steel.
Described loading ball pivot, by being positioned over the concave spherical surface of described test girder steel upper surface and being fixed on described loading frame entablature, is positioned at the convex spherical composition below described force snesor:
Described concave spherical surface is lower surface level, and upper surface has the metal nahlock of ball-and-socket; Described convex spherical is connected to metal struts steel plate with bulb, is connected with described loading frame entablature by connecting screw rod.
Further, except load(ing) point adopts device of the present utility model loading, the two ends of described test girder steel are fixed on bearing.The length direction of definition girder steel is z-axis, and horizontal direction vertical is with it x-axis, and the axle perpendicular to xoy face is y-axis.The bearing being positioned at the two ends of girder steel should meet a folder condition, and namely two end bearing energy steel structures are around z-axis torsion and the movement along x, y-axis direction, but can not the rotation of steel structure along x, y-axis and the movement along z-axis.
Further, the hollow rigid body that described triangle rigid body is welded by both sides side plate and junction steel plate, the distance between biside plate is slightly larger than transition apparatus width.
Further, the connection between described brace and described grade beam otic placode, triangle rigid body adopts pinned connection, clearance fit.
Further, described pulling jack is by the triangle rigid body in transition apparatus and described four-bar mechanism.
Further, described pulling jack upper end is connected with the otic placode on described loading frame sill by bearing pin.
Further, the convex spherical diameter of described loading ball pivot is slightly less than concave spherical surface diameter, between anoint to reduce friction force between the two.
Further, during installation, the concave spherical surface of described loading ball pivot places the mid point with described test girder steel upper surface, the dead in line of its axis and convex spherical, force snesor, pulling jack.
The beneficial effect of this charger utility model is:
1. when testing girder steel lateral shift described in, described four-bar linkage structure generation lateral deformation, pulling jack follows the displacement of described four-bar mechanism occurred level, and keeps vertically, and release charger is to the constraint of girder steel lateral shift;
2. test girder steel described in when twisting, rotate between the concave spherical surface of described loading ball pivot and convex spherical, the constraint that release charger reverses described test girder steel;
3. adjust the diameter of described loading ball pivot concave spherical surface and convex spherical, this device can be used for the larger girder steel of the test of different size girder steel overall stability, particularly bearing capacity;
4. this cover charger 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
The distortion schematic diagram of Fig. 2 load point place beam section
Fig. 3 is charger schematic diagram before girder steel unstability;
Fig. 4 is charger schematic diagram after girder steel distortion;
Fig. 5 is that ball pivot rotates schematic diagram
Fig. 6 is charger skeleton view
In figure: four-bar linkage structure 10, grade beam 11, brace 12, triangle rigid body 13, transition apparatus 20, pulling jack 30, loading frame 40, force snesor 50, loading ball pivot 60, test girder steel 70, connecting screw rod 80.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail, but should not be construed the above-mentioned subject area of the utility model and be only limitted to following embodiment.When not departing from the above-mentioned technological thought of the utility model, according to ordinary skill knowledge and customary means, making various replacement and change, all should be included in protection domain of the present utility model.
See Fig. 3 ~ Fig. 6, a kind of charger of girder steel monolithic stability bearingtest, is characterized in that: comprise four-bar mechanism 10, transition apparatus 20, pulling jack 30, load frame 40, force snesor 50, load ball pivot 60, test girder steel 70.
Described four-bar mechanism 10 comprises and is anchored in ground grade beam 11, brace 12 and triangle rigid body 13:
Described grade beam 11 is fixed on ground by ground crab-bolt, and its length direction is vertical with described test girder steel 70, and upper surface is welded with 4 and connects otic placode, and otic placode is parallel with described grade beam 11 length direction; The hollow rigid body that described triangle rigid body 13 combines for Plate Welding, the steel plate being positioned at both sides has three holes respectively, and two, top is for bracing diagonal 12, and bottom hole is used for connecting device 20; Described brace 12 is steel connecting rod, and lower end is articulated with the otic placode on described grade beam 11 top respectively by pin, upper end by pin-hinges in described triangle rigid body 13 side plate top circular hole.
Described transition apparatus 20 comprises a grooved metalwork and two roller bearings, grooved metalwork welded top one screw rod, for connecting described pulling jack 30, circular hole opened by two side plates of grooved metalwork, and described roller bearing is installed in the side plate circular hole of grooved metalwork.
Described pulling jack 30 is for applying vertical load, and bottom is connected with described transition apparatus 20, and top is connected with the otic placode on described loading frame 40 sill.
Described loading frame 40 is metal rectangle frame, comprises lower and upper cross-member and left and right pillar, sill welds otic placode, for connecting described pulling jack 30.
Described test girder steel 70 is through the middle part loading frame.
Described force snesor 50, between described loading frame 40 entablature and described loading ball pivot 60, is connected with described loading frame 40 entablature by connecting screw rod 80, for measuring the load be applied on described test girder steel 70.
Described loading ball pivot 60, by being positioned over the concave spherical surface of described test girder steel upper surface and being fixed on described loading frame 40 entablature, is positioned at the convex spherical composition below described force snesor 50:
Described concave spherical surface is lower surface level, and upper surface has the metal nahlock of ball-and-socket; Described convex spherical is connected to metal struts steel plate with bulb, is connected with described loading frame 40 entablature by connecting screw rod 80.
Principle of work
See Fig. 2, when beam overall collapse, cross section, load(ing) point place will be displaced sideways and reverse, and the charger of test must can adapt to this distortion, and the load that guarantee simultaneously applies straight down.
The utility model devises a four-bar mechanism 10, as shown in Figure 3, before described experiment girder steel 70 unstability, the dead in line of described loading ball pivot 60, force snesor 50, pulling jack 30, four-bar mechanism 11, described brace 12 axis extending line intersection point is positioned on described pulling jack 30 axis, and described pulling jack 30 straight down.When described experiment girder steel 70 overall collapse generation sidesway, as shown in Figure 4, described experiment girder steel 70 drives described loading frame 40 and described pulling jack 30 lateral shift, and each rod member of described four-bar mechanism 10 relatively rotates, to adapt to the sidesway of described loading frame 40.Simultaneously, described brace 12 axis line extending line intersection point is still positioned on described pulling jack 30 axis, but position changes, the run-off the straight of described pulling jack 30 axis, but when the physical dimension of each rod member of described four-bar mechanism 10 and described triangle rigid body 13 is selected suitable, described pulling jack 30 axis meeting run-off the straight angle is minimum, thus ensures load straight down.
The utility model have also been devised one and loads ball pivot 60, its principle of work is as Fig. 6, when twisting when described experiment girder steel 70 overall collapse, convex spherical and the concave spherical surface of described loading ball pivot 60 relatively rotate, because convex spherical radius is slightly less than concave spherical surface, contact area is little, and grease in concave spherical surface, make the rotational stiffness between convex spherical and concave spherical surface minimum, thus release the torsional restraint to described test girder steel 70.
Claims (6)
1. a charger for girder steel monolithic stability bearingtest, is characterized in that: comprise four-bar mechanism (10), transition apparatus (20), pulling jack (30), load frame (40), force snesor (50), load ball pivot (60), test girder steel (70);
Described four-bar mechanism (10) comprises and is anchored in ground grade beam (11), brace (12) and triangle rigid body (13):
Described grade beam (11) is fixed on ground by ground crab-bolt, and its length direction is vertical with described test girder steel (70), and upper surface is welded with 4 and connects otic placode, and otic placode is parallel with described grade beam (11) length direction; The hollow rigid body that described triangle rigid body (13) combines for Plate Welding, the steel plate being positioned at both sides there are three holes respectively, two, top is for bracing diagonal (12), and bottom hole is used for connecting device (20); Described brace (12) is steel connecting rod, and lower end is articulated with the otic placode on described grade beam (11) top respectively by pin, upper end by pin-hinges in described triangle rigid body (13) side plate top circular hole;
Described transition apparatus (20) comprises a grooved metalwork and two roller bearings, grooved metalwork welded top one screw rod, for connecting described pulling jack (30), circular hole opened by two side plates of grooved metalwork, and described roller bearing is installed in the side plate circular hole of grooved metalwork;
Described pulling jack (30) is for applying vertical load, and bottom is connected with described transition apparatus (20), and top is connected with the otic placode on described loading frame (40) sill;
Described loading frame (40) is metal rectangle frame, comprises lower and upper cross-member and left and right pillar, sill welds otic placode, for connecting described pulling jack (30);
Described test girder steel (70) is through the middle part loading frame;
Described force snesor (50) is positioned between described loading frame (40) entablature and described loading ball pivot (60), be connected with described loading frame (40) entablature by connecting screw rod (80), for measuring the load be applied on described test girder steel (70);
Described loading ball pivot (60), by being positioned over the concave spherical surface of described test girder steel upper surface and being fixed on described loading frame (40) entablature, is positioned at the convex spherical composition of described force snesor (50) below:
Described concave spherical surface is lower surface level, and upper surface has the metal nahlock of ball-and-socket; Described convex spherical is connected to metal struts steel plate with bulb, is connected with described loading frame (40) entablature by connecting screw rod (80).
2. the charger of a kind of girder steel monolithic stability bearingtest according to claim 1, it is characterized in that: the hollow rigid body that described triangle rigid body (13) is welded by both sides side plate and junction steel plate, the distance between biside plate is slightly larger than described transition apparatus (20) width.
3. the charger of a kind of girder steel monolithic stability bearingtest according to claim 1, it is characterized in that: the connection between described brace (12) and described grade beam (11) otic placode, triangle rigid body (13) adopts pinned connection, clearance fit.
4. the charger of a kind of girder steel monolithic stability bearingtest according to claim 1, is characterized in that: described pulling jack (30) is by the triangle rigid body (13) in described transition apparatus (20) and described four-bar mechanism (10).
5. the charger of a kind of girder steel monolithic stability bearingtest according to claim 1, is characterized in that: described pulling jack (30) upper end is connected with the otic placode on described loading frame (40) sill by bearing pin.
6. the charger of a kind of girder steel monolithic stability bearingtest according to claim 1, is characterized in that: the convex spherical diameter of described loading ball pivot (60) is slightly less than concave spherical surface diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520434244.0U CN204718787U (en) | 2015-06-19 | 2015-06-19 | A kind of charger of girder steel monolithic stability bearingtest |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520434244.0U CN204718787U (en) | 2015-06-19 | 2015-06-19 | A kind of charger of girder steel monolithic stability bearingtest |
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| CN204718787U true CN204718787U (en) | 2015-10-21 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105092222A (en) * | 2015-06-19 | 2015-11-25 | 重庆大学 | Loading apparatus for bearing strength test of girder integral body stability |
| CN108896257A (en) * | 2018-08-09 | 2018-11-27 | 华南理工大学 | It is a kind of multi-functional without interconnecting piece flexural pivot test tool |
| CN109520848A (en) * | 2018-10-24 | 2019-03-26 | 湖北泰和电气有限公司 | A kind of portable type ground strength detection equipment |
| CN109708976A (en) * | 2019-01-04 | 2019-05-03 | 内蒙古科技大学 | A kind of wall component lateral support device and reversed loading device |
| CN111766154A (en) * | 2020-06-17 | 2020-10-13 | 中国飞机强度研究所 | Curved plate straight edge constraint loading device |
-
2015
- 2015-06-19 CN CN201520434244.0U patent/CN204718787U/en not_active Withdrawn - After Issue
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105092222A (en) * | 2015-06-19 | 2015-11-25 | 重庆大学 | Loading apparatus for bearing strength test of girder integral body stability |
| CN105092222B (en) * | 2015-06-19 | 2017-08-29 | 重庆大学 | A kind of loading device of girder steel monolithic stability bearingtest |
| CN108896257A (en) * | 2018-08-09 | 2018-11-27 | 华南理工大学 | It is a kind of multi-functional without interconnecting piece flexural pivot test tool |
| CN108896257B (en) * | 2018-08-09 | 2023-12-01 | 华南理工大学 | Multifunctional spherical hinge test tool without connecting part |
| CN109520848A (en) * | 2018-10-24 | 2019-03-26 | 湖北泰和电气有限公司 | A kind of portable type ground strength detection equipment |
| CN109520848B (en) * | 2018-10-24 | 2021-06-11 | 湖北泰和电气有限公司 | Portable ground strength detection equipment |
| CN109708976A (en) * | 2019-01-04 | 2019-05-03 | 内蒙古科技大学 | A kind of wall component lateral support device and reversed loading device |
| CN111766154A (en) * | 2020-06-17 | 2020-10-13 | 中国飞机强度研究所 | Curved plate straight edge constraint loading device |
| CN111766154B (en) * | 2020-06-17 | 2023-01-13 | 中国飞机强度研究所 | Curved plate straight edge constraint loading device |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20151021 Effective date of abandoning: 20170829 |