CN206563674U

CN206563674U - A kind of box beam torsion test device

Info

Publication number: CN206563674U
Application number: CN201720249399.6U
Authority: CN
Inventors: 冀伟; 魏源; 何丽琴; 孙斌; 周闻; 董艳彪; 李丽园
Original assignee: Lanzhou Jiaotong University
Current assignee: Lanzhou Jiaotong University
Priority date: 2017-03-15
Filing date: 2017-03-15
Publication date: 2017-10-17
Anticipated expiration: 2027-03-15

Abstract

The utility model discloses a kind of box beam torsion test device；It includes loading arm, movable bearing support, the dead load acted on by live loaded leg on loading arm decomposes beam, dead load instrument, detecting instrument, loading arm includes the bottom plate being supported on movable bearing support, lengthening loading plate above bottom plate, it is removably attachable to bottom plate and lengthens the high-strength bolt nut assembly between loading plate, high-strength bolt nut assembly is located at the both sides of box beam length direction, and it is clamped with protective baffle plate between high-strength bolt nut assembly and box beam, two are provided with above lengthening loading plate to be set up in parallel and the track backplate isometric with lengthening loading plate, live loaded leg is acted between two track backplates；The utility model reasonable in design, structural strength are high, protect the end of box beam using the structure design of loading arm, it is to avoid because misoperation is crushed, while utilizing the cooperation of the track backplate on live loaded leg and loading arm so that arm of force regulation more facilitates.

Description

A kind of box beam torsion test device

Technical field

The utility model is related to bridge structure experimental technique field, and in particular to a kind of box beam torsion test device.

Background technology

When carrying out box beam torsion test, it is necessary to apply the test load of contrary at the two ends of box beam；Existing loading arm Device, can not provide overload protection when in use, and misoperation easily makes the end conquassation of box beam, influence experiment；In loading arm There is unreasonable part in the structure design of device, be mainly reflected in that structural strength is inadequate, the size of the arm of force can not be adjusted, to examination Testing operation makes troubles.

Utility model content

The purpose of this utility model is that there is provided a kind of reasonable in design, structure for problems of the prior art The box beam torsion test device that intensity is high, can avoid the conquassation of box beam end, be conveniently adjusted arm of force size.

The technical solution adopted in the utility model is to achieve the above object：

A kind of box beam torsion test device, including be clamped in box beam two ends and the loading arm of action direction contrary, be supported on Movable bearing support below loading arm, the dead load acted on by live loaded leg on loading arm, which decompose beam, acts on dead load decomposes Dead load instrument above beam, the detecting instrument acted in box beam, bottom plate that the loading arm includes being supported on movable bearing support, Lengthening loading plate above bottom plate, it is removably attachable to bottom plate and lengthens the high-strength bolt nut group between loading plate Part, the high-strength bolt nut assembly is located at the both sides of box beam length direction and in high-strength bolt nut assembly and box beam Between be clamped with protective baffle plate, two are provided with above the lengthening loading plate and is set up in parallel and the rail isometric with lengthening loading plate Road backplate, the live loaded leg is acted between two track backplates；

Further, the detecting instrument include bridge static data Acquisition Instrument, fracture width synthetical collection instrument, grating scale and Deformeter；

Further, multiple corresponding bolts hole are set on the bottom plate and lengthening loading plate；So it is easy to regulation, can be with The change of different dimensions box beams is adapted to, makes operation easier；

Further, the live loaded leg include be located at dead load decompose beam below active column, be entrenched in active column The movable disc seat of bottom；Movable disc seat is located between track backplate, by adjusting movable disc seat on track backplate Relative position, realizes the regulation of arm of force size.

The beneficial effects of the utility model are：

Loading arm of the present utility model will be kidnapped using bottom plate and lengthening loading plate above and below box beam, and pass through high-strength bolt Nut assembly is attached fixation, then by the front and rear clamping of protective baffle plate, protective baffle plate can limit bottom plate and lengthen loading plate Between clamp distance, effectively protection box beam end, it is to avoid because misoperation by conquassation destroy；Meanwhile, live loaded Leg can be slided between track backplate, beneficial to the size of the regulation arm of force；Track backplate plays spacing effect, adds while it is also acted as Force the effect of long carrying plate structure intensity, make the overall stress of loading arm more stable, add the service life of loading arm.

Brief description of the drawings

Fig. 1 is structural representation of the present utility model.

Wherein：1- box beams；2- loading arms；3- movable bearing supports；4- live loaded legs；5- dead loads decompose beam；6- dead load instrument；7- Bottom plate；8- lengthens loading plate；9- high-strength bolt nut assemblies；10- protective baffle plates；11- track backplates；12- bridge static numbers According to Acquisition Instrument；13- fracture width synthetical collection instrument；14- grating scales；15- deformeters；16- bolts hole；17- active columns；18- Movable disc seat.

Embodiment

The utility model preferred embodiment is illustrated below in conjunction with accompanying drawing：

As shown in figure 1, a kind of box beam torsion test device, including be clamped in the two ends of box beam 1 and action direction contrary plus Load arm 2, the movable bearing support 3 for being supported on the lower section of loading arm 2, the dead load acted on by live loaded leg 4 on loading arm 2 decompose beam 5th, the dead load instrument 6 that dead load decomposes the top of beam 5, the detecting instrument acted in box beam 1 are acted on, the loading arm 2 includes being propped up Support bottom plate 7 on movable bearing support 3, the lengthening loading plate 8 positioned at the top of bottom plate 7, be removably attachable to bottom plate 7 and lengthening is held High-strength bolt nut assembly 9 between support plate 8, the high-strength bolt nut assembly 9 is located at the two of the length direction of box beam 1 Side and protective baffle plate 10 is clamped between high-strength bolt nut assembly 9 and box beam 1, the top of lengthening loading plate 8 is set There are two to be set up in parallel and the track backplate 11 isometric with lengthening loading plate 8, the live loaded leg 4 acts on two rails Between road backplate 11；

In the utility model：Dead load instrument 6 can use hydraulic jack, or gate-type forcing press, openside press, Beam 5 is decomposed to dead load from top and applies pressure；Dead load decomposes beam 5 and is located at the top of box beam 1, span centre the two of the length direction of box beam 1 Side；Live loaded leg 4 can be fixedly installed on dead load and decompose beam 5 two ends, removably mode can also be fixed, using can The mode of dismounting is easy to the regulation of the arm of force；Movable bearing support 3 is supported as end, can avoid any axial constraint, and box beam 1 is being applied Plus can FREE TORSION during moment of torsion；Lengthening loading plate 8 on loading arm 2 is set up in parallel and isometric with lengthening loading plate 8 by two Track backplate 11 carry out reinforcement, the length for lengthening loading plate 8 can be increased, increase torque arm length, two tracks shield Plate 11 also acts as the effect spacing to the active position of live loaded leg 4, while being also beneficial to the regulation of the arm of force, protective baffle plate 10 and case Beam 1 is contour, between the gap for being clamped in high-strength bolt nut assembly 9 and box beam 1, the end of box beam is encircled on four sides, Box beam 1 can be protected in misoperation, because protective baffle plate 10 is clamping shape, there is certain gap, the gap is that box beam 1 is turned round Change shape and provide necessary surplus；

The detecting instrument includes bridge static data Acquisition Instrument 12, fracture width synthetical collection instrument 13, the and of grating scale 14 Deformeter 15；

In the utility model：Bridge static data Acquisition Instrument 12, fracture width synthetical collection instrument 13 and grating scale 14 are equal The middle part of box beam 1 is acted on, deformeter 15 acts on one end of box beam 1；

Multiple corresponding bolts hole 16 are set on the bottom plate 7 and lengthening loading plate 8；

In the utility model：Because box beam 1 has different test specifications, therefore multiple corresponding bolts hole are set 16 are easy to adjust the clamping spacing of high-strength bolt nut assembly 9；Loading arm 2 can be made to adapt to the box beam 1 of different dimensions；

The live loaded leg 4 includes being located at the active column 17 of the lower section of dead load decomposition beam 5, is entrenched in the bottom of active column 17 The movable disc seat 18 at end；

In the utility model：The lower end of active column 17 is preferably dome shape and is fitted together to cooperation with movable disc seat 18, Movable disc seat 18 can be avoided and other restraining forces between loading plate 8 are lengthened, be that torque arm length is fixed, increase testing result Accuracy, its be beneficial to increase apply moment of torsion effect when integrally-built stability.

The course of work of the present utility model：

The box beam 1 of single box single chamber to be measured is installed into fixation, is further applied load by dead load instrument 6, beam 5 is decomposed by its turn by dead load Move to live loaded leg 4 and act on the two ends of loading arm 2, the two ends of box beam 1 is produced the opposite moment of torsion of both direction, deformeter Whether the area in 15 detection cross sections changes（If deformeter detection box beam cross section, which changes, illustrates that shear stress is sent out Changing, the failure of an experiment, on the contrary continue to test）.After reversing fully（The load that this stage dead load instrument 6 applies is remained not Become, i.e., the shear stress on the cross section of box beam 1 is a steady state value）.Strained with the measuring tank beam of bridge static data Acquisition Instrument 12, grating scale 14 survey its amount of deflection, and fracture width comprehensive detector 13 surveys its fracture width, and finally unloading, disposal data are compared.

Finally it should be noted that：The preferred embodiment of utility model is the foregoing is only, practicality is not limited to It is new, although utility model is described in detail with reference to the foregoing embodiments, for those skilled in the art, its The technical scheme described in foregoing embodiments can still be modified, or which part technical characteristic is equal Replace.All spirit in utility model is with principle, and any modification, equivalent substitution and improvements made etc. should be included in reality Within new protection domain.

Claims

1. a kind of box beam torsion test device, including it is clamped in box beam（1）Two ends and the loading arm of action direction contrary（2）, branch Support is in loading arm（2）The movable bearing support of lower section（3）, pass through live loaded leg（4）Act on loading arm（2）On dead load decompose beam （5）, act on dead load decompose beam（5）The dead load instrument of top（6）, act on box beam（1）On detecting instrument, it is characterised in that： The loading arm（2）Including being supported on movable bearing support（3）On bottom plate（7）, positioned at bottom plate（7）The lengthening loading plate of top （8）, be removably attachable to bottom plate（7）With lengthening loading plate（8）Between high-strength bolt nut assembly（9）, it is described high-strength Spend bolt and nut component（9）Positioned at box beam（1）Both sides of length direction and in high-strength bolt nut assembly（9）And box beam（1） Between be clamped with protective baffle plate（10）, the lengthening loading plate（8）Top is provided with two and is set up in parallel and with lengthening loading plate （8）Isometric track backplate（11）, the live loaded leg（4）Act on two track backplates（11）Between.

2. a kind of box beam torsion test device as claimed in claim 1, it is characterised in that：It is quiet that the detecting instrument includes bridge State data collecting instrument（12）, fracture width synthetical collection instrument（13）, grating scale（14）And deformeter（15）.

3. a kind of box beam torsion test device as claimed in claim 1, it is characterised in that：The bottom plate（7）Carried with lengthening Plate（8）It is upper that multiple corresponding bolts hole are set（16）.

4. a kind of box beam torsion test device as claimed in claim 1, it is characterised in that：The live loaded leg（4）Including Beam is decomposed positioned at dead load（5）The active column of lower section（17）, be entrenched in active column（17）The movable disc seat of bottom（18）.