CN214373982U - Concrete beam multipoint bending test device - Google Patents
Concrete beam multipoint bending test device Download PDFInfo
- Publication number
- CN214373982U CN214373982U CN202120410986.5U CN202120410986U CN214373982U CN 214373982 U CN214373982 U CN 214373982U CN 202120410986 U CN202120410986 U CN 202120410986U CN 214373982 U CN214373982 U CN 214373982U
- Authority
- CN
- China
- Prior art keywords
- loading
- bending test
- shaped steel
- concrete beam
- groove
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The utility model discloses a concrete beam multiple spot bending test device, including bearing type steelframe, loading connecting seat, a plurality of shaped steel draw-in grooves, a plurality of round pillar and a plurality of combination beam test piece, a plurality of shaped steel draw-in grooves fall into a plurality of groups, and a plurality of groups shaped steel draw-in grooves distribute in proper order bearing type steel frame top, every group include two relative parallel arrangement's shaped steel draw-in groove, and symmetrical connection has two round pillar and constitutes the fulcrum platform mutually between the shaped steel draw-in groove of every group, installs the combination beam test piece between the adjacent fulcrum platform, and the both ends of round pillar on the fulcrum platform far away from bearing type steel frame are connected to the loading connecting seat, bear a plurality of loading weights on the loading connecting seat. The utility model discloses can carry out the loading of different load grades to polylith reinforced concrete slab or steel-concrete composite board simultaneously, avoid under the same experimental environment to a plurality of experimental components loaded problem respectively for experimental loading is more convenient. Meanwhile, the consistency of the loading environments of a plurality of test components is ensured, so that the test data is more accurate.
Description
Technical Field
The utility model relates to a concrete member test device field, concretely relates to concrete beam multiple spot bending test device.
Background
The reinforced concrete structure uses the steel bar with high strength and good performance, which can improve the stress performance of the member, improve the use function of the member, facilitate the expansion of the structural design method, save materials and have very obvious economic benefit. Creep is the phenomenon that the deformation of concrete increases with the duration of the load under the action of constant continuous load. The concrete creep is usually 1-3 times of instantaneous deformation, and the concrete creep can cause stress redistribution between two materials, namely the steel bar and the concrete with the same section of the member. Therefore, creep has a very important influence on the safety and usability of concrete structures. In order to reduce the cost and improve the strength of concrete, mineral admixtures such as silica fume, slag and fly ash are often added into the concrete, and the addition of the mineral admixtures can change the internal structure of the concrete material, thereby influencing the creep amount of the concrete in corresponding loading time. As the creep effect of the steel is smaller than that of the concrete and can be ignored, the steel bar can resist the deformation generated by the concrete through the shear force transmission, so that the stress change in the concrete structure is transferred to the steel, and the stress inside the combined structure is redistributed. Because the single concrete uniaxial tension and compressive creep are obviously different from the actual stress creep of the reinforced concrete slab, in order to accurately reflect the performance of the reinforced concrete slab under the actual working condition, a multipoint bending test needs to be carried out on the reinforced concrete slab. However, the existing common concrete beam testing equipment mainly has the following defects:
(1) the testing device occupies a large area and needs special loading devices such as an oil pump, a jack and the like;
(2) the traditional loading mode has large deformation in the early loading stage, and needs to arrange a specially-assigned person for monitoring to carry out load compensation, so that the data accuracy is poor;
(3) when the beam body is placed, the fulcrum is not fixed, so that the position of the fulcrum cannot be unchanged after the test piece is placed, and the test precision is influenced;
(4) the testing device can only measure a single concrete beam, and when creep testing needs to be carried out on mass concrete beams, the testing needs to be carried out in a graded mode, the testing workload is large, and the testing environment in which the testing device is located cannot be guaranteed to be completely consistent.
Present creep device is all to simply support the concrete beam board, lacks the multiple spot bending test device to the concrete beam board, in order to obtain more accurate concrete creep test result, is necessary utility model one kind can carry out the loading and need not the testing arrangement of special person on duty to polylith reinforced concrete slab simultaneously.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a concrete beam multiple spot bending test device can carry out the loading of different load grades to polylith reinforced concrete board or steel-concrete composite board simultaneously, can avoid under the same test environment to a plurality of test component loaded problem respectively for experimental loading is more convenient, with the technical problem who mentions in the solution background art.
The purpose of the utility model is realized through the following technical scheme:
the utility model provides a concrete beam multiple spot bending test device, is including bearing type steelframe, loading connecting seat, a plurality of shaped steel draw-in groove, a plurality of circular pillar and a plurality of combination beam test piece, and is a plurality of the shaped steel draw-in groove falls into a plurality of groups, and a plurality of groups the shaped steel draw-in groove distributes in proper order bearing type steel frame top, every group includes two relative parallel arrangement's shaped steel draw-in groove, every group shaped steel draw-in groove between symmetric connection have two circular pillar and constitute the fulcrum platform mutually, adjacent install between the fulcrum platform combination beam test piece, the loading connecting seat is connected and is kept away from the both ends of the circular pillar on the farthest fulcrum platform of bearing type steelframe, bear a plurality of loading weights on the loading connecting seat.
The utility model discloses be provided with multilayer fulcrum platform above the loaded shaped steel frame, connect through round pillar between the shaped steel draw-in groove of the fulcrum platform on every layer, the combination beam test piece that awaits measuring carries on between the round pillar on every layer, all carry on the combination beam that awaits measuring on each layer multilayer fulcrum platform of loaded shaped steel frame top, connect the loading connecting seat from the both ends of the round pillar on the farthest fulcrum platform of loaded shaped steel frame, place a plurality of weights on the loading connecting seat to realize multistage loading.
Further, the loaded steel frame comprises a bottom frame and vertical frames, and the vertical frames are installed at two ends of the bottom frame.
The beneficial effects of the preferred embodiment are as follows: the loaded steel frame is formed by connecting a vertical frame and an underframe, and the stability of the whole device in the load loading process can be ensured.
Further, the length of the section steel clamping groove is matched with the length of the vertical frame.
The beneficial effects of the preferred embodiment are as follows: the length of erecting the frame has multiple selection, specifically matches according to the length of shaped steel draw-in groove for this testing arrangement can be applicable to the test piece of different length and form, has reduced test cost.
Further, the shaped steel draw-in groove includes that shaped steel body and a plurality of are seted up the mounting hole on the shaped steel body.
The beneficial effects of the preferred embodiment are as follows: a plurality of mounting holes of seting up on the shaped steel body conveniently pass the mounting hole with round pillar and connect into the fulcrum platform with the shaped steel draw-in groove, and a plurality of evenly distributed's mounting hole for the distance between two round pillars on the same floor fulcrum platform is adjustable.
Furthermore, the loading connecting seat comprises a bearing plate and two loading connecting rods, one end of each loading connecting rod is connected with the bearing plate, and the other end of each loading connecting rod is provided with a hanging hole.
The beneficial effects of the preferred embodiment are as follows: the two loading connecting rods are respectively connected to two ends of the circular support, and the bearing plate is used for bearing the weight.
Further, the hanging hole is matched with the circular support column for installation.
The beneficial effects of the preferred embodiment are as follows: the loading connecting rod is matched with the circular support column through a hanging hole of the loading connecting rod.
Further, a plurality of the loading weights are placed on the support tray.
The beneficial effects of the preferred embodiment are as follows: and the loading weights are symmetrically placed one by one on the bearing tray to complete the loading process.
Further, the circular pillar comprises a pillar body and notches arranged at two ends of the pillar body, and the mounting hole is matched with the notches.
The beneficial effects of the preferred embodiment are as follows: the notches at the two ends of the strut body are tightly connected with the mounting holes on the section steel body to form a stable rectangular fulcrum weekday. The movement of the cylindrical fulcrum is avoided, and the position of the fulcrum is kept unchanged in the test piece mounting process.
Further, the number of the notches at the two ends of the strut body is 2.
The beneficial effects of the preferred embodiment are as follows: the quantity of the notches at the two ends of the strut body is 2, and the distance between the two profile steel clamping grooves on the same-layer fulcrum platform can be adjusted.
Further, the combination beam test piece is carried between the two circular pillars of the fulcrum platform.
The beneficial effects of the preferred embodiment are as follows: the test piece of the combined beam to be tested is carried between the two circular supporting columns of the fulcrum platform, and the two circular supporting columns can play a role in stably supporting the test piece of the combined beam. The reinforced concrete composite beam test piece is placed on a fulcrum platform consisting of the section steel clamping groove and the circular supporting column, the loading platform cannot slide left and right under the action of the notch, the test piece cannot slide to cause dropping, and the safety in the test piece installation process can be guaranteed.
The utility model has the advantages that:
1) the utility model is provided with a plurality of layers of fulcrum platforms above the loaded steel frame, the section steel slots of each layer of fulcrum platform are connected through the circular support columns, the combined beam test piece to be tested is carried between the circular support columns of each layer, the multi-layer fulcrum platforms on each layer above the loaded steel frame are all provided with a combination beam to be tested, two ends of a circular support on the fulcrum platform farthest from the loaded steel frame are connected with loading connecting seats, a plurality of weights are placed on the loading connecting seats so as to realize multi-level loading, after the load is applied to the top, the load is transmitted through the fulcrums of the fulcrum platforms of each layer, the load of each fulcrum can be obtained according to the corresponding calculation formula of the continuous beam, the load is clear in size, the multi-point bending test device can meet the use requirements of multi-point bending tests of all reinforced concrete slabs and concrete beams, the loading and measuring processes are convenient and quick, the precision of measured data is high, and meanwhile the safety requirement is met.
2) The utility model discloses can carry out the loading to polylith reinforced concrete board simultaneously, avoid polylith reinforced concrete board loaded problem respectively under the same test condition for experimental loading is more convenient. Meanwhile, the applied load is stable and is not influenced by the shrinkage and creep of the concrete, and the obtained test data is more accurate. A plurality of fulcrums can be accurately placed according to test requirements by utilizing the profile steel clamping groove, and only the corresponding profile steel clamping groove needs to be replaced when the test changes, so that the universality of the test device is improved, the safety of the loading process is ensured, and the test cost is reduced.
Drawings
FIG. 1 is a schematic view of the overall structure of the multi-point bending test device for concrete beams of the present invention;
FIG. 2 is a schematic view of the mounting structure between the loading connection seat, the section steel slot and the circular pillar of the present invention;
FIG. 3 is a schematic structural view of a section steel slot of the present invention;
fig. 4 is a schematic structural view of the loading connection seat of the present invention;
FIG. 5 is a schematic structural view of a circular pillar according to the present invention;
in the figure, 1-loaded steel frame, 101-underframe, 102-vertical frame, 2-loading connecting seat, 201-bearing tray, 202-loading connecting rod, 203-hanging hole, 3-section steel clamping groove, 301-section steel body, 302-mounting hole, 4-circular support, 401-support body, 402-notch, 5-composite beam test piece and 6-loading weight.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention.
Example 1
Referring to fig. 1-5, the present invention provides a technical solution:
referring to fig. 1-2, a concrete beam multipoint bending test device includes a loaded steel frame 1, a loading connection seat 2, a plurality of profile steel slots 3, a plurality of circular pillars 4 and a plurality of combined beam test pieces 5, wherein the plurality of profile steel slots 3 are divided into a plurality of groups, the plurality of groups of profile steel slots 3 are sequentially distributed above the loaded steel frame 1, each group includes two profile steel slots 3 arranged in parallel relatively, two circular pillars 4 are symmetrically connected between the profile steel slots 3 of each group and mutually constitute fulcrum platforms, the combined beam test pieces 5 are installed between adjacent fulcrum platforms, the loading connection seat 2 is connected to two ends of the circular pillar 4 on the fulcrum platform farthest from the loaded steel frame 1, and the loading connection seat 2 bears a plurality of loading weights 6.
In this embodiment, be provided with multilayer fulcrum platform above the type steelframe of bearing load 1, connect through circular pillar 4 between the shaped steel draw-in groove 3 of the fulcrum platform on every layer, the combination beam test piece 5 of awaiting measuring carries on between circular pillar 4 on every layer, all carry the combination beam of awaiting measuring on each layer multilayer fulcrum platform of type steelframe of bearing load 1 top, load connecting seat 2 is connected at the both ends of circular pillar 4 on the fulcrum platform farthest away from type steelframe of bearing load 1, place a plurality of weights on the load connecting seat 2, so as to realize multistage loading.
The concrete beam multipoint bending test device is simple in structure and reasonable in stress, loads are transmitted through fulcrums of all layers of fulcrum platforms after the loads are applied to the top, the loads of all the fulcrums can be obtained according to corresponding calculation formulas of continuous beams, the loads are clear in size, the use of all reinforced concrete slabs and concrete beam multipoint bending tests can be met, the loading and measuring processes are convenient and fast, the precision of measured data is high, and the requirement for safety is met.
Referring to fig. 1, the loaded steel frame 1 includes a bottom frame 101 and vertical frames 102, and the vertical frames 102 are installed at two ends of the bottom frame 101.
In this embodiment, the loaded steel frame 1 is formed by connecting the vertical frame 102 and the bottom frame 101, so as to ensure the stability of the whole device in the process of loading the load.
Referring to fig. 3, the length of the section steel slot 3 matches the length of the vertical frame 102.
In this embodiment, there are multiple choices in the length of vertical frame 102, specifically match according to the length of shaped steel draw-in groove 3 for this testing arrangement can be applicable to the test piece of different length and form, has reduced experimental cost.
Referring to fig. 3, the section steel clamping groove 3 includes a section steel body 301 and a plurality of mounting holes 302 formed in the section steel body 301.
In this embodiment, a plurality of mounting holes 302 formed in the profile steel body 301 facilitate the round pillars 4 to pass through the mounting holes 302 to connect the profile steel clamping grooves 3 into a fulcrum platform, and the mounting holes 302 are uniformly distributed, so that the distance between two round pillars 4 on the same layer of fulcrum platform is adjustable.
Referring to fig. 4, the loading connector holder 2 includes a supporting tray 201 and two loading links 202, one end of each loading link 202 is connected to the supporting tray 201, and the other end of each loading link 202 is provided with a hanging hole 203.
In this embodiment, two loading rods 202 are respectively connected to two ends of the circular pillar 4, and the supporting tray 201 is used for supporting the weight.
Referring to fig. 4, the hanging hole 203 is installed to match with the circular pillar 4.
In this embodiment, the load link 202 is mounted to the circular support 4 through its hanging hole 203.
Referring to fig. 2, a plurality of loading weights 6 are placed on the support tray 201.
In this embodiment, the loading weights 6 are symmetrically placed one by one on the support tray 201 to complete the loading process.
Referring to fig. 3, the circular pillar 4 includes a pillar body 401 and notches 402 formed at both ends of the pillar body 401, and the mounting holes 302 are engaged with the notches 402.
In this embodiment, the notches 402 at the two ends of the pillar body 401 are tightly connected with the mounting holes 302 on the section steel body 301, so as to form a stable rectangular fulcrum weekday. The movement of the cylindrical fulcrum is avoided, and the position of the fulcrum is kept unchanged in the test piece mounting process.
Referring to fig. 5, the number of the notches 402 at both ends of the pillar body 401 is 2.
In this embodiment, the number of the notches 402 at both ends of the pillar body 401 is 2, and the distance between the two profile steel slots 3 on the same-layer fulcrum platform can be adjusted.
Referring to fig. 1-2, the composite beam test piece 5 is mounted between two circular pillars 4 of the fulcrum platform.
In this embodiment, the composite beam test piece 5 to be tested is mounted between the two circular pillars 4 of the fulcrum platform, and the two circular pillars 4 can play a role in stably supporting the composite beam test piece 5. The reinforced concrete composite beam test piece 5 is placed on a fulcrum platform consisting of the section steel clamping groove 3 and the circular support column 4, the loading platform cannot slide left and right under the action of the notch 402, the test piece cannot slide and fall off, and safety in the test piece installation process can be guaranteed.
The utility model can adopt the assembly auxiliary device and the section steel clamping groove 3 with the mounting hole 302 to set the supporting point, the arrangement of the supporting point position is accurate, the problem that the supporting point position is not easy to be accurately arranged in the test process is reduced, and the test complexity is reduced; the position of the fulcrum can be adjusted by replacing the section steel clamping groove 3 according to the requirements of the test member, so that the device is suitable for test pieces with different lengths and forms, and the test cost is reduced; the problem of uneven stress of the combined beam test piece 5 caused by the movement of the fulcrum cannot be caused in the loading process, and the test load condition is more consistent with the theoretical condition; the loading device does not need special equipment such as a jack, the maximum load is controlled by the number of weights, the limitation of the size of the jack on the maximum load of the loading device is reduced, the load level applied by the device is higher, and the device can be used for testing beams with higher bending strength such as reinforced concrete slabs; the load is changed from loading of special loading equipment to weight loading, the loading is simple and convenient, the load is stable, and the cost of the whole device is reduced; the loading device can be made of high-strength steel, so that the deviation caused by deformation of the testing device is reduced; the loading connecting rod 202 can be accurately centered, so that the influence of load eccentricity on test accuracy is avoided, and meanwhile, the safety problems of beam body overturning and the like caused by the load eccentricity can also be avoided.
The foregoing is illustrative of the preferred embodiments of the present invention, and it is to be understood that the invention is not limited to the precise forms disclosed herein, and that various other combinations, modifications, and environments may be resorted to, falling within the scope of the invention as defined by the appended claims. But that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention, which is to be limited only by the claims appended hereto.
Claims (10)
1. The utility model provides a concrete beam multiple spot bending test device which characterized in that: including bearing type steelframe (1), loading connecting seat (2), a plurality of shaped steel draw-in groove (3), a plurality of circular pillar (4) and a plurality of combination beam test piece (5), it is a plurality of shaped steel draw-in groove (3) divide into a plurality of groups, a plurality of groups shaped steel draw-in groove (3) distribute gradually bearing type steelframe (1) top, every group includes two relative parallel arrangement's shaped steel draw-in groove (3), every group shaped steel draw-in groove (3) between the symmetric connection have two circular pillar (4) and constitute the fulcrum platform mutually, adjacent install between the fulcrum platform combination beam test piece (5), loading connecting seat (2) are connected and are kept away from the both ends of circular pillar (4) on the fulcrum platform that bears type steelframe (1) the farthest, bear a plurality of loading weights (6) on loading connecting seat (2).
2. The concrete beam multipoint bending test apparatus of claim 1, wherein: the loaded steel frame (1) comprises an underframe (101) and vertical frames (102), wherein the vertical frames (102) are installed at two ends of the underframe (101).
3. The concrete beam multipoint bending test apparatus of claim 2, wherein: the length of the section steel clamping groove (3) is matched with that of the vertical frame (102).
4. The concrete beam multipoint bending test apparatus of claim 1, wherein: the section steel clamping groove (3) comprises a section steel body (301) and a plurality of mounting holes (302) formed in the section steel body (301).
5. The concrete beam multipoint bending test apparatus of claim 1, wherein: the loading connecting seat (2) comprises a bearing tray (201) and two loading connecting rods (202), one end of each loading connecting rod (202) is connected with the bearing tray (201), and the other end of each loading connecting rod (202) is provided with a hanging hole (203).
6. The concrete beam multipoint bending test apparatus of claim 5, wherein: the hanging hole (203) is matched with the circular support column (4).
7. The concrete beam multipoint bending test apparatus of claim 5, wherein: a plurality of loading weights (6) are placed on the support plate (201).
8. The concrete beam multipoint bending test apparatus of claim 4, wherein: the circular support column (4) comprises a support column body (401) and notches (402) arranged at two ends of the support column body (401), and the mounting hole (302) is matched with the notches (402).
9. The concrete beam multipoint bending test apparatus of claim 8, wherein: the number of the notches (402) at the two ends of the strut body (401) is 2.
10. The concrete beam multipoint bending test apparatus of claim 1, wherein: the combined beam test piece (5) is arranged between the two circular pillars (4) of the fulcrum platform in a carrying mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120410986.5U CN214373982U (en) | 2021-02-25 | 2021-02-25 | Concrete beam multipoint bending test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120410986.5U CN214373982U (en) | 2021-02-25 | 2021-02-25 | Concrete beam multipoint bending test device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214373982U true CN214373982U (en) | 2021-10-08 |
Family
ID=77966389
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120410986.5U Active CN214373982U (en) | 2021-02-25 | 2021-02-25 | Concrete beam multipoint bending test device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214373982U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112858040A (en) * | 2021-02-25 | 2021-05-28 | 西南交通大学 | Concrete beam multipoint bending test device |
-
2021
- 2021-02-25 CN CN202120410986.5U patent/CN214373982U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112858040A (en) * | 2021-02-25 | 2021-05-28 | 西南交通大学 | Concrete beam multipoint bending test device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN214373982U (en) | Concrete beam multipoint bending test device | |
| CN106680090B (en) | Testing device and testing method for stable bearing capacity of angle steel crossed diagonal material | |
| CN106153314A (en) | A kind of plane framework node loads and node area detrusion measurement apparatus | |
| CN104749047B (en) | A kind of flexural member Mechanics Performance Testing device and its application method | |
| CN108489748B (en) | A kind of experimental rig and test method for continuous bridge long period Study of Cyclic Loading | |
| CN109737168B (en) | Quasi-zero stiffness vibration isolator | |
| CN206292121U (en) | One kind is multi-functional to mount strength test device | |
| CN108824210B (en) | Prepressing method of bridge support | |
| CN107238529A (en) | A kind of precast concrete test device for multifunctional and installation method | |
| CN113335560A (en) | Complicated load box section or barrel section testing device and method | |
| CN112179788A (en) | Pure torque loading device and method based on lever principle | |
| CN112858040A (en) | Concrete beam multipoint bending test device | |
| CN113029802B (en) | High-precision testing method for equivalent elastic statics parameters of dot matrix material | |
| CN113138071A (en) | Test device for applying bidirectional compression load | |
| CN104596859A (en) | Testing device for bearing capacity of precast reinforced concrete slab | |
| CN111175065B (en) | On-spot multidirectional power detection device of assembly type structure envelope connected system | |
| CN208076290U (en) | A kind of device applying prestressing force and pull-out test | |
| CN204405442U (en) | A kind of reinforced concrete prefabricated board testing device for bearing capacity | |
| CN207066853U (en) | A kind of precast concrete test device for multifunctional | |
| CN111122043A (en) | Device for supporting seat counter force test and test system comprising device | |
| CN203037523U (en) | Adjustable bending test base | |
| CN115060480A (en) | Universal damping device test platform and control system | |
| CN210391596U (en) | Suspension system of flexible solar cell wing extension mechanism | |
| CN202452925U (en) | High-precision measurement structure of jacking displacement amount in non-electric-hydraulic-control building jacking engineering | |
| CN214093838U (en) | Displacement meter quick fixing device for field detection |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |