CN204882267U - Testing arrangement that twists reverse who creeps is cuted to concrete - Google Patents
Testing arrangement that twists reverse who creeps is cuted to concrete Download PDFInfo
- Publication number
- CN204882267U CN204882267U CN201520699503.2U CN201520699503U CN204882267U CN 204882267 U CN204882267 U CN 204882267U CN 201520699503 U CN201520699503 U CN 201520699503U CN 204882267 U CN204882267 U CN 204882267U
- Authority
- CN
- China
- Prior art keywords
- concrete
- reinforcing bar
- bar
- power transmission
- model
- 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
Landscapes
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The utility model discloses a testing arrangement that twists reverse who creeps is cuted to concrete, including the concrete base, the cylindrical concrete round bar of vertical setting is pour at concrete base center, installs the support steelframe on the concrete base, at present adopt the beam type loading to come to test the shear effect of concrete usually, the utility model provides a be used for testing the method of creeping of shearing through exerting the concrete cylinder to reverse. Testing arrangement exerts two pairs of concentrated forces through the steel tendon and is used in the bottom and solidifies at subaerial cylinder concrete peripherally, forms moment of torsion shear effect. Steel tendon one end is suspended in midair has the steel bracket that loads the concrete piece to form the load to through concreteing the device that turns to that forms braced system and steel tendon at subaerial support steelframe in the bottom, and come the test to be located the displacement of the spacer bar on the concrete cylinder and then the shearing of calculating the concrete is crept through the displacement meter.
Description
[technical field]
The utility model belongs to concrete creep test technical field, relates to the torsion proving installation that a kind of concrete shearing is crept.
[background technology]
Normally obtain based on the experimental study under simple stress condition about the Creep Coefficient in concrete creep theory at present, some creep models based on extensively research and test are before as B3 model, CEB-FIP model, the ACI-209R model fairly comprehensive consideration many factors such as concrete strength, cement type, relative humidity, but the stress condition of its test is axial compression stress state, the B4 model of up-to-date proposition creep that part is consistent with B3 model still adopts axial stress state, just perfect factor of shrinking consideration.And about creep test research concrete under shear action seldom.The time deformation only supposing under various internal force can be taken a unified Creep Coefficient approx and be obtained, and namely supposes that the Creep Coefficient under shear action is identical with the Creep Coefficient under axial force or flecition.And the displacement of creeping that research produces under finding shear action be can not ignore, needing creeps to concrete shearing carries out independent test.
[utility model content]
The purpose of this utility model is the shortcoming overcoming above-mentioned prior art, the torsion proving installation that a kind of concrete shearing is crept is provided, this device makes concrete shearing creep effects can quantize to consider, to solve in current engineering because the mechanism problem of TERM DEFORMATION that causes of shear creep, for the prediction of xoncrete structure distortion and calculating provide reference.
For achieving the above object, the utility model is achieved by the following technical solutions:
The torsion proving installation that concrete shearing is crept, comprises concrete bed, and the cylindrical concrete round bar vertically arranged is built at concrete bed center, and concrete bed is provided with supporting steel frame; Concrete round bar top is provided with power transmission reinforcing bar, load bracket intermediate openings, and is set in from top to bottom on concrete round bar, and is lifted on supporting steel frame by steel strand wires; Steel strand wires one end is connected with load bracket, and the other end is connected on power transmission reinforcing bar.
The utility model further improves and is:
Described supporting steel frame is bolted on concrete bed.
The top of described supporting steel frame is provided with and turns to steel tank, and steel strand wires are connected on power transmission reinforcing bar after turning to steel tank.
Described power transmission reinforcing bar is the reinforcing bar that two right-angled intersections are arranged in concrete round bar, and the side of concrete round bar is stretched out at the two ends of two reinforcing bars respectively.
The below of described power transmission reinforcing bar is provided with spacer bar, by change in displacement and then the reckoning shear creep of displacement meter measurement and positioning reinforcing bar.
Compared with prior art, the utility model has following beneficial effect:
The load that the utility model is produced by the concrete block that the supporting steel frame transmission that bolt is cemented on concrete bed is loaded on steel bracket by steel tendon and bottom, and be cemented in bottom on the concrete cylindrical on concrete bed and form torsional shear effect, the mode of the spacer bar displacement be positioned on concrete cylindrical by clock gauge test is gathered to be reversed the distortion produced and calculates shear creep.Compared to the test of traditional beam type shearing test, this proving installation only has torsional shear effect, without the impact of other factors such as moment of flexure, can test accurately concrete shear creep.
[accompanying drawing explanation]
Fig. 1 is the structural representation of the utility model concrete round bar and concrete bed;
Fig. 2 is the structural representation of the utility model supporting steel frame;
Fig. 3 is the structural representation of the utility model load bracket;
Fig. 4 is the position view of the utility model power transmission reinforcing bar and spacer bar;
Fig. 5 is one-piece construction schematic diagram of the present utility model.
Wherein: 1 is concrete bed; 2 is concrete round bar; 3 is supporting steel frame; 4 is bolt; 5 is load bracket; 6 is power transmission reinforcing bar; 7 is spacer bar; 8 is steel strand wires; 9 for turning to steel tank.
[embodiment]
Below in conjunction with accompanying drawing, the utility model is described in further detail:
See Fig. 1 to Fig. 5, the torsion proving installation that the utility model concrete shearing is crept, comprises concrete bed 1, and the cylindrical concrete round bar 2 vertically arranged is built at concrete bed 1 center, concrete bed 1 is provided with supporting steel frame 3; Concrete round bar 2 top is provided with power transmission reinforcing bar 6, load bracket 5 intermediate openings, and is set in from top to bottom on concrete round bar 2, and is lifted on supporting steel frame 3 by steel strand wires 8; Steel strand wires one end is connected with load bracket 5, and the other end is connected on power transmission reinforcing bar 6.Supporting steel frame 3 is fixed on concrete bed 1 by bolt 4.The top of supporting steel frame 3 is provided with and turns to steel tank 9, and steel strand wires 8 are connected on power transmission reinforcing bar 6 after turning to steel tank 9.Power transmission reinforcing bar 6 is the reinforcing bar that two right-angled intersections are arranged in concrete round bar 2, and the side of concrete round bar 2 is stretched out at the two ends of two reinforcing bars respectively.The below of power transmission reinforcing bar 6 is provided with spacer bar 7, by change in displacement and then the reckoning shear creep of displacement meter measurement and positioning reinforcing bar 7.
Shear creep proving installation involved by the utility model is cemented in the concrete cylindrical on concrete bed by lower end, lower end is cemented in the supporting steel frame on concrete bed by bolt, steel bracket, steel tendon, clock gauge, and concrete loading blocks forms.Shear creep component is as right cylinder concrete round bar 2 in Fig. 1, it is consolidated in when building making on concrete bed 1, supporting steel frame 3 in Fig. 2 is by high-strength bolt 4 and concrete bed 1 consolidation, the steel strand wires 8 of the power transmission reinforcing bar 6 connected in the diagram by one end for the load bracket 5 loading load block in Fig. 3 are hung in supporting steel frame 3, the Action of Gravity Field of load block is converted to the moment of torsion acted on test component by the steering-effecting of supporting steel frame, thus pure shear effect is formed to right cylinder concrete circular bar, by change in displacement and then the reckoning shear creep of spacer bar 7 in displacement meter survey sheet 4.
The utility model object is by the shear strain of the medium straight concrete cylindrical of long-term observation shear test under pure shear, thus calculates shear creep computation schema, for Bridge Design provides the theoretical reference considering shear action.Concrete method of testing is as follows:
1, build concrete component shown in Fig. 1, equivalent round bar height is L, and section radius is r.
2, Fig. 2 supporting steel frame and Fig. 3 load bracket are seated in order.
3, displacement meter is installed, the displacement of measurement and positioning reinforcing bar.
4, load application, is placed in concrete load block on load bracket.
5, just displacement l (t is read
0), then initial shear strain is
6, displacement l (t, the t of the spacer bar of t is obtained by header long-term acquisition data
0), then the shear strain of t component is
7, shear creep coefficient φ
sc(t, t
0) describe, then have
Above content is only and technological thought of the present utility model is described; protection domain of the present utility model can not be limited with this; every technological thought according to the utility model proposes, any change that technical scheme basis is done, within the protection domain all falling into the utility model claims.
Claims (5)
1. the concrete shearing torsion proving installation of creeping, it is characterized in that, comprise concrete bed (1), the cylindrical concrete round bar (2) vertically arranged is built at concrete bed (1) center, concrete bed (1) is provided with supporting steel frame (3); Concrete round bar (2) top is provided with power transmission reinforcing bar (6), load bracket (5) intermediate openings, and be set on concrete round bar (2), and be lifted on supporting steel frame (3) by steel strand wires (8) from top to bottom; Steel strand wires one end is connected with load bracket (5), and the other end is connected on power transmission reinforcing bar (6).
2. the concrete shearing according to claim 1 torsion proving installation of creeping, it is characterized in that, described supporting steel frame (3) is fixed on concrete bed (1) by bolt (4).
3. the concrete shearing according to claim 1 torsion proving installation of creeping, it is characterized in that, the top of described supporting steel frame (3) is provided with and turns to steel tank (9), and steel strand wires (8) are connected on power transmission reinforcing bar (6) after turning to steel tank (9).
4. the concrete shearing according to claim 1 torsion proving installation of creeping, it is characterized in that, described power transmission reinforcing bar (6) is the reinforcing bar that two right-angled intersections are arranged in concrete round bar (2), and the side of concrete round bar (2) is stretched out at the two ends of two reinforcing bars respectively.
5. the concrete shearing according to claim 4 torsion proving installation of creeping, it is characterized in that, the below of described power transmission reinforcing bar (6) is provided with spacer bar (7), by change in displacement and then the reckoning shear creep of displacement meter measurement and positioning reinforcing bar (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520699503.2U CN204882267U (en) | 2015-09-10 | 2015-09-10 | Testing arrangement that twists reverse who creeps is cuted to concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520699503.2U CN204882267U (en) | 2015-09-10 | 2015-09-10 | Testing arrangement that twists reverse who creeps is cuted to concrete |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204882267U true CN204882267U (en) | 2015-12-16 |
Family
ID=54826629
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520699503.2U Active CN204882267U (en) | 2015-09-10 | 2015-09-10 | Testing arrangement that twists reverse who creeps is cuted to concrete |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204882267U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105092393A (en) * | 2015-09-10 | 2015-11-25 | 长安大学 | Torsion test device and method for concrete shear creep |
-
2015
- 2015-09-10 CN CN201520699503.2U patent/CN204882267U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105092393A (en) * | 2015-09-10 | 2015-11-25 | 长安大学 | Torsion test device and method for concrete shear creep |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201520988U (en) | Physical pile group vertical uplift-resisting static load testing system | |
| CN202881856U (en) | Concrete pouring support prepressing device | |
| CN111400801B (en) | Method for determining shear bearing capacity of light ultra-high performance concrete beam | |
| CN110398429B (en) | Steel pipe concrete anti-seismic performance test device and test method considering influence of construction process | |
| CN205223871U (en) | Suspension bridge bridge tower overarm brace pre -compaction device | |
| CN104358213B (en) | Consider the firm structure limited bracket of concrete triangle of battered leg effect of contraction with to pull bar combination constructing method thereof | |
| CN201972094U (en) | Prepressing system of hanging basket in suspending irrigation construction | |
| CN204882267U (en) | Testing arrangement that twists reverse who creeps is cuted to concrete | |
| CN210151795U (en) | Novel high bearing platform single pile horizontal static load test device | |
| CN215366868U (en) | Prepressing system for hanging basket of cantilever beam | |
| CN102750856B (en) | Experiment model for continuous beam | |
| CN104594174B (en) | A kind of CFST Arch Bridge seismic capability evaluation method based on intensity Yu ductility | |
| CN111797449B (en) | Method for judging reasonable height of layered pouring concrete beam | |
| CN204475179U (en) | Bridge construction Cast-in-situ Beam, bent cap, binder concrete attaching prestressed girder support | |
| CN105092393B (en) | The torsion proving installation that a kind of concrete shearing is crept and method of testing | |
| CN202466651U (en) | Loading device for axial force test of prestressed pipe pile | |
| CN205676784U (en) | Bracket reverse drawing loads prepressing device | |
| CN204302118U (en) | A kind of expansive concrete tensile creep test device | |
| CN209144666U (en) | Frock suitable for continuous rigid frame overweight 0# piece bracket pre-compaction of high mound large-span | |
| CN103185682A (en) | Loading method for axial forces of pre-stressed pipe pile | |
| CN214328534U (en) | 0# block bracket pre-pressing device of continuous rigid frame bridge | |
| CN211227916U (en) | Geogrid for roadbed reinforcement | |
| CN204000562U (en) | The compound rigid frame bridge of a kind of vertical prestressing steel-concrete | |
| CN210269455U (en) | Creep test device for FRP rib anchor system | |
| CN203256625U (en) | Suspended basket pre-pressing counter-pulling type suspended basket system for bridge |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |