CN203758849U - Device capable of researching performances of steel tube concrete axial compression member under load and corrosion - Google Patents
Device capable of researching performances of steel tube concrete axial compression member under load and corrosion Download PDFInfo
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- CN203758849U CN203758849U CN201320890745.0U CN201320890745U CN203758849U CN 203758849 U CN203758849 U CN 203758849U CN 201320890745 U CN201320890745 U CN 201320890745U CN 203758849 U CN203758849 U CN 203758849U
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- axial compression
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Abstract
The utility model discloses a device capable of researching the performances of a steel tube concrete axial compression member under load and corrosion, belonging to the field of structural engineering. The device mainly comprises a loading device, a corrosion device and a measuring device, wherein the loading device mainly comprises a bearing plate and a pull rod (containing a nut); the corrosion device mainly comprises a corrosion tank, a corrosive liquid, an insulating layer and an external power supply; and the measuring device mainly comprises a load sensor and a mechanical dial indicator. The device can simultaneously realize the long-term load action and electrochemical corrosion action of the steel tube concrete axial compression member; by adopting electrochemical corrosion, the corrosion speed is faster than natural environment corrosion, and testing progress can be quickened; through the initial loading stage, electrochemical corrosion/long-term loading state and loading damaging stage, the axial pressure-compression amount stress full-process curve of the steel tube concrete axial compression member can be drawn by the test data.
Description
Technical field
The utility model belongs to Structural Engineering field, particularly a kind of device of studying steel pipe concrete axial compression member performance under load and corrosion.
Background technology
Steel pipe concrete belongs to a kind of of unitized construction, refers to and in steel pipe, fills the common stressed and structure that forms of concrete and bi-material.By the layout of steel pipe, can be divided into solid steel pipe concrete, hollow sandwich steel pipe concrete and centrifugal steel pipe concrete etc.; By section form, can be divided into circle, side/rectangle, polygon and chapped pipe concrete etc.Steel pipe concrete is often born larger load in Practical Project, also will be subject to the corrosive attack of corrosive liquids or gas etc. in surrounding environment simultaneously, and the problems referred to above can not be ignored in engineering design and application, are necessary to study.
Have for the test unit of steel pipe concrete axial compression member performance study under long duration load and method or for test unit and the method for steel pipe concrete axial compression member electrochemical corrosion resistant performance study, but above-mentioned test unit and method can only realize a kind of effect.
Utility model content
In order to study the stress performance of steel pipe concrete axial compression member under axle power and corrosion acting in conjunction, must relate to corresponding test unit and method, the utility model proposes a kind of test unit for steel pipe concrete axial compression member electrochemical corrosion resistant performance study under long duration load, can realize the action of long-term load of steel pipe concrete axial compression member and galvanic corrosion effect simultaneously.
A device of studying steel pipe concrete axial compression member performance under load and corrosion, is mainly comprised of charger, corrosion device and measurement mechanism three parts, and wherein charger mainly comprises loading plate and pull bar (containing nut); Corrosion device mainly comprises steel etching tank, corrosive liquid, insulation course and external direct current power supply; Measurement mechanism mainly comprises load transducer and mechanical type clock gauge; Steel pipe concrete axial compression member is placed in the steel etching tank of corrosion device, and on steel pipe concrete axial compression member, places charger simultaneously, by measurement mechanism, concrete axial compression member action of long-term load and galvanic corrosion effect is measured.
One end of described four pull bars is fixed by nut, and the other end of four pull bars is through four prefabricated holes on loading plate; On loading plate, place steel cushion block, then on steel cushion block, place steel etching tank; On steel etching tank base plate, place insulation course, placing steel tubes concrete axial compression member on insulation course then, the exposure of test specimen end plate is also answered insulation processing;
On the test specimen end plate of steel pipe concrete axial compression member, place insulation course, then on insulation course, place steel cushion block, four pull bars are through enough four the prefabricated holes on large loading plate of another piece rigidity; Every pull bar is worn a load transducer, then fixes by nut; Preset mechanical type clock gauge is arranged between two loading plates; Measure the relative displacement between two loading plates, screw nut loading until reach design load, record every grade of load and corresponding decrement thereof simultaneously;
In steel etching tank, inject corrosive liquid, liquid level should be concordant with the lower surface of test specimen end plate, take steel etching tank as negative electrode, the steel pipe of steel pipe concrete axial compression member is anode, external external direct current power supply starts corrosion, and periodic logging load and corresponding decrement thereof are until reach corrosion/load for a long time time limit during this period.
The utility model adopts specific charger, and by original upload stage, galvanic corrosion/long-term load phase and destruction load phase, gained test figure can be drawn out the stressed the Complete Curve of axial pressure-decrement of steel pipe concrete axial compression member.Both be applicable to solid steel pipe concrete, hollow sandwich steel pipe concrete and centrifugal steel pipe concrete etc., be also applicable to circle, side/rectangle, polygon and chapped pipe concrete etc.
Advantage of the present utility model and effect are:
1. the utility model can be realized the action of long-term load of steel pipe concrete axial compression member and galvanic corrosion effect simultaneously.
2. the utility model adopts galvanic corrosion, and corrosion speed, higher than natural environment corrosion, can be accelerated test progress.
3. the utility model gained test figure can be drawn out the stressed the Complete Curve of axial pressure-decrement of steel pipe concrete axial compression member.
Accompanying drawing explanation
Fig. 1 is the test unit schematic diagram of solid steel pipe concrete axial compression member electrochemical corrosion resistant performance study under long duration load;
Fig. 2 is the test unit schematic diagram using in the original upload stage;
The test unit schematic diagram that Fig. 3 is used for destroying load phase;
1 pull bar in above-mentioned figure, 2 nuts, 3 loading plates, 4 steel cushion blocks, 5 steel etching tanks, 6 insulation courses, 7 steel pipe concrete axial compression members, 8 test specimen end plates, 9 load transducers, 10 mechanical type clock gauges, 11 corrosive liquids, 12 external direct current power supplies, 13 pressing machinees;
Fig. 4 is the stressed the Complete Curve of the solid steel pipe concrete axial compression in one party cross section members shaft pressure (N)-decrement (Δ).
Embodiment
A device of studying steel pipe concrete axial compression member performance under load and corrosion, as Figure 1-3, is comprised of charger, corrosion device and measurement mechanism three parts, and wherein charger mainly comprises loading plate 3 and pull bar 1 (containing nut 2); Corrosion device mainly comprises steel etching tank 5, corrosive liquid 11, insulation course 6 and external direct current power supply 12 etc.; Measurement mechanism mainly comprises load transducer 9 and mechanical type clock gauge 10.Steel pipe concrete axial compression member 7 is placed in the steel etching tank 5 of corrosion device, and on steel pipe concrete axial compression member, places charger simultaneously, by measurement mechanism, steel pipe concrete axial compression member action of long-term load and galvanic corrosion effect is measured.
One end of described four pull bars 1 is fixing by nut 2, and the other end of four pull bars 1 is through four prefabricated holes on loading plate 3; On loading plate 3, place steel cushion block 4, then on steel cushion block 4, place steel etching tank 5; On steel etching tank 5 base plates, place insulation course 6, placing steel tubes concrete axial compression member 7 on insulation course 6 then, the exposure of test specimen end plate 8 is also answered insulation processing;
On the test specimen end plate 8 of steel pipe concrete axial compression member 7, place insulation course 6, then on insulation course 6, place 4, four pull bars of steel cushion block 1 through enough four the prefabricated holes on large loading plate 3 of another piece rigidity; Every pull bar 1 is worn a load transducer 9, more fixing by nut 2; Preset mechanical type clock gauge 10 is arranged between two loading plates; Measure the relative displacement between two loading plates, screw nut 2 loadings until reach design load, record every grade of load and corresponding decrement thereof simultaneously;
In steel etching tank, inject corrosive liquid 11, liquid level should be concordant with the lower surface of test specimen end plate 8, take steel etching tank 5 as negative electrode, the steel pipe of steel pipe concrete axial compression member 7 is anode, external external direct current power supply 12 starts corrosion, and periodic logging load and corresponding decrement thereof are until reach corrosion/load for a long time time limit during this period.
Study a method for steel pipe concrete axial compression member performance under load and corrosion, adopt the device of above-mentioned research steel pipe concrete axial compression member performance under load and corrosion, according to following steps, carry out:
(1) original upload, records load and corresponding decrement thereof;
(2) keep original upload value constant, in steel etching tank, inject corrosive liquid, external external direct current power supply starts corrosion, records load and corresponding decrement thereof;
(3) remove steel etching tank, keep long-term loaded value constant, disposable destruction loads, and records load and corresponding decrement thereof.
Adopt device of the present utility model to carry out steel pipe concrete axial compression member and during performance measurement, be divided into three phases under load and corrosion:
The original upload stage: as shown in Figure 2, first in one end of four pull bars 1, twist respectively good nut 2, then by four pull bars 1 through enough four the prefabricated holes on large loading plate 3 of a rigidity; On loading plate 3, place steel cushion block 4, then on steel cushion block 4, place steel etching tank 5; On steel etching tank 5 base plates, place insulation course 6, placing steel tubes concrete axial compression member 7 on insulation course 6 then, the exposure of test specimen end plate 8 is also answered insulation processing; On the test specimen end plate 8 of steel pipe concrete axial compression member 7, place insulation course 6, then on insulation course 6, place steel cushion block 4, then by four pull bars 1 through enough four the prefabricated holes on large loading plate 3 of another piece rigidity; Every pull bar 1 is worn a load transducer 9, and then twists the nut 2 of the good other end; The relative displacement that preset mechanical type clock gauge 10 is measured between two loading plates; Manually screw nut 2 loadings until reach design load, record every grade of load and corresponding decrement thereof simultaneously.
Galvanic corrosion/long-term load phase: as shown in Figure 1, keep original upload value constant, in steel etching tank, inject corrosive liquid 11, liquid level should be concordant with the lower surface of test specimen end plate 8, take steel etching tank 5 as negative electrode, the steel pipe of steel pipe concrete axial compression member 7 is anode, and external external direct current power supply 12 starts corrosion, and periodic logging load and corresponding decrement thereof are until reach corrosion/load for a long time time limit during this period.
Destroy load phase: as shown in Figure 3, extract corrosive liquid 11 out, remove external external direct current power supply 12 and steel etching tank 5, keep long-term loaded value constant, with crane, steel pipe concrete axial compression member 7 is transported on pressing machine 13 and done disposable destruction load test together with self-reaction force device integral body, record load and corresponding decrement thereof simultaneously.
Adopt the solid steel pipe concrete axial compression in one party cross section member to test, solid steel pipe concrete axial compression member length L=480mm, outer length of side B=160mm, steel pipe original wall thickness t
s=3.83mm, corrosion thickness Δ t=1.18mm, corrosive liquid concentration ρ=3.5%, design are held and are carried grade r
b=60% and etching time t=120d.The stressed the Complete Curve of the axial pressure obtaining after off-test (N)-decrement (Δ), wherein fine line is original upload step-by-step test result; Heavy line is galvanic corrosion/long-term load phase test findings; Dotted line is for destroying load phase test findings.
Claims (2)
1. study steel pipe concrete axial compression member device of performance under load and corrosion for one kind, can realize the action of long-term load of steel pipe concrete axial compression member and galvanic corrosion effect simultaneously, it is characterized in that being comprised of charger, corrosion device and measurement mechanism three parts, wherein charger mainly comprises loading plate, pull bar, nut; Corrosion device mainly comprises steel etching tank, corrosive liquid, insulation course and external direct current power supply; Measurement mechanism mainly comprises load transducer and mechanical type clock gauge; Steel pipe concrete axial compression member is placed in steel etching tank, and on steel pipe concrete axial compression member, places charger simultaneously, by measurement mechanism, concrete axial compression member action of long-term load and galvanic corrosion effect is measured.
2. a kind of device of studying steel pipe concrete axial compression member performance under load and corrosion according to claim 1, is characterized in that one end of four pull bars is fixed by nut, and the other end of four pull bars is through four prefabricated holes on loading plate; On loading plate, place steel cushion block, then on steel cushion block, place steel etching tank; On steel etching tank base plate, place insulation course, placing steel tubes concrete axial compression member on insulation course then, the exposure of test specimen test specimen end plate is also answered insulation processing;
On the test specimen end plate of steel pipe concrete axial compression member, place insulation course, then on insulation course, place steel cushion block, four pull bars are through enough four the prefabricated holes on large loading plate of another piece rigidity; Every pull bar is worn a load transducer, then fixes by nut; Preset mechanical type clock gauge is arranged between two loading plates; Measure the relative displacement between two loading plates, screw nut loading until reach design load, record every grade of load and corresponding decrement thereof simultaneously;
In steel etching tank, inject corrosive liquid, liquid level should be concordant with the lower surface of test specimen end plate, take steel etching tank as negative electrode, the steel pipe of steel pipe concrete axial compression member is anode, the corrosion of external external direct current power supply, periodic logging load and corresponding decrement thereof are until reach corrosion/load for a long time time limit during this period.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320890745.0U CN203758849U (en) | 2013-12-31 | 2013-12-31 | Device capable of researching performances of steel tube concrete axial compression member under load and corrosion |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320890745.0U CN203758849U (en) | 2013-12-31 | 2013-12-31 | Device capable of researching performances of steel tube concrete axial compression member under load and corrosion |
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| Publication Number | Publication Date |
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| CN203758849U true CN203758849U (en) | 2014-08-06 |
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| CN201320890745.0U Withdrawn - After Issue CN203758849U (en) | 2013-12-31 | 2013-12-31 | Device capable of researching performances of steel tube concrete axial compression member under load and corrosion |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103728182A (en) * | 2013-12-31 | 2014-04-16 | 沈阳建筑大学 | Device and method for researching performance of steel pipe concrete axial compression component under load and corrosion |
-
2013
- 2013-12-31 CN CN201320890745.0U patent/CN203758849U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103728182A (en) * | 2013-12-31 | 2014-04-16 | 沈阳建筑大学 | Device and method for researching performance of steel pipe concrete axial compression component under load and corrosion |
| CN103728182B (en) * | 2013-12-31 | 2016-03-02 | 沈阳建筑大学 | The apparatus and method of research steel pipe concrete pull-down component performance under load with corrosion |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140806 Effective date of abandoning: 20160302 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |