CN203758894U - Device for researching performance of steel tube concrete flexural member under load and corrosion - Google Patents
Device for researching performance of steel tube concrete flexural member under load and corrosion Download PDFInfo
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- CN203758894U CN203758894U CN201320889794.2U CN201320889794U CN203758894U CN 203758894 U CN203758894 U CN 203758894U CN 201320889794 U CN201320889794 U CN 201320889794U CN 203758894 U CN203758894 U CN 203758894U
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- steel pipe
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- flexural member
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- pipe concrete
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Abstract
The utility model discloses a device for researching the performance of a steel tube concrete flexural member under load and corrosion, belonging to the field of structural engineering. The testing device consists of three parts, namely a loading device, a corroding device and a measuring device, wherein the loading device mainly comprises a jack, a large (small) supporting seat, a pull rod (comprising a nut), a distributive girder, a loading girder and a counter-force girder; the corroding device mainly comprises a corrosive groove, an upper cathode plate, corrosive liquid, an insulating layer and an external power source; the measuring device mainly comprises a load sensor, a mechanical micrometer gauge, a transverse board and a connecting rod. The device disclosed by the utility model can be used for simultaneously achieving a long-term loading effect and an electrochemical corrosive effect on the steel tube concrete flexural member; by adopting electrochemical corrosion of which the speed is higher than that of the corrosion of natural environment, the test progress can be quickened; through an initial loading stage, an electrochemical corrosion/long-term loading stage and a destructive loading stage, the obtained test data can be used for drawing a curve of an overall process of bending moment-midspan deflection stress of the steel tube concrete flexural member.
Description
Technical field
The utility model belongs to Structural Engineering field, particularly a kind of device of studying steel pipe the concrete flexure member performance under load and corrosion.
Background technology
Steel pipe concrete belongs to the one of unitized construction, refers to and in steel pipe, fills the common stressed and structure that forms of concrete and bi-material.Can be divided into solid steel pipe concrete, hollow sandwich steel pipe concrete and centrifugal steel pipe concrete etc. by the layout of steel pipe; Can be divided into circle, side/rectangle, polygon and chapped pipe concrete etc. by section form.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 flexural member performance study under long duration load and method or for test unit and the method for steel pipe concrete flexural 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 the concrete flexure 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 flexural member electrochemical corrosion resistant performance study under long duration load, can realize action of long-term load and galvanic corrosion effect to steel pipe concrete flexural member simultaneously.
The utility model belongs to a kind of device of studying steel pipe the concrete flexure member performance under load and corrosion, be made up of charger, corrosion device and measurement mechanism three parts, wherein charger mainly comprises lifting jack, large (little) bearing, pull bar (containing nut), distribution beam, loading beam and reaction beam etc.; Corrosion device mainly comprises steel etching tank, top minus plate, corrosive liquid, insulation course and external direct current power supply etc.; Measurement mechanism mainly comprises load transducer and mechanical type clock gauge and tablet and connecting link etc.Steel pipe concrete flexural member is placed in the steel etching tank of corrosion device, and on steel pipe concrete flexural member, places charger simultaneously, by measurement mechanism, steel pipe concrete flexural member action of long-term load and galvanic corrosion effect is measured.
Described two large bearings and two pull bars are fixed on ground, and steel etching tank is placed on two large bearings; On base plate in steel etching tank, place two little bearings of freely-supported, between the little bearing of the base plate of steel etching tank and freely-supported, insulation course is set;
Placing steel tubes the concrete flexure member on two little bearings of freely-supported is placed two little bearings of distribution beam on steel pipe concrete flexural member, between steel pipe concrete flexural member and two little bearings of distribution beam, insulation course is set;
On two little bearings of distribution beam, place distribution beam, then in distribution beam, place load transducer; Loading beam is placed on load transducer and by nut and is fixed through two pull bars; On loading beam, place lifting jack, then reaction beam is placed on lifting jack and by nut and is fixed through two pull bars;
Mechanical type clock gauge is placed on respectively on the locational tablet of natural axis that is welded in advance steel pipe concrete flexural member; Measure mid-span deflection and support settlement with mechanical type clock gauge respectively;
Taking steel etching tank and the another top minus plate arranging as negative electrode, taking the steel pipe of steel pipe concrete flexural member as anode, external direct current power supply corrosion.
The exposed parts of the little bearing of described freely-supported needs insulation processing, and the exposed parts of the little bearing of distribution beam needs insulation processing, and the connecting link between steel pipe concrete flexural member and tablet needs insulation processing.
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 moment of flexure-mid-span deflection of steel pipe concrete flexural 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 action of long-term load and the galvanic corrosion effect to steel pipe concrete flexural member 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 moment of flexure-mid-span deflection of steel pipe concrete flexural member.
Brief description of the drawings
Fig. 1 is the test unit front view of solid steel pipe the concrete flexure member electrochemical corrosion resistant performance study under long duration load;
Fig. 2 is the test unit side view of solid steel pipe the concrete flexure member electrochemical corrosion resistant performance study under long duration load;
The test unit schematic diagram of Fig. 3 for using in the original upload stage;
The test unit schematic diagram of Fig. 4 for using in destruction load phase;
In upper figure; 1 large bearing, 2 pull bars, 3 steel etching tanks, 4 little bearings, 5 insulation courses, 6 steel pipe concrete flexural members, 7 end plates, the little bearing of 8 distribution beam, 9 distribution beam, 10 load transducers, 11 loading beams, 12 nuts, 13 lifting jack, 14 reaction beams, 15 mechanical type clock gauges, 16 tablets, 17 connecting links, 18 corrosive liquids, 19 top minus plates, 20 external direct current power supplies.
Fig. 5 is one party cross section solid steel pipe the concrete flexure member moment of flexure (M)-mid-span deflection (u
m) stressed the Complete Curve.
Embodiment
The utility model belongs to a kind of device of studying steel pipe the concrete flexure member performance under load and corrosion, as Figure 1-4, be made up of charger, corrosion device and measurement mechanism three parts, wherein charger mainly comprises lifting jack 13, large bearing 1 and ramuscule seat 4, pull bar 2 (containing nut 12), distribution beam 9, loading beam 11 and reaction beam 14; Corrosion device mainly comprises steel etching tank 3, top minus plate 19, corrosive liquid 18, insulation course 5 and external direct current power supply 20; Measurement mechanism mainly comprises load transducer 10 and mechanical type clock gauge 15 and tablet 16 and connecting link 17; Steel pipe concrete flexural member 6 is placed in the etching tank 3 of corrosion device, and on steel pipe concrete flexural member, places charger simultaneously, by measurement mechanism, steel pipe concrete flexural member action of long-term load and galvanic corrosion effect is measured.
Described two large bearings 1 and two pull bars 2 are fixed on ground, and steel etching tank 3 is placed on two large bearings 1; On base plate in steel etching tank 3, place two freely-supported ramuscule seats 4; Between the base plate of steel etching tank 3 and freely-supported ramuscule seat 4, insulation course 5 is set;
Placing steel tubes the concrete flexure member 6 on two freely-supported ramuscule seats 4 is placed two distribution beam ramuscule seats 8 on steel pipe concrete flexural member 6, between steel pipe concrete flexural member 6 and two distribution beam ramuscule seats 8, insulation course 5 is set;
On two distribution beam ramuscule seats 8, place distribution beam 9, then in distribution beam 9, place load transducer 10; Loading beam 11 is placed on load transducer 10 and by nut 12 and is fixed through two pull bars 2; On loading beam 11, place lifting jack 13, then reaction beam 14 is placed on lifting jack 13 and by nut 12 and is fixed through two pull bars 2;
Mechanical type clock gauge 15 is placed on respectively on the locational tablet 16 of natural axis that is welded in advance steel pipe concrete flexural member 6; Measure mid-span deflection and support settlement with mechanical type clock gauge 15 respectively;
Taking steel etching tank 3 and the another top minus plate 19 arranging as negative electrode, taking the steel pipe of steel pipe concrete flexural member 6 as anode, external direct current power supply 20 starts corrosion.
The exposed parts insulation processing of described freely-supported ramuscule seat 4, the also insulation processing of exposed parts of distribution beam ramuscule seat 8, the also insulation processing of connecting link 17 between steel pipe concrete flexural member 6 and tablet 16.
Study a method for steel pipe the concrete flexure member performance under load and corrosion, adopt the device of above-mentioned research steel pipe the concrete flexure member performance under load and corrosion, carry out according to following steps;
(1) original upload, records load and corresponding amount of deflection and support settlement thereof;
(2) keep original upload value constant, in steel etching tank, inject corrosive liquid, external direct current power supply starts corrosion, records load and corresponding amount of deflection and support settlement thereof;
(3) remove steel etching tank, keep long-term loaded value constant, disposable destruction loads, and records load and corresponding amount of deflection and support settlement thereof.
When the device of use research steel pipe concrete flexural member performance under load and corrosion is measured, point following three phases;
The original upload stage; As shown in Figure 3, first fix two large bearings 1 and two pull bars 2, then on two large bearings 1, place steel etching tank 3; On the base plate of steel etching tank 3, place two freely-supported ramuscule seats 4, on the base plate of steel etching tank 3 and between freely-supported ramuscule seat 4, insulation course 5 is set, the also insulation processing of exposed parts of freely-supported ramuscule seat 4; Placing steel tubes the concrete flexure member 6 on two freely-supported ramuscule seats 4, the also insulation processing of exposed parts of the end plate 7 of steel pipe concrete flexural member 6; On steel pipe concrete flexural member 6, place two distribution beam ramuscule seats 8, between steel pipe concrete flexural member 6 and two distribution beam ramuscule seats 8, insulation course 5 is set, the also insulation processing of exposed parts of distribution beam ramuscule seat 8; On two distribution beam ramuscule seats 8, place enough large distribution beam 9 of rigidity, then in distribution beam 9, place load transducer 10; Loading beam 11 is placed on load transducer 10 to the nut 12 of then screwing on respectively on two pull bars 2 through two pull bars 2; On loading beam 11, place lifting jack 13, then reaction beam 14 is placed on lifting jack 13 through two pull bars 2, then screws nut 12; Measure mid-span deflection and support settlement with two mechanical type clock gauges 15 respectively, the pointer of clock gauge 15 is placed on respectively on the locational tablet 16 of natural axis that is welded in advance steel pipe concrete flexural member 6, the also insulation processing of connecting link 17 between steel pipe concrete flexural member 6 and tablet 16; Load with lifting jack 13 until reach design load, record every grade of load and corresponding amount of deflection and support settlement thereof simultaneously.
Galvanic corrosion/long-term load phase: as depicted in figs. 1 and 2, fastening nut 12, until the load of lifting jack 13 is replaced completely, removes lifting jack 13.Keep original upload value constant, in steel etching tank, inject corrosive liquid 18, liquid level should be higher than the upper surface of steel pipe concrete flexural member 6, taking steel etching tank 3 and the another top minus plate 19 arranging as negative electrode, taking the steel pipe of steel pipe concrete flexural member 6 as anode, external direct current power supply 20 starts corrosion, and periodic logging load and corresponding amount of deflection thereof and support settlement are until reach corrosion/load for a long time time limit during this period.
Destroy load phase: as shown in Figure 4, extract corrosive liquid 18 out, remove external direct current power supply 20 and steel etching tank 3 and top minus plate 19, do disposable destruction load test with lifting jack 13, record amount of deflection and the support settlement of load and correspondence thereof simultaneously.
Adopt the solid steel pipe the concrete flexure member in one party cross section to carry out performance test under load and corrosion, its length L=1250mm; Clear span L'=1050mm; Outer length of side B=160mm; Steel pipe original wall thickness t
s=3.83mm; Corrosion thickness △ t=0.69mm; Corrosive liquid concentration ρ=3.5%; Design is held and is carried grade r
b=60%; Etching time t=120d.Moment of flexure (M)-mid-span deflection (u obtaining after off-test
m) stressed the Complete Curve as shown in Figure 5, 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 (3)
1. study the device of steel pipe the concrete flexure member performance under load and corrosion for one kind, can realize action of long-term load and galvanic corrosion effect to steel pipe concrete flexural member simultaneously, it is characterized in that being made up of charger, corrosion device and measurement mechanism three parts, wherein charger mainly comprises lifting jack, large bearing, little bearing, pull bar, nut, distribution beam, loading beam and reaction beam etc.; Corrosion device mainly comprises etching tank, top minus plate, corrosive liquid, insulation course and external power supply etc.; Measurement mechanism mainly comprises load transducer and mechanical type clock gauge and tablet and connecting link etc.; Steel pipe concrete flexural member is placed in the etching tank of corrosion device, and on steel pipe concrete flexural member, places charger simultaneously, by measurement mechanism, steel pipe concrete flexural member action of long-term load and galvanic corrosion effect is measured.
2. a kind of device of studying steel pipe the concrete flexure member performance under load and corrosion according to claim 1, is characterized in that two large bearings and two pull bars are fixed on ground, and steel etching tank is placed on two large bearings; On base plate in steel etching tank, place two little bearings of freely-supported; Between the little bearing of the base plate of steel etching tank and freely-supported, insulation course is set;
Placing steel tubes the concrete flexure member on two little bearings of freely-supported is placed two little bearings of distribution beam on steel pipe concrete flexural member, between steel pipe concrete flexural member and two little bearings of distribution beam, insulation course is set;
On two little bearings of distribution beam, place distribution beam, then in distribution beam, place load transducer; Loading beam is placed on load transducer and by nut and is fixed through two pull bars; On loading beam, place lifting jack, then reaction beam is placed on lifting jack and by nut and is fixed through two pull bars;
Two mechanical type clock gauges are placed on respectively on the locational tablet of natural axis that is welded in advance steel pipe concrete flexural member; Measure mid-span deflection and support settlement with mechanical type clock gauge respectively;
Taking steel etching tank and the another top minus plate arranging as negative electrode, taking the steel pipe of steel pipe concrete flexural member as anode, external direct current power supply corrosion.
3. a kind of device of studying steel pipe the concrete flexure member performance under load and corrosion according to claim 2, the exposed parts that it is characterized in that the little bearing of described freely-supported needs insulation processing, the exposed parts of the little bearing of distribution beam needs insulation processing, and the connecting link between steel pipe concrete flexural member and tablet needs insulation processing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320889794.2U CN203758894U (en) | 2013-12-31 | 2013-12-31 | Device for researching performance of steel tube concrete flexural member under load and corrosion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320889794.2U CN203758894U (en) | 2013-12-31 | 2013-12-31 | Device for researching performance of steel tube concrete flexural member under load and corrosion |
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| CN203758894U true CN203758894U (en) | 2014-08-06 |
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|---|---|---|---|
| CN201320889794.2U Withdrawn - After Issue CN203758894U (en) | 2013-12-31 | 2013-12-31 | Device for researching performance of steel tube concrete flexural member under load and corrosion |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103698267A (en) * | 2013-12-31 | 2014-04-02 | 沈阳建筑大学 | Device and method for studying performance of steel pipe concrete bending member under load and corrosion conditions |
| CN105628599A (en) * | 2016-02-29 | 2016-06-01 | 沈阳建筑大学 | Device and method for studying performance of steel pipe concrete axial-tension member under loads and corrosion |
| CN117538160A (en) * | 2024-01-09 | 2024-02-09 | 华东交通大学 | Single-point long-term loading device and detection method for corrosion steel pipe concrete arch rib |
-
2013
- 2013-12-31 CN CN201320889794.2U patent/CN203758894U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103698267A (en) * | 2013-12-31 | 2014-04-02 | 沈阳建筑大学 | Device and method for studying performance of steel pipe concrete bending member under load and corrosion conditions |
| CN103698267B (en) * | 2013-12-31 | 2015-10-28 | 沈阳建筑大学 | The apparatus and method of research steel pipe the concrete flexure member performance under load with corrosion |
| CN105628599A (en) * | 2016-02-29 | 2016-06-01 | 沈阳建筑大学 | Device and method for studying performance of steel pipe concrete axial-tension member under loads and corrosion |
| CN117538160A (en) * | 2024-01-09 | 2024-02-09 | 华东交通大学 | Single-point long-term loading device and detection method for corrosion steel pipe concrete arch rib |
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Legal Events
| 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: 20151028 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |