CN103134750A - Steel bar drawing testing device suitable for Hopkinson pressure bar - Google Patents
Steel bar drawing testing device suitable for Hopkinson pressure bar Download PDFInfo
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- CN103134750A CN103134750A CN2013100439207A CN201310043920A CN103134750A CN 103134750 A CN103134750 A CN 103134750A CN 2013100439207 A CN2013100439207 A CN 2013100439207A CN 201310043920 A CN201310043920 A CN 201310043920A CN 103134750 A CN103134750 A CN 103134750A
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Abstract
The invention discloses a steel bar drawing testing device suitable for a Hopkinson pressure bar. The device is capable of achieving bonding sliding performance researches between steel bars and concrete under impact loading. The device is composed of a connecting part, a counterforce frame, a bearing table, a fixing device and a power transmission plate. An entering rod is connected with the counterforce frame through the connecting part so as to enable the entering rod and the counterforce frame to move corporately when the impact loading is exerted. The other end of the counterforce frame is tightly connected with a steel bar through a steel plate provided with threaded holes so as to transmit the impact loading, wherein the steel bar is embedded in a sample. The bearing table is fixed on a supporting seat of the Hopkinson pressure bar device so as to restrain displacement of the concrete sample in the loading direction, and therefore the drawing test under the steel bar impact loading is achieved. According to the steel bar drawing testing device, the test of steel bar dynamic drawing is achieved by utilizing the Hopkinson pressure bar, the testing device is simple in design, convenient to install and dismantle, and high in applicability.
Description
Technical field:
The present invention relates to a kind of reinforcing bar pull-out test device, particularly a kind of reinforcing bar pull-out test device that is applicable to Hopkinson pressure bar.
Background technology:
Adhesive property between reinforcing bar and concrete is reinforcing bar and concrete coefficient basis, and between research reinforcing bar and concrete, one of major way of adhesive property is the reinforcing bar pull-out test.That carries out at present the reinforcing bar pull-out test mostly is greatly static loading.In actual conditions, the structure load that can withstand shocks equally, as the shock of automobile, the impact of wave etc.At present considerably less for the research of reinforcing bar pull-out test under impact load.One of reason is that the reinforcing bar pull-out test under impacting is higher to equipment requirement.The impact that how to utilize existing test unit to carry out the reinforcing bar pull-out test loads and becomes a difficult point.Part Study person adopts the Hopkinson pull bar that the reinforcing bar drawing is implemented to impact and loads.But carry out such test, larger to the loading equipemtn change, the size of test specimen also is restricted.Not yet find at present to utilize Hopkinson pressure bar to carry out the correlative study of reinforcing bar pull-out test.
Summary of the invention:
To impact load test higher to equipment requirement in order to overcome existing reinforcing bar drawing, utilizes existing testing equipment, the present invention proposes a kind of simple in structurely, is applicable to the reinforcing bar pull-out test device of Hopkinson pressure bar.
Technical scheme of the present invention is:
A kind of reinforcing bar pull-out test device that is applicable to Hopkinson pressure bar comprises web member, incident bar, counter-force frame, force-bearing table, force transmitting board and stationary installation.Incident bar and counter-force frame link together by web member, incident bar end and counter-force frame end close contact, bond by glue between web member and incident bar, web member is connected with the counter-force frame by screw bolt and nut, and the counter-force frame is placed on three load bars perpendicular to loading direction of force-bearing table.Described load bar tip protrusion 10mm is moving perpendicular to loading direction in order to limit the counter-force frame.Force transmitting board and counter-force frame close contact are combined closely by hole and the end threaded reinforcing bar of processing of threading in middle, in the middle of reinforcing bar is embedded in when concrete sample is built simultaneously.Force-bearing table is connected with three stationary installations by bolt, and stationary installation is bolted on bearing, and the force bearing plate perpendicular to loading direction on force-bearing table retrains at loading direction concrete sample jointly with the trapezoidal load support that is parallel to loading direction.Damping is placed on the reinforcing bar right side.Reinforcement displacement measures by the foil gauge of two series connection of pasting on incident bar.The loading end of reinforcing bar is near the foil gauge of two series connection of concrete sample position stickup.
The hole of interior threading is contained in described web member bottom, and the counter-force frame has four circular holes that diameter is larger at correspondence position, is used for carrying out when bolt connects the adjustment of position.
Described reinforcing bar right-hand member increases and the damping contact area near the position of the damping nut of screwing on.
Described force-bearing table is connected with 3 stationary installations by bolt, and the hole of 5 interior threadings is arranged at each stationary installation top, and force-bearing table bottom correspondence position has 15 than macropore, adjusts the position when connecting; There are 3 interior threading holes each stationary installation side, is connected with bearing by bolt.
Compared with prior art beneficial effect of the present invention is:
The present invention is simple in structure, and bolt is used in the connection between each parts mostly, installation, convenient disassembly.Take full advantage of the resistance to tension of the good anti-shearing force of glue and bolt, incident bar and counter-force frame are combined by web member, both associated movements during load application.Thereby can record reinforcement displacement by incident pulse and reflected impulse.Can the test specimen of different size be loaded in counter-force frame and force-bearing table scope.
Description of drawings:
Fig. 1 is structural representation of the present invention;
Fig. 2 is the stationary installation schematic diagram
Fig. 3 is the web member planimetric map;
Fig. 4 is the web member elevation drawing;
Fig. 5 is counter-force frame planimetric map;
Fig. 6 is the force-bearing table planimetric map;
Fig. 7 is the force-bearing table elevation drawing;
Fig. 8 is the stationary installation planimetric map;
Fig. 9 is the stationary installation elevation drawing.
In figure: 1, web member; 2, the counter-force frame; 3, force-bearing table; 4, glue; 5, bolt; 6, nut; 7, force transmitting board; 8, reinforcing bar; 9, concrete sample; 10, bolt; 11, stationary installation; 12, bolt; 13, the load bar; 14, force bearing plate; 15, load supports; 16, incident bar; 17, bearing; 18, damping; 19, nut; 20, foil gauge.
Embodiment:
Below in conjunction with accompanying drawing, structure of the present invention is specifically addressed.
As shown in Figure 1 and Figure 2, impact load is delivered to counter-force frame 2 by incident bar 16, and by glue 4 bondings, counter-force frame 2 is by bolt 5 and web member 1 combination, incident bar 16 and counter-force frame 2 associated movements during load application with web member 1 for incident bar 16.Load passes to force transmitting board 7 by counter-force frame 2, the hole internal thread in the middle of force transmitting board 7 and the tight interlock of screw thread of reinforcing bar 8 loading ends, with Load Transfer to reinforcing bar 8.Load passes to concrete sample 9 via the cohesive action between reinforcing bar 8 and concrete again, and a nut 19 is fixed by screw thread in reinforcing bar 8 ends, increases and damping 18 contacts area with this.Force-bearing table 3 is fixed on bearing 17 by stationary installation 11, and the force bearing plate 14 on force-bearing table 3 and load support 15 actings in conjunction, and the movement of confined concrete test specimen 9 on loading direction makes test specimen produce destruction under impact load.The displacement of reinforcing bar 8 measures by the foil gauge 20 that sticks on incident bar 16, and load measures by the foil gauge 20 that sticks on reinforcing bar 8 loading ends.
?
Below in conjunction with accompanying drawing, this device embodiment is further set forth.
As Fig. 1-shown in Figure 9, counter-force frame 2 is placed on the load bar of force-bearing table 3.Use glue 4 web member 1 to be fixed on the right side of incident bar 16, web member 1 right side flushes with incident bar 16 ends.By web member threaded hole, four, 1 right side and counter-force frame four, 2 left side circular hole, use bolt 5 and nut 6 that web member 1 and counter-force frame 2 is fixing.Reinforcing bar 8 in concrete sample 9 is passed counter-force frame 2 right side circular holes, and concrete sample 9 right sides prop up the force bearing plate 14 on force-bearing table 3.Force transmitting board 7 is connected connection with reinforcing bar by screw thread, and prop up counter-force frame right side.Nut 19 is threaded connection in reinforcing bar 8 right sides, flushes with the reinforcing bar right-hand end.Damping 18 is placed on reinforcing bar 8 right sides, and a segment distance is stayed in the centre.Load reaches counter-force frame 2 by incident bar 16, then reaches reinforcing bar 8 by force transmitting board 7, because concrete sample 9 is lived by force bearing plate 14 constraints, thereby successfully carries out pull-out test.Reinforcing bar 8 displacements record by the foil gauge 20 that sticks on two series connection on incident bar 16.Load records by the foil gauge 20 that sticks on two series connection on reinforcing bar 8.
Claims (4)
1. reinforcing bar pull-out test device that is applicable to Hopkinson pressure bar, comprise web member (1), incident bar (16), counter-force frame (2), force-bearing table (3), force transmitting board (7) and stationary installation (11), incident bar (16) and counter-force frame (2) link together by web member (1), incident bar (16) end and counter-force frame (2) end close contact, between web member (1) and incident bar (16), by glue (4) bonding, web member (1) is connected 6 by bolt (5) with nut) be connected with counter-force frame (2); Counter-force frame (2) is placed on (3) three load bars (13) perpendicular to loading direction of force-bearing table; Load bar (13) tip protrusion 10mm is in order to limit counter-force frame (2) oppositely mobile perpendicular to loading; Force transmitting board (7) and counter-force frame (2) close contact, the hole by threading in middle is connected with the end threaded reinforcing bar of processing (8) simultaneously; Reinforcing bar (8) is in the middle of concrete sample (9) is embedded in when building; Force-bearing table (3) is connected with three stationary installations (11) by bolt (10), stationary installation (11) is fixed on bearing (17) by bolt (12), force-bearing table (3) upper perpendicular to loading direction force bearing plate (14) and the trapezoidal load support (15) that is parallel to loading direction jointly concrete sample is retrained at loading direction; Damping (18) is placed on reinforcing bar (8) right side; The upper foil gauge (20) of pasting two series connection of incident bar (16), the loading end of reinforcing bar (8) is near the foil gauge (20) of two series connection of concrete sample (9) position stickup.
2. a kind of reinforcing bar pull-out test device that is applicable to Hopkinson pressure bar according to claim 1, it is characterized in that: the hole of containing interior threading bottom described web member (1), counter-force frame (2) has four circular holes that diameter is larger at correspondence position, is used for carrying out when bolt (5) connects the adjustment of position.
3. a kind of reinforcing bar pull-out test device that is applicable to Hopkinson pressure bar according to claim 1 is characterized in that: described reinforcing bar (8) right-hand member increases and the damping contact area near the position of damping (18) nut (19) of screwing on.
4. a kind of reinforcing bar pull-out test device that is applicable to Hopkinson pressure bar according to claim 1, it is characterized in that: described force-bearing table (3) is connected with 3 stationary installations (10) by bolt (10), the hole of 5 interior threadings is arranged at each stationary installation top, force-bearing table bottom correspondence position has 15 than macropore, adjusts the position when connecting; There are 3 interior threading holes each stationary installation (10) side, is connected with bearing (15) by bolt (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100439207A CN103134750A (en) | 2013-02-01 | 2013-02-01 | Steel bar drawing testing device suitable for Hopkinson pressure bar |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100439207A CN103134750A (en) | 2013-02-01 | 2013-02-01 | Steel bar drawing testing device suitable for Hopkinson pressure bar |
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| CN103134750A true CN103134750A (en) | 2013-06-05 |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103645133A (en) * | 2013-11-19 | 2014-03-19 | 河海大学 | Hydraulic fixing device used for measuring bond properties of steel bar with concrete |
| CN104165838A (en) * | 2014-08-08 | 2014-11-26 | 太原理工大学 | Impact drawing experimental device and experimental method |
| CN104181102A (en) * | 2014-08-08 | 2014-12-03 | 太原理工大学 | Experimental device and experimental method of impact drawing-twisting load |
| CN104198306A (en) * | 2014-08-08 | 2014-12-10 | 太原理工大学 | Dynamic pull-out testing device and method under active impact confining pressure |
| CN104568744A (en) * | 2015-01-19 | 2015-04-29 | 浙江大学 | Fiber adhesive property testing device suitable for common tension tester |
| CN104819933A (en) * | 2015-05-20 | 2015-08-05 | 河海大学 | Static and dynamic bonding-slipping whole-process curve testing apparatus and testing method thereof |
| CN104913988A (en) * | 2015-05-11 | 2015-09-16 | 河海大学 | Hopkinson principle-based concrete axial tensile strength measuring method |
| CN106996895A (en) * | 2017-05-04 | 2017-08-01 | 东北大学 | The experimental provision of concrete dynamic shear strength is calculated using Hopkinson pressure bar |
| CN109709032A (en) * | 2019-01-04 | 2019-05-03 | 浙江大学 | A kind of dynamic adhesion performance testing device based on Hopkinson pressure bar emitter |
| CN111595675A (en) * | 2020-05-25 | 2020-08-28 | 温州设计集团有限公司 | Shear nail pulling resistance test loading device matched with pressure testing machine |
| CN112816347A (en) * | 2020-12-30 | 2021-05-18 | 中国矿业大学(北京) | NPR anchor rod Hopkinson tensile test device and method under high strain rate condition |
| CN113945514A (en) * | 2021-10-21 | 2022-01-18 | 中交鹭建有限公司 | SHPB reinforcing bar and concrete dynamic bonding slippage test additional device |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103645133A (en) * | 2013-11-19 | 2014-03-19 | 河海大学 | Hydraulic fixing device used for measuring bond properties of steel bar with concrete |
| CN104165838A (en) * | 2014-08-08 | 2014-11-26 | 太原理工大学 | Impact drawing experimental device and experimental method |
| CN104181102A (en) * | 2014-08-08 | 2014-12-03 | 太原理工大学 | Experimental device and experimental method of impact drawing-twisting load |
| CN104198306A (en) * | 2014-08-08 | 2014-12-10 | 太原理工大学 | Dynamic pull-out testing device and method under active impact confining pressure |
| CN104165838B (en) * | 2014-08-08 | 2016-08-24 | 太原理工大学 | A kind of experimental provision impacting drawing and experimental technique |
| CN104568744B (en) * | 2015-01-19 | 2018-06-12 | 浙江大学 | A kind of fibres bond performance test device suitable for common tensile testing machine |
| CN104568744A (en) * | 2015-01-19 | 2015-04-29 | 浙江大学 | Fiber adhesive property testing device suitable for common tension tester |
| CN104913988A (en) * | 2015-05-11 | 2015-09-16 | 河海大学 | Hopkinson principle-based concrete axial tensile strength measuring method |
| CN104913988B (en) * | 2015-05-11 | 2018-03-30 | 河海大学 | Concrete axial tensile strength measuring method based on Hopkinson principle |
| CN104819933A (en) * | 2015-05-20 | 2015-08-05 | 河海大学 | Static and dynamic bonding-slipping whole-process curve testing apparatus and testing method thereof |
| CN106996895A (en) * | 2017-05-04 | 2017-08-01 | 东北大学 | The experimental provision of concrete dynamic shear strength is calculated using Hopkinson pressure bar |
| CN109709032A (en) * | 2019-01-04 | 2019-05-03 | 浙江大学 | A kind of dynamic adhesion performance testing device based on Hopkinson pressure bar emitter |
| CN111595675A (en) * | 2020-05-25 | 2020-08-28 | 温州设计集团有限公司 | Shear nail pulling resistance test loading device matched with pressure testing machine |
| CN112816347A (en) * | 2020-12-30 | 2021-05-18 | 中国矿业大学(北京) | NPR anchor rod Hopkinson tensile test device and method under high strain rate condition |
| CN113945514A (en) * | 2021-10-21 | 2022-01-18 | 中交鹭建有限公司 | SHPB reinforcing bar and concrete dynamic bonding slippage test additional device |
| CN113945514B (en) * | 2021-10-21 | 2024-05-14 | 中交鹭建有限公司 | SHPB reinforcing bar and concrete dynamic bonding slip test additional device |
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Application publication date: 20130605 |