CN104181020A - Auxiliary molding device capable of detecting tensile strength of reinforced concrete - Google Patents
Auxiliary molding device capable of detecting tensile strength of reinforced concrete Download PDFInfo
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- CN104181020A CN104181020A CN201410414744.8A CN201410414744A CN104181020A CN 104181020 A CN104181020 A CN 104181020A CN 201410414744 A CN201410414744 A CN 201410414744A CN 104181020 A CN104181020 A CN 104181020A
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- reinforcing bar
- tensile strength
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- reinforced concrete
- urceolus
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Abstract
The invention relates to an auxiliary molding device capable of detecting the tensile strength of reinforced concrete. The auxiliary molding device consists of two symmetrical one-piece devices, wherein each one-piece device comprises a support component, and a reinforcing steel bar locating component which is fixedly connected with the support component after being used for adjusting the axial displacement of a reinforcing steel bar; each reinforcing steel bar locating component comprises an inner barrel, an outer barrel and an adjusting knob sleeve, wherein one end, close to a mainboard, of each inner barrel is fixedly connected with a threaded rod, and an inner cavity at the other end of the inner barrel is a support cavity at one end of the reinforcing steel bar; an adjusting groove is formed in the outer circle of each outer barrel; each adjusting knob sleeve is arranged on the outer circle of the corresponding outer barrel provided with the adjusting groove in a sleeving manner; the inner circle of each outer barrel is provided with an internal thread matched with the corresponding threaded rod; each inner barrel is internally provided with a cushion layer. The auxiliary molding device has the advantages that the reinforcing steel bar is additionally adopted in an axis tensile strength test piece of the concrete, so that the device can be used for simulation according to the condition of the reinforcing steel bar, and the reinforcing steel bar is kept non-shift in the vibration molding process of the test piece. Compared with the axial tension strength of plain concrete, the tensile strength values of the concrete under the different reinforcing steel bar conditions can relatively well reflect the true condition of cracking and tensioning of a reinforced concrete structure.
Description
Technical field
The present invention relates to detect the auxiliary forming device of reinforced concrete tensile strength, is to detect reinforced concrete axial tensile strength, and its improvements are in plain concrete tensile-strength test piece axle center, to add reinforcing bar restriction, belong to building materials performance test apparatus.
Background technology
Xoncrete structure under arms in process often because external loads or autogenous shrinkage produce tension, can cracking after tension surpasses concrete limit stretching intensity impaired, therefore concrete stretch-proof ability be paid attention to always widely.
Concrete for hydraulic structure testing regulations, as stipulated concrete axle center tensile strength and limit stretch value testing regulations in the > > of < < DL/T5150-2001, but subjects is not contain the plain concrete of reinforcing bar, cannot detect concrete tension ability under reinforcing bar restriction, not be inconsistent with structure actual loading.In engineering mechanics research, for the constitutive relation (especially under pulled condition) of reinforced concrete (or claiming armored concrete), study far fewer than plain concrete material and this independent structure of reinforcing bar, and there is no the detection of actual loading situation.The tension constitutive relation of reinforced concrete can directly apply to the cracking resistance of evaluation structure, therefore detects the tensile strength of concrete under reinforcing bar limited case and is of great immediate significance.
summary of the invention:
The present invention is directed to the deficiencies in the prior art, by this device, at the axis embedded reinforcing bar of concrete tensile strength test specimen, detect concrete tension ability under reinforcing bar restriction.Use the sleeve in neutral vertical direction to keep reinforcing bar at concrete sample shaft core position; Can when vibrating moulding, not become flexible skew by fastening reinforcing bar; Simply small and exquisite, be easy to production and processing; In process of the test, do not increase additional process, can use on a large scale.
Technical solution of the present invention is as follows:
The auxiliary forming device that detects reinforced concrete tensile strength, it is comprised of two one-piece apparatus of symmetry, the reinforcing bar positioning component that each one-piece apparatus is fixedly connected with after comprising supporting member and regulating reinforcing bar axial displacement with supporting member; Described supporting member is comprised of mainboard and side plate; On this mainboard, symmetric offset spread has a plurality of equidistant circular connecting holes, for the location of reinforcing bar positioning component fixing; Side plate has two, is separately fixed at mainboard both sides; Described reinforcing bar positioning component comprises inner core and urceolus and adjusting knob cover; This inner core is fixedly connected with threaded rod by one end of mainboard, and other end inner chamber is the support chamber of reinforcing bar one end; Urceolus and mainboard being fixedly connected with for energy demolition; On urceolus cylindrical, have a regulating tank that is less than 1/2nd circumference, adjusting knob cover is enclosed within on the urceolus cylindrical of regulating tank; Urceolus inner circle has the internal thread mating with threaded rod; On inner core cylindrical, have corresponding with regulating tank on urceolus cylindrical and with the regulating tooth that tooth matches of stirring of adjusting knob cover; In described inner core, be provided with bed course.
Further technical scheme is:
The auxiliary forming device of described detection reinforced concrete tensile strength, its mainboard is rectangle or isosceles trapezoid or circle.
The auxiliary forming device of described detection reinforced concrete tensile strength, its mainboard is located and fixes with screw and reinforcing bar positioning component by the fixed flange on urceolus end face.
The auxiliary forming device of described detection reinforced concrete tensile strength, has a plurality of connecting holes on its mainboard, can be connected with a plurality of reinforcing bar positioning components, for the detection to many reinforced concrete tensile strength.
The auxiliary forming device of described detection reinforced concrete tensile strength, in its inner core, bed course is spongy layer or soft rubber layer or froth bed.
This test unit can be realized the detection of reinforced concrete axial tensile strength easily, only needs a pair of this device just can when moulding, reinforcing bar be embedded in concrete sample, has the following advantages:
1, the mainboard of supporting member and side plate are processed by sheet metal, and technique is simple, with low cost;
2, the reinforcing bar positioning component of restriction reinforcement location is arranged on the mainboard of supporting member, and perpendicular to mainboard, the pre-determine position of the reinforcing bar that assurance is imbedded in concrete sample, as center;
3, reinforcing bar positioning component is a rotary extension metal sleeve, and the reinforcing bar of inner core is had to good positioning action, prevents that reinforcing bar from loosening skew occurring in specimen molding vibrates process;
4, inner core is placed with the bed course that the ssible elastomeric material such as sponge, soft rubber, foam are made, and can coordinate the reinforcing bar detection limit tensile strength of different-diameter;
5, can be by changing the mainboard size of supporting member for the concrete tensile strength test specimen of all size;
6, this invention takes up space in little, tension direction does not increase resistance, does not affect the accuracy of test findings;
7, the present invention can not become flexible skew by fastening reinforcing bar when vibrating moulding; Simply small and exquisite, be easy to production and processing; In process of the test, do not increase additional process, can use on a large scale.
accompanying drawing explanation:
Fig. 1 is a kind of main TV structure schematic diagram of apparatus of the present invention, and 1 reinforcing bar positioning component is installed on mainboard;
Fig. 2 is the plan structure schematic diagram of Fig. 1;
Fig. 3 is that schematic diagram is looked on the right side of Fig. 1;
Fig. 4 is a kind of perspective view of apparatus of the present invention, is also to use view;
Fig. 5 is that schematic diagram is looked on the right side of another embodiment, and mainboard is rectangle, and 4 reinforcing bar positioning components are installed on it;
Fig. 6 is that schematic diagram is looked on the right side of another embodiment, and mainboard is square, and 3 reinforcing bar positioning components are installed on it;
Fig. 7 has the embodiment front view of the applied in any combination of overlapping apparatus of the present invention by the D-D cross-sectional schematic shown in Fig. 8 more; The total amphitypy of the present embodiment totally 4 covering devices is used in combination, wherein: A type device 1 cover, Type B device 3 covers, are B1, B2, B3;
Fig. 8 is the vertical view of the entire combination device that do not dissect shown in Fig. 7.
In figure: 1-supporting member; 1.1-mainboard; 1.2-side plate; 1.3-connecting hole; 2-reinforcing bar positioning component; 3-inner core; 3.1-threaded rod; 4-urceolus; 4.1-fixed flange; 5-adjusting knob cover; 6-reinforcing bar; A-A type device; B-B type device; B1, B2, B3-3 cover Type B device.
embodiment:
it is as follows that the invention will be further described in conjunction with the accompanying drawings and embodiments:
embodiment 1: be a basic embodiment.As shown in Figure 1,2,3, 4, detect the auxiliary forming device of reinforced concrete tensile strength, it is comprised of two one-piece apparatus of symmetry, the reinforcing bar positioning component 2 that each one-piece apparatus is fixedly connected with after comprising supporting member 1 and regulating reinforcing bar axial displacement with supporting member 1, this reinforcing bar positioning component 2 is rotary extension metal sleeves; Described supporting member 1 is comprised of mainboard 1.1 and side plate 1.2; On this mainboard 1.1, symmetric offset spread has a plurality of equidistant circular connecting holes 1.3, for the location of reinforcing bar positioning component 2 fixing; Side plate 1.2 has two, is separately fixed at mainboard 1.1 both sides; Described reinforcing bar positioning component 2 comprises inner core 3 and urceolus 4 and adjusting knob cover 5; This inner core 3 is fixedly connected with threaded rod 3.1 by one end of mainboard 1.1, and other end inner chamber is the support chamber of reinforcing bar one end; Urceolus 4 and mainboard 1.1 being fixedly connected with for energy demolition; On urceolus 4 cylindricals, have a regulating tank that is less than 1/2nd circumference, adjusting knob cover 5 is enclosed within on urceolus 4 cylindricals of regulating tank; Urceolus 4 inner circles have the internal thread mating with threaded rod 3.1; On inner core 3 cylindricals, have corresponding with regulating tank on urceolus 4 cylindricals and overlap 5 the regulating tooth that tooth matches of stirring with adjusting knob; In described inner core 3, be provided with bed course.
embodiment 2: be further embodiment.The auxiliary forming device of described detection reinforced concrete tensile strength, its mainboard 1.1 is rectangle or isosceles trapezoid or circle.Described mainboard 1.1 is located and fixes with screw and reinforcing bar positioning component 2 by the fixed flange 4.1 on urceolus 4 end faces.On the mainboard 1.1 of described supporting member 1, there are a plurality of connecting holes 1.3, can be connected with a plurality of reinforcing bar positioning components 2, for the detection to many reinforced concrete tensile strength.In described inner core 3, bed course is the bed course that the ssible elastomeric material such as spongy layer or soft rubber layer or foam are made, for coordinating the reinforcing bar detection limit tensile strength of different-diameter.
embodiment 3: be further embodiment.As shown in Figure 3, be to there is the auxiliary forming device that 1 cover the present invention detects reinforced concrete tensile strength, mainboard 1 is rectangle, on it, there are three rows, every row has 5, totally 15 connecting holes 1.3, and the present embodiment is provided with 1 reinforcing bar positioning component 2 is installed in central part connecting hole 1.3; The long 196mm of mainboard 1.1, wide 100mm.The long 80mm of reinforcing bar positioning component 2, the long 80mm of urceolus 4 wherein, external diameter 30mm, internal diameter 26mm; The long 30mm of inner core 3, external diameter 25mm, internal diameter 22mm, the long 40mm of threaded rod 3.1.
During test, as shown in Figure 4, the present invention that two single-pieces are inserted respectively at the two ends of the reinforcing bar 6 that will imbed detects in the inner core 3 of auxiliary forming device device of reinforced concrete tensile strength, puts in the lump the die trial of concrete for hydraulic structure test after connecting.This die trial is the Eight characters mould of dumbbell shaped, and two ends the widest part is 196mm, and this segment length is 30mm; Wide 100 mm in stage casing, long 110mm; Edge, Kuan Duanyu stage casing, two ends is pressed oblique line and is connected, and die trial is long 600mm altogether, is highly 100mm.Supporting member 1 install stable after, screw respectively the adjusting knob cover 5 of the apparatus of the present invention at reinforcing bar 6 two ends, by apparatus of the present invention, be tightly fitted in and in die trial, realize location after reinforcing bar is moved.
By experiment proportioning formation of concrete maximum size of coarse aggregate, be 26mm, be poured in this die trial, on shaking table, shake after plugging and pounding evenly.After reaching strength of mould stripping, carry out the demoulding, concrete sample can carry out test for tensile strength after reaching curing age, pounds to take out this device after gravel-concrete and use in order to test next time after off-test.
embodiment 4: be further embodiment.As shown in Figure 5, to there is the embodiment that 1 cover the present invention detects the auxiliary forming device of reinforced concrete tensile strength, mainboard 1.1 is rectangle, on it, there are three rows, every row has 5, totally 15 connecting holes 1.3, and the present embodiment two rows respectively have in 2 connecting holes 1.3 reinforcing bar positioning component 2 are installed, installing altogether 4, is for 4 concrete reinforcements are tested.
embodiment 5: as shown in Figure 6, to there is the embodiment that 1 cover the present invention detects the auxiliary forming device of reinforced concrete tensile strength, mainboard 1.1 is square, on it, there are three rows, every row has individual, and totally 9 connecting holes 1.3, are provided with reinforcing bar positioning component 2 in 3 connecting holes 1.3 of a row in the middle of the present embodiment, installing altogether 3, is for 3 concrete reinforcements are tested.
embodiment 6: as shown in Fig. 5,6,7,8, being the applied in any combination embodiment of embodiment 5 and 6, is also to have the embodiment that the present invention of many covers detects the auxiliary forming device of reinforced concrete tensile strength, for the situation in the intensive reinforcing bar of concrete district, tests.
As shown in Figure 7,8, the present embodiment Fig. 5 constructional device has a set of, claims A type device, and totally 4 reinforcing bars, are provided with 4 reinforcing bar positioning components 2 on mainboard 1.1; A type device its reinforcing bar 6 in Fig. 7 is that left and right is to arrangement, shown in upper and lower two lines; Fig. 6 structure has three covering devices, claims Type B device, is respectively B1, B2, B3, and totally 9 reinforcing bars, are provided with 3 reinforcing bar positioning components 2 on every cover mainboard 1.1, therefore have 9 cover reinforcing bar positioning components 2; Type B device its reinforcing bar 6 in Fig. 7 is arranged for fore-and-aft direction, with side by side shown in 9 circles.
As shown in Figure 7,8, the reinforcing bar 6 of 3 cover Type B device B1, B2, B3 inserts up and down between two row reinforcing bars 6 of A type device from fore-and-aft direction respectively, forms to have the auxiliary forming device that the present invention of many covers detect reinforced concrete tensile strength and be used in combination mode.
8 reinforcing bar positioning component 2 physical dimensions of 4 covers of A type device are as follows: described mainboard 1.1 is rectangle, long 196mm, wide 100mm.The described long 80mm of reinforcing bar positioning component 2, the long 80mm of urceolus 4 wherein, external diameter 30mm, internal diameter 26mm; The long 30mm of inner core 3, external diameter 25mm, internal diameter 22mm, the long 40mm of threaded rod 3.1.
18 reinforcing bar positioning component 2 physical dimensions of 9 covers of Type B device are as follows: described mainboard 1.1 is square, length of side 100mm.The described long 20mm of reinforcing bar positioning component 2, the long 20mm of urceolus 4 wherein, external diameter 30mm, internal diameter 26mm; The long 15mm of inner core 3, external diameter 25mm, internal diameter 22mm, the long 5mm of threaded rod 3.1.
As shown in Figure 7,8, during test, first one end of 4 reinforcing bars 6 of A type device is inserted respectively in the inner core 3 of reinforcing bar positioning component 2, by the B1 of Type B device, B2, all insert respectively in the inner core 3 of reinforcing bar positioning component 2 at the two ends of horizontal 3 reinforcing bars of B3, again the reinforcing bar of Type B device is prolonged perpendicular to A type device reinforcing bar direction and deliver in the interval between the reinforcing bar of root up and down 6 of A type device, again the other end of 4 reinforcing bars 6 of A type device is inserted respectively in the inner core 3 of corresponding reinforcing bar positioning component 2, again by the A connecting, Type B device integral body is put into concrete for hydraulic structure test die trial in the lump, and according to the position of testing requirements adjustment Type B device, after supporting member 1 installation of each device is stablized, screw respectively adjusting knob cover 5 and make whole A, Type B device is tightly fitted in die trial, realizing whole reinforcing bars fixedly positioning, by experiment proportioning formation of concrete maximum size of coarse aggregate, be finally 26mm, be poured in this die trial, after plugging and pounding evenly, on shaking table, shake, after reaching strength of mould stripping, carry out the demoulding, concrete sample can carry out test for tensile strength after reaching curing age, pounds to take out this device after gravel-concrete and use in order to test next time after off-test.
Specific embodiment described herein is only to the explanation for example of the present invention's spirit.Those skilled in the art can make various modifications or supplement or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present invention or surmount the defined scope of appended claims.
Claims (5)
1. an auxiliary forming device that detects reinforced concrete tensile strength, it is characterized in that: it is comprised of two one-piece apparatus of symmetry, each one-piece apparatus comprises supporting member (1) and can regulate with supporting member (1) the reinforcing bar positioning component (2) being fixedly connected with after reinforcing bar axial displacement; Described supporting member (1) is comprised of mainboard (1.1) and side plate (1.2); The upper symmetric offset spread of this mainboard (1.1) has a plurality of equidistant circular connecting holes (1.3), for the location of reinforcing bar positioning component (2) fixing; Side plate (1.2) has two, is separately fixed at mainboard (1.1) both sides; Described reinforcing bar positioning component (2) comprises inner core (3) and urceolus (4) and adjusting knob cover (5); This inner core (3) is fixedly connected with threaded rod (3.1) by one end of mainboard (1.1), and other end inner chamber is the support chamber of reinforcing bar one end; Urceolus (4) and mainboard (1.1) being fixedly connected with for energy demolition; On urceolus (4) cylindrical, have a regulating tank that is less than 1/2nd circumference, adjusting knob cover (5) is enclosed within on urceolus (4) cylindrical of regulating tank; Urceolus (4) inner circle has the internal thread mating with threaded rod (3.1); On inner core (3) cylindrical, have corresponding with regulating tank on urceolus (4) cylindrical and with the regulating tooth that tooth matches of stirring of adjusting knob cover (5); Described inner core is provided with bed course in (3).
2. the auxiliary forming device of detection reinforced concrete tensile strength according to claim 1, is characterized in that: mainboard (1.1) is rectangle or isosceles trapezoid or circle.
3. the auxiliary forming device of detection reinforced concrete tensile strength according to claim 1, is characterized in that: mainboard (1.1) is located and fixes with screw and reinforcing bar positioning component (2) by the fixed flange (4.1) on urceolus (4) end face.
4. the auxiliary forming device of detection reinforced concrete tensile strength according to claim 1, it is characterized in that: on described mainboard (1.1), have a plurality of connecting holes (1.3), can be connected with a plurality of reinforcing bar positioning components (2), for the detection to many reinforced concrete tensile strength.
5. the auxiliary forming device of detection reinforced concrete tensile strength according to claim 1, is characterized in that: in described inner core (3), bed course is spongy layer or soft rubber layer or froth bed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410414744.8A CN104181020B (en) | 2014-08-21 | The auxiliary forming device of detection armored concrete tensile strength |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410414744.8A CN104181020B (en) | 2014-08-21 | The auxiliary forming device of detection armored concrete tensile strength |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104181020A true CN104181020A (en) | 2014-12-03 |
| CN104181020B CN104181020B (en) | 2016-11-30 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| LT6275B (en) | 2015-07-14 | 2016-06-27 | Vilniaus Gedimino technikos universitetas | Mounting equipment for reinforcing bars group of concrete structural element |
| CN108918233A (en) * | 2018-09-25 | 2018-11-30 | 山东科技大学 | A kind of column cap reinforcement positioning device and application method for mold-bagged concrete cylinder bias test |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102183417A (en) * | 2011-03-04 | 2011-09-14 | 安徽省（水利部淮河水利委员会）水利科学研究院 | Method for testing flexural-tensile strength of concrete |
| CN103452143A (en) * | 2013-08-20 | 2013-12-18 | 广西建工集团第三建筑工程有限责任公司 | Post-cast strip tool type template convenient to assemble and disassemble |
| CN103615053A (en) * | 2013-11-27 | 2014-03-05 | 温州宏源水电建设有限公司 | Construction method for post-cast belt of cast-in-place reinforced concrete structure |
| CN103835303A (en) * | 2012-11-20 | 2014-06-04 | 贵阳铝镁设计研究院有限公司 | Shear resisting method and structure for cast-in-place reinforced concrete |
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102183417A (en) * | 2011-03-04 | 2011-09-14 | 安徽省（水利部淮河水利委员会）水利科学研究院 | Method for testing flexural-tensile strength of concrete |
| CN103835303A (en) * | 2012-11-20 | 2014-06-04 | 贵阳铝镁设计研究院有限公司 | Shear resisting method and structure for cast-in-place reinforced concrete |
| CN103452143A (en) * | 2013-08-20 | 2013-12-18 | 广西建工集团第三建筑工程有限责任公司 | Post-cast strip tool type template convenient to assemble and disassemble |
| CN103615053A (en) * | 2013-11-27 | 2014-03-05 | 温州宏源水电建设有限公司 | Construction method for post-cast belt of cast-in-place reinforced concrete structure |
Non-Patent Citations (3)
| Title |
|---|
| ZHAOHUI HUANG: "Modelling the bond between concrete and reinforcing steel in a fire", 《ENGINEERING STRUCTURES》, vol. 32, 15 September 2010 (2010-09-15) * |
| 李英民等: "钢筋混凝土框架夹心节点抗震性能试验研究", 《建筑结构学报》, vol. 31, no. 12, 31 December 2010 (2010-12-31) * |
| 邓天骥: "高强度大体积钢筋混凝土基础的浇筑技术", 《湖南大学学报》, vol. 28, no. 3, 30 June 2001 (2001-06-30) * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| LT6275B (en) | 2015-07-14 | 2016-06-27 | Vilniaus Gedimino technikos universitetas | Mounting equipment for reinforcing bars group of concrete structural element |
| CN108918233A (en) * | 2018-09-25 | 2018-11-30 | 山东科技大学 | A kind of column cap reinforcement positioning device and application method for mold-bagged concrete cylinder bias test |
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