CN104596758A - Pull-out test device and test method thereof of grouting sleeve connectors - Google Patents
Pull-out test device and test method thereof of grouting sleeve connectors Download PDFInfo
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- CN104596758A CN104596758A CN201510063372.3A CN201510063372A CN104596758A CN 104596758 A CN104596758 A CN 104596758A CN 201510063372 A CN201510063372 A CN 201510063372A CN 104596758 A CN104596758 A CN 104596758A
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Abstract
The invention relates to a test device of concrete filled steel tube grouting sleeve connector, in particular to a pull-out test device and a test method thereof of grouting sleeve connectors. The pull-out test device comprises an upper loading frame, a lower loading frame, a fastening block and a pressure sensor. The upper loading frame is of 'door'-shaped structure welded by steel plates different in thickness, the lower loading frame is formed by welding the steel plates and round steel pipes, the upper steel plates are provided with a test piece hole and grouting holes in advance, and the steel pipes is filled with high-strength grouting stuffing. The fastening block is manufactured by two docked steel ingots, the steel ingots are connected by high-strength bolts, and the fastening block is provided with a test piece hole in advance. The pull-out test device can well simulate connecting performance of the grouting sleeve connectors and meets the requirement of pull-out test of the grouting sleeve connectors. In addition, the pull-out test device is simple in structure and high in practicality.
Description
Technical field
The present invention relates to the test unit of concrete filled steel tube grout sleeve web member, specifically a kind of pull-out test unit of grout sleeve web member and test method thereof.
Background technology
It is a kind of new steel structure connected mode that grout sleeve connects, and this connected mode compensate for traditional welding and bolted deficiency, as the existence due to the heat-affected zone near weld seam during welding, causes the performance of steel to change, affects its usability; Although and bolt connects convenient and simple, under alternate load effect, easily loosen, and drilling accuracy requirement is higher.Grout sleeve connection overcomes these shortcomings, therefore widespread use in steel beam column structure, especially obtains in oceanographic engineering field and assembled architecture field and develops rapidly and apply.
At present, the performance test of sleeve connector mostly adopts integrated member to test, and to obtain the switching performance of grout sleeve web member, but this method expends comparatively large, and test design is complicated, and other complex effects many factors; Another simple method tests its switching performance by the compression test of test specimen, but this method and its practical implementation performance are not inconsistent.In view of above reason, it is necessary for carrying out research and discovery to the test unit of grout sleeve web member.
Summary of the invention
The present invention is intended to solve the complicated problem with not providing the unidirectional tension of test specimen of existing grout sleeve web member performance test design, a kind of grout sleeve web member is provided to pull out test unit and test method thereof, can the switching performance of simulate grout sleeve, meet the demand of grout sleeve web member pull-out test, and package unit structure is simple, practical.
The present invention solves described problem, and the technical scheme of employing is:
A pull-out test unit for grout sleeve web member, comprises loading frame, lower loading frame, fixture block, pressure transducer, grout sleeve specimen joints, and described upper loading frame becomes " door " character form structure by different-thickness Plate Welding; Described lower loading frame is welded by steel plate and round steel pipe, and top steel plate is bearing plate, reserved test specimen hole and grout hole on it, by grout hole at round steel pipe inside perfusion high-strength grout, forms pressure-bearing short column; Described fixture block is the steel ingot of two pieces of docking, reserved test specimen hole on fixture block, the described upper loading frame of fixture block carrying; The outer sleeve upper end of described grout sleeve specimen joints is welded with top backing plate, inner sleeve lower end is welded with bottom backing plate, when the outer sleeve of grout sleeve specimen joints passes the reserved test specimen hole on described bearing plate, top backing plate is stuck on described bearing plate, when the inner sleeve of grout sleeve specimen joints passes the reserved test specimen hole on described fixture block, described fixture block is stuck on the backing plate of bottom; Power is delivered to fixture block by upper loading frame by pressing machine, and power is applied to interior pipe by bottom backing plate and is pulled out by interior pipe by fixture block.
The test method of above-mentioned grout sleeve web member pull-out test unit, carry out in the steps below:
A. according to grout sleeve specimen joints size and requirement of strength, loading frame and the steel plate needed for lower loading frame assembly and round steel pipe on processing and fabricating, and the upper loading frame of assembling and lower loading frame; The top bearing plate middle circle bore dia of lower loading frame is determined according to the outer sleeve size of grout sleeve specimen joints and the bottom backing plate of inner sleeve lower weld, ensures that test specimen can pass through bearing plate; For round steel pipe perfusion high-strength grout, bearing plate both sides grout hole ensures that grouting material injects smoothly, and grouting material adopts the high-strength grout of more than C80;
B. according to grout sleeve specimen joints inner sleeve size, fixture block size and high-strength bolt diameter is determined; Fixture block middle part Circularhole diameter is determined according to inner sleeve size;
C. grout sleeve specimen joints is put on lower loading frame, top backing plate on the outer sleeve of grout sleeve specimen joints is stuck on the bearing plate of grout sleeve specimen joints, then fixture block is placed on the bottom backing plate on the inner sleeve of grout sleeve specimen joints, by adjusting upper loading frame and fixture block position, make package unit steady;
D. on upper loading frame, lay pressure transducer, and package unit is placed on pressure testing machine tests; Power is delivered to fixture block by the load plate of upper loading frame by pressing machine, and power is applied to inner sleeve by the bottom backing plate on inner sleeve by fixture block, realizes the pull-out of sleeve connector.
Adopt the present invention of technique scheme, compared with prior art, its outstanding feature is:
1. grout sleeve web member pull-out test unit is that grout sleeve test provides new test method, avoids the deficiency that traditional experiment only carries out intensity test;
2. package unit makes simple, and cost is lower, is suitable for popularization and application on a large scale;
3. grout sleeve specimen joints is easy to make, process of the test and operation is simple, does not have too high requirement to testing crew technical merit;
4. compared with traditional integral component, its uncontrollable influence factor is less, better can simulate the switching performance of sleeve connection node.
As preferably, the present invention further technical scheme is:
The upper loading frame top center section of described " door " character form structure is " H " type load plate assembly of Plate Welding, and both sides are vertical load plate, and vertical load plate is welded with vertical stiffening rib, and vertical stiffening rib length is less than the length of vertical load plate.Upper loading frame like this has enough large non-deformability, ensures effective transmission of pressure.
The steel ingot forming two pieces of docking of described fixture block is connected as one by high-strength bolt, and fixture block both sides are welded with location-plate respectively.Fixture block is made by the steel ingot that rigidity is enough large, and connects with high-strength bolt, and fixture block resistance to overturning is strong, and pressure transfer effect is good; Fixture block middle part Circularhole diameter is determined according to the inner sleeve size of grout sleeve specimen joints.
Described two pieces of location-plate inside surface spacing, slightly larger than described vertical load plate outside surface spacing, are stuck in inside location-plate when vertical load plate bottom is dropped on fixture block just, and vertical stiffening rib bottom is stuck on location-plate.Two pieces of location-plates so effectively can fix the position of load plate, prevent loading frame from offseting.
Described lower loading frame is welded by two round steel pipe of top bearing plate, lower connecting plate and centre, round steel pipe inside perfusion high-strength grout.Lower loading frame like this has enough large compressive strength, and especially bearing plate rigidity in top is enough large, can avoid bending because pressure is excessive; Lower connecting plate plays the role of positioning to two round steel pipe.
Triangular reinforcing plate is welded with respectively between described bearing plate and two round steel pipe.The non-deformability of bearing plate strengthened further by stiffening plate, ensures the stability of single unit system.
Accompanying drawing explanation
Fig. 1 is the grout sleeve web member pull-out test unit perspective view of the embodiment of the present invention;
Fig. 2 is the main TV structure schematic diagram of grout sleeve web member pull-out test unit of the embodiment of the present invention;
Fig. 3 is upper loading frame structural representation in Fig. 1;
Fig. 4 is the vertical view of Fig. 3;
Fig. 5 is lower loading frame structural representation in Fig. 1;
Fig. 6 is the vertical view of Fig. 5;
Fig. 7 is fixture block structural representation in Fig. 1;
Fig. 8 is the vertical view of Fig. 7;
Fig. 9 is grout sleeve specimen joints structural representation in Fig. 1;
In figure: pressure transducer 1, upper loading frame 2, lower loading frame 3, fixture block 4, grout sleeve specimen joints 5, " H " type load plate assembly 21, vertical load plate 22, vertical stiffening rib 23, bearing plate 31, round steel pipe 32, web joint 33, triangle stiffening plate 34, test specimen hole 311, grout hole 312, high-strength bolt 41, location-plate 42, circular hole 43, top cushion block 51, bottom cushion block 52, outer sleeve 53, inner sleeve 54.
embodiment:
Below in conjunction with embodiment, the invention will be further described, and object is only to understand content of the present invention better, and therefore, the cited case does not limit the scope of the invention.
See Fig. 1, Fig. 9, grout sleeve web member pull-out test unit described in the present embodiment, by pressure transducer 1, upper loading frame 2, lower loading frame 3, fixture block 4, grout sleeve connect test specimen 5 totally five parts form, upper loading frame 2, lower loading frame 3 and fixture block 4 form the main body frame of package unit, and pressure transducer 1 adopts HC-200t type pressure transducer; Steel outer sleeve 53 upper weld that grout sleeve connects test specimen 5 has top cushion block 51, steel inner sleeve 54 lower weld bottom cushion block 52, and top cushion block 51 is square plate, and bottom cushion block 52 is circular steel plate; Be stuck in bottom fixture block 4 on bottom backing plate 52.
See Fig. 2, Fig. 3, Fig. 4, upper loading frame 2 is " door " character form structures become by the Plate Welding of different-thickness, the top center section of " door " character form structure is " H " type load plate assembly 21, both sides are vertical load plate 22, vertical load plate 22 is welded with vertical stiffening rib 23, vertical stiffening rib 23 length is less than the length of vertical load plate 22, that is reserves the position of location-plate 42 in vertical stiffening rib 23 bottom.
See Fig. 2, Fig. 5, Fig. 6, lower loading frame 3 is welded by two round steel pipe 32 of the bearing plate 31 on top, the web joint 33 of bottom and centre, reserved test specimen hole 311 and grout hole 312 on bearing plate 31, by grout hole 312 at round steel pipe 32 inside perfusion high-strength grout, grouting material adopts intensity to be the high-strength grout of C80, forms pressure-bearing short column; The width of web joint 33 is slightly wide compared with bearing plate 31, contributes to the stability improving lower loading frame 3; Weld triangle stiffening plate 34 respectively between bearing plate 31 with two round steel pipe 32, strengthen the non-deformability of bearing plate 31 further, the resistance to overturning of assurance device.
See Fig. 2, Fig. 7, Fig. 8, fixture block 4 connects making by the steel ingot that two pieces of rigidity is enough large by the high-strength bolt 41 that diameter is 22mm, reserved circular hole 43 on fixture block 4, and the diameter of circular hole 43 is determined according to inner sleeve 54 size of grout sleeve specimen joints 5; Fixture block 4 both sides welding location-plate 42, both sides location-plate 42 inside surface spacing is slightly larger than two vertical load plate 22 outside surface spacing, vertical load plate 22 bottom is stuck in inside location-plate 42 when dropping on fixture block 4 just, and vertical stiffening rib 23 bottom is stuck on location-plate 42; Location-plate 14 plays the effect of fixing vertical load plate 22 position, prevents loading frame 2 from offseting.
See Fig. 1, Fig. 2, the test method of above-mentioned grout sleeve web member pull-out test unit, carry out in the steps below:
A. according to size and the requirement of strength of grout sleeve specimen joints 5, loading frame 2 and the steel plate needed for lower loading frame 3 assembly and round steel pipe on processing and fabricating, and the upper loading frame 2 of assembling and lower loading frame 3; Top bearing plate 31 middle test specimen hole 311 diameter of lower loading frame 3 is determined according to the bottom backing plate 52 of outer sleeve 53 size of grout sleeve specimen joints 5 and inner sleeve 54 lower weld, ensures that test specimen can pass through bearing plate 31; For round steel pipe 32 pours into high-strength grout, the grout hole 312 of bearing plate 31 both sides ensures that grouting material injects smoothly, and grouting material adopts the high-strength grout of more than C80;
B. according to inner sleeve 54 size of grout sleeve specimen joints 5, fixture block 4 size and high-strength bolt 41 diameter is determined; Fixture block 4 middle part circular hole 43 diameter is determined according to inner sleeve 54 size;
C. grout sleeve specimen joints 5 is put on lower loading frame 3, top backing plate 51 on the outer sleeve 53 of grout sleeve specimen joints 5 is stuck on bearing plate 31, then fixture block 4 is placed on the bottom backing plate 52 on the inner sleeve 54 of grout sleeve specimen joints 5, by adjusting the position of upper loading frame 2 and fixture block 4, make package unit steady;
D. on upper loading frame 2, lay pressure transducer 1, and package unit is placed on pressure testing machine tests; Power is delivered to fixture block 4 by the load plate of upper loading frame 2 by pressing machine, and power is applied to inner sleeve 54 by the bottom backing plate 52 on inner sleeve 54 by fixture block 4, realizes the pull-out of sleeve connector.
The foregoing is only the better feasible embodiment of the present invention, not thereby limit to interest field of the present invention, the equivalence change that all utilizations description of the present invention is done, be all contained within interest field of the present invention.
Claims (7)
1. a pull-out test unit for grout sleeve web member, comprises loading frame, lower loading frame, fixture block, pressure transducer, grout sleeve specimen joints, it is characterized in that: described upper loading frame becomes " door " character form structure by different-thickness Plate Welding; Described lower loading frame is welded by steel plate and round steel pipe, and top steel plate is bearing plate, reserved test specimen hole and grout hole on it, by grout hole at round steel pipe inside perfusion high-strength grout, forms pressure-bearing short column; Described fixture block is the steel ingot of two pieces of docking, reserved test specimen hole on fixture block, the described upper loading frame of fixture block carrying; The outer sleeve upper end of described grout sleeve specimen joints is welded with top backing plate, inner sleeve lower end is welded with bottom backing plate, when the outer sleeve of grout sleeve specimen joints passes the reserved test specimen hole on described bearing plate, top backing plate is stuck on described bearing plate, when the inner sleeve of grout sleeve specimen joints passes the reserved test specimen hole on described fixture block, described fixture block is stuck on the backing plate of bottom; Power is delivered to fixture block by upper loading frame by pressing machine, and power is applied to interior pipe by bottom backing plate and is pulled out by interior pipe by fixture block.
2. the pull-out test unit of grout sleeve web member as claimed in claim 1, it is characterized in that: the upper loading frame top center section of described " door " character form structure is " H " type load plate assembly of Plate Welding, both sides are vertical load plate, vertical load plate is welded with vertical stiffening rib, and vertical stiffening rib length is less than the length of vertical load plate.
3. the pull-out test unit of grout sleeve web member as claimed in claim 1, is characterized in that: the steel ingots forming two pieces of docking of described fixture block are connected as one by high-strength bolt, and fixture block both sides are welded with location-plate respectively.
4. the pull-out test unit of grout sleeve web member as described in Claims 2 or 3, it is characterized in that: described two pieces of location-plate inside surface spacing are slightly larger than described vertical load plate outside surface spacing, vertical load plate bottom is stuck in inside location-plate when dropping on fixture block just, and vertical stiffening rib bottom is stuck on location-plate.
5. the pull-out test unit of grout sleeve web member as claimed in claim 1, is characterized in that: described lower loading frame is welded by two round steel pipe of top bearing plate, lower connecting plate and centre, round steel pipe inside perfusion high-strength grout.
6. the pull-out test unit of grout sleeve web member as claimed in claim 5, is characterized in that: be welded with triangular reinforcing plate respectively between described bearing plate and two round steel pipe.
7. grout sleeve web member pulls out a test method for test unit as claimed in claim 1, it is characterized in that, carries out in the steps below:
A. according to grout sleeve specimen joints size and requirement of strength, loading frame and the steel plate needed for lower loading frame assembly and round steel pipe on processing and fabricating, and the upper loading frame of assembling and lower loading frame; The top bearing plate middle circle bore dia of lower loading frame is determined according to the outer sleeve size of grout sleeve specimen joints and the bottom backing plate of inner sleeve lower weld, ensures that test specimen can pass through bearing plate; For round steel pipe perfusion high-strength grout, bearing plate both sides grout hole ensures that grouting material injects smoothly, and grouting material adopts the high-strength grout of more than C80;
B. according to grout sleeve specimen joints inner sleeve size, fixture block size and high-strength bolt diameter is determined; Fixture block middle part Circularhole diameter is determined according to inner sleeve size;
C. grout sleeve specimen joints is put on lower loading frame, top backing plate on the outer sleeve of grout sleeve specimen joints is stuck on the bearing plate of grout sleeve specimen joints, then fixture block is placed on the bottom backing plate on the inner sleeve of grout sleeve specimen joints, by adjusting upper loading frame and fixture block position, make package unit steady;
D. on upper loading frame, lay pressure transducer, and package unit is placed on pressure testing machine tests; Power is delivered to fixture block by the load plate of upper loading frame by pressing machine, and power is applied to inner sleeve by the bottom backing plate on inner sleeve by fixture block, realizes the pull-out of sleeve connector.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510063372.3A CN104596758B (en) | 2015-02-06 | 2015-02-06 | Pull-out test device and test method thereof of grouting sleeve connectors |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510063372.3A CN104596758B (en) | 2015-02-06 | 2015-02-06 | Pull-out test device and test method thereof of grouting sleeve connectors |
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| CN104596758A true CN104596758A (en) | 2015-05-06 |
| CN104596758B CN104596758B (en) | 2017-05-10 |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004011203A (en) * | 2002-06-05 | 2004-01-15 | Kajima Corp | Precast src-column joining section structure |
| JP2007255091A (en) * | 2006-03-24 | 2007-10-04 | Ohbayashi Corp | Method of filling grout, joint method of pc member, and joint structure of pc member |
| CN103698213A (en) * | 2013-12-29 | 2014-04-02 | 河北联合大学 | Tension and compression test device and method for steel bar connection test piece |
| CN203684409U (en) * | 2014-01-17 | 2014-07-02 | 中冶建筑研究总院有限公司 | Armored concrete grouting connection sleeve |
| CN203745287U (en) * | 2014-03-17 | 2014-07-30 | 河北联合大学 | Test loading device for high-strength grouting material local stamping performance constrained by circular steel pipe |
| CN203745315U (en) * | 2014-03-17 | 2014-07-30 | 河北联合大学 | Test device for local punching shear performance of steel tube confined high-strength grouting material |
| CN204405318U (en) * | 2015-02-06 | 2015-06-17 | 河北联合大学 | The pull-out test unit of grout sleeve web member |
-
2015
- 2015-02-06 CN CN201510063372.3A patent/CN104596758B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004011203A (en) * | 2002-06-05 | 2004-01-15 | Kajima Corp | Precast src-column joining section structure |
| JP2007255091A (en) * | 2006-03-24 | 2007-10-04 | Ohbayashi Corp | Method of filling grout, joint method of pc member, and joint structure of pc member |
| CN103698213A (en) * | 2013-12-29 | 2014-04-02 | 河北联合大学 | Tension and compression test device and method for steel bar connection test piece |
| CN203684409U (en) * | 2014-01-17 | 2014-07-02 | 中冶建筑研究总院有限公司 | Armored concrete grouting connection sleeve |
| CN203745287U (en) * | 2014-03-17 | 2014-07-30 | 河北联合大学 | Test loading device for high-strength grouting material local stamping performance constrained by circular steel pipe |
| CN203745315U (en) * | 2014-03-17 | 2014-07-30 | 河北联合大学 | Test device for local punching shear performance of steel tube confined high-strength grouting material |
| CN204405318U (en) * | 2015-02-06 | 2015-06-17 | 河北联合大学 | The pull-out test unit of grout sleeve web member |
Non-Patent Citations (1)
| Title |
|---|
| 韩瑞龙等: "灌浆套筒连接技术及其应用", 《结构工程师》 * |
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Effective date of registration: 20170407 Address after: Xinhua Xidao 063009 Hebei province Tangshan City Lunan District No. 46 Applicant after: Hebei United University Applicant after: China MCC 22 Group Corp., Ltd. Address before: Xinhua Xidao 063009 Hebei province Tangshan City Lunan District No. 46 Applicant before: Hebei United University |
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