CN102866057A - Loading device for pulling tests of steel-concrete mixed connection and production method - Google Patents

Loading device for pulling tests of steel-concrete mixed connection and production method Download PDF

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Publication number
CN102866057A
CN102866057A CN2012103853469A CN201210385346A CN102866057A CN 102866057 A CN102866057 A CN 102866057A CN 2012103853469 A CN2012103853469 A CN 2012103853469A CN 201210385346 A CN201210385346 A CN 201210385346A CN 102866057 A CN102866057 A CN 102866057A
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loading frame
concrete
sealing
girder steel
resistance
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CN2012103853469A
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CN102866057B (en
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陶慕轩
聂建国
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Tsinghua University
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Tsinghua University
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Abstract

The invention relates to a loading device for pulling tests of steel-concrete mixed connection and a production method and belongs to the technical field of constructional engineering. The device comprises a closed loading frame, a mixed connection section, a supporting seat and a pusher jack, wherein the mixed connection section comprises a girder section, a connection structure and a concrete clod, the closed loading frame is formed through welding of steel plates, four holes are arranged on the base of the closed loading frame and are fixedly connected to the lower end plate of the girder section through bolts, an upper end plate and a lower end plate are welded on the upper portion and the lower portion of the girder section respectively, the upper end plate is fixedly connected to the lower end of the connection structure, the lower end plate is provided with four holes, the four holes are fixedly connected to the base of the closed loading frame through bolts, the upper end of the connection structure is embedded into the concrete clod, two ends of the concrete clod are supported on the supporting seat respectively, and the pusher jack is arranged at the top of the closed loading frame along the vertical direction. According to the device, defects of a prior device are overcome. The device is simple in structure, convenient to use, universal, applied to pulling tests of all kinds of mixed connection structures and wide in application prospect.

Description

A kind of steel-concrete mixes resistance to plucking experiment loading unit and the method for making that connects
Technical field
The present invention relates to a kind of steel-concrete and mix the resistance to plucking experiment loading unit that connects, belong to technical field of structural engineering, particularly Structural Engineering experimental technique field.
Background technology
Steel-concrete mixes to be connected to have in the engineering practice widely to be used, the connection in the combination beam of the building shown in being connected in the example skyscraper as shown in Figure 1a between concrete core cylinder shear wall and the girder steel, Fig. 1 b and the widespread use of bridge field between concrete flange plate and the girder steel etc.The extraction-resistant behavior that steel-concrete mix to connect is to need a problem extremely being concerned about in the design, and rationally resistance to plucking connects structure and can guarantee steel and concrete collaborative work reliably, gives full play to separately advantage.For example skyscraper adopts framework-Core Walls Structure Mixed Architecture usually, housing guarantees that by mixing interconnection technique both can resist geological process jointly with Core Walls Structure, actual seismic earthquake and large vibration table model test show, housing is connected with mixing between the Core Walls Structure and may bears larger pulling capacity under the geological process, and irrational mixing connects the connection drawing destruction that design causes and can produce to the whole anti-seismic performance of structural system very adverse influence; Steel-concrete composite beam is by web member concrete and girder steel to be linked together for another example, web member is except the opposing interface shear stress, another vital role is exactly resistance to plucking, namely resists the vertical separation that concrete slab causes because of whole longitudinal bending and partial lateral bending and starts.
To steel-concrete mix to connect carry out the resistance to plucking test be research mix connect the drawing force-mechanism, the checking resistance to plucking is constructed rational important means, can be to mix in the Practical Project to connect rationally and reliably resistance to plucking design important scientific basis is provided.Yet traditional mixing connects the resistance to plucking experiment loading unit and test method has the following disadvantages: (1) often needs to design comparatively complicated earth anchor structure in order to resist pulling capacity, and is high to the test site conditional request; (2) need to adopt the push-and-pull lifting jack, phase specific thrust lifting jack, cost is high, take up room large, and it is limited to load tonnage; (3) the test specimen replaceability is poor, and the test specimen of each parameter all need be processed complete unit, time-consuming taking a lot of work, and cost is high, is difficult to realize the experimental study of quantity of parameters; (4) versatility is poor, needs independent design apparatus for different connection structure, therefore installs utilization rate low, causes waste.In view of above reason, mixing at present the resistance to plucking test that connects, to carry out difficulty large, and lacking a large amount of fully reliably test figures provides scientific basis for engineering design.
Summary of the invention
The object of the invention is to for deficiency of the prior art, propose a kind of steel-concrete and mix resistance to plucking experiment loading unit and the method for making that connects.Core concept of the present invention is " turn and draw as pressing ", broken through take pull-out test as main research resistance to plucking and the traditional idea of anchoring property, the pattern that namely loads by pressurized reaches the effect that drawing loads, thereby can effectively avoid complicated earth anchor structure, reduce to take up an area simplified construction; Adopt the thrust lifting jack of traditional economy to reach the purpose that drawing loads, more easily realize heavy load; Adopt fabricated construction, can realize the local fast replacing of test specimen, be conducive to carry out the experimental study of quantity of parameters; This installs highly versatile, can be used for all kinds of mixing and connects the resistance to plucking test of structure and the test of large-tonnage anchoring resistance to plucking etc., has a extensive future.
Technical scheme of the present invention is as follows:
A kind of steel-concrete mixes the resistance to plucking experiment loading unit that connects, and this device comprises the sealing loading frame, mixes linkage section, bearing, thrust lifting jack, and described mixing linkage section comprises the girder steel section, connects structure, concrete block; Described sealing loading frame is formed by Plate Welding, and the bottom plate that its base is provided with four holes and girder steel section is affixed by bolt; Described girder steel section is welded with respectively up and down end plate, and upper head plate is with to be connected the structure lower end affixed, and bottom plate is provided with four holes, and is affixed by bolt with sealing loading frame base; In the Transducers Embedded in Concrete piece of described connection structure upper end, described concrete block two ends are supported on respectively on the bearing; Described thrust lifting jack is along vertically placing sealing loading frame top.
That connection of the present invention structure can be is T-shaped, any structure in peg type, PBL type or the Bar Anchorage type.
Girder steel section of the present invention can be H shaped steel.
The method for making of a kind of resistance to plucking experiment loading unit of the present invention, this method for making may further comprise the steps:
A. Plate Welding is become the sealing loading frame, open in its lower end four with the suitable hole of girder steel section bottom plate;
B. with girder steel section welded end plate respectively up and down, with upper head plate with is connected that to construct the lower end affixed, bottom plate is opened four holes suitable with sealing the loading frame base;
C. connecting structure on every side and upper end assembling reinforcement after-pouring concrete formation concrete block;
D. bottom plate is secured to the base of sealing loading frame by bolt;
E. concrete block is supported at both ends on the bearing;
F. lay the thrust lifting jack at sealing loading frame top.
The present invention has following beneficial effect with respect to prior art:
(1) pattern that loads by pressurized reaches the effect that drawing loads, and realizes " turn and draw as pressing ", thereby can effectively avoid complicated earth anchor structure, reduces to take up an area simplified construction; (2) adopt the thrust lifting jack of traditional economy to reach the purpose that drawing loads, more easily realize heavy load; (3) adopt fabricated construction, can realize the local fast replacing of test specimen, be conducive to carry out the experimental study of quantity of parameters; (4) this device highly versatile can be used for the resistance to plucking test that all kinds of mixing connect structure, has a extensive future.
Description of drawings
Fig. 1 is that typical hybrid common in the Structural Engineering connects example.
Fig. 2 is overall schematic of the present invention.
Fig. 3 is sealing loading frame organigram of the present invention.
Fig. 4 is structure and the manufacturing process schematic diagram of the present invention's mixing linkage section.
Fig. 5 is the connection diagram of the present invention's mixing linkage section and sealing loading frame.
Among the figure: 1-seals loading frame; The 2-perforate; 3-girder steel section; 4-connects structure; The 5-reinforcing bar; The 6-concrete block; The 7-bottom plate; The 8-upper head plate; The 9-bolt; The 10-bearing; 11-thrust lifting jack.
Embodiment
Below in conjunction with accompanying drawing, structure of the present invention, processing and use procedure are further described.
As shown in Figure 2, the inventive system comprises sealing loading frame 1, mixing linkage section, bearing 10 and thrust lifting jack 11.Wherein mix the structure of linkage section as shown in Figure 4, mix linkage section and comprise girder steel section 3, connect structure 4, concrete block 6.
Sealing loading frame 1 is formed by Plate Welding, as shown in Figure 3, its base is provided with four holes 2, pass through bolt 9 affixed (Fig. 5) with the bottom plate 7 of girder steel section 3, its Rigidity and strength needs much larger than connecting structure 4, with guarantee subjects connect structure 4 can be in process of the test failure, to reach the purpose of extraction-resistant behavior test.
Connecting structure 4 is the main object of experimental test, in its upper end Transducers Embedded in Concrete piece 6, can be according to testing requirements varied configurations form (can be any structures such as T-shaped, peg type, PBL type, Bar Anchorage type) and geometric parameter, because it is ever-changing to mix connection structure 4 in the Practical Project, connection structure 4 among Fig. 4 is only illustrated, can change arbitrarily as the case may be in the practical application.
Girder steel section 3 can be a H shaped steel, is welded with respectively up and down end plate 8 and 7, and upper head plate 8 is affixed with the lower end that is connected structure 4, and bottom plate 7 is provided with four holes by bolt 9 and sealing loading frame 1 bottom affixed (Fig. 5).Can be convenient to so the different replacements that mix linkage section.
Concrete block 6 two ends are supported on respectively on the bearing 10.
Thrust lifting jack 11 is along vertically being placed in sealing loading frame 1 top, can apply vertically downward thrust to sealing loading frame 1 top, as shown in Figure 2.
The concrete method for making of apparatus of the present invention is:
At first become sealing loading frame 1 with Plate Welding, thereunder open four with the suitable hole 2 (Fig. 3) of girder steel section 3 bottom plates 7; Processing mixes linkage section (as shown in Figure 4), one shaped steel is distinguished up and down welded end plate (7,8) make the girder steel section, and with upper head plate 8 be connected the structure lower end affixed (shown in Fig. 4 a), connect around the structure and upper end assembling reinforcement 5 (shown in Fig. 4 b), casting concrete forms concrete block 6; Bottom plate 7 is secured on the sealing loading frame 1 (Fig. 5) by bolt 9; At last concrete block 6 is supported at both ends on the bearing 10, and at the vertical placement in edge, sealing loading frame 1 top thrust lifting jack 11 (Fig. 2).
The concrete using method that adopts apparatus of the present invention to carry out the resistance to plucking test is:
Adopt 11 pairs of sealings of thrust lifting jack loading frame, 1 top to apply downward vertical load until mix linkage section failure (Fig. 2), after finishing a kind of connection structure 4 tests of parameter, can only replace and mix linkage section (Fig. 4 c, part shown in the d) also keeps sealing loading frame 1, bearing 10 and thrust lifting jack 11, carry out next connection structure 4 of planting parameter and test.
The invention provides a kind of steel-concrete and mix the resistance to plucking experiment loading unit that connects, can be used for the extraction-resistant behavior that test mixing connects.The pattern that this device loads by pressurized reaches the effect that drawing loads, and realizes " turn and draw as pressing ", thereby effectively avoids complicated earth anchor structure, reduces to take up an area; Adopt the thrust lifting jack of traditional economy to reach the purpose that drawing loads, more easily realize heavy load; Adopt fabricated construction, can realize the local fast replacing of test specimen, be conducive to carry out the experimental study of quantity of parameters; This device has overcome the deficiency of existing device, and simple structure is easy to use, and highly versatile, can be used for the resistance to plucking test that all kinds of mixing connect structure, has a extensive future.

Claims (4)

1. a steel-concrete mixes the resistance to plucking experiment loading unit that connects, and it is characterized in that, this device comprises the sealing loading frame, mixes linkage section, bearing, thrust lifting jack, and described mixing linkage section comprises the girder steel section, connects structure, concrete block; Described sealing loading frame is formed by Plate Welding, and the bottom plate that its base is provided with four holes and girder steel section is affixed by bolt; Described girder steel section is welded with respectively up and down end plate, and upper head plate is with to be connected the structure lower end affixed, and bottom plate is provided with four holes, and is affixed by bolt with sealing loading frame base; In the Transducers Embedded in Concrete piece of described connection structure upper end, described concrete block two ends are supported on respectively on the bearing; Described thrust lifting jack is along vertically placing sealing loading frame top.
2. resistance to plucking experiment loading unit according to claim 1 is characterized in that, that described connection is configured to is T-shaped, any structure in peg type, PBL type or the Bar Anchorage type.
3. resistance to plucking experiment loading unit according to claim 1 is characterized in that, described girder steel section is H shaped steel.
One kind according to claim 1, the method for making of 2 or 3 described resistance to plucking experiment loading units, it is characterized in that, this method for making may further comprise the steps:
A. Plate Welding is become the sealing loading frame, open in its lower end four with the suitable hole of girder steel section bottom plate;
B. with girder steel section welded end plate respectively up and down, with upper head plate with is connected that to construct the lower end affixed, bottom plate is opened four holes suitable with sealing the loading frame base;
C. connecting structure on every side and upper end assembling reinforcement after-pouring concrete formation concrete block;
D. bottom plate is secured to the base of sealing loading frame by bolt;
E. concrete block is supported at both ends on the bearing;
F. lay the thrust lifting jack at sealing loading frame top.
CN201210385346.9A 2012-10-12 2012-10-12 Loading device for pulling tests of steel-concrete mixed connection and production method Active CN102866057B (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103630445A (en) * 2013-11-30 2014-03-12 安徽省(水利部淮河水利委员会)水利科学研究院 Concrete core sample bending testing device
CN104406842A (en) * 2014-12-17 2015-03-11 四川大学 Fixing device applied to tension and pressure vibration fatigue test of components
CN104749030A (en) * 2015-03-25 2015-07-01 河海大学 Concrete anchoring and pulling-out test loader based on electro-hydraulic servo

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB601458A (en) * 1945-04-13 1948-05-06 Carl Abraham Forssell Improvements in apparatus for testing concrete
CN2171110Y (en) * 1993-03-31 1994-07-06 谢先彪 Foundation anchor pile stretching resistance experimental device
CN102134859A (en) * 2010-01-25 2011-07-27 常州市建筑科学研究院有限公司 Uplift resistance test device for pre-stressed pipe pile
CN202994567U (en) * 2012-10-12 2013-06-12 清华大学 Steel-concrete mixing-connecting anti-drawing experiment loading device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB601458A (en) * 1945-04-13 1948-05-06 Carl Abraham Forssell Improvements in apparatus for testing concrete
CN2171110Y (en) * 1993-03-31 1994-07-06 谢先彪 Foundation anchor pile stretching resistance experimental device
CN102134859A (en) * 2010-01-25 2011-07-27 常州市建筑科学研究院有限公司 Uplift resistance test device for pre-stressed pipe pile
CN202994567U (en) * 2012-10-12 2013-06-12 清华大学 Steel-concrete mixing-connecting anti-drawing experiment loading device

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103630445A (en) * 2013-11-30 2014-03-12 安徽省(水利部淮河水利委员会)水利科学研究院 Concrete core sample bending testing device
CN103630445B (en) * 2013-11-30 2016-08-17 安徽省(水利部淮河水利委员会)水利科学研究院 A kind of concrete core sample bending testing device
CN104406842A (en) * 2014-12-17 2015-03-11 四川大学 Fixing device applied to tension and pressure vibration fatigue test of components
CN104406842B (en) * 2014-12-17 2016-08-31 四川大学 A kind of component tension and compression vibrating fatigue fixing device for experiment
CN104749030A (en) * 2015-03-25 2015-07-01 河海大学 Concrete anchoring and pulling-out test loader based on electro-hydraulic servo
CN104749030B (en) * 2015-03-25 2017-06-16 河海大学 A kind of concrete anchoring pull loader based on electric hydraulic servo

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