CN109403543A - A kind of large-sized station boiler large girder end shear connections structure and its assembly method - Google Patents
A kind of large-sized station boiler large girder end shear connections structure and its assembly method Download PDFInfo
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- CN109403543A CN109403543A CN201811470274.1A CN201811470274A CN109403543A CN 109403543 A CN109403543 A CN 109403543A CN 201811470274 A CN201811470274 A CN 201811470274A CN 109403543 A CN109403543 A CN 109403543A
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- large girder
- girder
- resistant slide
- slide plate
- underbeam
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
- E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P21/00—Machines for assembling a multiplicity of different parts to compose units, with or without preceding or subsequent working of such parts, e.g. with programme control
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses large-sized station boiler large girder end shear connections structure and its assembly methods, it is arranged symmetrically resistant slide plate above and below the large girder superposed surfaces that large girder upper beam and large girder underbeam are formed and along the web of large girder, shearing bolt is arranged to be connected to form the large girder end shear connections structure across resistant slide plate with large girder superposed surfaces.Large girder upper beam, large girder underbeam and resistant slide plate are carried out whole brill of matching to process, be transported to after on-site hoisting and resistant slide plate is tightened to the large girder superposed surfaces that large girder upper beam and large girder underbeam are formed or more by shearing bolt column before carrying and is arranged symmetrically to form large girder end shear connections structure along the web of large girder.The present invention increases rubbing surface number in the resistant slide of the increase up and down plate of former large girder end superposed surfaces, improves the shear-carrying capacity of frictional high-strength bolts, meets the requirement of large girder end shear-carrying capacity.
Description
Technical field
The present invention relates to the technical fields of station boiler, more particularly, are related to a kind of large-sized station boiler large girder end
Portion's shear connections structure and its assembly method.
Background technique
Conventional large-sized station boiler large girder stoplog height nearly 9m, remote super generating transport size, thus common practice be will be big
Plate-girder is split as upper beam and underbeam along short transverse, in order to resist the sliding after upper and lower load bearing beam between superposed surfaces (such as Figure 1A institute
Show), underbeam superposed surfaces arrange 4~6 column high-strength bolts along the direction beam length L to transmit Transverse Shear usually in large girder height
Power, to resist the sliding between upper underbeam, this structure is referred to as the shear connections structure (as illustrated in figures ib and 1 c) of large girder.
But as station boiler further develops to the direction of high parameter, large capacity, the loading of boiler body is increasing,
The shearing of large girder end section is also increasing.By taking 1000MW π type double reheat boiler as an example, K4 large girder end shearing is set
Evaluation is difficult to meet shear-carrying capacity requirement up to 5200 tons using the plane connection structure that singly rubs shown in Figure 1B.
According to Shear Lag Effect and specialize in the result shows that: if the width for widening upper underbeam superposed surfaces increases again
Add bolt to arrange, can not guarantee that multiple row bolt equilibrium carries；The bolt column that actual conditions are proximate to web assume responsibility for more
Transverse shearing force, and it is smaller to arrange the transverse shearing force that it undertakes further away from the bolt of web.That is, only by the number of increase Bolt
Amount is difficult to meet the shear-carrying capacity requirement of bolt, and the bolt column that may cause instead close to web undertake larger shearing generation first
It destroys.
Summary of the invention
In order to solve the problems in the existing technology, the object of the present invention is to provide one kind by increasing rubbing surface quantity
The structure type of frictional high-strength bolts shear-carrying capacity is improved, it is not only economical but also simply solve large girder end and sheared
Big and high-strength bolt difficult arrangement technical problem.
An aspect of of the present present invention provides large-sized station boiler large girder end shear connections structure, in large girder upper beam and
The large girder superposed surfaces that large girder underbeam is formed have been arranged symmetrically resistant slide plate, shearing bolt up and down and along the web of large girder
Column connect to form the large girder end shear connections structure across the resistant slide plate with large girder superposed surfaces.
One embodiment of large-sized station boiler large girder end shear connections structure according to the present invention, on the large girder
Beam and large girder underbeam are structural I-beam and include upper flange, lower wing plate and intermediate vertical web, the large girder
Superposed surfaces are overlapped and are formed by the lower wing plate of large girder upper beam and the upper flange of large girder underbeam.
One embodiment of large-sized station boiler large girder end shear connections structure, resistant slide plate include according to the present invention
Upper resistant slide plate and lower resistant slide plate, the upper resistant slide plate are arranged in above the lower wing plate of large girder upper beam, the lower antiskid
It moves plate to be arranged in below the upper flange of large girder underbeam, the shearing bolt is arranged across the upper resistant slide plate, large girder upper beam
Lower wing plate, large girder underbeam upper flange and lower resistant slide plate and connect form the large girder end shear connections structure
One embodiment of large-sized station boiler large girder end shear connections structure according to the present invention, the upper resistant slide
Plate includes the resistant slide plate on web two sides and two pieces of sons being arranged symmetrically, and the lower resistant slide plate includes being located at web two sides
And resistant slide steel plate under two pieces of sons being arranged symmetrically.
One embodiment of large-sized station boiler large girder end shear connections structure according to the present invention, the shearing bolt
Be classified as 4~6 column and along the width direction of large girder arrange, each column shearing bolt column include multiple shearing bolts and along
The length direction of large girder is arranged.
One embodiment of large-sized station boiler large girder end shear connections structure according to the present invention, the resistant slide plate
It is arranged in the end section of large girder or is arranged along the length direction overall length of large girder.
Another aspect provides the assembly sides of above-mentioned large-sized station boiler large girder end shear connections structure
Method, the assembly method the following steps are included:
Large girder upper beam, large girder underbeam and resistant slide plate are carried out whole with brill processing；
After being transported to on-site hoisting, before carrying by resistant slide plate by shearing bolt column be tightened to large girder upper beam and
The large girder superposed surfaces that large girder underbeam is formed are arranged symmetrically up and down and along the web of large girder, form the large girder end
Shear connections structure.
One embodiment of the assembly method of large-sized station boiler large girder end shear connections structure according to the present invention, institute
The inspection of raw and process materials, blanking, processing of rust removing, rubbing surface sandblasting Shot Blasting and large girder entirety need to successively be carried out by stating resistant slide plate
With the procedure of processing for boring working process and non-rubbing surface painting treatment.
Compared with prior art, large-sized station boiler large girder of the present invention end shear connections structure and its assembly method exist
The resistant slide plate of increase up and down of former large girder end superposed surfaces improves frictional high-strength bolts to increase rubbing surface number
Shear-carrying capacity neither increases bolt specification nor increases bolt quantity, can but improve the bearing capacity of bolt three times, meet big plate
The requirement of beam end shear-carrying capacity.
Detailed description of the invention
Figure 1A shows the sliding situation schematic diagram of large girder in the prior art, and Figure 1B shows large girder in the prior art
Upper underbeam superposed surfaces use the resistant slide connection structure main view of single rubbing surface form, and Fig. 1 C shows large girder in the prior art
Upper underbeam superposed surfaces use the resistant slide connection structure side view of single rubbing surface form.
Fig. 2 shows large-sized station boiler large girder according to an exemplary embodiment of the present invention end shear connections structures
Schematic view of the front view.
Fig. 3 shows large-sized station boiler large girder according to an exemplary embodiment of the present invention end shear connections structure
Side structure schematic view.
Fig. 4 shows large-sized station boiler large girder according to an exemplary embodiment of the present invention end shear connections structure
Action principle figure.
Description of symbols:
1- large girder upper beam, the lower wing plate of 1-1- large girder upper beam, 2- large girder underbeam, 2-1- large girder underbeam upper limb
Plate, 3- large girder superposed surfaces, 4- web, 5- shearing bolt column, antiskid under resistant slide plate, 7- on the upper resistant slide plate of 6-, 6-1-
Move resistant slide plate under plate, 7-1-.
Specific embodiment
All features disclosed in this specification or disclosed all methods or in the process the step of, in addition to mutually exclusive
Feature and/or step other than, can combine in any way.
Any feature disclosed in this specification unless specifically stated can be equivalent or with similar purpose by other
Alternative features are replaced.That is, unless specifically stated, each feature is an example in a series of equivalent or similar characteristics
?.
In view of the above technical problems, the invention proposes the resistant slide steel plates of increase up and down in former large girder end superposed surfaces
Increase rubbing surface number, improves the structure type of frictional high-strength bolts shear-carrying capacity, it is not only economical but also simply solve
Large girder end shears excessive, the technical problem of high-strength bolt difficult arrangement.
Technical solution of the present invention is specifically described and is illustrated below.
As station boiler further develops to the direction of high parameter, large capacity, the loading of boiler body is increasing, greatly
The shearing of plate-girder end is also increasing.By taking 1000MW π type double reheat boiler as an example, K4 large girder end shearing force design value reaches
It 5200 tons, is connected using list rubbing surface shown in Figure 1B with Fig. 1 C and is difficult to meet shear-carrying capacity requirement.
According to Shear Lag Effect principle, increase bolt column by widening the width of upper underbeam superposed surfaces merely, it can not
Enough guarantee multiple row bolt equilibrium carrying；The bolt column that actual conditions are proximate to web assume responsibility for more transverse shearing force, and separate
The transverse shearing force that the bolt column of web undertake is smaller.That is, the method for increasing bolt number of columns is difficult to meet Bolt
Shear-carrying capacity requirement, the bolt column that may cause close web instead undertake larger shearing and first destroy.
According to the calculation formula of following stoplog end bolt number, the large girder section for being Q to shearing, superposed surfaces bolt sum
N will meet following formula:
In formula, μ is rubbing surface anti-slip coefficient, and μ is definite value after large girder material determines；P is the high-strength of different size
The Prestress design value of bolt, increases with the increase of bolt specification；K is that pass coefficient takes k=1 to circular hole.Therefore, from
Above formula is not difficult to find out, to reduce the high-strength bolt quantity of large girder superposed surfaces, first is that increasing bolt specification, improves pretightning force P,
But the high-strength bolt of current maximum specification has used M30, and the oversized high-strength bolt more than M30, performance is unstable, design
Specification does not provide Prestress design value yet, therefore increases bolt specification and do not have feasibility；Second is that increasing the number of rubbing surface
nf, large girder stoplog is single rubbing surface structure, n at presentF=1, as illustrated in figures ib and 1 c.
Therefore, according to the loading characteristic of large girder, king-sized section is being sheared, is being considered as increasing above and below former superposed surfaces
Add the scheme of resistant slide plate, so that former high-strength bolt becomes three rubbing surfaces by single rubbing surface, improves 3 times of bearing capacity, it is this to do
Method economy is simple and is easily achieved.
Fig. 2 shows large-sized station boiler large girder according to an exemplary embodiment of the present invention end shear connections structures
Schematic view of the front view, Fig. 3 show large-sized station boiler large girder according to an exemplary embodiment of the present invention end shearing resistance company
The side structure schematic view of binding structure.
As shown in Figures 2 and 3, an exemplary embodiment of the present invention, large-sized station boiler large girder end of the invention
Portion's shear connections structure is specifically in large girder upper beam 1 and about the 3 large girder superposed surfaces of the formation of large girder underbeam 2 and along big plate
The web 4 of beam has been arranged symmetrically resistant slide plate, and shearing bolt column 5 pass through resistant slide plate and the connection of large girder superposed surfaces 3 forms this
The large girder end shear connections structure of invention.
Wherein, large girder upper beam 1 and large girder underbeam 2 be structural I-beam and include upper flange, lower wing plate and in
Between vertical web 4, large girder superposed surfaces 3 overlap by the lower wing plate 1-1 of large girder upper beam and the upper flange 2-1 of large girder underbeam
It is formed.
Resistant slide plate of the invention includes upper resistant slide plate 6 and lower resistant slide plate 7, and upper resistant slide plate 6 is arranged in large girder
Above the lower wing plate 1-1 of upper beam, lower resistant slide plate 7 is arranged in below the upper flange 2-1 of large girder underbeam, and shearing bolt column 5 are worn
It crosses resistant slide plate 6, the lower wing plate 1-1 of large girder upper beam, the upper flange 2-1 of large girder underbeam and lower resistant slide plate 7 and connects
It connects to form above-mentioned large girder end shear connections structure.
In order to form balanced frictional force, upper resistant slide plate 6 includes on 4 two sides of web and two pieces of sons being arranged symmetrically
Resistant slide plate 6-1, lower resistant slide plate 7 include the resistant slide steel plate 7-1 under 4 two sides of web and two pieces of sons being arranged symmetrically.
Shearing bolt is arranged, shearing bolt column 5 are 4~6 column and arrange along the width direction of large girder that each column is anti-
Bolt column are cut to include multiple shearing bolts and arrange along the length direction of large girder.Wherein, shearing bolt is the high-strength spiral shell of M30
Bolt.
Theoretically, resistant slide plate can be penetrated through along the length direction overall length of large girder and be arranged, but should mainly be considered big
Plate-girder shears king-sized end section installation, other sections determine whether to install after should being calculated according to shear-carrying capacity.
Fig. 4 shows large-sized station boiler large girder according to an exemplary embodiment of the present invention end shear connections structure
Action principle figure.
As shown in figure 4, after large girder starts carrying, the lower wing plate 1-1 of large girder upper beam and the upper limb of large girder underbeam
Plate 2-1 will have the tendency that opposite sliding, constitute a pair of of rubbing surface；In addition, the upper resistant slide plate 6 that is newly increased in the present invention and lower anti-
Sliding plate 7 produces between superposed surfaces due to being tightened in large girder superposed surfaces before carrying with high-strength shearing bolt column
Pressing force is given birth to, when superposed surfaces sliding, upper resistant slide plate 6 and lower resistant slide plate 7 are respectively relative to superposed surfaces and have holding up and down
Stationary trend, therefore superposed surfaces also have sliding trend relative to upper resistant slide plate 6 and lower resistant slide plate 7 respectively, constitute
Friction pair, therefore the structure has newly increased two rubbing surfaces, forms 3 rubbing surfaces altogether, then nf=3.Then according to formula 1, every
3 times of the bearing power increase of high-strength shearing bolt, the shear-carrying capacity of large girder end height shearing section improves three times.And
And 3 rubbing surfaces have been the ultimate bearings of large girder stoplog, then to the upper and lower increase of resistant slide plate by friction surface treatment
Steel plate cannot have been recurred to the effect for increasing rubbing surface because newly-increased resistant slide plate can not generate phase with original resistant slide plate
Anti- tendency toward sliding does not constitute new friction pair.
Therefore, the solution of the present invention can farthest realize the promotion of shear-carrying capacity, without increasing bolt specification
With bolt quantity, the bearing capacity of bolt three times can be but improved, meets the requirement of large girder end shear-carrying capacity.If not using
This method then needs to add and sets boiler colonnade, additionally increases more steel.By taking GE company, the U.S. as an example, 600MW or more unit
In order to evade domestic large girder stoplog technical patent, spy adds additional a colonnade, and steel construction dosage is caused to rise more than 1,000 tons.
The present invention can effectively contain rival using conventional single rubbing surface stoplog design large capacity, the large girder of high parameter boiler.
When assembling to above-mentioned large-sized station boiler large girder end shear connections structure, assembly method is specifically included
Following steps:
Large girder upper beam 1, large girder underbeam 2 and resistant slide plate (including upper resistant slide plate 6 and lower resistant slide plate 7) are carried out
It is whole to be processed with brill, it is concentric with bolt hole when guaranteeing in-site installation.After large girder is transported to on-site hoisting, it will resist before carrying
Sliding plate (upper resistant slide plate 6 and lower resistant slide plate 7) is tightened to large girder upper beam 1 and large girder by shearing bolt column 5
Underbeam 2 formed about 3 large girder superposed surfaces and be arranged symmetrically along the web of large girder 4, form large girder end of the invention
Portion's shear connections structure.
In order to guarantee the resistant slide effect of resistant slide plate, resistant slide plate of the present invention need to successively carry out raw material inspection
It tests, blanking, processing of rust removing, rubbing surface sandblasting Shot Blasting, integrally match with large girder and bore at working process and non-rubbing surface coating
It the procedure of processing of reason and then is assembled with large girder.For proof strength, resistant slide plate is preferably high-strength steel sheet.
In conclusion the present invention by the resistant slide plate of increase up and down in former large girder end superposed surfaces, rubs to increase
Wiping face number improves the shear-carrying capacity of frictional high-strength bolts, neither increases bolt specification nor increases bolt quantity, but can
The bearing capacity for improving bolt three times, meets the requirement of large girder end shear-carrying capacity.
The invention is not limited to specific embodiments above-mentioned.The present invention, which expands to, any in the present specification to be disclosed
New feature or any new combination, and disclose any new method or process the step of or any new combination.
Claims (8)
1. a kind of large-sized station boiler large girder end shear connections structure, which is characterized in that in large girder upper beam and large girder
The large girder superposed surfaces that underbeam is formed have been arranged symmetrically resistant slide plate up and down and along the web of large girder, shearing bolt arrange across
The resistant slide plate connects to form the large girder end shear connections structure with large girder superposed surfaces.
2. large-sized station boiler large girder end shear connections structure according to claim 1, which is characterized in that the big plate
Beam upper beam and large girder underbeam are described big for structural I-beam and including upper flange, lower wing plate and intermediate vertical web
Plate-girder superposed surfaces are overlapped and are formed by the lower wing plate of large girder upper beam and the upper flange of large girder underbeam.
3. large-sized station boiler large girder end shear connections structure according to claim 2, which is characterized in that resistant slide plate
Including upper resistant slide plate and lower resistant slide plate, the upper resistant slide plate is arranged in above the lower wing plate of large girder upper beam, under described
Resistant slide plate is arranged in below the upper flange of large girder underbeam, and the shearing bolt is arranged across the upper resistant slide plate, large girder
The lower wing plate of upper beam, the upper flange of large girder underbeam and lower resistant slide plate and connect form large girder end shear connections
Structure.
4. large-sized station boiler large girder end shear connections structure according to claim 3, which is characterized in that described anti-
Sliding plate includes the resistant slide plate on web two sides and two pieces of sons being arranged symmetrically, and the lower resistant slide plate includes being located at web
Resistant slide steel plate under two sides and two pieces of sons being arranged symmetrically.
5. large-sized station boiler large girder end shear connections structure according to claim 1, which is characterized in that the shearing resistance
Bolt be classified as 4~6 column and along the width direction of large girder arrange, each column shearing bolt column include multiple shearing bolts and
It is arranged along the length direction of large girder.
6. large-sized station boiler large girder end shear connections structure according to claim 1, which is characterized in that the antiskid
Plate is moved to be arranged in the end section of large girder or arrange along the length direction overall length of large girder.
7. the assembly method of large-sized station boiler large girder end shear connections structure as described in any one of claims 1 to 6,
It is characterized in that, the assembly method the following steps are included:
Large girder upper beam, large girder underbeam and resistant slide plate are carried out whole with brill processing；
After being transported to on-site hoisting, resistant slide plate is tightened to large girder upper beam and big plate by shearing bolt column before carrying
The large girder superposed surfaces that beam underbeam is formed are arranged symmetrically up and down and along the web of large girder, form large girder end shearing resistance
Connection structure.
8. the assembly method of large-sized station boiler large girder end shear connections structure, feature exist according to claim 7
In the resistant slide plate need to successively carry out the inspection of raw and process materials, blanking, processing of rust removing, rubbing surface sandblasting Shot Blasting and large girder
The whole procedure of processing with brill working process and non-rubbing surface painting treatment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811470274.1A CN109403543A (en) | 2018-11-28 | 2018-11-28 | A kind of large-sized station boiler large girder end shear connections structure and its assembly method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811470274.1A CN109403543A (en) | 2018-11-28 | 2018-11-28 | A kind of large-sized station boiler large girder end shear connections structure and its assembly method |
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| CN109403543A true CN109403543A (en) | 2019-03-01 |
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| CN201811470274.1A Pending CN109403543A (en) | 2018-11-28 | 2018-11-28 | A kind of large-sized station boiler large girder end shear connections structure and its assembly method |
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Citations (6)
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| JP2003130014A (en) * | 2001-10-23 | 2003-05-08 | Kobe Steel Ltd | Bolt friction bonding method and filler material for bolt friction bonding |
| CN101135190A (en) * | 2007-09-03 | 2008-03-05 | 江苏美凯龙钢业有限公司 | Method for preparing plate assembly composite spliced beam |
| CN102943546A (en) * | 2012-11-26 | 2013-02-27 | 上海交通大学 | Main girder for boiler steel structure |
| CN204589832U (en) * | 2015-03-05 | 2015-08-26 | 湖南省永龙高速公路建设开发有限公司 | The high roadbed corrugated steel culvert of splicing construction is strengthened with hoop |
| CN108894359A (en) * | 2018-05-28 | 2018-11-27 | 昆明理工大学 | A kind of shear wall structure of friction energy-dissipating |
| CN209369168U (en) * | 2018-11-28 | 2019-09-10 | 东方电气集团东方锅炉股份有限公司 | A kind of large-sized station boiler large girder end shear connections structure |
-
2018
- 2018-11-28 CN CN201811470274.1A patent/CN109403543A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003130014A (en) * | 2001-10-23 | 2003-05-08 | Kobe Steel Ltd | Bolt friction bonding method and filler material for bolt friction bonding |
| CN101135190A (en) * | 2007-09-03 | 2008-03-05 | 江苏美凯龙钢业有限公司 | Method for preparing plate assembly composite spliced beam |
| CN102943546A (en) * | 2012-11-26 | 2013-02-27 | 上海交通大学 | Main girder for boiler steel structure |
| CN204589832U (en) * | 2015-03-05 | 2015-08-26 | 湖南省永龙高速公路建设开发有限公司 | The high roadbed corrugated steel culvert of splicing construction is strengthened with hoop |
| CN108894359A (en) * | 2018-05-28 | 2018-11-27 | 昆明理工大学 | A kind of shear wall structure of friction energy-dissipating |
| CN209369168U (en) * | 2018-11-28 | 2019-09-10 | 东方电气集团东方锅炉股份有限公司 | A kind of large-sized station boiler large girder end shear connections structure |
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