CN104975726A - Grid structure rod element composite reinforcing method - Google Patents
Grid structure rod element composite reinforcing method Download PDFInfo
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- CN104975726A CN104975726A CN201510318990.8A CN201510318990A CN104975726A CN 104975726 A CN104975726 A CN 104975726A CN 201510318990 A CN201510318990 A CN 201510318990A CN 104975726 A CN104975726 A CN 104975726A
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- steel pipe
- outside steel
- rod element
- grid structure
- rod member
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Abstract
The invention discloses a grid structure rod element composite reinforcing method, and relates to the technical field of reinforcement of a rod element with insufficient grid structure carrying force. The method comprises the following steps of: (1) determining the length of an outside steel pipe according to the specification, the stress, the defects and the like of the grid structure rod element to be reinforced; (2) selecting a steel pipe which is one specification greater than the grid structure rod element to be reinforced as the outside steel pipe, and performing material preparation and splitting according to the length determined in the first step; (3) before the reinforcement, uniformly smearing structural adhesives in the split outside steel pipe; (4) cladding the steel pipe processed in the third step outside the grid structure rod element to be reinforced, installing the outside steel pipe in the middle part of the grid structure rod element to be reinforced, and compactly injecting the structure adhesives between the outside steel pipe and the grid structure rod element to be reinforced without adhesive leakage; and (5) after the structure adhesives are dried and solidified, hooping the outside steel pipe by carbon fiber cloth or a fastening component. The grid structure rod element composite reinforcing method has the advantages that the local rigidity of the grid structure rod element to be reinforced (in a position near the midspan) is enhanced, so that the goal of improving the integral carrying capability of the rod element is achieved.
Description
Technical field
The present invention relates to the reinforcing technique field of rack Lack of support rod member, specifically a kind of rod member for grid composite reinforcing method, mainly for rack overstressing rod member, slenderness ratio deficiency rod member, lengthening bar etc.
Background technology
The research of steel grid structure reinforcement means lags far behind the actual needs of steel grid structure reinforcing, and some new problems occurred in steel grid structure especially at present, just lack suitable method in current specification.Meanwhile, some new technologies, new method are not also applied in Elements of Space Grid Truss is reinforced.Carrying out reinforcing for the rod member not meeting load bearing requirements in Elements of Space Grid Truss is at present both economical and rational selection, and reinforcement mainly increasing section, but cross section increases deadweight also corresponding increase.In addition, when scene is to when being welded with strict restriction or not allowing welding, the application of these reinforcement means is just greatly limited, and causes component unsightly, does not catch up with the needs of social development.
Existing rod member for grid reinforcing technique, adopt welding method outsourcing and treat the method for the isometric steel pipe of reinforcing network hack lever part or angle steel, there is following problem in the method: 1) rod member deadweight increases more, treating that reinforcing network hack lever part is Bao great Yi specification steel pipe or two panels angle steel, cause rod member to be conducted oneself with dignity to increase, if reinforced pole number of packages amount is more, overall structure must be caused to conduct oneself with dignity and to roll up; 2) adopt the method that is welded to connect to original structure by adverse effect, welding heat affected zone is treated the bearing capacity reinforcing rod member for grid and is had certain influence; 3) application of the method has limitation, in a lot of situation, does not allow or do not possess welding condition during structure of modification, such as petrol filling station or oil depot; 4) the method complicated operation, especially needs Site Welding, and the duration is reinforced in impact, is unfavorable for large-scale promotion application; 5) the method mainly relies on the solder technology of workman, and strengthening quality is larger by artifical influence factor.
Summary of the invention
In order to overcome the shortcoming of above-mentioned prior art, the invention provides a kind of rod member for grid composite reinforcing method, allowing reinforcement means become simple and convenient and practical.
The present invention realizes with following technical scheme: a kind of rod member for grid composite reinforcing method, and concrete steps are as follows:
1) for treating reinforcing network hack lever part, curve differential equation is similar to according to depression bar
calculate rod member Buckling Equation
, k
2=F/EI, can calculate the position for the treatment of reinforcing network hack lever part critical strain point according to Buckling Equation, the part between corresponding two critical strain points, for exceeding the position of critical strain, takes outside steel pipe to reinforce to this part; Wherein y is the deflection deformation that compression member is corresponding, and x is compression member calculation level distance initial point length, and F is pressure, and E is modulus of elasticity, and I is dynamic moment of inertia, and A, B are the constant calculated according to fringe conditions;
2) Selection radio treats the steel pipe of the large specification of reinforcing network hack lever part, and the outside steel pipe length according to determining in step 1) is carried out blanking, cut open;
3) structure glue on uniform application in the outside steel pipe cut open;
4) steel pipe after step 3) process wrapped in treat that outside reinforcing network hack lever part, outside steel pipe is arranged on the middle part for the treatment of reinforcing network hack lever part, outside steel pipe and the structure glue treating between reinforcing network hack lever part fill closely knit, must not glue be leaked;
5) after structure glue is solid, outside steel pipe is waled with secure component or carbon cloth.
The invention has the beneficial effects as follows: 1) by calculating the length determining outside steel pipe, make rod member for grid field-hardened technology rationally more scientific; 2) outside steel pipe length is less than and treats reinforcing network hack lever part length, can save material, and reduces because reinforcing the space truss structure deadweight recruitment brought as far as possible; 3) the method on-site consolidation connects, and does not need welding, avoids welding and treats the adverse effect of reinforcing rod member for grid supporting capacity; 4) the method is simple to operate, on-site consolidation, applied widely, can effectively improve reinforcing efficiency; 5) the method effectively can reduce the very different quality control hidden danger brought of operator's technology.
Accompanying drawing explanation
Fig. 1 is operating diagram of the present invention;
Fig. 2 is the A-A sectional view of Fig. 1;
In figure: 1, treat reinforcing network hack lever part, 2, structure glue, 3, outside steel pipe, 4, secure component.
Detailed description of the invention
As depicted in figs. 1 and 2, a kind of rod member for grid composite reinforcing method, concrete steps are as follows:
1) according to treat reinforcing network hack lever part 1 specification, stressed, exist defect etc., determine the length of outside steel pipe; For ensureing consolidation effect, the large 200 ~ 300mm of outside steel pipe length comparable calculated length value;
2) choose than treating that the large specification steel pipe of reinforcing network hack lever part 1 is as outside steel pipe 2, factory by outside steel pipe by calculate determine length blanking, cut open;
3) spread structure glue 3 in the outside steel pipe 2 inwall painting cut open, structure glue 3 should be smeared evenly;
4) in time the steel pipe bag 2 cut open is being treated that, outside reinforcing network hack lever part 1, outside steel pipe should be arranged on the middle part for the treatment of reinforcing network hack lever part 1;
5) outside steel pipe 2 and treat between reinforcing network hack lever part 1 structure glue 3 and should fill closely knit, must not glue be leaked;
6) after structure glue 3 is solid, wale outside steel pipe with secure component 4, making outside steel pipe 2 and wait to reinforce steel pipe 1 can better collaborative work;
7), after having reinforced, check strengthening quality, as undesirable, reprocess in time.
Secure component 4 in step 6) can for being clamp, and the quantity of clamp is determined according to the length of outside steel pipe, and the spacing between two adjacent clamps is not less than 200mm.
The length of outside steel pipe is adopted and is calculated with the following method:
Curve differential equation is similar to according to depression bar
calculate rod member Buckling Equation
, k
2=F/EI, can calculate the position for the treatment of reinforcing network hack lever part critical strain point according to Buckling Equation, the part between corresponding two critical strain points, for exceeding the position of critical strain, takes outside steel pipe to reinforce to this part; Wherein y is the deflection deformation that compression member is corresponding, and x is compression member calculation level distance initial point length, and F is pressure, and E is modulus of elasticity, and I is dynamic moment of inertia, and A, B are the constant calculated according to fringe conditions.
Secure component 4 can be also carbon cloth, wraps up in one deck carbon cloth outside outside steel pipe, plays the effect of constraint outside steel pipe 2.
Conveniently operate, step 2) in steel pipe cut open along the center of circle.
The party's ratio juris is the principle according to compatibility of deformation and stress balance, calculate the length of outside steel pipe, the length of outside steel pipe is less than the length of waiting to reinforce steel pipe, to wait to reinforce steel pipe and outside steel pipe bonding by structure glue, then the fastening outside steel pipe of secure component is used, play the effect of constraint outside steel pipe, making outside steel pipe and wait to reinforce steel pipe can better collaborative work.The object of the method is by increasing the local stiffness (near span centre) treating reinforcing network hack lever part, and then plays the object of the integrated carrying ability increasing rod member.
Claims (5)
1. a rod member for grid composite reinforcing method, is characterized in that: concrete steps are as follows:
1) for treating reinforcing network hack lever part, curve differential equation is similar to according to depression bar
calculate rod member Buckling Equation
, k
2=F/EI, can calculate the position for the treatment of reinforcing network hack lever part critical strain point according to Buckling Equation, the part between corresponding two critical strain points, for exceeding the position of critical strain, takes outside steel pipe to reinforce to this part; Wherein y is the deflection deformation that compression member is corresponding, and x is compression member calculation level distance initial point length, and F is pressure, and E is modulus of elasticity, and I is dynamic moment of inertia, and A, B are the constant calculated according to fringe conditions;
2) Selection radio treats the steel pipe of the large specification of reinforcing network hack lever part, and the outside steel pipe length according to determining in step 1) is carried out blanking, cut open;
3) structure glue on uniform application in the outside steel pipe cut open;
4) steel pipe after step 3) process wrapped in treat that outside reinforcing network hack lever part, outside steel pipe is arranged on the middle part for the treatment of reinforcing network hack lever part, outside steel pipe and the structure glue treating between reinforcing network hack lever part fill closely knit, must not glue be leaked;
5) after structure glue is solid, outside steel pipe is waled with secure component.
2. rod member for grid composite reinforcing method according to claim 1, is characterized in that: described secure component is clamp, and the quantity of clamp is determined according to the length of outside steel pipe, and the spacing between two adjacent clamps is not less than 200mm.
3. rod member for grid composite reinforcing method according to claim 1, is characterized in that: described secure component is carbon cloth.
4. rod member for grid composite reinforcing method according to claim 1, is characterized in that: step 2) in steel pipe cut open along the center of circle.
5. the rod member for grid composite reinforcing method according to any one of claim 1-4, is characterized in that: outside steel pipe length 200 ~ 300mm larger than calculated length value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510318990.8A CN104975726A (en) | 2015-06-12 | 2015-06-12 | Grid structure rod element composite reinforcing method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510318990.8A CN104975726A (en) | 2015-06-12 | 2015-06-12 | Grid structure rod element composite reinforcing method |
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| CN104975726A true CN104975726A (en) | 2015-10-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510318990.8A Pending CN104975726A (en) | 2015-06-12 | 2015-06-12 | Grid structure rod element composite reinforcing method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106351463A (en) * | 2016-10-21 | 2017-01-25 | 中以高新材料（深圳）有限公司 | Carbon fiber preformed reinforcement structure of existing net rack components |
| CN109629903A (en) * | 2018-10-31 | 2019-04-16 | 浙江贝欧复合材料制造有限公司 | A kind of composite material rack bar and its manufacture craft and application |
| CN115450467A (en) * | 2022-10-31 | 2022-12-09 | 贵州大学 | Method for reinforcing pressed steel pipe |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002256709A (en) * | 2001-03-02 | 2002-09-11 | Toshiyuki Kosaka | Earth quake-resistant reinforcing metal bracket with reinforcing sheet and method for attaching it |
| JP2009235730A (en) * | 2008-03-26 | 2009-10-15 | Shimizu Corp | Reinforcing structure for construction |
| CN202324186U (en) * | 2011-10-31 | 2012-07-11 | 武汉市建筑设计院 | Net frame structure |
| CN103774861A (en) * | 2014-01-26 | 2014-05-07 | 淮海工学院 | Reinforcement method for grid structure rod piece |
-
2015
- 2015-06-12 CN CN201510318990.8A patent/CN104975726A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002256709A (en) * | 2001-03-02 | 2002-09-11 | Toshiyuki Kosaka | Earth quake-resistant reinforcing metal bracket with reinforcing sheet and method for attaching it |
| JP2009235730A (en) * | 2008-03-26 | 2009-10-15 | Shimizu Corp | Reinforcing structure for construction |
| CN202324186U (en) * | 2011-10-31 | 2012-07-11 | 武汉市建筑设计院 | Net frame structure |
| CN103774861A (en) * | 2014-01-26 | 2014-05-07 | 淮海工学院 | Reinforcement method for grid structure rod piece |
Non-Patent Citations (2)
| Title |
|---|
| ALAN JENNINGS: "《工程和科学的矩阵算法》", 31 December 1985, 清华大学出版社 * |
| 赵海东等: "上海世博浦西综艺大厅改建工程中的屋面网架加固技术", 《建筑施工》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106351463A (en) * | 2016-10-21 | 2017-01-25 | 中以高新材料（深圳）有限公司 | Carbon fiber preformed reinforcement structure of existing net rack components |
| CN109629903A (en) * | 2018-10-31 | 2019-04-16 | 浙江贝欧复合材料制造有限公司 | A kind of composite material rack bar and its manufacture craft and application |
| CN115450467A (en) * | 2022-10-31 | 2022-12-09 | 贵州大学 | Method for reinforcing pressed steel pipe |
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Application publication date: 20151014 |