CN111270868A - Reinforced structure based on buckling prevention of main material of power transmission tower - Google Patents
Reinforced structure based on buckling prevention of main material of power transmission tower Download PDFInfo
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- CN111270868A CN111270868A CN202010073037.2A CN202010073037A CN111270868A CN 111270868 A CN111270868 A CN 111270868A CN 202010073037 A CN202010073037 A CN 202010073037A CN 111270868 A CN111270868 A CN 111270868A
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
- E04G23/0218—Increasing or restoring the load-bearing capacity of building construction elements
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
- E04H12/02—Structures made of specified materials
- E04H12/08—Structures made of specified materials of metal
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Abstract
The invention relates to a buckling-preventing reinforcing structure based on a main material of a power transmission tower, which is characterized in that: it is including consolidating angle steel, end fixing part and middle fixing part, consolidate the angle steel and arrange the transmission tower in and wait to consolidate the outside of main material, be the diagonal angle setting with waiting to consolidate the main material, equally divide at the upper end and the lower extreme of consolidating the angle steel and do not set up end fixing part, set up middle fixing part between two end fixing parts, two end fixing parts and middle fixing part will consolidate the angle steel and link firmly as an organic whole with the transmission tower main material. The other connecting positions in the reinforcing section except the connecting end part do not need to be provided with holes on the main material, so that buckling instability of the main material can be prevented; the eccentric amount of the auxiliary main material can be reduced; the end connecting bolt can ensure that the reinforcing angle steel does not slide, and can ensure that the members work together when being pulled; the second angle connector and the floor inside the angle reinforcement can effectively prevent the local instability of the main material angle steel. The method has the advantages of simple construction, safety, reliability, low cost and obvious effect.
Description
Technical Field
The invention belongs to the field of structural engineering, particularly relates to the field of power transmission engineering, and discloses a buckling-preventing reinforced structure based on a main material of a power transmission tower.
Background
The power transmission tower is a main artery which penetrates through a power system longitudinally, basic components of the power transmission tower comprise main materials, oblique materials, auxiliary materials, transverse partition materials, connecting plates and bolts, and the main materials refer to: the angle steel bearing the main stress of the power transmission tower and the material forming the main frame of the tower are arranged on the tower, the diagonal material is a cross material connecting two adjacent main materials, and the components influencing the safety of the power transmission tower mainly comprise the main materials and the diagonal material according to the action of the components on the power transmission tower. Due to the improvement of the designed basic wind speed in recent years, the wind resistance bearing capacity of a plurality of existing power transmission towers cannot meet the requirement of new designed wind speed. For the iron tower which can not meet the working requirements, if a new tower is rebuilt, the cost is overlarge, power failure construction is needed, and the implementation difficulty is very large. According to the conventional transmission line with the damage, the main material of the transmission tower is mostly damaged due to the buckling caused by the pressure, so that the effective buckling-preventing reinforcement of the main material of the transmission tower is very important on the basis of clarifying the damage form of the transmission tower.
In recent years, the reinforcing structure for the power transmission tower mainly comprises three types, namely, a transverse partition surface is additionally arranged. And secondly, increasing the section of the main material. And thirdly, reinforcing the connecting node. After the transverse partition surface is additionally arranged, the joint stress of the main material is reduced to some extent, the external displacement of the inclined material and the auxiliary material of the rod body is greatly reduced, but the joint plate is additionally arranged on the original tower on site, so that the original main material needs to be perforated, the inclined material and the auxiliary material need to be spliced again on site, and the construction difficulty is high. The second kind of structure has increased radius of gyration through promoting sectional area and cross-section moment of inertia to reduced slenderness ratio, this kind of reinforcement structure has improved stability factor and bearing capacity greatly, but has had the reinforcement scheme at present and mostly need trompil connection reinforcement angle steel on former main material, and this structure not only is under construction comparatively loaded down with trivial details and has reduced the bearing capacity of former main material, and the stress concentration phenomenon easily takes place in main material trompil position. The third structure increases the anti-sliding capability in the elastic range of the bolt, can improve the bearing capacity of the connecting node part, but needs to be carried out in the time of power failure maintenance, and the bolt is disassembled, so that the stress distribution of the main material and the inclined material is changed.
At present, the problem to be solved in the field of power transmission engineering is to develop a simple, reliable and convenient-to-operate main material reinforcing structure of a power transmission tower.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the shortcoming of prior art is overcome, provides a reinforced structure based on transmission tower owner material prevents bucking that construction is simple, safe and reliable, need not to open a large amount of bolt holes on former owner material, can guarantee that former owner material and reinforcement angle steel do not produce and slide to can improve the bearing capacity of component, reduce the risk that main material takes place the buckling damage, prevent that the local unstability of main material from destroying.
The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a reinforced structure based on transmission tower owner material prevents bucking which characterized by: it is including consolidating angle steel, tip fixed part and middle fixed part, consolidate the angle steel and arrange the transmission tower in and wait to consolidate the outside of main material, be the diagonal angle setting with waiting to consolidate the main material, equally divide at the upper end and the lower extreme of consolidating the angle steel and do not set up the tip fixed part, set up at least one middle fixed part between two tip fixed parts, two tip fixed parts and at least one middle fixed part will consolidate the angle steel and link firmly as an organic wholely with the transmission tower main material to consolidate the transmission tower main material.
The length of the reinforcing angle steel is the same as that of the main material to be reinforced of the power transmission tower, and the material and the shape number of the reinforcing angle steel are the same as those of the main material to be reinforced of the power transmission tower.
The end fixing part comprises first connecting angle steels and first fastening bolts, the two first connecting angle steels are equally arranged between the main material to be reinforced and the reinforcing angle steel of the power transmission tower respectively and are arranged diagonally, a closed structure is formed in which the main material to be reinforced, the first connecting angle steels, the reinforcing angle steels, the first connecting angle steels and the main material to be reinforced of the power transmission tower are adjacent in sequence, one side of each first connecting angle steel is fixedly connected with the main material to be reinforced of the power transmission tower through the first fastening bolt, and the other side of each first connecting angle steel is fixedly connected with the reinforcing angle steel through the first fastening bolt.
The first fastening bolt is a 10.8-level high-strength bolt.
The middle fixing part comprises second connecting angle steel, second fastening bolts and an anchor ear, the second connecting angle steel is equally arranged between the main material to be reinforced and the reinforcing angle steel of the power transmission tower and is arranged diagonally, a closed structure is formed in which the main material to be reinforced, the second connecting angle steel, the reinforcing angle steel and the main material to be reinforced of the power transmission tower are sequentially adjacent, one side of each second connecting angle steel is fixedly connected with the reinforcing angle steel through the second fastening bolts, the other side of each second connecting angle steel is closely contacted with the main material to be reinforced of the power transmission tower, and the anchor ear is sleeved outside the closed structure formed by the main material to be reinforced, the second connecting angle steel, the reinforcing angle steel, the main material to be reinforced of the power transmission tower, the second connecting angle steel and the main material to be reinforced of the power transmission tower, and the end heads of the main material to be reinforced, the second connecting angle steel and the reinforcing angle steel.
And rib plates are fixedly connected between the second connecting angle steel and the hoop and between the reinforcing angle steel and the hoop respectively, and the material and the thickness of the rib plates are the same as those of the second connecting angle steel.
The staple bolt is two V shaped plates of opposition that link firmly by third fastening bolt, and V shaped plate thickness is the same with the angle steel wall thickness, and V shaped plate oral area sets up the flange, and third fastening bolt wears to adorn on the flange that V shaped plate oral area set up to link firmly as an organic whole with the V shaped plate of opposition.
And the material and the angle steel type of the second connecting angle steel are the same as the main material to be reinforced of the power transmission tower.
The invention has the beneficial effects that:
1, the other connecting positions in the reinforcing section except the connecting end part do not need to be provided with holes on the main material, so that the buckling instability of the main material can be prevented on the basis of ensuring that the original main material is not damaged;
2, the eccentricity of the auxiliary main material can be reduced;
the connecting bolt at the end part 3 can ensure that the reinforcing angle steel does not slide, and simultaneously can ensure that the members work together when being pulled;
4 the local unstability of main material angle steel can effectively be prevented to inside floor of second angle steel and reinforcement angle steel.
The method has the advantages of simple construction, safety, reliability, low cost and obvious effect.
Drawings
Fig. 1 is a schematic structural view of a reinforced structure for preventing buckling based on a main material of a transmission tower according to the present invention after reinforcement;
FIG. 2 is a schematic sectional view taken along line A-A of FIG. 1;
FIG. 3 is a schematic sectional view taken along line B-B of FIG. 1;
fig. 4 is a schematic view of a first connection angle steel structure of the buckling-restrained reinforcing structure based on the main material of the transmission tower according to the present invention;
fig. 5 is a schematic view of a V-shaped plate structure of a hoop of the buckling-restrained reinforcement structure based on a main material of a power transmission tower according to the present invention;
fig. 6 is a schematic view of a second connection angle steel structure of the buckling-restrained reinforcing structure based on the main material of the transmission tower according to the present invention.
In the figure: the power transmission tower comprises a power transmission tower body 1, a main material to be reinforced, end fixing parts 2, a reinforcing angle steel 3, a middle fixing part 4, a first connecting angle steel 5, a first fastening bolt 6, a 7V-shaped plate, a flange 8, a third fastening bolt 9, a rib plate 10, a second fastening bolt 11 and a second connecting angle steel 12.
Detailed Description
The invention is further described below with reference to the accompanying drawings and specific examples.
Example 1, this example is a comparative example of example 2, the length of the angle steel is 1.8m, the material is Q345 steel, and the angle steel which is not reinforced is subjected to one-time axial compression loading.
Referring to fig. 1 to 6, embodiment 2 is a reinforcing structure for preventing buckling based on a main material of a power transmission tower, and the reinforcing structure includes a reinforcing angle steel 3, end fixing parts 2 and middle fixing parts 4, where the reinforcing angle steel 3 is placed outside the main material 1 to be reinforced of the power transmission tower and is diagonally arranged with the main material 1 to be reinforced, the end fixing parts 2 are respectively arranged at the upper end and the lower end of the reinforcing angle steel 3, two middle fixing parts 4 are arranged between the two end fixing parts 2, and the reinforcing angle steel 3 and the main material 1 of the power transmission tower are fixedly connected into a whole by the two end fixing parts 2 and the two middle fixing parts 4, so as to reinforce the main material 1 of the power transmission tower.
The length of the reinforcing angle steel 3 is the same as that of the main material 1 to be reinforced of the power transmission tower, and the material and the shape number of the angle steel are the same as that of the main material 1 to be reinforced of the power transmission tower.
The end fixing part 2 comprises a first connecting angle steel 5 and first fastening bolts 6, the material and the angle steel type of the first connecting angle steel 5 are the same as the main material 1 to be reinforced of the power transmission tower, the length of the first connecting angle steel is 235cm, the first connecting angle steel 5 is equally divided into two parts, the two parts are respectively arranged between the main material 1 to be reinforced of the power transmission tower and the reinforcing angle steel 3 and are arranged diagonally, a closed structure is formed, the main material 1 to be reinforced of the power transmission tower, the first connecting angle steel 5, the reinforcing angle steel 3, the main material 1 to be reinforced of the first connecting angle steel 5 and the power transmission tower are adjacent in sequence, one side of each first connecting angle steel 5 is fixedly connected with the main material 1 to be reinforced of the power transmission tower through four first fastening bolts 6, and the other side of each first connecting angle steel 5 is fixedly connected.
The first fastening bolt 6 is a 10.8-grade high-strength bolt.
The middle fixing part 4 comprises second connecting angle steel 12, second fastening bolts 11 and an anchor ear, wherein the material and the angle steel type of the second connecting angle steel 12 are the same as those of the main material 1 to be reinforced of the power transmission tower, the length of the second connecting angle steel is 70cm, the two second connecting angle steels 12 are uniformly arranged between the main material 1 to be reinforced of the power transmission tower and the reinforcing angle steel 3 respectively and are arranged diagonally to form a closed structure in which the main material 1 to be reinforced of the power transmission tower, the second connecting angle steel 12, the reinforcing angle steel 3, the second connecting angle steel 12 and the main material 1 to be reinforced of the power transmission tower are sequentially adjacent, one edge of each second connecting angle steel 12 is fixedly connected with the reinforcing angle steel 3 through one second fastening bolt 11, the other edge of each second connecting angle steel 12 is tightly contacted with the main material 1 to be reinforced of the power transmission tower, the anchor ear is made of Q345 steel, the length of 125cm, the thickness of the second connecting angle steel is the same as that of, The reinforcement angle steel 3, the second connecting angle steel 12 and the main material 1 to be reinforced of the power transmission tower are sequentially adjacent to form a closed structure, and the ends of the main material 1 to be reinforced of the power transmission tower, the second connecting angle steel 12 and the reinforcement angle steel 3 are hooped.
And rib plates 10 are fixedly connected between the second connecting angle steel 12 and the anchor ear and between the reinforcing angle steel 3 and the anchor ear respectively, and the material and the thickness of the rib plates 10 are the same as those of the second connecting angle steel 12.
The staple bolt comprises two V-shaped plates 7 which are oppositely arranged and fixedly connected by a third fastening bolt 9, the thickness of the V-shaped plate 7 is the same as the wall thickness of angle steel, a flange 8 is arranged at the opening part of the V-shaped plate 7, and the third fastening bolt 9 is arranged on the flange 8 arranged at the opening part of the V-shaped plate 7 in a penetrating way, so that the oppositely arranged V-shaped plates 7 are fixedly connected into a whole.
The present embodiment is manufactured using prior art techniques.
The reinforced angle steel of the embodiment is subjected to a performance test, the length of the angle steel is 1.8m, the material is Q345 steel, and the following points are mainly analyzed:
1) the bearing capacity of the reinforcing member under the reinforcing structure is improved and analyzed;
2) analyzing the rigidity improvement of the reinforcing member under the reinforcing structure;
3) and analyzing the stress of the reinforcing angle steel 3 of the reinforcing member under the reinforcing structure.
The test adopts a loading instrument, namely a YAW-5000F microcomputer control electro-hydraulic servo pressure tester. Considering that certain stress distribution exists in the original power transmission tower angle steel in the actual line reinforcing process and the stress hysteresis phenomenon exists in the reinforced angle steel 3, the test is used for loading the reinforced test piece twice for accurately analyzing the stress condition of the actually reinforced combined member under the reinforcing scheme.
In the test process of the reinforcing member, the end position of the reinforcing angle steel 3 is spliced with the main material 1, the first bolt is placed into the bolt hole but is not screwed, and the main material 1 and the reinforcing angle steel 3 in the middle are not connected completely. The original main material 1 is loaded to 80kn for the first loading, the loading is held until the first fastening bolt 6 is screwed down and the middle fixing part 4 is connected, and then the combined component is loaded for the second time.
Comparative analysis was performed on example 1 and example 2 as follows:
1. bearing capacity analysis
Through extracting test data, the ultimate bearing capacity of the unreinforced angle steel is 281.2kn, the ultimate bearing capacity of the reinforced member is 442.9kn, and the bearing capacity of the reinforced member is improved by 57.50% compared with that of the unreinforced member.
2. Stiffness analysis
The curve analysis extracted from the experimental data shows that the overall stiffness of the steel member is greatly improved before damage, the displacement change is slow along with the increase of the load, and the slope of the curve is small compared with the unadditized angle steel member.
3. Stress analysis of reinforced angle steel 3
The stress condition of the reinforced member is analyzed, so that the stress of the section of the main material 1 on the whole section is larger after the member is reinforced, the stress of the reinforced angle steel 3 is smaller, and the reinforced angle steel 3 mainly plays a role in preventing the main material 1 from generating overall instability.
The present invention is not limited to the present embodiment, and it is possible for those skilled in the art to easily reproduce and modify the present invention without inventive efforts within the scope of the present invention claimed.
Claims (9)
1. The utility model provides a reinforced structure based on transmission tower owner material prevents bucking which characterized by: it is including consolidating angle steel, tip fixed part and middle fixed part, consolidate the angle steel and arrange the transmission tower in and wait to consolidate the outside of main material, be the diagonal angle setting with waiting to consolidate the main material, equally divide at the upper end and the lower extreme of consolidating the angle steel and do not set up the tip fixed part, set up at least one middle fixed part between two tip fixed parts, two tip fixed parts and at least one middle fixed part will consolidate the angle steel and link firmly as an organic wholely with the transmission tower main material to consolidate the transmission tower main material.
2. The buckling-restrained reinforcing structure based on a main material of a transmission tower as set forth in claim 1, wherein: the length of the reinforcing angle steel is the same as that of the main material to be reinforced of the power transmission tower, and the material and the shape number of the reinforcing angle steel are the same as those of the main material to be reinforced of the power transmission tower.
3. The buckling-restrained reinforcing structure based on a main material of a transmission tower as set forth in claim 1, wherein: the end fixing part comprises first connecting angle steels and first fastening bolts, the two first connecting angle steels are equally arranged between the main material to be reinforced and the reinforcing angle steel of the power transmission tower respectively and are arranged diagonally, a closed structure is formed in which the main material to be reinforced, the first connecting angle steels, the reinforcing angle steels, the first connecting angle steels and the main material to be reinforced of the power transmission tower are adjacent in sequence, one side of each first connecting angle steel is fixedly connected with the main material to be reinforced of the power transmission tower through the first fastening bolt, and the other side of each first connecting angle steel is fixedly connected with the reinforcing angle steel through the first fastening bolt.
4. The buckling-restrained reinforcing structure based on a main material of a transmission tower as set forth in claim 3, wherein: the first connecting angle steel is made of the same material and the same angle steel type as a main material to be reinforced of the power transmission tower.
5. The buckling-restrained reinforcing structure based on a main material of a transmission tower as set forth in claim 3, wherein: the first fastening bolt is a 10.8-level high-strength bolt.
6. The buckling-restrained reinforcing structure based on a main material of a transmission tower as set forth in claim 1, wherein: the middle fixing part comprises second connecting angle steel, second fastening bolts and an anchor ear, the second connecting angle steel is equally arranged between the main material to be reinforced and the reinforcing angle steel of the power transmission tower and is arranged diagonally, a closed structure is formed in which the main material to be reinforced, the second connecting angle steel, the reinforcing angle steel and the main material to be reinforced of the power transmission tower are sequentially adjacent, one side of each second connecting angle steel is fixedly connected with the reinforcing angle steel through the second fastening bolts, the other side of each second connecting angle steel is closely contacted with the main material to be reinforced of the power transmission tower, and the anchor ear is sleeved outside the closed structure formed by the main material to be reinforced, the second connecting angle steel, the reinforcing angle steel, the main material to be reinforced of the power transmission tower, the second connecting angle steel and the main material to be reinforced of the power transmission tower, and the end heads of the main material to be reinforced, the second connecting angle steel and the reinforcing angle steel.
7. The buckling-restrained reinforcing structure based on a main material of a transmission tower as set forth in claim 6, wherein: and rib plates are fixedly connected between the second connecting angle steel and the hoop and between the reinforcing angle steel and the hoop respectively, and the material and the thickness of the rib plates are the same as those of the second connecting angle steel.
8. The buckling-restrained reinforcing structure based on a main material of a transmission tower as set forth in claim 6, wherein: the staple bolt is two V shaped plates of opposition that link firmly by third fastening bolt, and V shaped plate thickness is the same with second angle connector wall thickness, and V shaped plate oral area sets up the flange, and third fastening bolt wears to adorn on the flange that V shaped plate oral area set up to link firmly as an organic whole with the V shaped plate of opposition.
9. The buckling-restrained reinforcing structure based on a main material of a transmission tower as set forth in claim 6, wherein: and the material and the angle steel type of the second connecting angle steel are the same as the main material to be reinforced of the power transmission tower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010073037.2A CN111270868A (en) | 2020-01-22 | 2020-01-22 | Reinforced structure based on buckling prevention of main material of power transmission tower |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010073037.2A CN111270868A (en) | 2020-01-22 | 2020-01-22 | Reinforced structure based on buckling prevention of main material of power transmission tower |
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| CN111270868A true CN111270868A (en) | 2020-06-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010073037.2A Pending CN111270868A (en) | 2020-01-22 | 2020-01-22 | Reinforced structure based on buckling prevention of main material of power transmission tower |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022205261A1 (en) * | 2021-04-01 | 2022-10-06 | 大连理工大学 | Porous steel-clad type non-power-failure reinforcing device of power transmission tower main material |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207004146U (en) * | 2017-07-26 | 2018-02-13 | 广州大学 | A kind of bracing means for high voltage power transmission angle steel tower principal post angle steel |
| CN208137481U (en) * | 2017-09-30 | 2018-11-23 | 广东电网有限责任公司电力科学研究院 | A kind of oblique material bracing means of power transmission tower angle steel |
| CN208168424U (en) * | 2018-04-26 | 2018-11-30 | 广东电网有限责任公司电力科学研究院 | A kind of power transmission tower angle steel main material bracing means |
| CN208441504U (en) * | 2018-06-07 | 2019-01-29 | 广东省输变电工程有限公司 | Power transmission tower cross bracing means |
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2020
- 2020-01-22 CN CN202010073037.2A patent/CN111270868A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207004146U (en) * | 2017-07-26 | 2018-02-13 | 广州大学 | A kind of bracing means for high voltage power transmission angle steel tower principal post angle steel |
| CN208137481U (en) * | 2017-09-30 | 2018-11-23 | 广东电网有限责任公司电力科学研究院 | A kind of oblique material bracing means of power transmission tower angle steel |
| CN208168424U (en) * | 2018-04-26 | 2018-11-30 | 广东电网有限责任公司电力科学研究院 | A kind of power transmission tower angle steel main material bracing means |
| CN208441504U (en) * | 2018-06-07 | 2019-01-29 | 广东省输变电工程有限公司 | Power transmission tower cross bracing means |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2022205261A1 (en) * | 2021-04-01 | 2022-10-06 | 大连理工大学 | Porous steel-clad type non-power-failure reinforcing device of power transmission tower main material |
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