CN115467548A - Method for reinforcing lower chord of steel truss gallery - Google Patents
Method for reinforcing lower chord of steel truss gallery Download PDFInfo
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- CN115467548A CN115467548A CN202211013210.5A CN202211013210A CN115467548A CN 115467548 A CN115467548 A CN 115467548A CN 202211013210 A CN202211013210 A CN 202211013210A CN 115467548 A CN115467548 A CN 115467548A
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- steel
- reinforcing
- lower chord
- plate body
- corridor
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 90
- 239000010959 steel Substances 0.000 title claims abstract description 90
- 238000000034 method Methods 0.000 title claims abstract description 31
- 230000003014 reinforcing effect Effects 0.000 title claims abstract description 26
- 238000003466 welding Methods 0.000 claims abstract description 15
- 238000010276 construction Methods 0.000 abstract description 10
- 230000008901 benefit Effects 0.000 abstract description 8
- 230000008569 process Effects 0.000 abstract description 7
- 230000007797 corrosion Effects 0.000 abstract description 6
- 238000005260 corrosion Methods 0.000 abstract description 6
- 238000005452 bending Methods 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 230000009471 action Effects 0.000 description 3
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 239000003351 stiffener Substances 0.000 description 2
- 229910000746 Structural steel Inorganic materials 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
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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
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/38—Connections for building structures in general
- E04B1/58—Connections for building structures in general of bar-shaped building elements
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/38—Connections for building structures in general
- E04B1/58—Connections for building structures in general of bar-shaped building elements
- E04B1/5806—Connections for building structures in general of bar-shaped building elements with a cross-section having an open profile
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/64—Insulation or other protection; Elements or use of specified material therefor for making damp-proof; Protection against corrosion
- E04B1/642—Protecting metallic construction elements against corrosion
-
- 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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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Mechanical Engineering (AREA)
- Rod-Shaped Construction Members (AREA)
Abstract
The invention relates to the technical field of reinforcing of industrial building steel structures, and discloses a method for reinforcing a lower chord of a steel truss corridor. The reinforcing method comprises the following steps: welding channel steel on part of the lower chord between two adjacent cross beams, and buckling the notch of the channel steel below the lower chord; and (3) respectively welding a connecting plate below the end part of each channel steel, and reinforcing the connecting plate and a web plate of the beam through angle steel. The reinforcing method provided by the invention is convenient to install and simple to operate, does not influence the normal production of the belt conveyor in the corridor, does not relate to more complex construction processes such as chiseling and the like, does not have butt welding and damage the original steel members, can ensure that the original lower chord and the newly added member bear force together, obviously improves the bending resistance of the lower chord, effectively solves the problem of insufficient bearing capacity caused by corrosion, overload and the like of the steel truss, and has higher economic benefit and social benefit.
Description
Technical Field
The invention relates to the technical field of industrial building steel structure reinforcement, in particular to a method for reinforcing a bottom chord of a steel truss corridor.
Background
The steel structure vestibule takes charge of the material transportation function, and is an important building in production enterprises of electric power, coal, metallurgy, petrochemical industry and the like.
In recent years, industrial and mining enterprises are in fierce competition, belt conveyors in China are developed towards long distance, high belt speed, large transportation capacity and high power, the steps of capacity expansion and transformation are accelerated, the requirements on construction speed are higher and higher, and steel structures are widely adopted due to the characteristics of light dead weight, high construction speed and small influence of seasons. But steel construction is perishable, and especially in recent years some enterprises because the environmental protection needs, the vestibule is more frequent to the washing water, accelerates steel construction corrosion easily. Meanwhile, the thicknesses of the galleries in older ages are overlapped due to repeated construction of roof and floor waterproof layers, so that the load is over-limited. When the steel truss vestibule bearing capacity is insufficient due to factors such as steel structure corrosion and overload, potential safety hazards are easily caused.
According to the structural characteristics of the steel truss, a web member of the steel truss, a gusset plate, a lower chord and a cross beam (for supporting a floor panel) are intersected at the position of the lower chord node, and an upper flange of the cross beam is connected with a lower flange of the lower chord. When the lower chord needs to be reinforced due to insufficient bearing capacity or corrosion and other factors. The reinforcement mode construction degree of difficulty of embedded angle steel after the local breakage of conventional increase cross-section for example guidance tape is high and great to the damage of primary structure, causes the incident easily.
Disclosure of Invention
In order to solve the technical problem or at least partially solve the technical problem, the invention provides a method for reinforcing the lower chord of the corridor of the steel truss.
The invention provides a method for reinforcing a lower chord of a steel truss corridor, which comprises the following steps:
step S1, welding channel steel on part of a lower chord between two adjacent cross beams, and buckling a notch of the channel steel below the lower chord;
s2, respectively welding connecting plates below the end part of each channel steel;
and S3, reinforcing the web plates of the connecting plate and the cross beam through angle steel.
Optionally, the angle steel includes a first plate body and a second plate body which are vertically connected, the first plate body is attached to the side wall of the connecting plate, the first plate body is connected with the connecting plate through bolts, the second plate body is attached to the web of the beam, and the second plate body is connected with the beam through bolts.
Optionally, the first plate body is connected with the connecting plate through a plurality of bolts, the bolts are arranged at intervals along the length direction of the first plate body, the second plate body is connected with the cross beam through a plurality of bolts, and the bolts are arranged at intervals along the length direction of the second plate body.
Optionally, the bolts on the first plate correspond to the bolts on the second plate one to one.
Optionally, a stiffening rib is arranged on the inner side of the angle steel, and the stiffening rib is perpendicular to the first plate body and the second plate body.
Optionally, the number of the stiffening ribs is multiple, and one stiffening rib is arranged between every two bolts.
Optionally, the stiffening ribs are welded to the angle steel.
Optionally, the width of the channel steel is smaller than that of the lower chord, so that the notch position of the channel steel is in welded connection with the bottom of the lower chord.
Optionally, the cross beam is an i-beam, an upper flange of the i-beam is connected with a lower flange of the lower chord, the i-beam is perpendicular to the lower chord, and ends of the connecting plates are respectively welded to webs of the i-beam corresponding to the connecting plates.
Optionally, angle iron is used to connect the web of the i-steel and the side wall of the web.
Compared with the prior art, the technical scheme provided by the embodiment of the invention has the following advantages:
the reinforcing method provided by the invention is convenient to install and simple to operate, does not influence the normal production of the belt conveyor in the corridor, does not relate to more complex construction processes such as chiseling and the like, does not have butt welding and damage the original steel members, can ensure that the original lower chord and the newly added member bear force together, obviously improves the bending resistance of the lower chord, effectively solves the problem of insufficient bearing capacity caused by corrosion, overload and the like of the steel truss, and has higher economic benefit and social benefit.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
FIG. 1 is a longitudinal cross-sectional view of a reinforced lower chord in accordance with an embodiment of the present invention;
FIG. 2 is a transverse cross-sectional view of a reinforced lower chord according to an embodiment of the present invention.
Description of the reference numerals
1. A cross beam; 2. a lower chord; 3. channel steel; 4. a connecting plate; 5. angle steel; 6. a bolt; 7. a stiffening rib; 8. a gusset plate; 9. a web member.
Detailed Description
In order that the above objects, features and advantages of the present invention may be more clearly understood, a solution of the present invention will be further described below. It should be noted that the embodiments of the present invention and features of the embodiments may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those described herein; it is to be understood that the embodiments described in the specification are only a part of the embodiments of the present invention, and not all of them.
As shown in fig. 1, the steel truss comprises an upper chord (not shown), a lower chord 2 and web members 9 connecting the upper and lower chords 2. The two upper chords are arranged in parallel and connected through a plurality of upper cross beams. The two lower chords 2 are arranged in parallel, and the two lower chords 2 are connected through a plurality of lower cross beams 1. The web members 9 are in a plurality of groups, each group of web members 9 is three, and one of the web members 9 is arranged along the vertical direction in the three web members 9 of each group, and the other two web members 9 are obliquely arranged. Each group of web members 9 is connected with the upper chord member or the lower chord member 2 through a gusset plate 8. As shown in fig. 1, the lower chord 2 is provided with a gusset plate 8, and the bottom ends of the three web members 9 are connected to the gusset plate 8, respectively. Many crossbeams 1 of this application set up in the bottom of lower chord 2, and many crossbeams 1 set up along the extending direction interval of lower chord 2 (only indicate 1 crossbeam 1's the mode of setting in the figure), and crossbeam 1 is relative with gusset plate 8 position on vertical direction.
The method for reinforcing the lower chord of the steel truss corridor provided by the embodiment of the invention comprises the following steps:
step S1, welding channel steel 3 on part of the lower chord 2 between two adjacent cross beams 1, and enabling a notch of the channel steel 3 to be buckled below the lower chord 2.
Specifically, the width of channel-section steel 3 is less than the width of lower chord 2 for the notch position of channel-section steel 3 and the bottom welded connection of lower chord 2, with the design requirement of satisfying the minimum leg of unilateral. Through set up channel-section steel 3 in the below of lower chord 2, the sectional area of multiplicable lower chord 2, and then can show and improve lower chord 2 bending resistance, effectively solve the insufficient problem of bearing capacity that the steel truss arouses because of reasons such as corruption, overload.
And S2, respectively welding a connecting plate 4 below the end part of each channel steel 3, wherein the connecting plate 4 is used for being connected with the cross beam 1.
Specifically, the cross beam 1 is made of i-shaped steel, the upper flange of the i-shaped steel is connected with the lower flange of the lower chord 2, the i-shaped steel is perpendicular to the lower chord 2, and the end portions of the connecting plates 4 are respectively welded to the web plates of the corresponding i-shaped steel so as to be connected with the channel steels 3 on the two sides of the cross beam 1 through the connecting plates 4, so that the overall strength of the structure is ensured. Wherein, the length of the connecting plate 4 needs to meet the requirement of the minimum welding seam length required by equal-strength welding.
This kind of design is through the newly-increased channel-section steel 3 of the position department by the disconnection of crossbeam 1 in 2 bottoms on the lower chord member to link together channel-section steel 3 and crossbeam 1 through connecting plate 4, whole process does not have butt welding and does not cause the damage to original steel member, can guarantee the common atress of former lower chord member 2 and newly-increased steel member.
And S3, reinforcing the web plate of the cross beam 1 and the connecting plate 4 through angle steel 5. Specifically, the angle steel 5 is used for connecting a web plate of the I-steel and a side wall of the connecting plate 4.
Referring to fig. 1 and 2, the angle steel 5 includes a first plate body and a second plate body which are vertically connected, the first plate body is attached to the side wall of the connecting plate 4, the first plate body is connected with the connecting plate 4 through bolts 6 in a penetrating manner, the second plate body is attached to the web plate of the cross beam 1, and the second plate body is connected with the cross beam 1 through bolts 6 in a penetrating manner.
First plate body and connecting plate 4 between be connected through many bolts 6, and many bolts 6 set up along the length direction interval of first plate body, are connected through many bolts 6 between second plate body and the crossbeam 1, and many bolts 6 set up along the length direction interval of second plate body. Wherein, bolt 6 adopts high-strength bolt 6, and the interval of a plurality of high-strength bolts 6 is arranged and is required to satisfy standard construction requirement. The bolts 6 on the first plate body and the bolts 6 on the second plate body are in one-to-one correspondence in a further optimized mode, and subsequent stiffening ribs 7 are convenient to arrange.
In order to prevent the angle steel 5 from being deformed by local instability, a stiffening rib 7 is arranged on the inner side of the angle steel 5, and the stiffening rib 7 is perpendicular to the first plate body and the second plate body. Specifically, there are a plurality of stiffeners 7, and one stiffener 7 is provided between every two bolts 6 to ensure the strength of Gu Gang. The stiffening ribs 7 are welded on the angle steel 5, and preferably, the connection of the stiffening ribs 7 and the angle steel 5 can be carried out by factory welding to increase the working efficiency.
The reinforcing method provided by the invention is convenient to install and simple to operate, does not influence the normal production of the belt conveyor in the corridor, does not relate to more complex construction processes such as chiseling and the like, does not have butt welding and damage the original steel member, can ensure that the original lower chord 2 and a newly added member bear force together, obviously improves the bending resistance of the lower chord 2, effectively solves the problem of insufficient bearing capacity caused by corrosion, overload and the like of a steel truss, and has higher economic benefit and social benefit.
It is noted that, in this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in a process, method, article, or apparatus that comprises the element.
The foregoing are merely exemplary embodiments of the present invention, which enable those skilled in the art to understand or practice the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A method for reinforcing the lower chord of a steel truss corridor is characterized by comprising the following steps:
s1, welding channel steel (3) on part of lower chords (2) between two adjacent cross beams (1), and enabling notches of the channel steel (3) to be buckled below the lower chords (2);
s2, respectively welding a connecting plate (4) below the end part of each channel steel (3);
and S3, reinforcing the web plate of the cross beam (1) and the connecting plate (4) through angle steel (5).
2. The method for reinforcing the chord members of the corridor of the steel truss according to the claim 1, wherein the angle steel (5) comprises a first plate body and a second plate body which are vertically connected, the first plate body is attached to the side wall of the connecting plate (4) and is connected with the connecting plate (4) through a bolt (6), the second plate body is attached to the web plate of the cross beam (1) and is connected with the cross beam (1) through the bolt (6).
3. The method for reinforcing the chord members of the corridor of the steel truss according to the claim 2, wherein the first plate body is connected with the connecting plate (4) through a plurality of bolts (6), the bolts (6) are arranged at intervals along the length direction of the first plate body, the second plate body is connected with the cross beam (1) through the bolts (6), and the bolts (6) are arranged at intervals along the length direction of the second plate body.
4. The method for reinforcing the lower chord of the corridor of steel trusses according to claim 3, wherein the bolts (6) on the first plate body correspond to the bolts (6) on the second plate body one to one.
5. The method for reinforcing the chord members of the corridor of steel trusses according to claim 4, wherein the inside of the angle steel (5) is provided with a stiffening rib (7) and the stiffening rib (7) is perpendicular to the first plate body and the second plate body.
6. The method for reinforcing the chord members of the corridor of steel trusses according to claim 5, wherein the number of the stiffening ribs (7) is plural, and one stiffening rib (7) is provided between every two bolts (6).
7. The method for reinforcing the chord members of the corridor of steel trusses according to claim 6, wherein the stiffening ribs (7) are welded to the angle steels (5).
8. The method for reinforcing the lower chord of the steel truss corridor according to the claim 1, wherein the width of the channel steel (3) is smaller than that of the lower chord (2), so that the notch position of the channel steel (3) is welded with the bottom of the lower chord (2).
9. The method for reinforcing the lower chord of the corridor of the steel truss according to the claim 1, wherein the cross beam (1) is an I-steel, the upper flange of the I-steel is connected with the lower flange of the lower chord (2), the I-steel is perpendicular to the lower chord (2), and the ends of the connecting plates (4) are respectively welded on the web plates of the corresponding I-steel.
10. The method for reinforcing the chord members of the corridor of steel trusses according to claim 9, wherein angle steel (5) is used for connecting the web of the i-steel and the side wall of the connecting plate (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211013210.5A CN115467548A (en) | 2022-08-23 | 2022-08-23 | Method for reinforcing lower chord of steel truss gallery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211013210.5A CN115467548A (en) | 2022-08-23 | 2022-08-23 | Method for reinforcing lower chord of steel truss gallery |
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| Publication Number | Publication Date |
|---|---|
| CN115467548A true CN115467548A (en) | 2022-12-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211013210.5A Pending CN115467548A (en) | 2022-08-23 | 2022-08-23 | Method for reinforcing lower chord of steel truss gallery |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101392600A (en) * | 2007-09-20 | 2009-03-25 | 贵阳铝镁设计研究院 | Trussed-beam steel beam reinforcing structure |
| CN103352578A (en) * | 2013-07-09 | 2013-10-16 | 北京筑福国际工程技术有限责任公司 | Construction method of carbon fiber cloth steel member combination strengthening beam |
| KR20160015101A (en) * | 2014-07-30 | 2016-02-12 | 주식회사 하이브릭스이앤씨 | Methods of increasing the sectional resisting force for negative moment acting at the end part of beam in case of repair or remodeling |
| CN108678417A (en) * | 2018-07-31 | 2018-10-19 | 天津市建筑设计院 | A kind of floor of steel structure transformation node |
| KR102012486B1 (en) * | 2019-03-29 | 2019-08-20 | (주)에이엠에스엔지니어링 | A earthquake proof reinforcement structure possible to install on pilotis construction variably and construction method using the same |
| CN110630015A (en) * | 2019-09-25 | 2019-12-31 | 中国一冶集团有限公司 | Large-span steel bar truss floor support plate assembled support and construction method |
| CN213806733U (en) * | 2020-10-14 | 2021-07-27 | 江苏徐苏新能源科技有限公司 | Novel steel bar truss building carrier plate supports device |
-
2022
- 2022-08-23 CN CN202211013210.5A patent/CN115467548A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101392600A (en) * | 2007-09-20 | 2009-03-25 | 贵阳铝镁设计研究院 | Trussed-beam steel beam reinforcing structure |
| CN103352578A (en) * | 2013-07-09 | 2013-10-16 | 北京筑福国际工程技术有限责任公司 | Construction method of carbon fiber cloth steel member combination strengthening beam |
| KR20160015101A (en) * | 2014-07-30 | 2016-02-12 | 주식회사 하이브릭스이앤씨 | Methods of increasing the sectional resisting force for negative moment acting at the end part of beam in case of repair or remodeling |
| CN108678417A (en) * | 2018-07-31 | 2018-10-19 | 天津市建筑设计院 | A kind of floor of steel structure transformation node |
| KR102012486B1 (en) * | 2019-03-29 | 2019-08-20 | (주)에이엠에스엔지니어링 | A earthquake proof reinforcement structure possible to install on pilotis construction variably and construction method using the same |
| CN110630015A (en) * | 2019-09-25 | 2019-12-31 | 中国一冶集团有限公司 | Large-span steel bar truss floor support plate assembled support and construction method |
| CN213806733U (en) * | 2020-10-14 | 2021-07-27 | 江苏徐苏新能源科技有限公司 | Novel steel bar truss building carrier plate supports device |
Non-Patent Citations (1)
| Title |
|---|
| 赵熙元等: "《建筑钢结构设计手册（下册）》", 冶金工业出版社 * |
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Application publication date: 20221213 |
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