CN207892265U - The inner equilibrium steel member of Prestressed CFRP plate enhancing - Google Patents
The inner equilibrium steel member of Prestressed CFRP plate enhancing Download PDFInfo
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- CN207892265U CN207892265U CN201721748765.9U CN201721748765U CN207892265U CN 207892265 U CN207892265 U CN 207892265U CN 201721748765 U CN201721748765 U CN 201721748765U CN 207892265 U CN207892265 U CN 207892265U
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Abstract
The utility model discloses a kind of inner equilibrium steel member of Prestressed CFRP plate enhancing, the inner equilibrium steel member of the Prestressed CFRP plate enhancing includes：Steel member ontology；CFRP plates, the CFRP plates are arranged symmetrically in the outer surface of the steel member ontology；Connector is connected by the connector with the steel member ontology after the CFRP plates tensioning.The inner equilibrium steel member of Prestressed CFRP plate enhancing according to the present utility model by the way that Prestressed CFRP plate is arranged in the outer surface of steel member ontology, and is connected by connector with steel member ontology after making CFRP plate tensioning.Thus, the principle of tensioning state is under pretension using the CFRP plates of disalignment, the advantage of CFRP tensions is effectively played, effectively increases the rigidity of the steel member ontology, improve its axis pressure, bias, tension, by curved bearing capacity, also improve its axis pressure, bias overall stability.
Description
Technical field
The utility model belongs to structure of steel product technical field, and in particular to a kind of inner equilibrium steel of Prestressed CFRP plate enhancing
Component.
Background technology
Buckling unstable failure is a kind of principal mode that steel structure member destroys, and is generally occurred within relatively suddenly, can be caused relatively tight
The loss of weight.In the engineering history of countries in the world, accident caused by due to strut buckling destroys is commonplace, such as：In 1907
Quebec, CAN bridge collapses, the Hart Ford city Gymnasium structure of the U.S. in 1978 collapse and 2008 at the beginning of
The a large amount of of head tower that transmit electricity in south China ice disaster are collapsed.In recent years, China steel construction have developed rapidly, due to lacking experience
Or excessively high pursuit economy, there are many lower structures of stability bearing capacity safety stock, or even there are some that unstability has occurred
It destroys；Also some structures because working load raising, corrosion failure, construction error etc. reasons also result in stable structure bearing capacity
It is insufficient.
With the increase year by year of China's steel construction construction scale, the demand reinforced to this kind of steel construction will be increasingly stronger
It is strong.Domestic a large amount of transmission of electricity head tower is urgently reinforced, but most head towers are in the wild, have inconvenient traffic, lack suitable reinforcing side
Method, thus there is an urgent need to research and develop construction is simple, with material is light, effective steel structure strengthening technology, to improve important engineering
Reliability of structure.
Currently, the main method reinforced to steel construction in Practical Project has component to replace, mitigates load, changes structure
System, increasing member section and bonding strength, prestressed cable etc. have however, the above method has its applicable elements and range
A little is difficult the requirement for meeting construction and using, such as cannot dismantle, be unable to open fire；Some can bring new problem to structure, such as
Local damage, residual stress etc..
Utility model content
The utility model aims to solve at least one of the technical problems existing in the prior art.For this purpose, the utility model carries
Go out a kind of inner equilibrium steel member of Prestressed CFRP plate enhancing, the inner equilibrium steel member of the Prestressed CFRP plate enhancing is conveniently applied
It work and is easily assembled.
According to the inner equilibrium steel member that the Prestressed CFRP plate of the utility model embodiment enhances, including：Steel member ontology；
CFRP plates, the CFRP plates are arranged symmetrically in the outer surface of the steel member ontology；Connector leads to after the CFRP plates tensioning
It crosses the connector with the steel member ontology to be connected, wherein the CFRP plates tensioning is placed on the outer of the steel member ontology
Surface, enlarged cross section is not accumulated substantially, lateral in steel member ontology using the CFRP plates of disalignment under compression or Eccentric Load
Convex surface is in the principle of tensioning state when deformation, ensures during the steel member ontology compressive buckling, still there is at least one
The CFRP plates of side continue tension and are in non-relaxed state, since the tensile strength of CFRP plates is higher than compression strength, therefore can be fully sharp
Increase the section bending stiffness of the steel member ontology with not loose CFRP plates, promotes complete buckling load, and described in raising
The ductility of steel member ontology.
According to the inner equilibrium steel member that the Prestressed CFRP plate of the utility model embodiment enhances, by steel member ontology
Outer surface Prestressed CFRP plate is set, and be connected with steel member ontology by connector after making CFRP plate tensioning.It utilizes as a result,
The CFRP plates of disalignment are in the principle of tensioning state under pretension, effectively play the advantage of CFRP tensions, effectively improve
The rigidity of the steel member ontology, improve its axis pressure, bias, tension, by curved bearing capacity, it is whole also to improve its axis pressure, bias
Body stability.
In addition, also being had such as according to the inner equilibrium steel member of the Prestressed CFRP plate of the utility model above-described embodiment enhancing
Under additional technical characteristic：
Some embodiments according to the present utility model, the steel member ontology are hollow square steel pipe, and the CFRP plates are located at
In at least one set in two groups of opposite side walls of the steel member ontology.
Some embodiments according to the present utility model, the steel member ontology are I-steel, and the I-steel includes：Abdomen
Plate；First edge of a wing；Second edge of a wing, first edge of a wing and second edge of a wing be respectively provided at the both ends of the web and with it is described
Web is vertical；Wherein, the CFRP plates are located at the outer surface on first edge of a wing and second edge of a wing.
Some embodiments according to the present utility model, the connector be located at the both ends of the CFRP plates along its length with
Connect the CFRP plates and the steel member ontology.
Further, the connector is anchorage, and the anchorage includes：Connecting plate, the connecting plate are located at the CFRP
The outside of plate；Bolt is connected, the connection bolt is connected with the connecting plate, and the connection bolt is adapted to pass through the steel structure
The side wall of part ontology is integrated with steel member ontology anchoring.
Further, the rectangular plate body shape of the connecting plate, the connection bolt includes multiple.
Specifically, the connection bolt is steel bolt, and the connecting plate is steel press strip, and the connection bolt is configured to justify
Post shapes or polygonal column.
Specifically, steel member ontology region corresponding with the connecting plate carries out blasting treatment.
The additional aspect and advantage of the utility model will be set forth in part in the description, partly will be from following description
In become apparent, or recognized by the practice of the utility model.
Description of the drawings
The above-mentioned and/or additional aspect and advantage of the utility model will in the description from combination following accompanying drawings to embodiment
Become apparent and is readily appreciated that, wherein：
Fig. 1 is the solid of the inner equilibrium steel member enhanced according to the Prestressed CFRP plate of the utility model one embodiment
Figure；
Fig. 2 is the partial enlarged view that Fig. 1 centre circles show part；
Fig. 3 is the solid according to the inner equilibrium steel member of the Prestressed CFRP plate enhancing of the utility model another embodiment
Figure；
Fig. 4 is the partial enlarged view that Fig. 3 centre circles show part；
Fig. 5 is the section view of the inner equilibrium steel member enhanced according to the Prestressed CFRP plate of the utility model one embodiment
Figure；
Fig. 6 is the section view according to the inner equilibrium steel member of the Prestressed CFRP plate enhancing of the utility model another embodiment
Figure.
Reference numeral：
The inner equilibrium steel member 100 of Prestressed CFRP plate enhancing；
Steel member ontology 1, web 11, first edge of a wing 12, second edge of a wing 13,
CFRP plates 2；
Connector 3, connecting plate 31 connect bolt 32.
Specific implementation mode
The embodiments of the present invention are described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning
Same or similar element or element with the same or similar functions are indicated to same or similar label eventually.Below by ginseng
The embodiment for examining attached drawing description is exemplary, it is intended to for explaining the utility model, and should not be understood as to the utility model
Limitation.
In the description of the present invention, it should be understood that the orientation or position of the instructions such as term "upper", "lower", "outside"
It is to be based on the orientation or positional relationship shown in the drawings to set relationship, is merely for convenience of describing the present invention and simplifying the description, and
It is not that the device of instruction or hint meaning or element must have a particular orientation, with specific azimuth configuration and operation, therefore
It should not be understood as limiting the present invention.In addition, defining " first ", the feature of " second " can be expressed or impliedly
Including one or more this feature.In the description of the present invention, unless otherwise indicated, the meaning of " plurality " is two
Or it is more than two.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " is pacified
Dress ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally
Connection；It can be mechanical connection, can also be electrical connection；Can be directly connected, can also indirectly connected through an intermediary,
It can be the connection inside two elements.For the ordinary skill in the art, it can understand above-mentioned art with concrete condition
The concrete meaning of language in the present invention.
CFRP is to mix the nonmetallic materials being combined by certain processing technology with resin matrix by carbon fiber.
CFRP is the abbreviation of carbon fibre reinforced composite (Carbon Fiber Reinforced Polymer/Plastic), it has
Have that lightweight, high-strength, construction molding is convenient, the remarkable advantages such as corrosion-resistant.Last decade, application hairs of the CFRP in structural engineering field
Exhibition is rapid, has become the important supplement of the traditional structural materials such as concrete, steel, and CFRP is reasonably applied to each class formation
Have become an important directions of Structural Engineering development in object.
In recent years, it pastes the technology that CFRP is enhanced and reinforced in steel structure surface to quickly grow, becomes a kind of emerging
Steel structure reinforcing method.Its principal mode has：Beam upper and lower surface pastes CFRP sheet materials and improves anti-bending bearing capacity and bending stiffness；
Beam web pastes CFRP sheet materials and improves shear-carrying capacity；Steel structure surface pastes CFRP sheet materials and improves its remanent fatigue life；Pipe,
The component surfaces such as column, tank paste CFRP to improve its local stability or overall stability；Package or rivet at member welding joints
It nearby pastes to enhance node；Reinforcement is carried out to corrosion component and improves corrosion resistance.These reinforcement forms are at home and abroad
It is applied in some Practical Projects, plays good effect.In terms of theoretical research, the research master of CFRP reinforcing metal structures
The Buckling after CFRP- steel interface peels performance, Steel Thin-Wall component surface stickup CFRP, CFRP are concentrated on to fatigue crack
Inhibiting effect and FRP reinforce steel construction durability etc..In existing research, the not enlarged cross section substantially the case where
Under, the research for enhancing steel column overall stability using CFRP is seldom.
The inner equilibrium steel member enhanced according to the Prestressed CFRP plate of the utility model embodiment is described below in conjunction with the accompanying drawings
100.Here inner equilibrium refers to a kind of state for making steel member itself reach balance without external structure.
As shown in figs 1 to 6, the inner equilibrium steel member enhanced according to the Prestressed CFRP plate of the utility model embodiment
100, including：Steel member ontology 1, CFRP plates 2 and connector 3.
Specifically, CFRP plates 2 are arranged symmetrically in the outer surface of steel member ontology 1.That is, CFRP plates 2 are set to steel
The outer surface of member bodies 1, and CFRP plates 2 can be arranged symmetrically in the outer surface of steel member ontology 1, be conducive to put down as a result,
Weigh stress, and convenient for construction.
It is connected with steel member ontology 1 by connector 3 after 2 tensioning of CFRP plates.CFRP plates 2 may be implemented by connector 3
Being reliably connected between steel member ontology 1 ensures that the use of the inner equilibrium steel member 100 of Prestressed CFRP plate enhancing is reliable
Property.
Wherein, 2 tensioning of CFRP plates is placed on the outer surface of steel member ontology 1, and enlarged cross section is not accumulated substantially, in compression or partially
It presses under load, using the CFRP plates 2 of disalignment, in steel member 1 lateral deformation of ontology, convex surface is in the principle of tensioning state,
Ensure still has the CFRP plates 2 of at least side to continue tension during steel member 1 compressive buckling of ontology is in the shape that do not relax
State since the tensile strength of CFRP plates 2 is higher than compression strength, therefore can make full use of not loose CFRP plates 2 to increase steel member sheet
The section bending stiffness of body 1 promotes complete buckling load, and improves the ductility of steel member ontology 1.
For example, the compression strength of CFRP plates 2 can be 50% or so of tensile strength.
According to the inner equilibrium steel member 100 that the Prestressed CFRP plate of the utility model embodiment enhances, after 2 tensioning of CFRP plates
It is connected with steel member ontology 1 by connector 3.Thus, it is possible to realize being reliably connected between CFRP plates 2 and steel member ontology 1.
In addition, by the way that Prestressed CFRP plate 2 is arranged in the outer surface of steel member ontology 1, the CFRP plates 2 of disalignment are utilized
It is in the principle of tensioning state under pretension, effectively plays the advantage of CFRP tensions, effectively increases the rigidity of steel member, most
Improve eventually its axis pressure, bias, tension, by curved bearing capacity, also improve its anti-flexion capabilities.
For example, disalignment refers to that the installation position of CFRP plates 2 can deviate the center of steel member ontology 1.
In the present invention, steel member ontology 1 can be angle steel, hollow square steel pipe, channel steel, i shaped steel etc., in order to
Convenient for description, mainly illustrated so that steel member ontology 1 is hollow square steel pipe and i shaped steel as an example below, however, this is not
It can be construed as a limitation of the present invention.
Referring to Figures 1 and 2, some embodiments according to the present utility model, steel member ontology 1 can be hollow square steel pipe,
CFRP plates 2 are located in at least one set in two groups of opposite side walls of steel member ontology 1.Thus, it is possible in not enlarged cross section substantially
In the case of, the principle of tensioning state is under pretension using the CFRP plates 2 of disalignment, effectively plays CFRP tensions
Advantage effectively increases the rigidity of steel member ontology 1, improve its axis pressure, bias, tension, by curved bearing capacity, also improve its axis
Pressure, bias overall stability.
Can be in two groups of opposite side walls of hollow square steel pipe for example, in some embodiments of the utility model
The outer surface of one of which is arranged symmetrically CFRP plates 2.
Preferably, CFRP plates 2 have been arranged symmetrically in the surrounding of hollow square steel pipe.
For hollow square steel pipe, one end (for example, upper end of CFRP plates 2 shown in Fig. 1) of CFRP plates 2 is anchored in steel
On the outer surface of one end of member bodies 1, tensioning is carried out to CFRP plates 2 using jack and relevant device, after tensioning
The other end (for example, lower end of CFRP plates 2 shown in Fig. 1) of CFRP plates 2 is anchored in the appearance of the other end of steel member ontology 1
On face, monosymmetric 2 simultaneous tension of CFRP plates anchors simultaneously.
With reference to Fig. 3 and Fig. 4, some embodiments according to the present utility model, steel member ontology 1 is I-steel, I-shaped ladle
It includes：Web 11, first edge of a wing 12 and second edge of a wing 13, first edge of a wing 12 and second edge of a wing 13 are respectively provided at the both ends of web 11 simultaneously
It is vertical with web 11；Wherein, CFRP plates 2 are located at the outer surface on first edge of a wing 12 and second edge of a wing 13.That is, in first wing
The outer surface on the outer surface of edge 12 and second edge of a wing 13 is equipped with CFRP plates 2, and CFRP plates 2 are arranged symmetrically.Thus, it is possible to
Substantially not in the case of enlarged cross section, the principle of tensioning state is under pretension using the CFRP plates 2 of disalignment, effectively
Play CFRP tensions advantage, effectively increase the rigidity of steel member ontology, improve its axis pressure, bias, tension, by curved carrying
Power also improves its axis pressure, bias overall stability.
For the i shaped cross section steel member ontology 1 around strong axis instability, by one end of CFRP plates 2 (for example, CFRP in Fig. 3
The upper end of plate 2) be anchored in steel member ontology 1 one end the edge of a wing on, CFRP plates 2 are opened using jack and relevant device
It draws, the other end of the CFRP plates 2 after the tensioning lower end of CFRP plates 2 (for example, in Fig. 3) is anchored in the another of steel member ontology 1
On the edge of a wing at end, 2 simultaneous tension of CFRP plates on two side wing edges anchors simultaneously.
Some embodiments according to the present utility model, connector 3 are located at the both ends of CFRP plates 2 along its length to connect
CFRP plates 2 and steel member ontology 1.Being reliably connected between CFRP plates 2 and steel member ontology 1 may be implemented by connector 3.
Wherein, the length direction of CFRP plates 2 is referred to upper and lower directions shown in Fig. 1, the top and bottom of CFRP plates 2
It is equipped with connector 3, is convenient for the CFRP plates 2 after tensioning being connected as one with steel member ontology 1 by connector 3.
Further, with reference to Fig. 2 and Fig. 4, connector 3 is anchorage, and anchorage includes：Connecting plate 31 and connection bolt 32.
Specifically, connecting plate 31 is located at the outside of CFRP plates 2；Connection bolt 32 is connected with connecting plate 31, and connects bolt
32 be adapted to pass through steel member ontology 1 side wall and steel member ontology 1 anchoring be integrated.It may be implemented as a result, by connector 3
Being reliably connected between CFRP plates 2 and steel member ontology 1.
Wherein, the end of connection bolt 32 can be by nut check.
Optionally, connection bolt 32 is steel bolt, and connecting plate 31 is steel press strip.It can ensure the intensity of connector 3, it is ensured that
Connection reliability between CFRP plates 2 and steel member ontology 1.
Further, with reference to Fig. 2 and Fig. 4,31 rectangular plate body shape of connecting plate, connection bolt 32 includes multiple.For example, more
A connection bolt 32 can be arranged uniform intervals on connecting plate 31.So that stress is more steady.
Optionally, connection bolt 32 is configured to cylindrical shape or polygonal column.But not limited to this.
Specifically, the region corresponding with connecting plate 31 (or connector 3) of steel member ontology 1 carries out blasting treatment.In this way, having
Conducive to the connection reliability ensured between connector 3 and CFRP plates 2 and steel member ontology 1.
According to the inner equilibrium steel member 100 that the Prestressed CFRP plate of the utility model embodiment enhances, after 2 tensioning of CFRP plates
It is placed in the outer surface of steel member ontology 1, enlarged cross section is not accumulated substantially, under compression or Eccentric Load, utilizes disalignment
The convex surface in steel member 1 lateral deformation of ontology of CFRP plates 2 is in the principle of tensioning state, ensures in steel member ontology 1 by lateral deflection
In bent process, still there are the CFRP plates 2 of at least side to continue tension (not relaxing), due to 2 tensile strength of CFRP plates height (for example,
Compression strength is 50% or so of tensile strength), therefore not loose CFRP plates 2 can be made full use of to increase cutting for steel member ontology 1
Face bending stiffness promotes complete buckling load, and improves the ductility of steel member ontology 1.
With reference to Fig. 1 to Fig. 6 detailed descriptions according to flat in the enhancing of the Prestressed CFRP plate of the utility model embodiment
The course of work of weighing apparatus steel member 100.
For hollow square steel pipe, one end of CFRP plates 2 is anchored on the outer surface of one end of steel member ontology 1, is used
Jack and relevant device carry out tensioning to CFRP plates 2, and the other end of the CFRP plates 2 after tensioning is anchored in steel member ontology 1
The other end outer surface on.
For the i shaped cross section steel member around strong axis instability, one end of CFRP plates 2 is anchored in the one of steel member ontology 1
On the edge of a wing at end, tensioning is carried out to CFRP plates 2 using jack and relevant device, by the other end anchor of the CFRP plates 2 after tensioning
It is fixed on the edge of a wing of the other end of steel member ontology 1.
When anchoring, can the anchoring section at 1 both ends of steel member ontology be first subjected to blasting treatment, then pass through external reaction frame etc.
Tensioning facility, tensioning CFRP plates 2, then the end of the Prestressed CFRP plate 2 after tensioning is pasted on be reinforced component (for example,
Steel member ontology 1) tension reinforce side, and add necessary end anchorage measure (steel plate press strip etc.), finally wait for that structure glue is complete
CFRP plates 2 (put and open) are cut after all solidstate, and tensioning equipment is removed, which can be described as pre-tensioning system, to ensure symmetry, both sides
Symmetrical 2 suitable simultaneous tension of CFRP plates, anchors simultaneously.
So far the work of the inner equilibrium steel member 100 enhanced according to the Prestressed CFRP plate of the utility model embodiment is completed
Process.
According to the Prestressed CFRP plate of the utility model embodiment enhancing inner equilibrium steel member 100 other constitute and
Operation is all for those of ordinary skills known, is not detailed herein.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means particular features, structures, materials, or characteristics described in conjunction with this embodiment or example
It is contained at least one embodiment or example of the utility model.In the present specification, schematic expression of the above terms
Necessarily it is directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be
It can be combined in any suitable manner in any one or more embodiments or example.In addition, without conflicting with each other, this field
Technical staff can carry out the feature of different embodiments or examples described in this specification and different embodiments or examples
In conjunction with and combination.
Although the embodiments of the present invention have been shown and described above, it is to be understood that above-described embodiment is
Illustratively, it should not be understood as limiting the present invention, those skilled in the art are in the scope of the utility model
Inside it can make changes, modifications, alterations, and variations to the above described embodiments.
Claims (8)
1. a kind of inner equilibrium steel member of Prestressed CFRP plate enhancing, which is characterized in that including：
Steel member ontology；
CFRP plates, the CFRP plates are arranged symmetrically in the outer surface of the steel member ontology；
Connector is connected by the connector with the steel member ontology after the CFRP plates tensioning；
Wherein, the CFRP plates tensioning is placed on the outer surface of the steel member ontology, substantially not enlarged cross section accumulate, be pressurized or
Under Eccentric Load, using the CFRP plates of disalignment, in steel member ontology lateral deformation, convex surface is in the principle of tensioning state,
Ensure still has the CFRP plates of at least side to continue tension during the steel member ontology compressive buckling is in the shape that do not relax
State since the tensile strength of CFRP plates is higher than compression strength, therefore can make full use of not loose CFRP plates to increase the steel member
The section bending stiffness of ontology promotes complete buckling load, and improves the ductility of the steel member ontology.
2. the inner equilibrium steel member of Prestressed CFRP plate enhancing according to claim 1, which is characterized in that the steel member
Ontology is hollow square steel pipe, and the CFRP plates are located in at least one set in two groups of opposite side walls of the steel member ontology.
3. the inner equilibrium steel member of Prestressed CFRP plate enhancing according to claim 1, which is characterized in that the steel member
Ontology is I-steel, and the I-steel includes：
Web；
First edge of a wing；
Second edge of a wing, first edge of a wing and second edge of a wing are respectively provided at the both ends of the web and hang down with the web
Directly；
Wherein, the CFRP plates are located at the outer surface on first edge of a wing and second edge of a wing.
4. the inner equilibrium steel member of Prestressed CFRP plate enhancing according to any one of claim 1-3, which is characterized in that
The connector is located at the both ends of the CFRP plates along its length to connect the CFRP plates and the steel member ontology.
5. the inner equilibrium steel member of Prestressed CFRP plate enhancing according to claim 4, which is characterized in that the connector
For anchorage, the anchorage includes：
Connecting plate, the connecting plate are located at the outside of the CFRP plates；
Bolt is connected, the connection bolt is connected with the connecting plate, and the connection bolt is adapted to pass through the steel member sheet
The side wall of body is integrated with steel member ontology anchoring.
6. the inner equilibrium steel member of Prestressed CFRP plate enhancing according to claim 5, which is characterized in that the connecting plate
Rectangular plate body shape, the connection bolt includes multiple.
7. the inner equilibrium steel member of Prestressed CFRP plate enhancing according to claim 5, which is characterized in that the connection spiral shell
Bolt is steel bolt, and the connecting plate is steel press strip, and the connection bolt is configured to cylindrical shape or polygonal column.
8. the inner equilibrium steel member of Prestressed CFRP plate enhancing according to claim 5, which is characterized in that the steel member
Ontology region corresponding with the connecting plate carries out blasting treatment.
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| CN107882354A (en) * | 2017-12-14 | 2018-04-06 | 清华大学 | The inner equilibrium steel member of Prestressed CFRP plate enhancing |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107882354A (en) * | 2017-12-14 | 2018-04-06 | 清华大学 | The inner equilibrium steel member of Prestressed CFRP plate enhancing |
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