CN106088654B - FRP ruggedized construction ductility Enhancement Methods based on preload - Google Patents
FRP ruggedized construction ductility Enhancement Methods based on preload Download PDFInfo
- Publication number
- CN106088654B CN106088654B CN201610615547.1A CN201610615547A CN106088654B CN 106088654 B CN106088654 B CN 106088654B CN 201610615547 A CN201610615547 A CN 201610615547A CN 106088654 B CN106088654 B CN 106088654B
- Authority
- CN
- China
- Prior art keywords
- frp
- ruggedized construction
- items
- preload
- arcuation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- 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
- 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
- E04G2023/0251—Increasing or restoring the load-bearing capacity of building construction elements by using fiber reinforced plastic elements
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Working Measures On Existing Buildindgs (AREA)
Abstract
The FRP ruggedized construction ductility Enhancement Methods based on preload that the invention discloses a kind of make to wait for that ruggedized construction is waiting for reinforcing area generation prestretching stress it is characterized in that applying external loads on waiting for ruggedized construction；The external loads waited in ruggedized construction are remained applied to, FRP items are waited for into the surface of ruggedized construction waiting for that reinforcing area is transversely pasted onto using alite paste, the longitudinally spaced at least twice that are formed with are in lateral arcuation release band in FRP items and between waiting for ruggedized construction；When alite paste is completed to consolidate, external loads are shed, realize the enhancing of FRP ruggedized construction ductility.The present invention can effectively be such that the ductility of FRP ruggedized constructions enhances, and the collaborative work at simulation arcuation stripping area and ruggedized construction object interface has given full play to the performance of FRP, the larger ductility for enhancing FRP ruggedized constructions.
Description
Technical field
The present invention relates to a kind of FRP ruggedized construction ductility enhancing sides based on preload applied in engineering in practice
Method.
Background technology
With the increase of service life, concrete structure will appear the sign or entered function catagen of failure, for
The concrete structure for this case occur must be safeguarded and be reinforced.Conventional method about concrete structure reinforcement has：It sets
Change concrete strengthening method, additional prestressing, adhesivebonded bar method for strengthening, increasing section method for strengthening, affixing steel plate reinforcement method,
Setting support method for strengthening etc., but there is work progress complexity, construction sites to be limited to some extent, increases for these traditional methods
Add dead load, influence building use space and influences the drawbacks such as building shape.
Fibre reinforced composites FRP is mixed according to a certain percentage with basis material by fibrous material, is squeezed by mold
Pressure, drawing and the high-performance proximate matter material formed have glass fibre reinforced composion GFRP, fibre reinforced composites
CFRP, aramid fiber enhance composite A FRP and basalt fibre reinforcing material BFRP etc..FRP high-strength lights, corrosion resistant candle property
Energy is good, anti-fatigue performance is excellent, solenoid isolation is good, is easy to construction, hardly increases dead load, do not influence making for building
With space, designability is strong, can adapt to the variation of planform.Based on these advantages, in engineering, there are many answer FRP in practice
With, such as：FRP tendons are used as the drag-line of cable-stayed bridge, are used as concrete-bridge crossbeam and the arrangement of reinforcement in plate and externally reinforced muscle
The transmission rod of cement pavement.FRP be used to repair German Ka Tebuxi bridges, and Switzerland is used for Eibar He Qiao's using CFRP plates are pasted
It reinforces, America and Japan's cooperation has built up U.S.'s First and used CFRP tendons bridge-cloth Ritchie Jie Qiao；Application in China has：Yunnan Hai Meng
Highway Wei Shanheqiao, Shanghai Baoshan scud bridge and Nanjing Yangtze River Bridge access bridge etc..
But there are the defects that brittleness is strong and ductility is low for FRP ruggedized constructions.FRP- concrete interfaces are more in practice for engineering
It is it occur frequently that stripping damage.For example, using paste outside FRP technologies (EB-FRP) come when reinforcing reinforced concrete structure, it will usually occur
The interfacial failure of two class FRP and concrete：The first kind is influenced by middle bent or bending and shear cracks, in crack location
Larger tensile stress is generated in FRP sheet materials, this tensile stress is transmitted by interface into concrete.It cuts at interface near crack
When stress reaches critical value, there is horizontal fracture in the concrete at the neighbouring interfaces concrete FRP, and to FRP end extendeds, most
FRP is completely exfoliated afterwards.This type is the interface peel that middle part crack is caused.Second class begins at the stripping of the ends FRP
It destroys, this is because caused by the high-stress state of the ends FRP caused by FRP is blocked.FRP strippings reduce the anti-of FRP material
Tensile strength utilization rate, while making structure that brittle break occur.
Invention content
The present invention is to provide one kind of low cost, easy construction, use to avoid above-mentioned deficiency of the prior art
The high FRP ruggedized construction ductility Enhancement Methods based on preload of long lifespan, reliability.
The present invention is to solve technical problem to adopt the following technical scheme that：
The present invention is based on the FRP ruggedized construction ductility Enhancement Methods of preload, it is characterized in that：It is applied on waiting for ruggedized construction
Add external loads, makes described to wait for that ruggedized construction is waiting for that reinforcing area generates prestretching stress；It remains applied to and waits in ruggedized construction
External loads, FRP items are waited for into the surface of ruggedized construction waiting for that reinforcing area is transversely pasted onto using alite paste, described
FRP items and wait for that the longitudinally spaced at least twice that are formed with are in lateral arcuation release band, the arcuation stripping between ruggedized construction
Band refers to that FRP items form stripping in belt-like zone transversely with ruggedized construction is waited for, and are swelled in arcuation；It is complete in alite paste
When at consolidation, external loads are shed, realize the enhancing of FRP ruggedized construction ductility.
The present invention is based on the FRP ruggedized construction ductility Enhancement Methods of preload, it is characterized in that：The arcuation release band
Generation type is：FRP items are transversely being pasted onto when the surface of ruggedized construction, where arcuation release band using alite paste
At position, one section of bar of merging is in FRP items and waits between ruggedized construction；Make FRP items be formed to swell in arcuation, in the alite paste
In half-dried and when losing flowability, the bar is taken out；The FRP items keep grand in arcuation in arcuation release band position
It rises.
The present invention is based on the FRP ruggedized construction ductility Enhancement Methods of preload, it is characterized in that：The external lotus of the application
The upper limit of load is that ruggedized construction is made absolutely to surrender.
The present invention is based on the FRP ruggedized construction ductility Enhancement Methods of preload, it is characterized in that：The alite paste is epoxy
Resin.
The present invention is based on the FRP ruggedized construction ductility Enhancement Methods of preload, it is characterized in that：Apply external loads it
Before, wait for that ruggedized construction pre-processes on the surface for waiting for reinforcing area for described, it is described to enhance sticking strength and durability
Pretreatment includes removal surface iron rust or other impurity, carries out the stickup of FRP items after the completion of pretreatment in 12 hours.
The present invention is based on the FRP ruggedized construction ductility Enhancement Methods of preload, it is characterized in that：The FRP items are tool
The FRP items of effective tensile strength are by choosing any one kind of them in carbon fiber, glass fibre and aramid fiber and other fibrous materials
Or it is a variety of it is woven made of unidirectional, two-way or with multi-angle direction FRP items.
The present invention is based on the FRP ruggedized construction ductility Enhancement Methods of preload, it is characterized in that：It is described to wait for that ruggedized construction is
Elasticity, plasticity, elastoplasticity component with reliable tensile strength and deformability.
The present invention is based on the FRP ruggedized construction ductility Enhancement Methods of preload, it is characterized in that：It is described to wait for that ruggedized construction is
Steel construction, reinforced concrete structure or alloy material structure.
The present invention in the FRP ruggedized construction ductility Enhancement Methods of preload, it is characterized in that：The bar be sticking plaster or
Wooden stick.
Compared with prior art, the present invention has the beneficial effect that：
1, the present invention is to ruggedized construction by pasting FRP items in the case where applying external loads, the need when structure stress
Tensile stress opposite on FRP items is first balanced, FRP items just function to later, to improve the ductility of FRP items.
2, the collaborative work of the present invention simulation arcuation stripping area and ruggedized construction object interface, after arcuation glass tape stretches
FRP items at this continue stress, significant effect, have given full play to the performance of FRP items, the larger FRP ruggedized constructions that enhance
Ductility.
3, easy construction of the present invention, reliability are high.
Description of the drawings：
Fig. 1 is the steel test specimen for not carrying out FRP reinforcings；
Fig. 2 is to reinforce steel test specimen without carrying out the FRP of preload；
Fig. 3 is the FRP reinforcing steel test specimens that preload acts on lower band arcuation release band；
Fig. 4 is experiment gained strain-time plot；
Figure label：1 steel test specimen, 2 foil gauges, 3 be FRP items, 4 bars.
Specific implementation mode
The FRP ruggedized construction ductility Enhancement Methods based on preload are in the present embodiment：Apply on waiting for ruggedized construction
External loads make described to wait for that ruggedized construction is waiting for that reinforcing area generates prestretching stress；It remains applied to and waits in ruggedized construction
FRP items are waited for the surface of ruggedized construction waiting for that reinforcing area is transversely pasted onto by external loads using alite paste, based on waiting reinforcing
The difference of structure, FRP items, which are pasted onto, waits for ruggedized construction single side or tow sides, for example, waiting for that ruggedized construction is steel construction piece or conjunction
Golden component, FRP items are pasted onto the tow sides for waiting for ruggedized construction, if waiting for, ruggedized construction is reinforced concrete structure, FRP items
Paste its tension face；In FRP items and between waiting for ruggedized construction, the longitudinally spaced at least twice that are formed with are removed in lateral arcuation
Band, the arcuation release band refer to FRP items in belt-like zone transversely and wait for that ruggedized construction forms stripping, and be in arcuation
Protuberance；When alite paste is completed to consolidate, external loads are shed, realize the enhancing of FRP ruggedized construction ductility.
In specific implementation, the generation type of arcuation release band is：It is to be added being transversely pasted onto FRP items using alite paste
When the surface of fixing structure, in arcuation release band position, one section of bar 4 of merging is in FRP items 3 and waits between ruggedized construction；
Make FRP items be formed to swell in arcuation, in the alite paste in half-dried and when losing flowability, takes out the bar；The FRP items
It keeps swelling in arcuation in arcuation release band position.
The upper limit of the external loads applied in the present embodiment is that ruggedized construction is made absolutely to surrender；Alite paste is asphalt mixtures modified by epoxy resin
Fat；Before applying external loads, wait for that ruggedized construction pre-processes on the surface for waiting for reinforcing area for described, it is viscous to enhance
Intensity and durability are pasted, the pretreatment includes removal surface iron rust or other impurity, is carried out in 12 hours after the completion of pretreatment
The stickup of FRP items；FRP items are the FRP items with effective tensile strength, be by carbon fiber, glass fibre and aramid fiber and
Choose any one kind of them in other fibrous materials or it is a variety of it is woven made of unidirectional, two-way or with multi-angle direction FRP items；It waits for
Ruggedized construction is the elasticity with reliable tensile strength and deformability, plasticity, elastoplasticity component；Wait for that ruggedized construction is steel knot
Structure, reinforced concrete structure or alloy material structure；Bar is sticking plaster or wooden stick.
The mechanism of action：
It waits for that ruggedized construction is waiting for reinforcing area generation prestretching stress under the effect of pre-add external loads, then FRP items is glued
It is attached to and waits for ruggedized construction surface, after finally shedding external loads, wait for ruggedized construction deformation retraction, acted in bearing load again
When, the pre-add external loads when the load born, which is less than or equal to, to be reinforced, FRP items will be not subject to tensile stress；Until bear
After load is more than pre-add external loads when reinforcing, FRP items just function to；And the load born when FRP ruggedized constructions by
When cumulative big, the gradual stress of arcuation release band is slowly stretched, until the FRP items at this continue to bear tensile stress.During this,
Pass through the design of preload and arcuation release band so that FRP items gradually play a role under different load ranks, to increase
The ductility of strong FRP ruggedized constructions.
Experimental verification：
This experiment uses steel test specimen 1, steel test specimen 1 to grow 18 inches, 2 inches wide, 0.0598 inch of thickness；It is destroyed to control
The position of point cuts out a diameter of 1 inch centered on the sub-assembly of steel test specimen 1 and FRP items by the vertical central axes of FRP items
Symmetrical two semi arches.
Foil gauge 2 is pasted respectively in the tow sides of steel test specimen 1, is specifically included as shown in Figure 1 in steel test specimen side
Center position pastes a foil gauge 2, and as shown in Figures 2 and 3 symmetrically pastes two centered on the other side is by central axes
Foil gauge 2, between symmetrical two foil gauges between be divided into 1 inch.
Four groups of steel test specimens are prepared by following form：
First group of steel test specimen does not paste FRP items in its both sides, as shown in Figure 1, being used as blank control group；
Second group of steel test specimen pastes a FRP respectively in the case where not applying preload effect in its tow sides
Item, as shown in Fig. 2, and ensureing that FRP items are fully consolidated with steel test specimen.
Third group steel test specimen, it is positive and negative at its by the method for the present invention by the 30% of steel test specimen preload to its yield strength
A FRP item is pasted on two sides respectively, and ensures that FRP items are fully consolidated with steel test specimen, and centered on central axes, is symmetrically formed two
The spacing of road arcuation release band, twice arcuation release band is 4 inches；
4th group of steel test specimen, it is positive and negative at its by the method for the present invention by the 60% of steel test specimen preload to its yield strength
A FRP item is pasted on two sides respectively, and ensures that FRP items are fully consolidated with steel test specimen, and centered on central axes, is symmetrically formed two
The spacing of road arcuation release band, twice arcuation release band is 4 inches.
Four groups of steel test specimens are stepped up class of loading in loading apparatus until failure, records corresponding strain and time
Numerical value, and observe respective sets component deformation failure situation.After analyzing data, the test specimen that must tap is in different preload grades
Under, it pastes as shown in Figure 4 to improving the effect of FRP ductility under the synergistic effect of FRP items and arcuation release band.
In Fig. 4, curve a be load action in no patch FRP items, also not the strain on the steel test specimen of preload and when
Between change curve；Curve b is that load action is pasting FRP items, but the not strain on the steel test specimen of preload and time
Change curve；Curve c is that load action is pasting FRP items, and preload reaches the 30% steel examination of steel test specimen yield strength
Strain on part and time changing curve；Curve d is that load action is pasting FRP items, and it is strong that preload reaches the surrender of steel test specimen
The change curve of strain and time on 60% steel test specimen of degree.
As shown in figure 4, curve b, compared with curve a, the time that steel test specimen is loaded onto destruction is elongated, when steel test specimen is surrendered
Strain, which has, slightly to improve, this illustrates stickup FRP items, and to reinforcing steel test specimen, its ductility increases；Curve c compared with curve b,
Strain facies when steel test specimen is surrendered should improve 23%；Compared with curve b, strain facies when steel test specimen is surrendered should improve curve d
35%；By the comparison of curve c and curve d and curve b, illustrate bright according to the method for the present invention reinforcing steel test specimen its ductility enhancing
It is aobvious.By analyzing above, the method for the present invention can effectively improve the ductility of FRP ruggedized constructions.
Protection scope of the present invention is not limited merely to above-described embodiment, and all technical solutions belonged under thinking of the present invention are equal
It belongs to the scope of protection of the present invention.It should be pointed out that for those skilled in the art, not departing from the present invention
Several improvements and modifications under the premise of principle, should be regarded as protection scope of the present invention.
Claims (9)
1. a kind of FRP ruggedized construction ductility Enhancement Methods based on preload, it is characterized in that：Apply on waiting for ruggedized construction outer
Portion's load makes described to wait for that ruggedized construction is waiting for that reinforcing area generates prestretching stress；Remain applied to wait for it is outer in ruggedized construction
FRP items are waited for the surface of ruggedized construction waiting for that reinforcing area is transversely pasted onto, in the FRP items by portion's load using alite paste
With wait for that the longitudinally spaced at least twice that are formed with refer in lateral arcuation release band, the arcuation release band between ruggedized construction
FRP items form stripping in belt-like zone transversely with ruggedized construction is waited for, and are swelled in arcuation；It completes to consolidate in alite paste
When, external loads are shed, realize the enhancing of FRP ruggedized construction ductility.
2. the FRP ruggedized construction ductility Enhancement Methods according to claim 1 based on preload, it is characterized in that：It is described
The generation type of arcuation release band is：FRP items are transversely being pasted onto when the surface of ruggedized construction using alite paste, are being encircleed
Shape release band position, one section of bar of merging is in FRP items and waits between ruggedized construction；Make FRP items be formed to swell in arcuation,
In the alite paste in half-dried and when losing flowability, the bar is taken out；The FRP items are in arcuation release band position
It keeps swelling in arcuation.
3. the FRP ruggedized construction ductility Enhancement Methods according to claim 1 based on preload, it is characterized in that：It is described
The upper limit of the external loads of application is that ruggedized construction is made absolutely to surrender.
4. the FRP ruggedized construction ductility Enhancement Methods according to claim 1 based on preload, it is characterized in that：It is described
Alite paste is epoxy resin.
5. the FRP ruggedized construction ductility Enhancement Methods according to claim 1 based on preload, it is characterized in that：It is applying
Before adding external loads, wait for that ruggedized construction pre-processes on the surface for waiting for reinforcing area for described, to enhance sticking strength
And durability, the pretreatment includes removal surface iron rust or other impurity, carries out FRP items after the completion of pretreatment in 12 hours
It pastes.
6. the FRP ruggedized construction ductility Enhancement Methods according to claim 1 based on preload, it is characterized in that：It is described
FRP items be the FRP items with effective tensile strength, be by carbon fiber, glass fibre and aramid fiber and other undulation degrees
Choose any one kind of them in material or it is a variety of it is woven made of unidirectional, two-way or with multi-angle direction FRP items.
7. the FRP ruggedized construction ductility Enhancement Methods according to claim 1 based on preload, it is characterized in that：It is described
Wait for ruggedized construction for the elasticity with reliable tensile strength and deformability, plasticity, elastoplasticity component.
8. the FRP ruggedized construction ductility Enhancement Methods according to claim 1 based on preload, it is characterized in that：It is described
Wait for that ruggedized construction is steel construction, reinforced concrete structure or alloy material structure.
9. the FRP ruggedized construction ductility Enhancement Methods according to claim 2 based on preload, it is characterized in that：It is described
Bar is sticking plaster or wooden stick.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610615547.1A CN106088654B (en) | 2016-07-29 | 2016-07-29 | FRP ruggedized construction ductility Enhancement Methods based on preload |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610615547.1A CN106088654B (en) | 2016-07-29 | 2016-07-29 | FRP ruggedized construction ductility Enhancement Methods based on preload |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106088654A CN106088654A (en) | 2016-11-09 |
| CN106088654B true CN106088654B (en) | 2018-11-06 |
Family
ID=57479646
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610615547.1A Active CN106088654B (en) | 2016-07-29 | 2016-07-29 | FRP ruggedized construction ductility Enhancement Methods based on preload |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106088654B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105839937A (en) * | 2016-03-31 | 2016-08-10 | 大连理工大学 | Replaceable reinforcing method for girder structure |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE202004009680U1 (en) * | 2004-06-18 | 2004-09-16 | Schulze, Karl-Heinz | Structural component, especially ceiling or flexing beam in building, has for underside adhesive reinforcement a fireproof lining including at least 10mm thick insulating wool with melting point above 1,000 deg C |
| CN102912740A (en) * | 2012-11-06 | 2013-02-06 | 河北工业大学 | Reinforcing method for road simply-supported girder bridge |
| CN103321430A (en) * | 2013-06-07 | 2013-09-25 | 华北水利水电大学 | Construction method of reinforcing large-span concrete structure with prestressed carbon fiber sheet |
| CN105525767A (en) * | 2016-02-17 | 2016-04-27 | 深圳大学 | Method and device for improving ductility of FRP (fiber reinforced plastic) strengthened structure and increasing FRP utilization rate |
| US9663879B2 (en) * | 2012-11-28 | 2017-05-30 | Milliken & Company | Method of strengthening existing structures using strengthening fabric having slitting zones |
-
2016
- 2016-07-29 CN CN201610615547.1A patent/CN106088654B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE202004009680U1 (en) * | 2004-06-18 | 2004-09-16 | Schulze, Karl-Heinz | Structural component, especially ceiling or flexing beam in building, has for underside adhesive reinforcement a fireproof lining including at least 10mm thick insulating wool with melting point above 1,000 deg C |
| CN102912740A (en) * | 2012-11-06 | 2013-02-06 | 河北工业大学 | Reinforcing method for road simply-supported girder bridge |
| US9663879B2 (en) * | 2012-11-28 | 2017-05-30 | Milliken & Company | Method of strengthening existing structures using strengthening fabric having slitting zones |
| CN103321430A (en) * | 2013-06-07 | 2013-09-25 | 华北水利水电大学 | Construction method of reinforcing large-span concrete structure with prestressed carbon fiber sheet |
| CN105525767A (en) * | 2016-02-17 | 2016-04-27 | 深圳大学 | Method and device for improving ductility of FRP (fiber reinforced plastic) strengthened structure and increasing FRP utilization rate |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106088654A (en) | 2016-11-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Ma et al. | Testing and analysis of basalt FRP-confined damaged concrete cylinders under axial compression loading | |
| CN107217788A (en) | Full FRP muscle enhancing ECC Combined concrete beams and preparation method thereof | |
| CN201962964U (en) | Prestressed fiber resin compound rib-embedded and adhered reinforced concrete structure | |
| Kalayci et al. | Construction tolerances and design parameters for NSM FRP reinforcement in concrete beams | |
| CN102729544A (en) | FRP (Fiber Reinforced Polymer)-steel advanced composite material for structure reinforcement and preparation method thereof | |
| CN205591398U (en) | FRP mesh grid - ECC strip reinforcing reinforced concrete shear wall | |
| CN108316555A (en) | A kind of FRP tendons-reinforcing bar composite strengthening ECC- Combined concrete T-type beams | |
| Alam et al. | Flexural strengthening of reinforced concrete beam using jute rope composite plate | |
| Zhang et al. | Influence factors analysis of the interfacial bond behavior between GFRP plates, concrete | |
| Li et al. | Effect of moisture-heat coupling on mechanical behavior of nano-SiO2 adhesives and CFRP-steel lap joints | |
| CN106088654B (en) | FRP ruggedized construction ductility Enhancement Methods based on preload | |
| Yang et al. | Experimental studies on behavior of failed CRB750 steel bars reinforced concrete beams retrofitted with steel plate | |
| Valcuende et al. | Ductility of reinforced concrete beams strengthened with CFRP strips and fabric | |
| CN106320731A (en) | Crack strengthening method for steel I-beam flange zone | |
| Fernandes et al. | Flexural response of HSC girders strengthened with non-and prestressed CFRP laminates | |
| CN104746416B (en) | A kind of RPC(Reactive Powder Concrete)-normal concrete compound cross-section structure | |
| Puluhulawa | Behavior of shear connector variations on strengthened reinforced concrete slabs using cold formed steel | |
| Zhao et al. | Ductility research of reinforced concrete beams strengthened with CFRP | |
| Abdulhameed et al. | Evaluation of Wedge-Block Concrete Beams Reinforced with EBR-CFRP Laminates by Modified ACI 440.2 R-2017 Guide | |
| Salleh et al. | Flexural behavior of GFRP RC beam strengthened with carbon fiber reinforced polymer (CFRP) plate: Cracking behavior | |
| CN218937974U (en) | Be suitable for muscle material and eccentric drawing test device of concrete | |
| CN219315528U (en) | Bridge reinforced structure | |
| Yang et al. | Experimental study on the fatigue properties of RC beam strengthened by prestressed CFL | |
| Mo et al. | Theoretical Calculation of Flexural Load Capacity of RC Beams Reinforced with Aluminum Alloy-ECC Composites | |
| Yuan et al. | Experimental research on flexural performance of concrete beams strengthened by hybrid fiber CGFRP sheet |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |