土木工程中文文献英文翻译Word格式文档下载.docx

1、 carbon fiber material and matching resin. Compared with the construction steel, the tensile strength of carbon fiber is ten times and elastic modulus is quite equal to it, even some of the elastic modulus of carbon fiber in it more than two times, and has a good durability and construction performa

2、nce, so carbon fiber is a very good reinforcement and repair materials. In addition, for supporting resin, including resin of the substrate, the leveling resin and bonding resin, the resin of the substrate and leveling resin have an important role on carbon fiber bonding quality, and bonding resin c

3、an make concrete and carbon fiber forming a complex whole, work together, in order to improve the bearing capacity of building structural members, to achieve the purpose of building structure member strengthening.Two, the basic characteristics of carbon fiber materials.1, carbon fiber sheet.Accordin

4、g to the mechanical properties of the material, the elastic modulus of the carbon fiber material is not the same. According to the mechanical properties of carbon fiber sheet, the main is the high modulus, high strength and medium modulus.The high modulus carbon fiber cloth is characterized by its l

5、ow elongation at break but high elastic modulus. The unit weight of carbon fiber cloth is not comparable with that of steel, Carbon fiber sheet is very thin, but because of the chemical structure of carbon fiber, the fiber can be used for any acid salt and all kinds of chemical medium environment, d

6、o not be afraid of corrosion and can resist the low temperature or high temperature thermal expansion and contraction.2, supporting resin bonded materials.In the construction project, the main material used in the reinforced concrete structure repair technology is bottom coating,putty,bonding resin

7、or impregnated resin, and its functions are different.First of all, for the bottom coating, the concrete surface is more applicable, can speed up the bond, in order to ensure the stability of the interface. Secondly, for the putty, mainly on various parts of the surface are filled, fill up the gap o

8、f the entire surface, so that the function of carbon fiber sheet can be fully played. Then, the bonding resin has the function of sticking to the carbon fiber board, and the impregnated resin has the function of sticking to the carbon fiber cloth. The bonding resin and the impregnated resin are used

9、 mainly to bond the carbon fiber sheet to each part of the concrete component, which can make the scattered parts form a whole, and the two work together. In addition, the epoxy resin is mainly applied to the highway concrete bridge, the use of carbon fiber sheet reinforcement technology is also mor

10、e appropriate, when present in a variety of circumstances, with the change of temperature, it has some influence on its curing properties, therefore, to a large extent, the quality of paste is good or bad, which has an important impact on the number of regular traffic disruption time.Three, strength

11、ening construction technology of carbon fiber reinforced materials.Strengthening construction technology of carbon fiber reinforced materials:unloading-basal treatment-base rubber-leveling-paste-protection.1, unloading.For unloading, it is to remove the non tube components, so that it can make the i

12、mpact on other components reduce effectively.2, basal treatment.（1）If the concrete surface produces the phenomenons of corrosion, hollowing, honeycomb and spalling, you need to cut out of these parts. For a larger area of poor quality, after the cutting operation, the epoxy mortar should be used to

13、repair the work.（2）For the part that produces the crack, it should be treated in a fully closed manner.（3）For the float, oil and other impurities on the concrete surface, we should use concrete grinder, sandpaper to remove. In addition, to ensure the surface of the component is smooth, polish the ra

14、ised part of the surface, the corner should make Chamfering processing, and be polished into a circular arc.（4）Before the base operation, must keep the concrete surface dry clean, if not in line with the requirements of the construction, we should use the hair dryer to blow it.3, base rubber.（1）The

15、main agent and curing agent should be placed in the container, the proportion of the main agent and the curing agent must be measured accurately according to the standard of construction, then the electric mixer is used to mix it evenly, determine the amount of the dosage according to the actual tem

16、perature of the construction site, and control the use of time strictly , usually run out within an hour.（2）Through the use of roller brush brushing the bottom evenly in the concrete surface, and the next process can be carried out only when the glue is solidified. 4, leveling.（1）For leveling operat

17、ion in Construction Engineering, it can make the difference in height has been further reduced, we can use FE glue level the part of the surface of the concrete which is sunken, template joints and other parts.（2）We can also use FE glue to mend the corner to a smooth arc.5, paste.（1）The size and num

18、ber of layers of carbon fiber cloth shall be determined according to the actual requirements of the construction.（2）To carry out the deployment and mix of FR glue, and apply it evenly to the position where it needs to be pasted.（3）When the carbon fiber cloth is pasted, no bubbles can be created, if

19、there are bubbles, we can use the special roller along the direction of the fiber to carry out repeated rolling, and make the FR glue fully soaked carbon fiber cloth. Only when the carbon fiber cloth surface dry , you can carry on the next layer of paste.（4）Apply FR glue evenly on the surface of the

20、 last layer of carbon fiber cloth.6, protection.Plastering and fireproof coating should be adopted to Protect the surface of the reinforced carbon fiber cloth.Four, the application of carbon fiber materials in building structure reinforcement.1, the scope of application of carbon fiber reinforced ma

21、terials.Applicable to various shapes, any part of the structure, brick masonry reinforcement repair.2, Specification for reinforced concrete structures strengthened with carbon fiber sheets.When the concrete is strengthened by carbon fiber sheet, the component and carbon fiber sheet are bonded toget

22、her seamlessly, at this time, the carbon fiber sheet and concrete integrate into a whole, together to withstand the stress.3, Carbon fiber sheet can be used in the following ways to strengthen the concrete structural member.When the carbon fiber sheet is used for bending and strengthening of the bea

23、m and plate member in the tension zone, the direction of the fiber should be consistent with the direction of the reinforcement;When the beams and columns are subjected to shear and reinforcement, it can be closed U paste or side paste, at this time, fiber direction should be perpendicular to the ax

24、ial direction of the component;The anti seismic reinforcement of buildings can be pasted fully enclosed, at this time, the fiber direction should be perpendicular to the column axial direction;When there is sufficient evidence, the carbon fiber sheet can also be reinforced according to the stress st

25、ate of the concrete structure;When the carbon fiber sheet is bonded to the concrete structure, we can according to the national standard, use limit state design method based on probability theory, the ultimate bearing capacity and normal carrying capacity of concrete structures are calculated respec

26、tively.Meanwhile, on the one hand, reinforced concrete structure should be based on the national standard, determine the corresponding material design index, and then through the detection to sure its actual strength whether can achieve the relevant requirements; On the other hand, the carbon fiber

27、sheet should be based on the elastic stress-strain curve when the component reaches the limit state to determine the corresponding stress; In general, the ultimate tensile strength of carbon fiber sheet should not be less than 95% of the guaranteed rate of the manufacturer as a marker of the tensile

28、 strength.When the member is strengthened with carbon fiber sheet, consideration should be given to the effects of strengthening materials on the components and their properties; As before the use of carbon fiber reinforcement, we should try to remove the live load, in order to reduce the impact on other components. The stress of l