Design method of carbon fiber sheet added beam plate structure and beam plate

Abstract

The invention provides a design method for a carbon fiber sheet-added beam plate structure. The method comprises the following steps: firstly, determining beam plate parameters, concrete parameters, carbon fiber sheet parameters and / or steel bar parameters; and then, determining a steel bar area and / or a carbon fiber cloth area required in the beam-slab structure according to the beam-slab parameters, the concrete parameters, the carbon fiber cloth parameters and / or the steel bar parameters. Beam and slab parameters, concrete parameters, carbon fiber cloth parameters and / or steel bar parameters comprehensively influence the stability of the beam and slab structure, and according to the design method, the steel bar area and / or the carbon fiber cloth area needed in the beam and slab structure are / is determined through the beam and slab parameters, the concrete parameters, the carbon fiber cloth parameters and / or the steel bar parameters. And the reliability of beam plate structure design can be ensured.

Description

Technical Field

[0001] The present application belongs to the technical field of beam-slab structures, and in particular relates to a design method for a beam-slab structure with carbon fiber cloth and a beam-slab. Background Art

[0002] Beams and slabs are the main components of buildings that bear bending moments and shear forces. Steel bars are the main load-bearing materials in beams and slabs, bearing the tension and pressure of the beam and slab structure. In complex beam and slab structures, in order to enhance the structural safety and stability of the beam and slab, multiple layers of steel bars need to be set, that is, the steel bars need to be crossed and overlapped. However, the crossing and overlapping of steel bars will increase the difficulty of construction and affect the construction efficiency. In the related art, carbon fiber cloth is used to replace part or all of the steel bars to bear the force, thereby solving the construction problems caused by the dense binding and overlapping of steel bars. However, in the related art, when steel bars and carbon fiber cloth are used in the beam and slab structure at the same time, the required steel bar area and carbon fiber cloth area in the beam and slab structure are the key factors affecting the structural stability of the beam and slab. At present, there is still no reliable beam and slab structure design method to determine the required steel bar area and carbon fiber cloth area in the beam and slab structure. Summary of the invention

[0003] The technical problem to be solved by the present application is to provide a design method for a beam-slab structure with carbon fiber cloth, aiming to provide a reliable design method to determine the required steel bar area and carbon fiber cloth area in the beam-slab structure.

[0004] In order to solve the above technical problems, in a first aspect, the present application provides a method for designing a beam-slab structure with carbon fiber cloth, wherein the beam-slab design method is applied to a beam-slab, wherein the cross-section of the beam-slab is rectangular, wherein the beam-slab comprises concrete, steel bars, and carbon fiber cloth, or wherein the beam-slab comprises concrete and carbon fiber cloth, wherein the steel bars and / or the carbon fiber cloth are arranged below the beam-slab, and wherein the beam-slab design method comprises:

[0005] Determine beam and slab parameters, concrete parameters, carbon fiber cloth parameters and / or steel bar parameters;

[0006] Determine the required steel bar area A in the beam-slab structure according to the beam-slab parameters, the concrete parameters, the carbon fiber cloth parameters and / or the steel bar parameters s and / or the carbon fiber cloth area A cf ;

[0007] The beam-slab parameters include the beam section width b; the concrete parameters include the concrete compressive strength value f c and the height x of the concrete compression zone; the carbon fiber cloth parameters include the tensile strength f of the carbon fiber cloth cf and the elastic modulus E of carbon fiber cloth cf The steel bar parameters include the tensile strength of the steel bar f yand the elastic modulus E of the steel bar s .

[0008] Furthermore, the steel bar area and / or the carbon fiber cloth area A required in the beam-slab structure is determined according to the beam-slab parameters, the concrete parameters, the carbon fiber cloth parameters and / or the steel bar parameters. cf ,include:

[0009] Determine the resultant pressure C of the concrete compression zone and the tensile force T borne by the carbon fiber cloth cf And the tensile force T borne by the steel bar s , where the resultant pressure force C in the concrete compression zone is the concrete compressive strength value f c , the product of the beam section width b and the height x of the concrete compression zone; the tensile force T borne by the carbon fiber cloth cf is the tensile strength f of the carbon fiber cloth cf and the carbon fiber cloth area A cf The product of the tensile force T borne by the steel bar s is the tensile strength of the steel bar f y and the steel bar area A s The product of

[0010] According to the principle of force balance, the resultant pressure C in the compression zone of the concrete is equal to the tensile force T borne by the carbon fiber cloth. cf , or the tensile force T borne by the steel bar s , or the tensile force T borne by the carbon fiber cloth cf And the tensile force T borne by the steel bar s of and;

[0011] The first relational expression for the height x of the concrete compression zone is derived from the deformation coordination equation;

[0012] According to the first relationship, the pressure force C in the concrete compression zone and the tensile force T borne by the carbon fiber cloth cf And the tensile force T borne by the steel bar s , determine the required steel bar area A in the beam-slab structure s and / or the carbon fiber cloth area A cf .

[0013] Furthermore, the first relational expression for deriving the height x of the concrete compression zone according to the deformation coordination equation includes:

[0014] Assume that the edge strain ε of the concrete compression zone is c , the strain of carbon fiber cloth ε cf , the strain of the steel bar ε s Wherein, the carbon fiber cloth and the steel bar are approximately at the same height position of the beam plate, and the strain ε of the carbon fiber cloth c f and the strain ε of the reinforcements same;

[0015] According to the deformation coordination equation as well as and The first relationship is derived as h is the height position of the carbon fiber cloth or the steel bar, and h0 is the effective height of the cross section of the beam and slab.

[0016] Furthermore, according to the first relationship, the resultant pressure force C of the concrete compression zone and the tensile force T borne by the carbon fiber cloth cf And the tensile force T borne by the steel bar s , determine the required steel bar area A in the beam-slab structure s and / or the carbon fiber cloth area A cf ,include:

[0017] According to the pressure resultant force C of the concrete compression zone and the tensile force T borne by the carbon fiber cloth cf And the tensile force T borne by the steel bar s Determine the second relationship C = T cf +T s ;

[0018] According to the second relation C = T cf +T s , determine the third relationship α1f c bx=f cf A cf +f y A s (α1 is a coefficient, and α1 value is 1);

[0019] According to the first relation And the third relation α1f c bx=f cf A cf +f y A s , derive the required steel bar area A in the beam-slab structure s and / or the carbon fiber cloth area A cf .

[0020] Further, according to the first relational expression And the third relation α1f c bx=f cf A cf +f y A s , derive the required steel bar area A in the beam-slab structure s and / or the carbon fiber cloth area A cf ,include:

[0021] According to the first relational expression and the third relational expression, the carbon fiber cloth area can be derived as The steel bar area

[0022] Furthermore, the beam-slab design method comprises:

[0023] Determine the required steel bar area A in the beam-slab structure s After that, according to the carbon fiber cloth area Calculate the carbon fiber cloth area A required in the beam-slab structure cf ;or

[0024] Determine the carbon fiber cloth area A required in the beam-slab structure cf After that, according to the steel bar area Calculate the required steel bar area A in the beam-slab structure s .

[0025] Furthermore, the beam and slab of the beam and slab structure include the concrete, the carbon fiber cloth, and the steel bars, and the carbon fiber cloth and the steel bars in the beam and slab structure are replaceable with equal strength.

[0026] Furthermore, the beam-slab structure comprises the concrete and the carbon fiber cloth, and the steel bar area A in the beam-slab structure s is zero.

[0027] In a second aspect, the present application provides a beam-slab, wherein the cross-section of the beam-slab is rectangular, the beam-slab comprises concrete, steel bars, and carbon fiber cloth, or the beam-slab comprises concrete and carbon fiber cloth, the steel bars and / or the carbon fiber cloth are arranged below the beam-slab, and the steel bar area A required in the beam-slab structure is determined according to any one of the beam-slab structure design methods described above. s and / or the carbon fiber cloth area A cf .

[0029] Furthermore, the beam-slab structure comprises the concrete and the steel bars, and the carbon fiber cloth area A in the beam-slab structure is cf is zero; or

[0030] The beam-slab structure and the beam-slab include the concrete, the carbon fiber cloth, and the steel bars. In the beam-slab structure, the carbon fiber cloth and the steel bars can be replaced with equal strength.

[0031] The present application discloses a design method for a beam-slab structure with carbon fiber cloth, which first determines beam-slab parameters, concrete parameters, carbon fiber cloth parameters and / or steel bar parameters; then, the required steel bar area and / or carbon fiber cloth area in the beam-slab structure are determined based on the beam-slab parameters, concrete parameters, carbon fiber cloth parameters and / or steel bar parameters. The beam-slab parameters, concrete parameters, carbon fiber cloth parameters and / or steel bar parameters comprehensively affect the stability of the beam-slab structure. The design method of the present application determines the required steel bar area and / or carbon fiber cloth area in the beam-slab structure through the beam-slab parameters, concrete parameters, carbon fiber cloth parameters and / or steel bar parameters, which can ensure the reliability of the beam-slab structure design. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the overall structure of the beam and slab in the embodiment of the present application;

[0033] Figure 2 is a schematic diagram of beam and slab parameters in an embodiment of the present application;

[0034] Figure 3 It is a schematic flow chart of a method for designing a beam-slab structure with carbon fiber cloth in an embodiment of the present application;

[0035] Figure 4 It is a flowchart of the subdivided steps of step S02 in the embodiment of the present application.

[0036] In the accompanying drawings, the reference numerals represent: 1, beam and slab; 11, concrete; 12, carbon fiber cloth; 13, steel bar. DETAILED DESCRIPTION

[0037] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0038] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "circumferential", "radial" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0039] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0040] As attached Figure 1 As shown, it is a schematic diagram of the overall structure of the beam plate 1 in the embodiment of the present application. Figure 1 It can be seen that the cross section of the beam 1 is rectangular, and the beam 1 includes concrete 11, steel bars 13 and carbon fiber cloth 12. The steel bars 13 and carbon fiber cloth 12 are arranged below the beam 1, that is, the steel bars 13 and carbon fiber cloth 12 are arranged close to the bottom of the beam 1, but there is a certain distance between the steel bars 13 and the carbon fiber cloth 12 and the bottom of the beam 1. For example, the carbon fiber cloth 12 is arranged above the steel bars 13 and can be laid on the steel bars 13. On the one hand, the carbon fiber cloth 12 can withstand a part of the tension and pressure and can be used as the steel bars 13, so that the beam 1 does not need to be provided with multiple layers of steel bars 13 to enhance stability. The steel bars 13 are laid in one layer, and the carbon fiber cloth 12 is laid on the steel bars 13 to replace one layer of steel bars 13, so that the steel bars 13 do not need to be cross- and overlapped in the beam 1 structure, which can reduce the construction difficulty. On the other hand, laying the carbon fiber cloth 12 above the steel bars 13 and using the carbon fiber cloth 12 instead of the steel bars 13 can reduce the corrosion of the steel bars 13 and improve the durability and stability of the beam 1.

[0041] In some embodiments, the cross section of the beam slab 1 is rectangular, and the beam slab 1 includes concrete 11 and steel bars 13. In other embodiments, the cross section of the beam slab 1 is rectangular, and the beam slab 1 includes concrete 11 and carbon fiber cloth 12. The structure of the beam slab 1 can be determined according to actual conditions, and the present application does not limit the specific structure of the beam slab 1.

[0042] As attached Figure 2 As shown in FIG. 1 , it is a schematic diagram of the parameters of the beam and slab in the embodiment of the present application; as shown in FIG. Figure 3 , which is a schematic diagram of the process flow of the beam-slab 1 structural design method in the embodiment of the present application. The beam-slab 1 design method is applied to any beam-slab 1 in the above embodiments. Figure 2 It can be seen that the beam-slab 1 design method includes step S01 and step S02.

[0043] S01: Determine beam and slab parameters, concrete parameters, carbon fiber cloth parameters and / or steel bar parameters.

[0044] S02: Determine the required steel bar area A in the beam-slab structure based on beam-slab parameters, concrete parameters, carbon fiber cloth parameters and / or steel bar parameterss and / or carbon fiber cloth area A cf .

[0045] The beam-slab parameters, concrete parameters, carbon fiber cloth parameters and / or steel bar parameters comprehensively affect the stability of the beam-slab structure. The design method of the present application determines the required steel bar area and / or carbon fiber cloth area in the beam-slab structure through the beam-slab parameters, concrete parameters, carbon fiber cloth parameters and / or steel bar parameters, so as to ensure the stability and reliability of the beam-slab structure.

[0046] The beam and slab parameters include the beam section width b. The concrete parameters include the concrete compressive strength value f c and the height x of the concrete compression zone, where x satisfies x ≤ ξ b h0,ξ b is the relative compression zone height, and h0 is the effective height of the section. The carbon fiber cloth parameters include the tensile strength f cf and the elastic modulus E of carbon fiber cloth cf ; Steel bar parameters include the tensile strength of steel bars f y and the elastic modulus E of the steel bar s .

[0047] As attached Figure 4 As shown, in some embodiments, step S02 determines the required steel bar area A in the beam-slab structure according to the beam-slab parameters, concrete parameters, carbon fiber cloth parameters and / or steel bar parameters. s and / or carbon fiber cloth area A cf , including step S21, step S22, step S23, and step S24.

[0048] S21: Determine the resultant pressure C of the concrete compression zone and the tensile force T borne by the carbon fiber cloth cf And the tensile force T borne by the steel bar s .

[0049] The resultant pressure C in the concrete compression zone is the concrete compressive strength value f c , the product of the beam section width b and the height x of the concrete compression zone, that is, the resultant pressure force of the concrete compression zone C = α1f c bx, (α1 is the coefficient, α1 value is 1). The tensile force T borne by the carbon fiber cloth cf is the tensile strength of carbon fiber cloth cf and carbon fiber cloth area A cf The product of the tensile force T borne by the carbon fiber cloth cf =f cf A cf The tensile force T borne by the steel bar s is the tensile strength of the steel bar f y and steel bar area A sThe product of the tensile force T borne by the steel bar s =f y A s .

[0050] S22: According to the principle of force balance, the resultant pressure C in the compression zone of the concrete is equal to the tensile force T borne by the carbon fiber cloth. cf , or the tensile force T borne by the steel bar s , or the tensile force T borne by the carbon fiber cloth cf And the tensile force T borne by the steel bar s The sum.

[0051] That is, the resultant pressure in the concrete compression zone C = T cf +T s , and then we get α1f c bx=f cf A cf +f y A s .

[0052] S23: Based on the deformation coordination equation, derive the first relationship for the height x of the concrete compression zone.

[0053] S24: According to the first relationship, the pressure force C in the concrete compression zone and the tensile force T borne by the carbon fiber cloth cf And the tensile force T borne by the steel bar s , determine the required steel reinforcement area A in the beam-slab structure s and / or carbon fiber cloth area A cf .

[0054] The principle of comprehensive force balance, deformation coordination equation, and the resultant pressure force of the concrete compression zone C, the tensile force T borne by the carbon fiber cloth cf And the tensile force T borne by the steel bar s The relationship C = T cf +T s , convert the steel bar area A s and / or carbon fiber cloth area A cf . Force balance principle, deformation coordination equation and relationship C = T cf +T s , the steel bar area A converted by these principles and relationships s and / or carbon fiber cloth area A cf It can make the beam-slab structure stable and reliable.

[0055] In some embodiments, step S23, deriving a first relationship of the height x of the concrete compression zone according to the deformation coordination equation, includes step S231 and step S232.

[0056] S231: Assuming the edge strain ε of the concrete compression zonec , the strain of carbon fiber cloth ε cf , the strain of the steel bar ε s ;

[0057] The carbon fiber cloth and the steel bar are roughly at the same height of the beam and slab, and the strain ε of the carbon fiber cloth c f and the strain ε of the reinforcement s The same, that is, ε cf =ε s .

[0058] S232: According to the deformation coordination equation and as well as and The first relation is derived as h is the height position of carbon fiber cloth or steel bar, and h0 is the effective height of the beam and slab section.

[0059] For example, according to the plane section assumption, And the relationship formula based on material stress and strain get According to get Similarly, according to and get According to get

[0060] When all steel bars are replaced by carbon fiber cloth, the first relationship can be obtained as follows:

[0061] In some embodiments, step S24, according to the first relationship, the resultant pressure force C of the concrete compression zone, and the tensile force T borne by the carbon fiber cloth, cf And the tensile force T borne by the steel bar s , determine the required steel reinforcement area A in the beam-slab structure s and / or carbon fiber cloth area A cf , including step S241, step S242 and step S243.

[0062] S241: Based on the combined pressure force C in the concrete compression zone and the tensile force T borne by the carbon fiber cloth cf And the tensile force T borne by the steel bar s Determine the second relationship C = T c f +T s .

[0063] The resultant pressure C in the concrete compression zone is shared by the steel bars and / or carbon fiber cloth. If there are only steel bars in the beam-slab, the resultant pressure C in the concrete compression zone is completely borne by the steel bars, and the tensile force T borne by the steel bars in the beam-slab structure s Greater than or equal to the resultant pressure C in the concrete compression zone. If there is only carbon fiber cloth in the beam-slab, then the resultant pressure C in the concrete compression zone is completely borne by the carbon fiber cloth, and the tensile force T borne by the carbon fiber cloth in the beam-slab structure cf Greater than or equal to the resultant pressure C in the concrete compression zone. If there are steel bars and carbon fiber cloth in the beam slab, the resultant pressure C in the concrete compression zone is shared by the steel bars and / or carbon fiber cloth, that is, the tensile force T borne by the carbon fiber cloth cf and the tensile force T borne by the steel bar s The sum of the tensile force T borne by the carbon fiber cloth is greater than or equal to the resultant pressure C of the concrete compression zone. cf and the tensile force T borne by the steel bar s This is explained by taking the example that the sum of is equal to the resultant pressure C in the concrete compression zone.

[0064] S242: According to the second relational expression C=T cf +T s , determine the third relationship α1f c bx=f cf A cf +f y A s (α1 is a coefficient, and α1 value is 1).

[0065] S243: According to the first relation And the third relation α1f c bx=f cf A cf +f y A s , derive the required steel reinforcement area A in the beam-slab structure s and / or carbon fiber cloth area A cf .

[0066] The above calculation process has a specific basis, and this basis is obtained based on the force balance principle and deformation law of mechanics. The calculation logic is reasonable, and the obtained steel bar area A s and / or carbon fiber cloth area A cf It is more reliable, thus making the beam-slab structure more stable.

[0067] In some embodiments, step S243, according to the first relational expression And the third relation α1f c bx=f cf A cf +f y A s, derive the required steel reinforcement area A in the beam-slab structure s and / or carbon fiber cloth area A cf , including step S2431.

[0068] S2431: According to the first and third equations, the carbon fiber cloth area can be derived Steel bar area

[0069] It can be understood that the carbon fiber cloth area A cf and steel bar area A s It is possible to determine one of the areas based on the actual situation, and then cf and / or steel bar area A s For example, the beam and slab designer first determines the steel bar area A used in the beam and slab based on the price and stock of steel bars. s Then according to the area of ​​carbon fiber cloth Calculate the area A of the carbon fiber cloth c f , so that the carbon fiber cloth bears the tensile force T cf and the tensile force T borne by the steel bar s The sum of the pressure in the concrete compression zone is equal to C, which ensures the reliability of the beam-slab structure design. In another example, the beam-slab designer first determines the area of ​​carbon fiber cloth used in the beam-slab based on the price and inventory of carbon fiber cloth. cf Then according to the steel area Calculate the steel bar area A s , so that the carbon fiber cloth bears the tensile force T cf and the tensile force T borne by the steel bar s The sum is equal to the resultant pressure C in the concrete compression zone to ensure the reliability of the beam-slab structure design.

[0070] In some embodiments, after step S02, the beam-slab design method includes step S03.

[0071] Step S03: Determine the required steel bar area A in the beam-slab structure s After that, according to the area of ​​carbon fiber cloth Calculate the required carbon fiber cloth area A in the beam-slab structure cf .

[0072] Carbon fiber cloth area A cf and steel bar area A s It is possible to determine one of the areas based on the actual situation, and then cf and / or steel bar area A sFor example, the beam and slab designer first determines the steel bar area A used in the beam and slab based on the price and stock of steel bars. s , and then according to the area of ​​carbon fiber cloth Calculate the required carbon fiber cloth area A in the beam-slab structure c f In this way, the tensile force T of the carbon fiber cloth can be guaranteed. cf and the tensile force T borne by the steel bar s The sum is equal to the resultant pressure C in the concrete compression zone, thereby ensuring the reliability of the beam-slab structure design.

[0073] In some other embodiments, after step S02, the beam-slab design method includes step S03'.

[0074] S03`: Determine the required carbon fiber cloth area A in the beam-slab structure cf After that, according to the steel bar area Calculate the required reinforcement area A in the beam-slab structure s Similarly, the carbon fiber cloth area A cf and steel bar area A s It is possible to determine one of the areas based on the actual situation, and then cf and / or steel bar area A s For example, the beam and slab designer first determines the area A of the carbon fiber cloth used in the beam and slab based on the price and stock of the carbon fiber cloth. cf , and then according to the steel area Calculate the required reinforcement area A in the beam-slab structure s In this way, the tensile force T of the carbon fiber cloth can be guaranteed. cf and the tensile force T borne by the steel bar s The sum is equal to the resultant pressure C in the concrete compression zone, thereby ensuring the reliability of the beam-slab structure design.

[0075] For example, when determining the carbon fiber cloth area A cf and steel bar area A s Finally, the area of ​​the carbon fiber cloth and / or the area of ​​the steel bar used in the beam and slab can be larger than the area calculated by the method of the present application, so that the tensile force T borne by the carbon fiber cloth is cf and the tensile force T borne by the steel bar s The sum is greater than the resultant pressure C in the concrete compression zone to enhance the reliability of the beam-slab structure design.

[0076] In some embodiments, the beam-slab structure includes concrete, carbon fiber cloth, and steel bars, and the carbon fiber cloth and the steel bars in the beam-slab structure can be replaced with equal strength. It can be understood that equal strength replacement means that the force bearing capacity of the steel bar used to replace the carbon fiber cloth is equal to the force bearing capacity of the replaced carbon fiber cloth. Similarly, the force bearing capacity of the carbon fiber cloth used to replace the steel bar is equal to the force bearing capacity of the replaced steel bar.

[0077] In some embodiments, there are steel bars and carbon fiber cloth in the actual beam slab, so the pressure resultant C of the concrete compression zone is shared by the steel bars and / or carbon fiber cloth, that is, the tensile force T borne by the carbon fiber cloth cf and the tensile force T borne by the steel bar s The sum is greater than or equal to the resultant pressure C in the concrete compression zone. The theoretical required steel bar area in the beam-slab structure can be calculated first, including concrete and steel bars, without carbon fiber cloth, and then the actual required steel bar area in the beam-slab can be determined based on the actual situation. Since there are steel bars and carbon fiber cloth in the actual beam-slab, the carbon fiber cloth can replace the steel bars to bear the tensile force, so the actual required steel bar area in the beam-slab is less than the theoretical required steel bar area in the beam-slab. Finally, after determining the actual required steel bar area in the beam-slab, according to the carbon fiber cloth area Calculate the required carbon fiber cloth area A in the beam-slab structure cf In this way, the tensile force T of the carbon fiber cloth can be guaranteed. cf and the tensile force T borne by the steel bar s The sum is equal to the resultant pressure C in the concrete compression zone, thereby ensuring the reliability of the beam-slab structure design.

[0078] In some embodiments, the beam-slab structure comprises the concrete and the carbon fiber cloth, and the steel bar area A in the beam-slab structure s is zero. Then the carbon fiber cloth area The carbon fiber cloth area A can be directly calculated cf .

[0079] In some embodiments, there are steel bars and carbon fiber cloth in the actual beam slab, so the pressure resultant C of the concrete compression zone is shared by the steel bars and / or carbon fiber cloth, that is, the tensile force T borne by the carbon fiber cloth cf and the tensile force T borne by the steel bar s The sum is greater than or equal to the resultant pressure C in the concrete compression zone. You can first calculate the theoretically required carbon fiber cloth area in the beam-slab structure, which includes concrete and carbon fiber cloth, without steel bars. Then, based on the actual situation, determine the actual carbon fiber cloth area required in the beam-slab. Since there are steel bars and carbon fiber cloth in the actual beam-slab, and the steel bars can replace the carbon fiber cloth to bear the tension, the actual carbon fiber cloth area required in the beam-slab is less than the theoretically required carbon fiber cloth area in the beam-slab. Finally, after determining the actual carbon fiber cloth area required in the beam-slab, calculate the actual carbon fiber cloth area based on the steel bar area. Calculate the required reinforcement area A in the beam-slab structure s In this way, the tensile force T of the carbon fiber cloth can be guaranteed. cf and the tensile force T borne by the steel bar s The sum is equal to the resultant pressure C in the concrete compression zone, thereby ensuring the reliability of the beam-slab structure design.

[0080] The present application also provides a beam-slab 1, the cross section of the beam-slab 1 is rectangular, the beam-slab 1 includes concrete 11, steel bars 13, and carbon fiber cloth 12, or the beam-slab includes concrete 11 and carbon fiber cloth 12, the steel bars 13 and / or the carbon fiber cloth 12 are arranged below the beam-slab 1, and the steel bar area A required in the beam-slab 1 structure is determined according to the beam-slab 1 structure design method in any of the above embodiments. s and / or the carbon fiber cloth area A cf .

[0081] In some embodiments, the beam-slab 1 structure includes the concrete 11, the carbon fiber cloth 12, and the steel bars 13. In the beam-slab structure, the carbon fiber cloth and the steel bars can be replaced with equal strength.

[0082] In some embodiments, the beam-slab 1 structure includes the concrete 11 and the carbon fiber cloth 12, and the steel bar area A in the beam-slab 1 structure is s is zero.

[0083] The present application also provides a readable medium, which includes execution instructions. When a processor of an electronic device executes the execution instructions, the electronic device executes the beam-slab 1 structural design method in any one of the above embodiments.

[0084] The present application also provides an electronic device, which includes a processor and a memory storing execution instructions. When the processor executes the execution instructions stored in the memory, the processor executes the beam-slab 1 structural design method in any one of the above-mentioned embodiments.

[0085] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A method for designing a carbon fiber cloth beam-slab structure, characterized in that: The beam-slab design method is applied to a beam-slab, the cross section of the beam-slab is rectangular, the beam-slab comprises concrete, steel bars, and carbon fiber cloth, or the beam-slab comprises concrete and carbon fiber cloth, the steel bars and / or the carbon fiber cloth are arranged below the beam-slab, and the beam-slab design method comprises: Determine beam and slab parameters, concrete parameters, carbon fiber cloth parameters and / or steel bar parameters; Determine the required steel bar area A in the beam-slab structure according to the beam-slab parameters, the concrete parameters, the carbon fiber cloth parameters and / or the steel bar parameters s and / or the carbon fiber cloth area A cf ; The beam-slab parameters include the beam section width b; the concrete parameters include the concrete compressive strength value f c and the height x of the concrete compression zone; the carbon fiber cloth parameters include the tensile strength f of the carbon fiber cloth cf and the elastic modulus E of carbon fiber cloth cf ; The steel bar parameters include the tensile strength of the steel bar f y and the elastic modulus E of the steel bar s .

2. The beam-slab structure design method according to claim 1, characterized in that: The steel bar area A required in the beam-slab structure is determined according to the beam-slab parameters, the concrete parameters, the carbon fiber cloth parameters and / or the steel bar parameters. s and / or the carbon fiber cloth area A cf ,include: Determine the resultant pressure C of the concrete compression zone and the tensile force T borne by the carbon fiber cloth cf And the tensile force T borne by the steel bar s , where the resultant pressure C in the concrete compression zone is the concrete compressive strength value f c , the product of the beam section width b and the height x of the concrete compression zone; the tensile force T borne by the carbon fiber cloth cf is the tensile strength f of the carbon fiber cloth cf and the carbon fiber cloth area A cf The product of the tensile force T borne by the steel bar s is the tensile strength of the steel bar f y and the steel bar area A s The product of According to the principle of force balance, the resultant pressure C in the compression zone of the concrete is equal to the tensile force T borne by the carbon fiber cloth. cf , or the tensile force T borne by the steel bar s , or the tensile force T borne by the carbon fiber cloth cf And the tensile force T borne by the steel bar s of and; The first relational expression for the height x of the concrete compression zone is derived from the deformation coordination equation; According to the first relationship, the pressure force C in the concrete compression zone and the tensile force T borne by the carbon fiber cloth cf And the tensile force T borne by the steel bar s , determine the required steel bar area A in the beam-slab structure s and / or the carbon fiber cloth area A cf .

3. The beam-slab structure design method according to claim 2, characterized in that: The first relational expression for deriving the height x of the concrete compression zone according to the deformation coordination equation includes: Assume that the edge strain ε of the concrete compression zone is c , the strain of carbon fiber cloth ε cf , the strain of the steel bar ε s Wherein, the carbon fiber cloth and the steel bar are approximately at the same height position of the beam plate, and the strain ε of the carbon fiber cloth cf and the strain ε of the reinforcement s same; According to the deformation coordination equation as well as and The first relationship is derived as h is the height position of the carbon fiber cloth or the steel bar, and h0 is the effective height of the cross section of the beam and slab.

4. The beam-slab structure design method according to claim 3, characterized in that: According to the first relational formula, the resultant pressure force C of the concrete compression zone and the tensile force T borne by the carbon fiber cloth cf And the tensile force T borne by the steel bar s , determine the required steel bar area A in the beam-slab structure s and / or the carbon fiber cloth area A cf ,include: According to the pressure resultant force C of the concrete compression zone and the tensile force T borne by the carbon fiber cloth cf And the tensile force T borne by the steel bar s Determine the second relationship C = T cf +T s ; According to the second relation C = T cf +T s , determine the third relationship α1f c bx=f cf A cf +f y A s (α1 is a coefficient, and α1 value is 1); According to the first relation And the third relation α1f c bx=f cf A cf +f y A s , derive the required steel bar area A in the beam-slab structure s and / or the carbon fiber cloth area A cf .

5. The beam-slab structure design method according to claim 4, characterized in that: According to the first relational expression And the third relation α1f c bx=f cf A cf +f y A s , derive the required steel bar area A in the beam-slab structure s and / or the carbon fiber cloth area A cf ,include: According to the first relational expression and the third relational expression, the carbon fiber cloth area can be derived as The steel bar area 6. The beam-slab structure design method according to claim 5, characterized in that: The beam-slab design method comprises: Determine the required steel bar area A in the beam-slab structure s After that, according to the carbon fiber cloth area Calculate the carbon fiber cloth area A required in the beam-slab structure cf ;or Determine the carbon fiber cloth area A required in the beam-slab structure cf After that, according to the steel bar area Calculate the required steel bar area A in the beam-slab structure s .

7. The beam-slab structure design method according to claims 1-6, characterized in that: The beam-slab structure and the beam-slab include the concrete, the carbon fiber cloth, and the steel bars. In the beam-slab structure, the carbon fiber cloth and the steel bars can be replaced with equal strength.

8. The beam-slab structure design method according to claims 1-6, characterized in that: The beam-slab structure includes the concrete and the carbon fiber cloth. The steel bar area A in the beam-slab structure s is zero.

9. A beam slab, characterized in that: The cross section of the beam-slab is rectangular, the beam-slab comprises concrete, steel bars, and carbon fiber cloth, or the beam-slab comprises concrete and carbon fiber cloth, the steel bars and / or the carbon fiber cloth are arranged below the beam-slab, and the steel bar area A required in the beam-slab structure is determined according to the beam-slab structure design method according to any one of claims 1 to 8. s and / or the carbon fiber cloth area A cf .

10. The beam slab according to claim 9, characterized in that: The beam-slab structure and the beam-slab include the concrete, the carbon fiber cloth, and the steel bars. In the beam-slab structure, the carbon fiber cloth and the steel bars can be replaced with equal strength.

Images