A design method for carbon fiber reinforced beam-slab structures and beam-slab

Abstract

This application provides a design method for a carbon fiber reinforced beam-slab structure. First, the beam-slab parameters, concrete parameters, carbon fiber fabric parameters, and reinforcement parameters are determined. Then, the required reinforcement area and carbon fiber fabric area in the beam-slab structure are determined based on these parameters. The beam-slab parameters, concrete parameters, carbon fiber fabric parameters, and reinforcement parameters comprehensively affect the stability of the beam-slab structure. The design method of this application determines the required reinforcement area and carbon fiber fabric area in the beam-slab structure by considering these parameters, thus ensuring the reliability of the beam-slab structure design.

Description

Technical Field

[0001] This application belongs to the technical field of beam-slab structures, and particularly relates to a design method for a beam-slab structure with carbon fiber fabric and the beam-slab itself. Background Technology

[0002] As the main structural members of a building that bear bending moments and shear forces, beams and slabs rely heavily on reinforcing steel bars, which bear both tensile and compressive forces. In complex beam-slab structures, multiple layers of reinforcing steel are required to enhance structural safety and stability; this involves overlapping and intersecting steel bars. However, this increases construction difficulty and efficiency. Related technologies utilize carbon fiber fabric to replace some or all of the reinforcing steel, thus solving the construction problems caused by dense binding and overlapping. However, when using both reinforcing steel and carbon fiber fabric in beam-slab structures, the required area of ​​both steel and carbon fiber fabric is a key factor affecting structural stability. Currently, there is no reliable design method for beam-slab structures to determine the required areas of both steel and carbon fiber fabric. Summary of the Invention

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

[0004] To address the aforementioned technical problems, in a first aspect, this application provides a design method for a carbon fiber reinforced beam-slab structure. The beam-slab design method is applied to a beam-slab, the beam-slab having a rectangular cross-section. The beam-slab includes concrete, reinforcing steel, and carbon fiber reinforced fabric, with the reinforcing steel and the carbon fiber reinforced fabric disposed below the beam-slab. The beam-slab design method includes:

[0005] Determine the parameters of the beam and slab, concrete, carbon fiber fabric, and reinforcement.

[0006] The required steel reinforcement area in the beam-slab structure is determined based on the beam-slab parameters, the concrete parameters, the carbon fiber fabric parameters, and the steel reinforcement parameters. and the area of ​​the carbon fiber cloth ;

[0007] The beam and slab parameters include the beam cross-section width. The concrete parameters include the concrete compressive strength value. and the height of the concrete compression zone The parameters of the carbon fiber cloth include the tensile strength of the carbon fiber cloth. And the elastic modulus of carbon fiber cloth The steel reinforcement parameters include the tensile strength of the steel reinforcement. And the elastic modulus of steel bars .

[0008] Furthermore, the step of determining the required steel reinforcement area and carbon fiber fabric area in the beam-slab structure based on the beam-slab parameters, the concrete parameters, the carbon fiber fabric parameters, and the steel reinforcement parameters... ,include:

[0009] Determine the resultant pressure in the compression zone of concrete The tensile force borne by the carbon fiber cloth and the tensile force borne by the steel bars The resultant pressure in the concrete compression zone Concrete compressive strength value Beam cross-section width and the height of the concrete compression zone The product of; the tensile force borne by the carbon fiber cloth. The tensile strength of the carbon fiber cloth and the area of ​​the carbon fiber cloth The product of; the tensile force borne by the steel bars. For the tensile strength of steel bars and the area of ​​the reinforcing bars The product;

[0010] Determine the resultant pressure in the compression zone of concrete based on the principle of force balance. Equal to the tensile force borne by the carbon fiber cloth The tensile force borne by the steel bars The tensile force borne by the carbon fiber cloth and the tensile force borne by the steel bars The sum of;

[0011] The height of the compression zone of concrete is derived based on the deformation compatibility equation. The first relation;

[0012] Based on the first relational equation, the resultant pressure in the concrete compression zone... The tensile force borne by the carbon fiber cloth and the tensile force borne by the steel bars Determine the required area of ​​reinforcing steel in the beam-slab structure. and the area of ​​the carbon fiber cloth .

[0013] Furthermore, the height of the concrete compression zone is derived based on the deformation compatibility equation. The first relation includes:

[0014] Assuming the strain at the edge of the concrete compression zone Strain of carbon fiber cloth Strain of steel bars Wherein, the carbon fiber cloth and the reinforcing steel are approximately at the same height position on the beam slab, and the strain of the carbon fiber cloth is... and the strain of the steel reinforcement same;

[0015] According to the deformation compatibility equation and ,as well as and The first relation is derived as follows: , The height position of the carbon fiber cloth and the reinforcing bar. The effective height of the beam section is given.

[0016] Furthermore, the resultant force of the pressure in the concrete compression zone according to the first relationship... The tensile force borne by the carbon fiber cloth and the tensile force borne by the steel bars Determine the required area of ​​reinforcing steel in the beam-slab structure. and the area of ​​the carbon fiber cloth ,include:

[0017] Based on the resultant pressure of the concrete compression zone The tensile force borne by the carbon fiber cloth and the tensile force borne by the steel bars Determine the second relation ;

[0018] According to the second relation Determine the third relation ( For coefficients, The value is 1).

[0019] According to the first relation and the third relation The required area of ​​reinforcing steel in the beam-slab structure is derived. and the area of ​​the carbon fiber cloth .

[0020] Furthermore, the statement based on the first relational expression and the third relation The required area of ​​reinforcing steel in the beam-slab structure is derived. and the area of ​​the carbon fiber cloth ,include:

[0021] Based on the first and third relationships, the area of ​​the carbon fiber cloth can be derived. The area of ​​the reinforcing bars = .

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

[0023] Determine the required area of ​​steel reinforcement in the beam-slab structure. Then, based on the area of ​​the carbon fiber cloth Calculate the required carbon fiber fabric area in the beam-slab structure. ;

[0024] Determine the required carbon fiber cloth area in the beam-slab structure. Then, based on the area of ​​the reinforcing bars = Calculate the required area of ​​the reinforcing steel in the beam-slab structure. .

[0025] Furthermore, the beam-slab structure includes the concrete, the carbon fiber cloth, and the reinforcing steel bars, wherein the carbon fiber cloth and the reinforcing steel bars in the beam-slab structure can be replaced with equal strength.

[0026] Furthermore, the beam-slab structure includes the concrete and the carbon fiber fabric, and the area of ​​the reinforcing steel in the beam-slab structure is... It is zero.

[0027] Secondly, this application provides a beam-slab structure with a rectangular cross-section. The beam-slab includes concrete, reinforcing bars, and carbon fiber fabric. The reinforcing bars and carbon fiber fabric are disposed below the beam-slab structure. The required area of ​​the reinforcing bars in the beam-slab structure is determined according to the beam-slab structure design method described in any of the above-mentioned methods. and the area of ​​the carbon fiber cloth .

[0028] Furthermore, the beam-slab structure includes the concrete and the reinforcing steel, and the area of ​​the carbon fiber fabric in the beam-slab structure... Zero; or

[0029] The beam-slab structure includes the concrete, the carbon fiber cloth, and the reinforcing steel bars, wherein the carbon fiber cloth and the reinforcing steel bars can be replaced with equal strength.

[0030] This application discloses a design method for a carbon fiber reinforced beam-slab structure. First, the beam-slab parameters, concrete parameters, carbon fiber fabric parameters, and reinforcement parameters are determined. Then, the required reinforcement area and carbon fiber fabric area in the beam-slab structure are determined based on these parameters. The beam-slab parameters, concrete parameters, carbon fiber fabric parameters, and reinforcement parameters comprehensively affect the stability of the beam-slab structure. This design method, by determining the required reinforcement area and carbon fiber fabric area in the beam-slab structure using these parameters, ensures the reliability of the beam-slab structure design. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the overall structure of the beam and slab in the embodiments of this application;

[0032] Figure 2 This is a schematic diagram of the parameters of the beam and slab in the embodiments of this application;

[0033] Figure 3 This is a flowchart illustrating the design method of the carbon fiber reinforced beam-plate structure in the embodiments of this application;

[0034] Figure 4 This is a flowchart illustrating the subdivided steps of step S02 in the embodiments of this application.

[0035] In the attached drawings, the reference numerals indicate: 1. Beam / slab; 11. Concrete; 12. Carbon fiber cloth; 13. Reinforcing steel. Detailed Implementation

[0036] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0037] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "circumferential", "radial", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0038] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0039] As attached Figure 1 The diagram shown is a schematic representation of the overall structure of beam-slab 1 in an embodiment of this application. (See attached diagram.) Figure 1 As can be seen from the diagram, the cross-section of beam slab 1 is rectangular. Beam slab 1 includes concrete 11, reinforcing bars 13, and carbon fiber cloth 12. The reinforcing bars 13 and carbon fiber cloth 12 are located below beam slab 1, that is, close to the bottom of beam slab 1, but with a certain distance between them and the bottom of beam slab 1. For example, carbon fiber cloth 12 is placed above reinforcing bars 13 and can be laid on top of them. On the one hand, carbon fiber cloth 12 can withstand some of the tensile and compressive forces and can be used as reinforcing bars 13, thus eliminating the need for multiple layers of reinforcing bars 13 to enhance stability in beam slab 1. By laying one layer of reinforcing bars 13 and placing carbon fiber cloth 12 on top of them, replacing one layer of reinforcing bars 13, the beam slab 1 structure does not need to have intersecting or overlapping reinforcing bars 13, reducing construction difficulty. On the other hand, laying carbon fiber cloth 12 on top of reinforcing bars 13, replacing them with carbon fiber cloth 12, can reduce the corrosion of reinforcing bars 13 and improve the durability and stability of beam slab 1.

[0040] In some embodiments, the beam-slab 1 has a rectangular cross-section and includes concrete 11 and reinforcing steel bars 13. In other embodiments, the beam-slab 1 has a rectangular cross-section and includes concrete 11 and carbon fiber cloth 12. The structure of the beam-slab 1 can be determined according to actual conditions, and this application does not limit the specific structure of the beam-slab 1.

[0041] As attached Figure 2 The diagram shown is a parameter schematic of the beam and slab in an embodiment of this application; as attached... Figure 3 The diagram shown is a flowchart illustrating the beam-slab 1 structural design method in an embodiment of this application. The beam-slab 1 design method is applied to any type of beam-slab 1 in the above embodiments. (See attached diagram...) Figure 2 It can be seen that the design method of beam 1 includes steps S01 and S02.

[0042] S01: Determine the parameters of the beam and slab, concrete, carbon fiber cloth, and reinforcement.

[0043] S02: Determine the required steel reinforcement area in the beam-slab structure based on beam-slab parameters, concrete parameters, carbon fiber cloth parameters, and steel reinforcement parameters. and carbon fiber cloth area .

[0044] The parameters of beams and slabs, concrete, carbon fiber cloth, and steel reinforcement all comprehensively affect the stability of beam and slab structures. The design method of this application determines the required steel reinforcement area and carbon fiber cloth area in the beam and slab structure by using these parameters, which can ensure the stability and reliability of the beam and slab structure.

[0045] Beam and slab parameters include beam cross-section width Concrete parameters include concrete compressive strength values. and the height of the concrete compression zone ,in, Concealing , The relative height of the pressure zone is the boundary. This refers to the effective height of the cross-section. Carbon fiber fabric parameters include the tensile strength of the carbon fiber fabric. And the elastic modulus of carbon fiber cloth Reinforcing steel parameters include the tensile strength of the reinforcing steel. And the elastic modulus of steel bars .

[0046] As attached Figure 4 As shown, in some embodiments, step S02 involves determining the required steel reinforcement area in the beam-slab structure based on beam-slab parameters, concrete parameters, carbon fiber cloth parameters, and steel reinforcement parameters. and carbon fiber cloth area This includes steps S21, S22, S23, and S24.

[0047] S21: Determine the resultant pressure force in the compression zone of concrete. The tensile force borne by the carbon fiber cloth and the tensile force borne by the steel bars .

[0048] Resultant pressure in the compression zone of concrete Concrete compressive strength value Beam cross-section width and the height of the concrete compression zone The product of the two forces, i.e., the resultant pressure in the compression zone of the concrete. , ( For coefficients, The value is 1). The tensile force borne by the carbon fiber cloth. The tensile strength of carbon fiber cloth and carbon fiber cloth area The product of the two forces, i.e., the tensile force borne by the carbon fiber cloth. The tensile force borne by the steel reinforcement For the tensile strength of steel bars and the area of ​​reinforcing steel The product of the two forces, i.e., the tensile force borne by the steel bars. .

[0049] S22: Determine the resultant pressure in the compression zone of concrete based on the principle of force balance. Equal to the tensile force borne by the carbon fiber cloth The tensile force borne by the steel bars The tensile force borne by the carbon fiber cloth and the tensile force borne by the steel bars The sum of.

[0050] That is, the resultant force of pressure in the compression zone of concrete. And thus obtain .

[0051] S23: Derive the height of the concrete compression zone based on the deformation compatibility equation. The first relation.

[0052] S24: Based on the first relational formula, the resultant force of the pressure in the concrete compression zone The tensile force borne by the carbon fiber cloth and the tensile force borne by the steel bars Determine the required steel reinforcement area in the beam-slab structure. and carbon fiber cloth area .

[0053] The principle of comprehensive force equilibrium, deformation compatibility equation, and resultant pressure in the compression zone of concrete. The tensile force borne by the carbon fiber cloth and the tensile force borne by the steel bars relational formula Calculate the area of ​​the reinforcing steel. and carbon fiber cloth area The principle of force equilibrium, the equations of deformation compatibility, and related formulas. The area of ​​reinforcing steel bars calculated using these principles and formulas. and carbon fiber cloth area It can make beam and slab structures stable and reliable.

[0054] In some embodiments, step S23 involves deriving the height of the concrete compression zone based on the deformation compatibility equation. The first relation includes steps S231 and S232.

[0055] S231: Assume the edge strain of the concrete compression zone Strain of carbon fiber cloth Strain of steel bars ;

[0056] The carbon fiber fabric and reinforcing steel are at approximately the same height as the beam and slab. The strain of the carbon fiber fabric... and the strain of the reinforcing steel Same, that is = .

[0057] S232: According to the deformation compatibility equation and ,as well as and The first relation is derived as follows: , This refers to the height and position of the carbon fiber cloth and reinforcing steel. This represents the effective height of the beam / slab cross-section.

[0058] For example, based on the plane section assumption, And according to the material stress-strain relationship formula ,get Then according to get Similarly, according to and get Then according to get .

[0059] When carbon fiber cloth is used to replace steel bars entirely, the first relationship can be obtained as follows: .

[0060] In some embodiments, step S24 involves applying the first relationship and the resultant force of the pressure in the concrete compression zone. The tensile force borne by the carbon fiber cloth and the tensile force borne by the steel bars Determine the required steel reinforcement area in the beam-slab structure. and carbon fiber cloth area This includes steps S241, S242, and S243.

[0061] S241: Based on the resultant pressure in the compression zone of concrete The tensile force borne by the carbon fiber cloth and the tensile force borne by the steel bars Determine the second relation .

[0062] Resultant pressure in the compression zone of concrete The stress is shared by the steel reinforcement and carbon fiber fabric. If the beam and slab only contain steel reinforcement, then the resultant pressure in the concrete compression zone is... The tensile force is entirely borne by the steel reinforcement in the beam-slab structure. Greater than or equal to the resultant force of the concrete compression zone If the beam and slab contain only carbon fiber cloth, then the resultant pressure in the concrete compression zone will be... The tensile force in the beam-slab structure is entirely borne by carbon fiber fabric. Greater than or equal to the resultant force of the concrete compression zone If the beam / slab contains reinforcing steel and carbon fiber cloth, then the resultant pressure in the concrete compression zone... The tensile force is shared by the steel bars and the carbon fiber fabric, meaning the carbon fiber fabric bears the tensile force. And the tensile force borne by the steel bars The sum of these forces is greater than or equal to the resultant force of the pressure in the concrete compression zone. In this embodiment, the tensile force is borne by the carbon fiber cloth. And the tensile force borne by the steel bars The sum equals the resultant force of the pressure in the compression zone of the concrete. Let's take an example to illustrate.

[0063] S242: According to the second relation Determine the third relation ( For coefficients, The value is 1).

[0064] S243: According to the first relation and the third relation Derive the required steel reinforcement area in the beam-slab structure. and carbon fiber cloth area .

[0065] The above calculations are all based on specific principles, derived from the principles of force balance and deformation laws in mechanics. The calculation logic is sound, and the obtained steel reinforcement area is accurate. and carbon fiber cloth area It is relatively reliable, thus making the beam-slab structure more stable.

[0066] In some embodiments, step S243, according to the first relation and the third relation Derive the required steel reinforcement area in the beam-slab structure. and carbon fiber cloth area This includes step S2431.

[0067] S2431: Based on the first and third relations, the area of ​​carbon fiber cloth can be derived. Reinforcing steel area = .

[0068] Understandably, the area of ​​carbon fiber cloth and the area of ​​reinforcing steel You can first determine one area based on the actual situation, and then determine the area based on the carbon fiber cloth area. and the area of ​​reinforcing steel The calculation method determines another area. For example, beam and slab designers first determine the area of ​​the reinforcing steel used in the beams and slabs based on the price and availability of the steel bars. Then, based on the area of ​​the carbon fiber cloth Calculate the area of ​​carbon fiber cloth This allows the carbon fiber cloth to withstand the tensile force. And the tensile force borne by the steel bars The sum equals the resultant force of the pressure in the compression zone of the concrete. This ensures the reliability of the beam-slab structural design. In another example, the beam-slab designers first determine the area of ​​carbon fiber fabric used in the beam-slab based on the price and availability of carbon fiber fabric. Then based on the area of ​​the reinforcing steel = Calculate the area of ​​the reinforcing steel. This allows the carbon fiber cloth to withstand tensile forces. And the tensile force borne by the steel bars The sum equals the resultant force of the pressure in the compression zone of the concrete. This is to ensure the reliability of the beam-slab structure design.

[0069] In some embodiments, after step S02, the beam-slab design method includes step S03.

[0070] Step S03: Determine the required reinforcement area in the beam-slab structure. Then, based on the area of ​​the carbon fiber cloth Calculate the required carbon fiber fabric area in the beam-slab structure. .

[0071] carbon fiber cloth area and the area of ​​reinforcing steel You can first determine one area based on the actual situation, and then determine the area based on the carbon fiber cloth area. and the area of ​​reinforcing steel The calculation method determines another area. For example, beam and slab designers first determine the area of ​​steel reinforcement used in the beams and slabs based on the price and availability of the steel reinforcement. Then, based on the area of ​​the carbon fiber cloth Calculate the required carbon fiber fabric area in the beam-slab structure. This ensures that the carbon fiber cloth can withstand the tensile force. And the tensile force borne by the steel bars The sum equals the resultant force of the pressure in the compression zone of the concrete. This ensures the reliability of the beam-slab structure design.

[0072] In some other embodiments, after step S02, the beam-slab design method includes step S03'.

[0073] S03: Determine the required carbon fiber fabric area for the beam-slab structure. Then, based on the area of ​​the reinforcing steel bars = Calculate the required steel reinforcement area in the beam-slab structure. Similarly, the area of ​​carbon fiber cloth and the area of ​​reinforcing steel You can first determine one area based on the actual situation, and then determine the area based on the carbon fiber cloth area. and the area of ​​reinforcing steel The calculation method determines another area. For example, beam and slab designers first determine the area of ​​carbon fiber fabric used in the beams and slabs based on the price and availability of the carbon fiber fabric. Then based on the area of ​​the reinforcing steel = Calculate the required steel reinforcement area in the beam-slab structure. This ensures that the carbon fiber cloth can withstand the tensile force. And the tensile force borne by the steel bars The sum equals the resultant force of the pressure in the compression zone of the concrete. This ensures the reliability of the beam-slab structure design.

[0074] For example, in determining the area of ​​carbon fiber cloth and the area of ​​reinforcing steel Subsequently, the area of ​​carbon fiber fabric and steel reinforcement used in beams and slabs can be greater than the area calculated by the method of this application, thereby increasing the tensile force borne by the carbon fiber fabric. And the tensile force borne by the steel bars The sum of these forces is greater than the resultant force of the pressure in the concrete compression zone. To enhance the reliability of beam-slab structure design.

[0075] In some embodiments, the beam-slab structure includes concrete, carbon fiber fabric, and reinforcing steel bars, wherein the carbon fiber fabric and reinforcing steel bars can be replaced with equal strength. Understandably, equal strength replacement means that the load-bearing capacity of the reinforcing steel bars used to replace the carbon fiber fabric is equal to the load-bearing capacity of the replaced carbon fiber fabric. Similarly, the load-bearing capacity of the carbon fiber fabric used to replace the reinforcing steel bars is equal to the load-bearing capacity of the replaced reinforcing steel bars.

[0076] In some embodiments, the actual beams and slabs contain steel reinforcement and carbon fiber fabric, then the resultant pressure in the concrete compression zone... The tensile force is shared by the steel bars and the carbon fiber fabric, meaning the carbon fiber fabric bears the tensile force. And the tensile force borne by the steel bars The sum of these forces is greater than or equal to the resultant force of the pressure in the concrete compression zone. First, calculate the theoretically required steel reinforcement area in the beam-slab structure, including concrete and steel bars, without carbon fiber fabric. Then, determine the actual required steel reinforcement area based on the actual situation. Since the beam-slab structure contains both steel bars and carbon fiber fabric, and the carbon fiber fabric can replace the steel bars to bear tensile forces, the actual required steel reinforcement area is less than the theoretically required area. Finally, after determining the actual required steel reinforcement area, calculate the area based on the carbon fiber fabric area. Calculate the required carbon fiber fabric area in the beam-slab structure. This ensures that the carbon fiber cloth can withstand the tensile force. And the tensile force borne by the steel bars The sum equals the resultant force of the pressure in the compression zone of the concrete. This ensures the reliability of the beam-slab structure design.

[0077] In some embodiments, the beam-slab structure includes the concrete and the carbon fiber fabric, and the area of ​​the reinforcing steel in the beam-slab structure is... The area of ​​the carbon fiber cloth is zero. The area of ​​carbon fiber cloth can be calculated directly. .

[0078] In some embodiments, the actual beams and slabs contain steel reinforcement and carbon fiber fabric, then the resultant pressure in the concrete compression zone... The tensile force is shared by the steel bars and the carbon fiber fabric, meaning the carbon fiber fabric bears the tensile force. And the tensile force borne by the steel bars The sum of these forces is greater than or equal to the resultant force of the pressure in the concrete compression zone. First, calculate the theoretically required carbon fiber fabric area in the beam-slab structure, including concrete and carbon fiber fabric, without reinforcing steel. Then, determine the actual required carbon fiber fabric area based on the actual situation. Since the beam-slab structure contains both reinforcing steel and carbon fiber fabric in practice, and the reinforcing steel can bear the tensile force in place of the carbon fiber fabric, the actual required carbon fiber fabric area is less than the theoretically required area. Finally, after determining the actual required carbon fiber fabric area, calculate the area required based on the reinforcing steel area. = Calculate the required steel reinforcement area in the beam-slab structure. This ensures that the carbon fiber cloth can withstand the tensile force. And the tensile force borne by the steel bars The sum equals the resultant force of the pressure in the compression zone of the concrete. This ensures the reliability of the beam-slab structure design.

[0079] This application also provides a beam-slab 1 with a rectangular cross-section. The beam-slab 1 includes concrete 11, reinforcing bars 13, and carbon fiber cloth 12. The reinforcing bars 13 and the carbon fiber cloth 12 are disposed below the beam-slab 1. The required area of ​​the reinforcing bars in the beam-slab 1 structure is determined according to the beam-slab 1 structural design method in any of the above embodiments. and the area of ​​the carbon fiber cloth .

[0080] In some embodiments, the beam-slab 1 structure includes the concrete 11, carbon fiber cloth 12, and steel bars 13, wherein the carbon fiber cloth and the steel bars in the beam-slab structure can be replaced with equal strength.

[0081] In some embodiments, the beam-slab 1 structure includes the concrete 11 and the carbon fiber cloth 12, and the area of ​​the reinforcing steel in the beam-slab 1 structure is... It is zero.

[0082] This application also provides a readable medium, the readable medium including execution instructions, which, when executed by the processor of an electronic device, enable the electronic device to execute the beam-slab 1 structural design method in any of the above embodiments.

[0083] This 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 of the above embodiments.

[0084] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A design method for a carbon fiber reinforced beam-slab structure, characterized in that, The beam-slab structural design method is applied to beams and slabs, wherein the cross-section of the beams and slabs is rectangular, and the beams and slabs include concrete, reinforcing steel, and carbon fiber fabric. The reinforcing steel and the carbon fiber fabric are disposed below the beams and slabs. The beam-slab structural design method includes: Determine the parameters of the beam and slab, concrete, carbon fiber fabric, and reinforcement. The required steel reinforcement area in the beam-slab structure is determined based on the beam-slab parameters, the concrete parameters, the carbon fiber fabric parameters, and the steel reinforcement parameters. and the area of ​​the carbon fiber cloth ; The beam and slab parameters include the beam cross-section width. The concrete parameters include the concrete compressive strength value. and the height of the concrete compression zone The parameters of the carbon fiber cloth include the tensile strength of the carbon fiber cloth. And the elastic modulus of carbon fiber cloth The steel reinforcement parameters include the tensile strength of the steel reinforcement. And the elastic modulus of steel bars ; The required steel reinforcement area in the beam-slab structure is determined based on the beam-slab parameters, the concrete parameters, the carbon fiber fabric parameters, and the steel reinforcement parameters. and the area of ​​the carbon fiber cloth ,include: Determine the resultant pressure in the compression zone of concrete The tensile force borne by the carbon fiber cloth and the tensile force borne by the steel bars The resultant pressure in the concrete compression zone Concrete compressive strength value Beam cross-section width and the height of the concrete compression zone The product of; the tensile force borne by the carbon fiber cloth. The tensile strength of the carbon fiber cloth and the area of ​​the carbon fiber cloth The product of; the tensile force borne by the steel bars. For the tensile strength of steel bars and the area of ​​the reinforcing bars The product; Determine the resultant pressure in the compression zone of concrete based on the principle of force balance. Equal to the tensile force borne by the carbon fiber cloth The tensile force borne by the steel bars The tensile force borne by the carbon fiber cloth and the tensile force borne by the steel bars The sum of; The height of the compression zone of concrete is derived based on the deformation compatibility equation. The first relation; Based on the first relational equation, the resultant pressure in the concrete compression zone... The tensile force borne by the carbon fiber cloth and the tensile force borne by the steel bars Determine the required area of ​​reinforcing steel in the beam-slab structure. and the area of ​​the carbon fiber cloth ; The height of the concrete compression zone is derived based on the deformation compatibility equation. The first relation includes: Assuming the strain at the edge of the concrete compression zone Strain of carbon fiber cloth Strain of steel bars Wherein, the carbon fiber cloth and the reinforcing steel are at the same height position on the beam slab, and the strain of the carbon fiber cloth is... and the strain of the steel reinforcement same; According to the deformation compatibility equation and ,as well as and The first relation is derived as follows: , The height position of the carbon fiber cloth and the reinforcing bar. The effective height of the beam section is given.

2. The beam-slab structure design method according to claim 1, characterized in that, According to the first relationship, the resultant pressure of the concrete compression zone The tensile force borne by the carbon fiber cloth and the tensile force borne by the steel bars Determine the required area of ​​reinforcing steel in the beam-slab structure. and the area of ​​the carbon fiber cloth ,include: Based on the resultant pressure of the concrete compression zone The tensile force borne by the carbon fiber cloth and the tensile force borne by the steel bars Determine the second relation ; According to the second relation Determine the third relation , For coefficients, The value is 1; According to the first relation and the third relation The required area of ​​reinforcing steel in the beam-slab structure is derived. and the area of ​​the carbon fiber cloth .

3. The beam-slab structure design method according to claim 2, characterized in that, According to the first relational expression and the third relation The required area of ​​reinforcing steel in the beam-slab structure is derived. and the area of ​​the carbon fiber cloth ,include: Based on the first and third relationships, the area of ​​the carbon fiber cloth can be derived. The area of ​​the reinforcing bars = .

4. The beam-slab structure design method according to claim 3, characterized in that, The beam and slab design method includes: Determine the required area of ​​steel reinforcement in the beam-slab structure. Then, based on the area of ​​the carbon fiber cloth Calculate the required carbon fiber fabric area in the beam-slab structure. ; Determine the required carbon fiber cloth area in the beam-slab structure. Then, based on the area of ​​the reinforcing bars = Calculate the required area of ​​steel reinforcement in the beam-slab structure. .

5. The beam-slab structure design method according to any one of claims 1-4, characterized in that, The beam-slab structure includes the concrete, the carbon fiber cloth, and the reinforcing steel bars, wherein the carbon fiber cloth and the reinforcing steel bars can be replaced with equal strength.

6. The beam-slab structure design method according to any one of claims 1-4, characterized in that, The beam-slab structure includes the concrete and the carbon fiber fabric, and the area of ​​the reinforcing steel in the beam-slab structure is... It is zero.

7. A beam-slab structure, characterized in that, The beam-slab has a rectangular cross-section and includes concrete, reinforcing bars, and carbon fiber fabric. The reinforcing bars and carbon fiber fabric are disposed below the beam-slab. The required reinforcing bar area in the beam-slab structure is determined according to the beam-slab structure design method as described in any one of claims 1-4. and the area of ​​the carbon fiber cloth .

Images