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Method for Determining Probability Eigenvalues ​​of Ultimate Bond Strength of Deformed Steel Bars in Concrete

A technology of deformed steel bars and bond strength, applied in special data processing applications, instruments, geometric CAD, etc., can solve problems such as inability to calculate and determine

Active Publication Date: 2021-04-09
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the calculated value of the above-mentioned ultimate bond strength calculation method can only correspond to a specific guarantee rate, and cannot calculate and determine the probability characteristic value of the ultimate bond strength corresponding to different guarantee rates according to design needs

Method used

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  • Method for Determining Probability Eigenvalues ​​of Ultimate Bond Strength of Deformed Steel Bars in Concrete
  • Method for Determining Probability Eigenvalues ​​of Ultimate Bond Strength of Deformed Steel Bars in Concrete
  • Method for Determining Probability Eigenvalues ​​of Ultimate Bond Strength of Deformed Steel Bars in Concrete

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specific example

[0034] This example is to use the method of the present invention to determine the probability characteristic value of the ultimate bond strength of deformed steel bars in concrete, calculate the mean value and standard deviation of the ultimate bond strength of deformed steel bars in concrete, and construct the probability density function and cumulative value of the ultimate bond strength The distribution function determines the probability distribution characteristic of the ultimate bond strength, and determines a specific instance of the probability characteristic value of the ultimate bond strength with a predetermined guarantee rate, comprising the following steps:

[0035] (1) Calculate the mean and standard deviation of the ultimate bond strength of deformed steel bars in concrete.

[0036] The concrete tensile strength f of a reinforced concrete beam is known ct = 1.82MPa, the minimum concrete cover thickness c of the deformed steel bar min =25.40mm, the diameter of ...

Embodiment 2

[0050] This example is to use the method of the present invention to determine the probability characteristic value of the ultimate bond strength of deformed steel bars in concrete, calculate the mean value and standard deviation of the ultimate bond strength of deformed steel bars in concrete, and construct the probability density function and cumulative value of the ultimate bond strength The distribution function determines the probability distribution characteristics of the ultimate bond strength, determines the probability characteristic value of the ultimate bond strength with a predetermined guarantee rate, and compares it with the test value of the ultimate bond strength and the calculated value of the traditional deterministic calculation method. Examples include the following steps:

[0051] (1) Calculate the mean and standard deviation of the ultimate bond strength of deformed steel bars in concrete.

[0052] Given 6 reinforced concrete beams with the same design pa...

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Abstract

A method for determining the probability distribution characteristics and probability eigenvalues ​​of the ultimate bond strength of deformed steel bars in concrete, comprising the following steps: (1) calculating the mean value and standard deviation of the ultimate bond strength of deformed steel bars in concrete; The probability density function of the ultimate bond strength of steel bars, to determine the probability distribution characteristics of the ultimate bond strength; (3) Construct the cumulative distribution function of the ultimate bond strength of deformed steel bars in concrete, and determine the probability characteristic value of the ultimate bond strength with a predetermined guarantee rate . This method can not only use the constructed probability density function to determine the probability distribution characteristics of the ultimate bond strength of deformed steel bars in concrete, but also determine the probability eigenvalues ​​of the ultimate bond strength with different guarantee rates according to the constructed cumulative distribution function, thereby overcoming Technical flaws in traditional deterministic computing methods.

Description

technical field [0001] The invention relates to a method for determining the probability characteristic value of the ultimate bonding strength of deformed steel bars in concrete, which belongs to the analysis method of reinforced concrete components. Background technique [0002] Sufficient bonding strength between deformed steel bars and concrete is the basis for ensuring the effective transfer of working stress between the two. If the ultimate bond strength of the deformed steel bars in the concrete is insufficient, relative slippage will occur between the deformed steel bars and the concrete, which will lead to cracking of the reinforced concrete members or excessive joint rotation angle, which will not only affect the normal use function of the reinforced concrete members, but also cause Reduce the load-carrying capacity of reinforced concrete members. Therefore, accurate analysis of the ultimate bond strength of deformed steel bars in concrete is of great significance ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/13G06F119/14
CPCG06F30/13G06F2119/06
Inventor 余波唐睿楷万伟伟陈正
Owner GUANGXI UNIV