Method for analyzing the coefficient of variation of the bearing capacity of concrete members based on statistical experimental data

A technology of statistical experiment and coefficient of variation, applied in the fields of electrical digital data processing, special data processing application, calculation, etc., can solve the problems of uncertainty analysis of the bearing capacity of concrete members, and achieve the effect of good application and standard guidance.

Pending Publication Date: 2018-10-12
CHINA ACAD OF BUILDING RES
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Problems solved by technology

[0010] In order to solve the above-mentioned problems existing in the prior art, the present invention provides a method for analyzing the coefficient of variation of the bearing capacity of concrete members based on statistical experimental data to solve the problem of uncertainty analysis of the bearing capacity of concrete members

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  • Method for analyzing the coefficient of variation of the bearing capacity of concrete members based on statistical experimental data
  • Method for analyzing the coefficient of variation of the bearing capacity of concrete members based on statistical experimental data
  • Method for analyzing the coefficient of variation of the bearing capacity of concrete members based on statistical experimental data

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Embodiment 1

[0036] Example 1: Analysis method of variation coefficient of bearing capacity of axially compressed members

[0037] The method for analyzing the variation coefficient of the concrete component bearing capacity based on statistical experiment data of the present invention comprises the following steps:

[0038] Step (1): Establishment and formation of the physical model, including the following steps

[0039] Step (1.1): Standardized member bearing capacity design formula N(X)

[0040] "Code for Design of Concrete Structures" (GB50010-2010):

[0041]

[0042] In the formula: N—design value of axial pressure;

[0043] — the stability coefficient of reinforced concrete members;

[0044] f c - design value of concrete axial compressive strength;

[0045] f' y — design value of compressive strength of longitudinal reinforcement;

[0046] A - cross-sectional area of ​​the member;

[0047] A' s ——the cross-sectional area of ​​all longitudinal common steel bars;

[00...

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Abstract

The invention relates to a method for analyzing the coefficient of variation of the bearing capacity of concrete members based on statistical experimental data, belonging to the technical field of structural reliability analysis. The method comprises the following steps of: establishing and forming a physical model, comprising the design formula N (X) of the bearing capacity of the normalized member; setting the basic formula Nmod (X); setting up physical model Nphy; determining the uncertainty coefficient of variation delt un, N of bearing capacity, using the physical model of bearing capacity Nphy to analyze the test result Ntest of batch member bearing capacity, using the sample mean value mzeta of Ntest and Nphy ratio zeta, wherein N measures the coincidence degree between them; amongthem, the adjustment target of each coefficient in Nphy makes mzeta approach to 1.0 from the direction bigger than 1.0, and the sample standard deviation S zeta N gets a smaller value. The method caneffectively reduce the uncertainty factors of the model in the coefficient of variation of bearing capacity, and can make up for the shortcomings of using only partial coefficient of material performance. It has good application and guidance functions.

Description

technical field [0001] The invention relates to a method for analyzing the uncertainty of bearing capacity, in particular to a method for analyzing the variation coefficient of bearing capacity of concrete components based on statistical experimental data, and belongs to the technical field of structural reliability analysis. Background technique [0002] The discreteness of material strength is indeed one of the factors causing the difference in component bearing capacity. When it is in an absolute dominant position, it can become the main factor for calibrating the material partial coefficient, especially when there is a lack of experimental research data on component bearing capacity. When the factor of geometric parameter deviation has been considered in the design formula of component bearing capacity, this factor may also not be used as the uncertainty factor of component bearing capacity. "GB50153 seems to have such provisions. This factor is generally used as α k e...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/20G06F2119/06
Inventor 常乐邸小坛
Owner CHINA ACAD OF BUILDING RES
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