Entropy method for determining concrete-filled steel tube bearing force design error distribution

A technology of concrete filled steel tube and design error, which is applied in the direction of calculation, special data processing application, instrument, etc., to achieve the effect of simple technical characteristics and convenient use

Inactive Publication Date: 2014-06-25
HOHAI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Purpose of the invention: the present invention provides an entropy method for determining the design error distribution of the concrete-filled steel pipe bearing capacity in view of the defects in determining the design error distribution of the concrete-filled steel pipe bearing capacity in the prior art

Method used

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  • Entropy method for determining concrete-filled steel tube bearing force design error distribution
  • Entropy method for determining concrete-filled steel tube bearing force design error distribution
  • Entropy method for determining concrete-filled steel tube bearing force design error distribution

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Embodiment 1

[0062] (1) The present invention takes the axial loading test of 250 circular steel tube concrete specimens as an example, and obtains the test data N of the bearing capacity of steel tube concrete e . (See: Data from Z.H.Lu, Y.G.Zhao, Z.W.Yu, F.X.Ding and T.Ono. Model error uncertainty in the design code provisions for circular CFT stub columns. Proceedings of the International Symposium on Reliability Engineering and Risk Management, 2,908 -918, 2010.).

[0063] (2) Using the steel pipe bearing capacity design codes of four different countries, including China's DL / T1999, Japan's AIJ1997, Europe's EU2004, and the United States' AISC2005, the bearing capacity of CFST is predicted N p .

[0064] (3) The expression of design error through bearing capacity:

[0065] M = N e N p

[0066] The sample data of M is calculated.

[0067] (4) Select stable dis...

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Abstract

The invention discloses an entropy method for determining concrete-filled steel tube bearing force design error distribution. First, concrete-filled steel tube bearing force design error distribution is depicted through candidate distribution, then the standard entropy and the forecast entropy of bearing force design errors are computed respectively, and finally through deviation indexes, the best distribution of the concrete-filled steel tube bearing force design errors is determined. According to the entropy method, the distribution of the concrete-filled steel tube bearing force design errors is selected, the uncertainty of bearing force error design data is fully considered, technology features are simple, and engineering technicians can use the method conveniently. The method can be used for forecasting the concrete-filled steel tube bearing force design errors, then the confidence interval of bearing force is estimated, the reference for designing a concrete-filled steel tube combination engineering structure is achieved, and great theoretical and engineering significance is achieved.

Description

technical field [0001] The invention belongs to the field of bearing capacity prediction of steel pipe concrete, in particular to an entropy method for determining the design error distribution of steel tube concrete bearing capacity. Background technique [0002] Concrete filled steel tube has the advantages of both steel structure and reinforced concrete structure. At present, this composite structure has been widely used in high-rise building projects, railway station projects, long-span bridge projects, etc. The bearing capacity of CFST depends on the interaction between the steel pipe and the core concrete in the component, and its fluctuation is relatively large due to the dispersion of the mechanical properties of the material. Therefore, accurate estimation of the bearing capacity of CFST can not only improve the safety of engineering structures, but also greatly save construction costs. [0003] In the existing methods for predicting the bearing capacity of CFST, t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00
Inventor 陈文梁英杰
Owner HOHAI UNIV
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