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A complex geotechnical engineering reliability analysis device

A technology of geotechnical engineering and analysis device, applied in the field of geotechnical engineering, can solve problems such as adjusting step size, and achieve the effects of reducing workload, avoiding data errors and loss, and facilitating reliability analysis

Active Publication Date: 2018-02-09
TONGJI UNIV
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Problems solved by technology

During the iterative calculation of the response surface method, negative numbers are not allowed in the geotechnical parameters during the deterministic analysis. Since the iterative calculation is often performed manually, the sampling can be adjusted in time at each iteration The step size ensures that there are no negative numbers in the sampling points, but in order to achieve automatic calculation of reliability, the computer cannot intelligently adjust the step size in time for each step. Therefore, this method proposes a new response surface sampling method to ensure that all during the iterative calculation process The sampling points are all positive

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  • A complex geotechnical engineering reliability analysis device
  • A complex geotechnical engineering reliability analysis device
  • A complex geotechnical engineering reliability analysis device

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Embodiment 1

[0043] Such as figure 1 As shown, a complex geotechnical engineering reliability analysis device of the present invention consists of a center point conversion module 101, a sampling point generation module 102, a sampling point rotation module 103, a finite element analysis module 104, a reliability calculation module 105 and a process control module 106, wherein the central point conversion module 101, sampling point generation module 102, sampling point rotation module 103, reliability calculation module 105 and process control module 106 can all be realized by the functions of the numerical calculation software Matlab; and the finite element analysis module 104 Then the finite element analysis and calculation can be carried out through the finite difference program FLAC3D; since the data exchange of sampling points and limit equation values ​​needs to be carried out between Matlab and FLAC3D, the text file is used to realize the exchange between the two programs in this emb...

Embodiment 2

[0051] The reliability analysis device and principle proposed by the present invention will be introduced below by taking a soft soil foundation reinforced with deep mixing piles as an example. The layout of the investigated deep mixing piles and the distribution of soil layers are as follows: figure 2 and image 3 shown. The foundation soil is divided into two layers, the clay layer from 0 to -12.1 meters, and the silty clay layer from -12.1 to -17.6 meters. The pile diameter of the deep mixing pile is 0.9m, the pile spacing is 1.6m, and the pile length is 14m. The load on the foundation is 85kPa.

[0052] with E s 、c s , Represent the elastic modulus, cohesion and internal friction angle of clay respectively, and E p 、c p , Represent the modulus, cohesion and internal friction angle of the deep-stirred pile, respectively. The soil layer and deep mixing pile parameters in this embodiment are shown in Table 1. The mechanical properties of soft soil and reinforced...

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Abstract

The invention relates to a complex geotechnical engineering reliability analysis device. The device of the present invention includes a central point conversion module, a sampling point generation module, a sampling point rotation module, a finite element analysis module, a reliability calculation module and a process control module; the method of the present invention includes the following steps: a central point conversion step, a sampling point generation Step, sampling point rotation step, finite element analysis step, reliability calculation step and process control step. Compared with the prior art, the improved response surface method proposed by the present invention solves the problem that the old response method is sensitive to the value of the step size and needs to manually adjust the step size during the iterative process, and the negative number appears due to the value of the step size being too large The problem of sampling points provides a theoretical basis for the automatic coupling calculation of reliability analysis and deterministic analysis in complex geotechnical engineering; the invention can greatly reduce the workload of complex geotechnical engineering reliability calculation, and realize complex geotechnical engineering. Degree and deterministic automatic coupling calculation.

Description

technical field [0001] The invention relates to the field of geotechnical engineering, in particular to a reliability analysis device for complicated geotechnical engineering. Background technique [0002] In order to consider the impact of various uncertainties on geotechnical engineering, reliability theory has been widely used in various geotechnical engineering. Geotechnical engineering reliability analysis involves the coupling of geotechnical models and reliability calculations. For complex geotechnical engineering problems, the mechanism of force deformation is quite complex and must be analyzed with the help of commercial software. However, the existing geotechnical engineering software can only perform deterministic analysis, but cannot perform reliability analysis. How to analyze the reliability of complex geotechnical engineering is a technical bottleneck in the field of geotechnical engineering risk analysis. If the Monte Carlo method is used to calculate the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
Inventor 张洁陈宏智马建增
Owner TONGJI UNIV
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