Simulation method for parameter spatial variability of concrete gravity dam material

A technology of spatial variability and material parameters, applied in the field of simulation, can solve problems such as differences in material parameters of adjacent grid units and no consideration of spatial correlation

Active Publication Date: 2018-10-09
SICHUAN UNIV
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Problems solved by technology

Current simulation methods do not take this spatial correlation into account, leading to unreasonable situations where the material parameters of adjacent grid cells differ greatly

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  • Simulation method for parameter spatial variability of concrete gravity dam material
  • Simulation method for parameter spatial variability of concrete gravity dam material
  • Simulation method for parameter spatial variability of concrete gravity dam material

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Embodiment Construction

[0021] In order to make the purpose of the present invention, technical solutions and advantages clearer, the following technical solutions in the present invention are clearly and completely described. Obviously, the described embodiments are some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative work all belong to the protection scope of the present invention.

[0022] Such as figure 1 As shown, a method for simulating the spatial variability of concrete gravity dam material parameters includes the following steps:

[0023] 1. The section size of a certain gravity dam model is as follows: figure 2 As shown, the dam height is 150m, the dam bottom width is 130m, the slope ratio of the upstream dam surface is 1:0.2, and the slope ratio of the downstream dam is 1:0.8. It is known that the tensile strength follows a logarith...

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Abstract

The invention provides a simulation method for parameter spatial variability of a concrete gravity dam material. The method comprises the following steps that a gravity dam model is established and subjected to grid division, a number and shape center coordinates of each grid unit are acquired, and a matrix En*3 is formed; MATLAB software is used for generating a random matrix Am*n; a self-correlation function is used for calculating a correlation coefficient matrix rhon*n of the matrix En*3; the matrix rhon*n is subjected to Cholesky decomposition, and an upper triangular matrix Bn*n is obtained; the matrix Bn*n is used for conducting linear transformation on the matrix Am*n to obtain a matrix Dm*n; the matrix Dm*n is calculated to obtain a related random field Xm*n. The simulation methodbetter accords with engineering practice, and the more accurate data support can be provided for safe running of a gravity dam in the later result.

Description

technical field [0001] The invention belongs to the field of simulation methods, in particular to a simulation method for the spatial variability of concrete gravity dam material parameters. Background technique [0002] Concrete gravity dam is a commonly used type of dam in water conservancy and hydropower projects. Concrete is a heterogeneous material made by mixing sand and gravel aggregates with cement slurry. In the process of constructing a concrete gravity dam, the concrete is generally poured in sections and blocks. Due to the large surface of the pouring chamber, uneven pouring construction quality, and the heterogeneity of the concrete material itself, the physical and mechanical properties of the concrete material have spatial variability, that is, for the same type of concrete, its physical and mechanical properties at different positions on the dam body The parameters are different. The spatial variability of concrete material parameters will affect the stres...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/13G06F30/23
Inventor 吴震宇卢祥陈建康李艳玲裴亮张瀚
Owner SICHUAN UNIV
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