Parameter determining device, parameter determining method, and parameter determining program

Patent metadata

Field	Value
Publication number	US-12209998-B2
Application number	US-202017615753-A
Country	US
Kind code	B2
Filing date	May 21, 2020
Priority date	Jun 4, 2019
Publication date	Jan 28, 2025
Grant date	Jan 28, 2025

Abstract

A soil parameter required when civil engineering/mechanical simulations for various grounds are performed is appropriately determined. A parameter determination device determines a parameter of a particle model used in a ground analysis system. The parameter determination device includes a triaxial compression test numerical analysis unit configured to determine the parameter so that the adhesive force and the shear resistance angle of a virtual ground respectively match the adhesive force and the shear resistance angle of an actual ground with a predetermined accuracy, and a pull-out test numerical analysis unit configured to determine the parameter so that a ground reaction force coefficient of the virtual ground matches a ground reaction force coefficient of the actual ground with a predetermined accuracy.

First claim

The invention claimed is:

1. A parameter determination device that determines a parameter of a particle model used in a ground analysis system, the parameter determination device comprising:
a data input unit configured to input a test result of a triaxial compression test performed using a specimen of an actual ground; and
a determination unit configured to:
calculate an adhesive force and a shear resistance angle of the actual ground from the test result,
calculate an adhesive force and a shear resistance angle of a virtual ground from a test result of a triaxial compression test performed using a specimen of the virtual ground in the ground analysis system, and
determine the parameter after the adhesive force and the shear resistance angle of the virtual ground respectively match the adhesive force and the shear resistance angle of the actual ground with a predetermined accuracy, wherein a simulation is performed using the determined parameter.

2. The parameter determination device according to claim 1 , wherein:
the data input unit is configured to input a test result of a pull-out test in which a structure is pulled out from the actual ground; and
the determination unit is configured to:
calculate a ground reaction force coefficient of the actual ground from the test result,
calculate a ground reaction force coefficient of the virtual ground from a test result of a pull-out test performed using the specimen of the virtual ground in the ground analysis system, and
determine the parameter after the ground reaction force coefficient of the virtual ground matches the ground reaction force coefficient of the actual ground with a predetermined accuracy.

3. A parameter determination method of determining a parameter of a particle model used in a ground analysis system, the parameter determination method comprising:
performing, by a parameter determination device:
inputting a test result of a triaxial compression test performed using a specimen of an actual ground; and
calculating an adhesive force and a shear resistance angle of the actual ground from the test result, calculating an adhesive force and a shear resistance angle of a virtual ground from the test result of the triaxial compression test performed using a specimen of the virtual ground in the ground analysis system, and determining the parameter after the adhesive force and the shear resistance angle of the virtual ground respectively match the adhesive force and the shear resistance angle of the actual ground with a predetermined accuracy; and

performing a simulation using the determined parameter.

4. The parameter determination method according to claim 3 , the parameter determination method further comprising:
inputting a test result of a pull-out test in which a structure is pulled out from the actual ground; and
calculating a ground reaction force coefficient of the actual ground from the test result, calculating a ground reaction force coefficient of the virtual ground from a test result of a pull-out test performed using the specimen of the virtual ground in the ground analysis system, and determining the parameter after the ground reaction force coefficient of the virtual ground matches the ground reaction force coefficient of the actual ground with a predetermined accuracy.

Assignees

• Nippon Telegraph & Telephone

Inventors

• Mizunuma Mamoru
• Mineta Shingo
• Oki Shota
• Higashi Yasuhiro
• Oka Soichi
• Tanigaki Kenichi

Classifications

• G01N2203/0058

  Kind of property studied · CPC title

• G01N2203/0019

  Compressive · CPC title

• G01N33/24

  Earth materials (G01N33/42 takes precedence) · CPC title

• G01N3/08 Primary

  by applying steady tensile or compressive forces (G01N3/28 takes precedence) · CPC title

• G01N2203/0256

  Triaxial, i.e. the forces being applied along three normal axes of the specimen · CPC title