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ABAQUS-based soil foundation liquefaction research method

A soil and foundation technology, applied in soil material testing, seismic signal processing, material inspection products, etc., can solve problems such as the jumping range of binning values

Active Publication Date: 2015-11-11
CEEC JIANGSU ELECTRIC POWER DESIGN INST
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Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies in the prior art, provide a kind of soil foundation liquefaction research method based on ABAQUS, solve the gradation range jumping of the liquefaction influence reduction coefficient of the soil layer in the design of the liquefaction site in the prior art Larger technical issues, and the liquefaction criteria for inclined sites are given

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  • ABAQUS-based soil foundation liquefaction research method
  • ABAQUS-based soil foundation liquefaction research method
  • ABAQUS-based soil foundation liquefaction research method

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[0069] The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

[0070] The research method of soil foundation liquefaction based on ABAQUS includes the following steps:

[0071] Step 1: Secondary development of the Byrne liquefaction model in the ABAQUS software: According to the liquefaction deformation properties of the soil during the earthquake process, combined with the secondary development platform in the ABAQUS software, the Byrne liquefaction model is embedded in the calculation and analysis of ABAQUS to realize the ABAQUS analysis of soil Numerical simulation of solid foundation liquefaction process. The Byrne liquefaction model is simplified on the basis of the Finn liquefaction model, which is based on the Mohr-Coulomb model with the addition of...

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Abstract

The invention discloses an ABAQUS-based soil foundation liquefaction research method which is suitable for the problem of design analysis of liquefaction grounds in civil and hydraulic engineering. The research method is characterized in that 1) numerical simulation in ABAQUS of the soil foundation seismic liquefaction process is realized based on a Byrne liquefaction model and through secondary development of ABAQUS finite element software; 2) for a horizontal ground, a computation formula of liquefaction effect reduction factor continuity is given by utilizing the numerical model and the analysis process above, thereby solving the problem of large jump of "gear" valuing of liquidation effect coefficient of the horizontal ground at present; and 3) for inclined grounds, a correspondence relationship between liquefaction-resistance indexes of the inclined grounds with different inclination angels and excess pore water pressure is given by utilizing the numerical model and the analysis process above. The method states when a liquefaction judgment method in the current standard is applied to the inclined grounds, the liquefaction judgment method needs to be corrected, and a correction method is provided.

Description

technical field [0001] The invention relates to an ABAQUS-based soil foundation liquefaction research method, which belongs to the technical field of water conservancy engineering. Background technique [0002] Building damage caused by soil liquefaction is one of the main forms of earthquake disasters. In previous earthquake disasters, such as the Alaska earthquake in 1964, the Tangshan earthquake in 1976, and the Wenchuan earthquake in 2008, large areas of stratum liquefaction occurred and caused great damage to corresponding buildings. Therefore, the method of judging the liquefaction of soil foundation under earthquake has always been one of the important issues in the design of earthquake resistance and disaster reduction. [0003] At present, the analysis methods for soil liquefaction in relevant domestic design codes are mainly based on empirical analysis methods. The basic framework and data sources are the experience summaries of several earthquakes that occurred i...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/30G01N33/24
Inventor 刘爽卢红前束加庆邹谦冉述远王建荣
Owner CEEC JIANGSU ELECTRIC POWER DESIGN INST
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