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Underground structure anti-seismic modeling method based on viscoelastic constitutive relation

A technology of underground structure and constitutive relationship, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve the problems of experimental performance reflecting soil dynamic characteristics, achieve high repeatability, improve efficiency and accuracy , the effect of low error rate

Pending Publication Date: 2020-11-06
CHANGAN UNIV
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Problems solved by technology

Currently, the Mohr-Coulomb soil constitutive used in the dynamic model is not the dynamic constitutive, and the dynamic model represented by the D-P material constitutive cannot fully combine the experimental performance of the soil to reflect the dynamic characteristics of the soil.

Method used

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  • Underground structure anti-seismic modeling method based on viscoelastic constitutive relation
  • Underground structure anti-seismic modeling method based on viscoelastic constitutive relation
  • Underground structure anti-seismic modeling method based on viscoelastic constitutive relation

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Embodiment Construction

[0028] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0029] Such as figure 1 As shown, the present invention provides a viscoelastic constitutive underground seismic modeling method. Firstly, the calculation integral model of the underground structure is determined, and the Rayleigh damping coefficient of the structure is calculated according to the structural parameters in the calculation integral model. Determine and calculate the spring coefficient and damping coefficient in the three directions of the overall model. Since the underground structure often has multiple contacts, the ground stress balance is difficult. It is necessary to first use static calculation to obtain a preliminary settlement value of the underground structure, and then Use it as the initial value of the ground stress balance to carry out the initial ground stress balance, and then continuously reduce the initial value of...

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Abstract

The invention discloses an underground structure anti-seismic modeling method based on a viscoelastic constitutive relation. The method comprises the following steps: step 1, determining an overall calculation model, and determining spring coefficients and damping coefficients in an X direction, a Y direction and a Z direction in the overall calculation model based on a viscoelastic boundary formula; step 2, determining the crustal stress balance of the overall calculation model, and iterating the crustal stress balance of the overall calculation model until the crustal stress balance meets engineering requirements; step 3, converting a static boundary during crustal stress balance into a dynamic boundary for seismic oscillation calculation; step 4, judging the bottom boundary condition ofthe overall calculation model, and inputting corresponding seismic power data; step 5, applying viscoelastic artificial boundaries to the periphery of the overall calculation model; and step 6, calling power parameters of different soil body units in the overall calculation model to perform iterative calculation, and determining parameters of earthquake dynamic response calculation. Anti-seismicmodeling is carried out on the basis of the viscoelastic constitutive model, and the method is clear in overall operation thought, high in repeatability and low in error rate.

Description

technical field [0001] The invention belongs to the field of underground anti-seismic, in particular to an anti-seismic modeling method for underground structures based on viscoelastic constitutive relations. Background technique [0002] At present, the seismic safety evaluation of different underground structures is a hot topic in the research of underground structures. Compared with the problems of boundary effects, similarity coefficients and detection accuracy caused by traditional dynamic model tests, the numerical dynamic model method can maximize the Reduce errors caused by field tests. At the same time, with the improvement of computer performance and the improvement of calculation theory, the increasingly reliable numerical dynamic model method has become the best method to further verify and expand the reliability and applicability of model test conclusions. Therefore, the means and level of seismic modeling of underground structures directly promote the developm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/13G06F30/23G06F119/14
CPCG06F30/23G06F30/13G06F2119/14
Inventor 王志超杨桃苏旭林赖金星邱军领施王帅胤李瑶
Owner CHANGAN UNIV
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