A numerical simulation method for dynamic response centrifuge test of pile foundation in liquefaction site is provided

A liquefaction site, numerical simulation technology, applied in electrical digital data processing, computer-aided design, design optimization/simulation, etc., can solve problems such as long preparation period, low adaptability, and few influencing factors

Inactive Publication Date: 2019-01-15
JIANGNAN UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

At present, the types of simulation tests are mainly divided into shaking table tests and centrifuge tests. Although the two types of tests are the most effective means to study this problem, they are time-consuming, costly, have a long preparation period, and have low adaptability. , and there are not many influencing factors that can be considered

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  • A numerical simulation method for dynamic response centrifuge test of pile foundation in liquefaction site is provided
  • A numerical simulation method for dynamic response centrifuge test of pile foundation in liquefaction site is provided
  • A numerical simulation method for dynamic response centrifuge test of pile foundation in liquefaction site is provided

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Embodiment

[0053] The numerical simulation method for the pile foundation dynamic reaction centrifuge test of the liquefaction site provided in this embodiment includes the following steps:

[0054] (1) Obtain the experimental data of the pile foundation dynamic reaction centrifuge in the liquefaction site;

[0055] (2) Based on the OpenSees platform, the overall finite element model of pile-soil interaction is established according to the size of the centrifuge test in the literature in step (1), such as Figure 4~5 Shown:

[0056] S1, establish the finite element model of the sandy soil layer in the centrifuge test of matching step (1), and divide the finite element model of the sandy soil layer into several sandy soil solid elements 4, specifically comprising the following steps:

[0057] S11. Introducing OpenSees embedded two-dimensional four-node elements with soil-water coupling properties that can consider pore pressure dissipation and redistribution and associated with pore pres...

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Abstract

A method for numerically simulating the dynamic response centrifuge test of pile foundation in liquefaction site includes such steps as setting up correct sand-soil solid element model to correctly simulate the experiment environment, and setting up pile-soil dynamic response centrifuge. In the finite element model of soil-soil interaction, the beam element is introduced to simulate the length andthe bar element to simulate the volume. A spring element is added to the soil action node to characterize the pile. At last, the centrifuge test of dynamic response of pile foundation in liquefactionsite is simulated accurately by using proper boundary condition and seismic wave loading method. The centrifuge test numerical simulation method of the invention simplifies the modeling step, improves the calculation efficiency, guarantees the calculation precision, and solves the problem of pile. The analysis of soil-soil interaction is a difficult problem, so it has a wide application prospect.

Description

technical field [0001] The invention relates to a test numerical simulation method of a pile foundation dynamic reaction centrifuge in a liquefaction site. Background technique [0002] Earthquake disaster, as one of the most destructive natural disasters, has always been the most important thing in the design of building structures. Among them, the pile foundation of the bridge structure has the most obvious response to the earthquake. Previous earthquake damages have shown that the deformation and expansion of the sand and soil around the pile foundation caused by the earthquake caused the most serious damage to the bridge pile foundation. The most common form of harm. Practice and research show that the liquefied soil with large lateral deformation under the earthquake significantly affects the mechanical behavior of the bridge pile foundation, resulting in a significant increase in the soil pressure on the pile side, which can easily cause serious damage to the pile fou...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/23G06F2119/06
Inventor 卜亚松贡浩周太全
Owner JIANGNAN UNIV
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