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A pile foundation dynamic reaction centrifuge test numerical simulation method

A numerical simulation and centrifuge technology, applied in the direction of electrical digital data processing, computer-aided design, special data processing applications, etc., can solve the problems of few influencing factors, cost of money, low adaptability, etc., and achieve the effect of solving difficult analysis problems

Inactive Publication Date: 2019-01-18
JIANGNAN UNIV
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  • Abstract
  • Description
  • 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

Method used

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  • A pile foundation dynamic reaction centrifuge test numerical simulation method
  • A pile foundation dynamic reaction centrifuge test numerical simulation method
  • A pile foundation dynamic reaction centrifuge test numerical simulation method

Examples

Experimental program
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Embodiment

[0053] The pile foundation dynamic reaction centrifuge test numerical simulation method 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 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 pressures as the sand solid element in ...

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Abstract

The invention discloses a pile foundation dynamic reaction centrifuge test numerical simulation method. An experiment environment is correctly simulated by establishing a correct sand soil solid element model. When the finite element model of soil-pile interaction is established, two-dimensional four-node solid pile element is introduced and the constitutive model of pile material is the same as that of the experiment. A spring element is added to the pile-soil action node to characterize the pile-soil dynamic reaction. Finally, the centrifuge test of the dynamic response of the pile foundation in the actual liquefaction site is restored as much as possible by adopting the appropriate boundary conditions and seismic wave loading mode, so that the simulation method can effectively predict the reaction of the free field, single pile and pile group under the dynamic condition. The method simplifies the modeling step, improves the calculation efficiency, ensures the calculation accuracy, and solves the problem that the analysis of soil-soil interaction is a difficult, 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. 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 foundation, and then coupl...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/13G06F30/23G06F2119/06
Inventor 卜亚松贡浩周太全
Owner JIANGNAN UNIV
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