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Fitting method for seabed near-fault seismic oscillation

A ground motion and fault technology, applied in seismology, seismic signal recording, seismic signal processing, etc., can solve problems such as being unable to see

Active Publication Date: 2020-02-14
FUZHOU UNIV
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Problems solved by technology

On the other hand, there are still few seabed near-fault earthquake records, which cannot meet the current needs of marine engineering seismic analysis.
[0006] At present, there is no fitting method suitable for seabed near-fault ground motions. Therefore, it is urgent to propose a fitting method suitable for seabed near-fault ground motions, so as to provide suitable ground motion input for the seismic analysis of cross-sea structures, so as to improve the Seismic safety of sea-crossing structures near fault attachments

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  • Fitting method for seabed near-fault seismic oscillation

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[0146] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0147] It should be pointed out that the following detailed description is exemplary and intended to provide further explanation to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0148] It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combinatio...

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Abstract

The invention relates to a fitting method for seabed near-fault seismic oscillation. The fitting method comprises the following steps: S1, calculating a seismic oscillation transfer function of an offshore site; S2, fitting high-frequency components of seabed seismic oscillation to obtain high-frequency acceleration time-history components of near-sea area near-fault seismic oscillation; S3, fitting low-frequency pulse components of the seabed seismic oscillation to obtain a low-frequency pulse type acceleration time history of the seismic oscillation; and S4, superposing the high-frequency acceleration time-history components with the translated low-frequency pulse type acceleration time history to obtain seabed near-fault seismic oscillation. According to the method, the bottleneck of lack of seismic oscillation records in existing cross-sea structure seismic analysis can be practically solved; the accurate and reasonable seismic oscillation input is provided for seismic performanceanalysis of the seabed near-fault structure; and the anti-seismic performance evaluation of the ocean structure can be promoted and improved.

Description

technical field [0001] The invention relates to the field of near-fault ground motion evaluation, in particular to a fitting method of seabed near-fault ground motion. Background technique [0002] The research on the characteristics of near-fault ground motions shows that near-fault ground motions have two notable features different from far-field ground motions: one is that the velocity time history contains pulses with long periods and large peaks; the other is that the displacement time history may contain permanent ground motions. Step-type pulse caused by displacement. As a result, structures located near faults experience more severe seismic damage. [0003] Since the existing near-fault ground motion records are very limited, in order to solve the problem of very limited near-fault ground motion records, relevant scholars proposed a fitting method for near-fault ground motions. The impulse components of the components are superimposed. The emergence of the above-m...

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Application Information

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IPC IPC(8): G01V1/38G01V1/30G01V1/24
CPCG01V1/24G01V1/307G01V1/38
Inventor 张超卢建斌
Owner FUZHOU UNIV
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