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A Fitting Method of Submarine Near-Fault Earthquake Motion

A technology of ground motions and faults, applied in seismology, seismic signal processing, seismic signal recording, etc.

Active Publication Date: 2021-03-02
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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  • A Fitting Method of Submarine Near-Fault Earthquake Motion

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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 present invention relates to a fitting method of seabed near-fault ground motion, comprising the following steps: step S1: calculating the ground motion transfer function of offshore sites; step S2: fitting the high-frequency components of seabed ground motion to obtain near-sea area near-fault earthquakes The high-frequency acceleration time-history component of the motion; step S3: fitting the low-frequency pulse component of the seabed ground motion to obtain the low-frequency pulse-shaped acceleration time-history of the ground motion; step S4: combining the high-frequency acceleration time-history component with the translated low-frequency pulse-shaped Acceleration time histories are superimposed to obtain seafloor near-fault ground motions. The present invention can effectively solve the bottleneck of lack of seismic records in the current seismic analysis of cross-sea structures, provide more accurate and reasonable seismic input for the seismic performance analysis of submarine near-fault structures, and help to promote and improve the seismic performance evaluation of marine structures .

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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V1/38G01V1/30G01V1/24
CPCG01V1/24G01V1/307G01V1/38
Inventor 张超卢建斌
Owner FUZHOU UNIV
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