Method and device for getting earthquake motion samples

A ground motion and sample technology, applied in the direction of seismic signal processing, etc., can solve the problem of cumbersome parameter estimation of ground motion

Active Publication Date: 2014-07-30
CHINA EARTHQUAKE DISASTER PREVENTION CENT
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  • Abstract
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  • Claims
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Problems solved by technology

However, in this process, a very tedious parameter estimation of the original ground motion is required

Method used

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  • Method and device for getting earthquake motion samples
  • Method and device for getting earthquake motion samples
  • Method and device for getting earthquake motion samples

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Embodiment Construction

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0028] Embodiments of the present invention provide a method for obtaining ground motion samples, such as figure 1 shown, including:

[0029] 101. Obtain the instantaneous amplitude and instantaneous phase of the pre-stored natural ground motion records.

[0030] The pre-stored natural ground motion records refer to natural ground motion records that have similar seismic environment and site conditions to the site where the engineering structure to be subjected to...

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Abstract

The embodiment of the invention provides a method and a device for getting earthquake motion samples and relates to the field of earthquake engineering. According to the method and the device, the earthquake motion samples having the same non-stationary property as natural earthquake motion can be obtained. The method comprises the following steps: getting instantaneous amplitudes and instantaneous phases of natural earthquake motion records which are pre-stored; uncoiling the instantaneous phases; adopting Fourier transform to get an amplitude spectrum and a phase spectrum of the instantaneous phases after uncoiling; adopting a high-frequency component of the phase spectrum to construct a random frequency process; adopting the random frequency process, the amplitude spectrum and a low-frequency component of the phase spectrum to construct a random phase process; getting an earthquake motion random process according to the instantaneous amplitudes and the random phase process; and getting the earthquake motion samples according to the earthquake motion random process. The method and the device, disclosed by the invention, can be used in the field of earthquake-proof design.

Description

technical field [0001] The invention relates to the field of earthquake engineering, in particular to a method and a device for obtaining earthquake motion samples. Background technique [0002] The seismic design of important engineering structures, such as super high-rise buildings, nuclear power plants, offshore platforms, long-span bridges, large dams, and liquid storage tanks, requires dynamic time-history analysis to determine the full dynamic response of engineering structures under possible earthquakes. process, and then achieve the goal of seismic fortification. Dynamic time-history analysis requires a certain number of ground motion acceleration time histories that meet certain seismic environments and site conditions as the input for structural dynamic response analysis. However, the number of natural strong earthquake observation records is very limited and cannot meet the various needs of actual engineering. Therefore, it is necessary to use numerical methods t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V1/28
Inventor 张郁山
Owner CHINA EARTHQUAKE DISASTER PREVENTION CENT
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