Method for calculating site response in earthquake by considering medium quality factor
A technology of quality factor and calculation method, applied in seismology, seismic signal processing, geophysical measurement, etc.
Inactive Publication Date: 2019-01-11
LIAONING TECHNICAL UNIVERSITY
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[0004] Aiming at the problems existing in the prior art, the present invention provides a method for calculating the site response in an earthquake considering the medium quality factor, and studies the influence of the existing spectral ratio method on the calculation of the site response by ignoring the quality factor of the seismic wave propagation medium and how to obtain the medium quality factor , improve the existing spectral ratio method, propose a site response calculation method considering the quality factor of the medium, fully consider the influence of the quality factor on seismic wave propagation, and make the Pubi method applicable to similar geological structures, research sites and reference site seismic source distances Provide accurate basis for geological and other engineering site selection in any situation
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[0030]In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. The specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0031] A method for calculating the site response during an earthquake considering the medium quality factor, the process is as follows figure 1 As shown, it specifically includes the following steps:
[0032] In this example, the earthquake in a certain place in 2008 is selected as the research object. The place is located in the CD plain, and the CD plain is an alluvial plain located in the west of the SC Basin in my country. The geological structure in the plain is similar, including CD, DY, MY, and YA , LS, MS and other regions, with a total area of 18,810 square kilometers. The distribution of seismic stations...
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The invention provides a method for calculating a site response in an earthquake by considering a medium quality factor, and relates to the technical field of earthquake engineering and geotechnical engineering. The method comprises the following steps of selecting a research area with a similar structure, and collecting horizontal seismic records of all bedrock sites; obtaining east-west and south-north Fourier amplitude spectrums of the bedrock sites; calculating east-west and south-north quality factors of every two bedrock sites; obtaining the medium quality factor with a form such as Q(f)=Q0fn; and calculating the horizontal site response of the research site in the earthquake. According to the method for calculating the site response in the earthquake by considering the medium quality factor, provided by the invention, the absorptive attenuation effect of the quality factors on earthquake waves is considered; when a hypocentral distance of a reference site and a hypocentral distance of the research site have relatively large difference, an improved spectral ratio method can evaluate the site response more accurately; a powerful basis is provided for engineering site selection; and the damage to the engineering caused by poor site geological conditions in the earthquake is reduced.
Description
technical field [0001] The invention relates to the technical fields of earthquake engineering and geotechnical engineering, in particular to a method for calculating site response in earthquakes considering medium quality factor. Background technique [0002] Many earthquakes that have occurred have shown that unfavorable site conditions will lead to aggravated earthquake damage. It can be seen that the local geological conditions of the project site have a significant effect on the amplification of earthquake motion. At present, the most commonly used method for estimating the amplification effect of engineering sites on ground motion is the spectral ratio method. The principle of the spectral ratio method is: assuming that the seismic response of the bedrock site is constant, and taking the bedrock site as the reference field, comparing the ground motion of the engineering site under study with the ground motion of the reference field can obtain the site response of the e...
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IPC IPC(8): G01V1/30
CPCG01V1/306G01V2210/62
Inventor 李启成何书耕郭雷闵也
Owner LIAONING TECHNICAL UNIVERSITY
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