Ground motion selection method based on anti-earthquake specifications

Abstract

The invention relates to the technical field of anti-earthquake design and evaluation, and specifically relates to a ground motion selection method based on anti-earthquake specifications. The groundmotion selection method comprises the steps of firstly performing preliminary selection according to earthquake environment characteristics of the design site, selecting earthquake ground records which conform to the earthquake environment characteristics of the site, and then carrying a following matching step, thereby being capable of effectively controlling earthquake engineering characteristics of the earthquake ground motion; then controlling the spectrum shape of a response spectrum through the variance by means of selecting key points the variance so as to achieve the purpose of overall spectrum shape matching of the response spectrum; and finally selecting a group of required ground motion records through precisely matching characteristic period points of a specification responsespectrum. The ground motion records selected according to the ground motion selection method based on the anti-earthquake specifications can enable the average response spectrum of the selection ground motion to reach consistency with the specification response spectrum in a statistical sense, and can control the spectrum shape of the response spectrum. In addition, the ground motion can keep earthquake engineering characteristics of the natural ground motion, so that the ground motion selection method is applicable to the anti-earthquake design and evaluation.

Description

technical field [0001] The invention relates to the technical field of seismic design and evaluation, in particular to a seismic motion selection method based on seismic codes. Background technique [0002] The selection of ground motion input in time history analysis has been a concern since the time history analysis method was proposed. Reasonable ground motion input is a necessary prerequisite for structural dynamic time history analysis. Scholars from various countries have conducted a lot of research on the selection of ground motion input in time history analysis, and proposed a variety of wave selection methods, such as "Anti-Regulations", "High Regulations", ASCE 7-10 normative methods, Yang Bo and Li Yingmin's double Methods such as the frequency band method and the FEMA P695 specification method. [0003] The "Anti-Resistance Regulations" and "High Regulations" require that the ground motion be selected according to the category of the building site and the design...

AI Technical Summary

Problems solved by technology

If the variance control is used in the full cycle range of the response spectrum, the specified variance limit must be very large to meet the requirements. If the variance limit is too large, the control effect will not be achieved in essence.

However, the variance control is only implemented around the first period T1 of the structure, not only attached to the first period of the structure, but also does not control over the entire response spectrum

[0006] Although there are many methods for selecting ground motion input in the prior art, each method has corresponding shortcomings, and there may be problems that the ground motion that meets the requirements cannot be selected or the selected ground motion is not accurate.

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