A Seismic Wave Selection Method Based on Conditional Mean Input Energy Spectrum

Abstract

The invention belongs to the technical field of seismic wave information processing, and discloses a seismic wave selection method based on a conditional mean input energy spectrum, which establishes a conditional mean input energy spectrum under a set earthquake: calculates the average input energy spectrum under a set earthquake; establishes an input energy correlation Relational model; determining the natural period T * The corresponding standard variance multiple parameter ε(T * ); calculate the seismic input energy spectrum values ​​under other periods, and establish the conditional mean input energy spectrum under the set earthquake; select seismic waves: determine the data of the set earthquake, and select records that meet the conditions in the database; determine the standard deviation of the input energy spectrum Multiple parameter ε(T * ) setting range; perform amplitude modulation on seismic waves; sort seismic waves according to the mean square error value, and select the front row seismic waves. The invention can well reflect the three elements of earthquake amplitude, frequency spectrum and duration, especially the accumulative damage produced in the non-elastic response of the structure during the earthquake duration has been fully considered.

Description

technical field [0001] The invention belongs to the technical field of seismic wave information processing, in particular to a seismic wave selection method based on conditional mean value input energy spectrum. Background technique [0002] At present, the closest existing technology: my country's GB50011-2010 "Code for Seismic Design of Buildings" requires elastic-plastic deformation checks for buildings with heights exceeding the limit and irregular planes or verticals to check their performance under rare earthquakes. Whether the interstory drift angle meets the limit value requirements of the elastic-plastic interstory drift angle in the code. Therefore, an elastic-plastic time-history analysis of the structure is required. Elastoplastic time-history analysis is an effective method to predict the seismic response of structures and evaluate the seismic performance of structures, and has been adopted in relevant design codes in many countries. Its content includes: the e...

AI Technical Summary

Problems solved by technology

The acceleration response spectrum cannot reflect the three major characteristics of the ground motion. Since the three major characteristics have a great influence on the structural response, when the selected seismic wave is used for structural analysis of the structure, the calculated damage will have a certain deviation.

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