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. The method comprises the steps of: establishing a conditional mean input energy spectrum under a set earthquake: calculating an average input energy spectrum under the set earthquake; establishing an input energy correlation relation model; determining a standard deviation multiple parameter [epsilon ](T*) corresponding to a natural vibration period T*; calculating the seismic input energy spectrum values under other periods, and establishing the conditional mean input energy spectrum under the set earthquake; selecting seismic waves: determining the data of the set earthquake, selecting out the records in a database that satisfy a condition; determining the setting range of the input power spectrum standard deviation multiple parameter [epsilon ] (T*); modulating the amplitudes of the seismic waves; sortingthe seismic waves according to a mean square error, and selecting out the front seismic waves. The method can well reflect the three elements including the amplitude, the spectrum and the duration ofthe earthquake, and especially takes full account of the cumulative damage caused by the duration of the earthquake to the inelastic reaction of the structure.

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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