In order to study the influence of mainshock-aftershock sequences on dynamic response of high-rise shear wall structures,the dynamic elastoplastic analysis model of a super high-rise shear wall structure was established as the research object,and relevant research was carried out.Ten real mainshock-aftershock sequences were selected,and 14 mainshock-aftershock sequences were constructed as input seismic loads,PGA,PGV,PGA/PGV and other measures were used as indicators to characterize the intensity of ground motion,the structural plastic energy dissipation,the incremental damage ratio of the maximum residual inter-story displacement angle and the Karl Pearson correlation coefficient under the action of the mainshock-aftershock sequence and only the mainshock were calculated.The characteristics of the structural plastic energy dissipation and the maximum residual inter-story displacement angle under the action of the mainshock-aftershock sequence and the correlation between the ground motion intensity index and the incremental damage ratio were analyzed.The results show that the mainshock-aftershock sequence aggravates the structural damage,and the plastic energy consumption increases by 24%～28%on average.Under the action of the mainshock-aftershock sequence,the maximum residual inter-story drift ratio of the structure may increase or decrease.The incremental damage ratio of structural mainshock-aftershock based on plastic energy dissipation shows a strong correlation with the ground motion intensity characterization indexes related to PGV,SED and SI,which can be considered as an index for selecting and adjusting the seismic waves of mainshock-aftershock sequences.The incremental damage ratio of the mainshock-aftershock of the structure based on the maximum residual inter-story drift ratio is weakly correlated with the ground motion intensity index.
high-rise shear wall structuredynamic responsemainshock-aftershock sequenceplastic energy dissipationresidual inter-story drift ratio
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