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Seismic capacity assessment of postmainshock damaged containment structures using nonlinear incremental dynamic analysis
Author(s) -
Bao Xu,
Zhai ChangHai,
Zhang MaoHua,
Xu LongJun
Publication year - 2020
Publication title -
the structural design of tall and special buildings
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.895
H-Index - 43
eISSN - 1541-7808
pISSN - 1541-7794
DOI - 10.1002/tal.1706
Subject(s) - fragility , incremental dynamic analysis , containment (computer programming) , nonlinear system , structural engineering , limit state design , aftershock , geology , seismic analysis , computer science , seismology , engineering , physics , quantum mechanics , programming language , thermodynamics
Summary This paper investigates the structural performance and seismic capacity of the postmainshock damaged containment structure through the incremental dynamic analysis (IDA). To evaluate the seismic capacity with minimum uncertainty, the damage measure (DM) and intensity measure (IM) for IDA curves are selected in term of the coefficient of variation. The IDA using mainshock records is implemented to examine the seismic damage process of a containment structure and determine key damage states. The static cyclic loading analysis and aftershock IDA are also conducted on mainshock‐damaged containment structures to investigate the effect of initial damage states on the dynamic characteristics of structures. Finally, based on IDA results, limit states of a containment structure are defined using a generalized multidimensional limit‐state function that allows considering the dependence between the mainshock‐damaged level and residual seismic capacity. These proposed bidimensional limit‐state functions can be used in the fragility analysis and risk assessment of containment structures under mainshock–aftershock, which can improve the accuracy of seismic assessment.