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Collapse Strength Ratios for Structures Under Mainshock-aftershock Subduction Seismic Sequences by Jorge Ruiz-García; José M. Ramos-Cruz is a Engineering article available to read on EtoBox.

What is Collapse Strength Ratios for Structures Under Mainshock-aftershock Subduction Seismic Sequences about?

The effects of aftershocks on civil structures have called the attention of the earthquake engineering community mainly in the last two decades. However, neither seismic design codes nor seismic assessment guidelines for existing structures worldwide consider the possible detrimental effects of strong aftershocks nowadays. From this aim, this paper presents the results of a statistical study focused on computing the relative lateral strength to avoid collapse, named lateral strength ratio Rc , of degrading (i.e., having stiffness and in-cycle strength degradation) single-degree-of-freedom, SDOF, systems under mainshock-aftershock seismic sequences. For this purpose, the degrading SDOF systems have a trilinear force–displacement backbone mainly defined by their displacement ductility capacity, μ c , and the negative slope after peak strength, α c . Therefore, median Rc ratios were computed for a site-specific mainshock-aftershock scenario at rock sites considering as-recorded and artificial seismic sequences. From the results of this investigation, it is shown that median Rc ratios that take into account strong aftershocks are smaller than those computed for only the mainshocks, whi

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Author

Jorge Ruiz-García; José M. Ramos-Cruz

Publisher

Elsevier BV

Published

2023

Language

EN

Field

Engineering (Physical Sciences)