In this study, we focused on the PLA (Phase Lag Angle) of load vector and displacement vector which shows the magnitude of bi-directional plastic deformation and examined relationship with seismic response. First, static incremental displacement analysis of circular pass and square pass was performed using both MSS (Multiple Shear Spring) model and fiber model of RC column, and basic characteristics of PLA were investigated. Subsequently, static displacement incremental analysis of displacement pass using the elliptically component of polarization was performed for MSS model and fiber model of RC column. As a result, fiber model shows a tendency to increase PLA more than MSS model. Furthermore, seismic response analysis was performed on MSS model and fiber model with bi-directional ground motion using elliptical component of polarization as input. As a result, seismic response also increased in dynamic analysis, and same tendency as result in incremental displacement analysis was obtained.

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[in Japanese]

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 The following article has been retracted at the authors' request, because of potential problems with the data at temporary observation stations used in the manuscript.
 Atsushi NOZU, Yosuke NAGASAKA: PRELIMINARY ANALYSIS OF NEAR-SOURCE STRONG MOTION RECORDS DURING THE MAIN SHOCK OF THE 2016 KUMAMOTO EARTHQUAKE —CAUSE OF DAMAGING GROUND MOTIONS IN MASHIKI—, Journal of Japan Society of Civil Engineers, Ser. A1 (Structural Engineering & Earthquake Engineering (SE/EE)), Vol. 73, No. 4 (JSCE Journal of Earthquake Engineering, Vol. 36), pp. I_959-I_969, 2017.

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