Correction: Fujii, K. Bidirectional Seismic Energy Input to an Isotropic Nonlinear One-Mass Two-Degree-of-Freedom System. Buildings 2021, 11, 143

Kenji Fujii

doi:10.3390/buildings12030358

Department of Architecture, Faculty of Creative Engineering, Chiba Institute of Technology, Chiba 275-0016, Japan

Buildings2022, 12(3), 358;https://doi.org/10.3390/buildings12030358

There was an error in the original publication []. Two equations in Appendix A (Equations (A11) and (A12)) are incorrect.

A correction has been made to Appendix A:

\hat{e_{I, B I}} = - \frac{1}{2} {\dot{d} {(t)}^{T} a_{g} (t) + {\dot{d}}^{*} {(t)}^{T} a_{g}^{*} (t)},

(A11)

{\begin{cases} \dot{d} (t) = - \sum_{n = - N}^{N} {\begin{matrix} c_{X, n} \\ c_{Y, n} \end{matrix}} H_{V} (i ω_{n}) \exp (i ω_{n} t) \\ {\dot{d}}^{*} (t) = i \sum_{n = - N}^{N} {\begin{matrix} c_{X, n} \\ c_{Y, n} \end{matrix}} H_{V} (i ω_{n}) sgn (ω_{n}) \exp (i ω_{n} t) \end{cases},

(A12)

The author apologizes for any inconvenience caused and state that the scientific conclusions are unaffected. The original publication has also been updated.

Reference

Fujii, K. Bidirectional seismic energy input to an isotropic nonlinear one-mass two-degree-of-freedom system. Buildings 2021, 11, 143. [Google Scholar] [CrossRef]

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Correction: Fujii, K. Bidirectional Seismic Energy Input to an Isotropic Nonlinear One-Mass Two-Degree-of-Freedom System. Buildings 2021, 11, 143

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