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This paper summarizes how the effective length factors of long columns in atrium are calculated based on previous papers. First, 1) proposed evaluation methods for the effective length factors when the frame buckles with non-sway mode are described, and numerical examples are shown. Secondary, 2) proposed evaluation methods when the frame buckles with sway mode and examples are shown. In summary, the accuracy and characteristics of each method are shown.
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TSUDA et al. (2026) studied this question.
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