本研究は，下部構造の2 次モードにより励起される屋根構造の逆対称1 波モードを考慮した中大規模ラチスドームの等価静的地震荷重を提案する検討のその2です。論文はこちら
A series of modal response spectrum analyses were performed on 60m to 150m spanned lattice domes with the half subtended angle ranging from 20 deg. to 30 deg. to investigate the effect of the dynamic characteristics of the substructure’s higher mode. It was found that the current equivalent static seismic loads underestimate the roof response when supported by multi-story substructure with the 1st natural period in the range of 0.5s to 1.2s. Therefore, a modified equivalent static seismic load considering the antisymmetric roof mode’s amplification by the substructure’s second mode was proposed and validated.