Earticle

초록

영어

Focusing on Japan’s three major metropolitan regions – Tokyo, Osaka and Yokohama – this paper examines the evolution of earthquake disaster preparedness with particular emphasis on high-rise buildings and their performance under longperiod ground motions. The 2011 Tohoku Earthquake, also widely known as Great East Japan Earthquake (GEJE), revealed critical vulnerabilities in tall structures, especially their susceptibility to prolonged, low-frequency seismic waves that induce large-amplitude, long-duration swaying, and their location in highly dense regions. In response, Japan has advanced both policy and engineering approaches, shifting from a reactive “pull-type” emergency response system to a proactive “push-type” model that pre-positions critical resources. Concurrently, structural design codes and retrofit strategies for high-rise buildings have been significantly enhanced to address long-period seismic effects. This study analyses and discusses representative skyscrapers, including Abeno Harukas and the Cosmo Tower in Osaka, Yokohama Landmark Tower in Yokohama, and major developments in Tokyo such as Azabudai Hills Mori JP Tower, the Toranomon Hills complex, from which 2 were built prior to the event with 3 having their construction completed after the event with design re-evaluations explicitly benchmarked against GEJE ground motion characteristics; Torch Tower currently under construction as the tallest building in Japan upon its completion, and the Tokyo Skytree, which experienced the GEJE during its construction phase, in terms of key structural and technological measures, including tuned mass dampers, seismic control system, base isolation, and energy-dissipating devices designed to mitigate resonance and reduce occupant discomfort and structural damage during extended ground motion. In addition, the study considers the integration of non-structural seismic resilience features, such as emergency shelter capacity, independent energy systems, and redundant communication infrastructure. Given the increasing probability of future mega-earthquakes along the Chishima Trench and Nankai Trough, this paper highlights the necessity of integrating advanced seismic design with comprehensive urban disaster preparedness. It argues that high-rise buildings must function not only as structurally resilient systems, but also as critical nodes of urban continuity in the aftermath of large-scale seismic events.

저자

• Anete Skrastina [ Korea University ]
• Young-Soo Yoon [ Korea University ]

참고문헌

발행기관

간행물

표지보기 관심저널 등록

• 간행물명

  한국재난정보학회 학술발표대회

• 간기

  부정기

• 수록기간

  2005~2026

• 십진분류

  KDC 338 DDC 361