Building Response Records during the 2011 Tohoku Earthquake and Their Implications for Seismic Desig

• 作 者: KazuhikoKasai;
• 机 构: Structural Engineering Research Center, Tokyo Institute of Technology, Japan
• 出 处: 第九届全国随机振动理论与应用学术会议暨第三届全国随机动力学学术会议
• 发表日期: 2014年期

　　Many tall buildings in Tokyo metropolitan area were strongly shaken during the Tohoku Earthquake, March 11, 2011.Most of them are less than 40 years old, and experienced the shaking of such a strong level for the first time, although they suffered little damage.The buildings are conventional seismically-resistant buildings, and those constructed after the 1995 Kobe Earthquake are typically supplementally-damped buildings or base-isolated buildings for seismic damage reduction.Some of the tall buildings are instrumented with sensors and their motions recorded during the event.This paper discusses recorded responses of such tall buildings in Tokyo employing the three distinct structural systems.By estimating contributions of multiple vibration modes, various shaking phenomena observed in the tall building are clarified.Characteristics of the distinct systems and their effects on building contents are contrasted based on mode-based analyses.