Collapse Analysis of Structures under Heavy Earthquake and Method for Evaluating the Performance

阪神-浅路大地震的破坏给结构工程研究人员带来了最大的冲击。阪神-浅路大地震中最大的地震运动是当时规范中提供的地震运动的1.5倍。在日本，结构的强度是弹性结构的1/4到1/2倍。结构的塑性变形能力可以抵抗超过结构本身强度的地震力。然而，在结构设计中进行了简单的计算，而没有考虑结构在超过结构强度的地震力作用下的性能。本课题的研究目的是建立揭示动态倒塌过程的方法，并开发其在结构设计中的应用。本研究项目于1997年至1999年进行。我们使用的工作站是通过互联网在京都大学建立的，并将地震运动和结构放在一起。然后由研究人员得出的结果向公众公开。输入和输出数据相互使用，并进行了频繁的综合讨论。

Damages of the Great Hanshin-Awaji Earthquake gave researchers in structural engineering largest shocks. The largest earthquake motion in The Great Hanshin-Awaji Earthquake was 1.5 times as much as the one, which was provided, in the then code. In Japan structures have strength which is from 1/4 to 1/2 times as much as the elastic. Plastic deformation capacity of structures can resist for the seismic force, which exceeds the strength of the structures. However, simple calculations are carried out in the structural design without considering structural behavior under the seismic force, which exceeds the strength of the structures. Purpose of this research project is establishment of methods to reveal dynamic collapse process and development of application to structural design.This research project was carried out from 1997 to 1999. We used workstation, which was set up in the University of Kyoto through Internet and hold carthquake motion and structures in common. Then the results, which were got by earch research members, were opened to public. Input and output datum were used each other and frequent discussions made syntheses.