EAPSI: Evaluation and Comparison of the Collapse Vulnerability to Earthquakes of Steel Frame Buildings in the U.S. and Japan

这项研究将在日本京都大学进行，在日本防灾研究所教授（兼前所长）Masayoshi Nakashima博士的监督下进行，自20世纪80年代以来，他一直是美日地震工程联合研究项目的领导者。该项目将调查日本钢框架建筑在地震中倒塌的脆弱性。将设计结合日本设计规范和常用设计实践的具有代表性的6层钢框架建筑，并由研究人员模拟相应的计算机模型。研究人员已经完成了一个类似的项目，根据美国建筑规范和设计实践设计了6层建筑，因此将对两国的建筑进行比较。这个研究项目将展示美国和日本建筑物的相对地震安全性，并且是帮助社区更好地了解其建筑物倒塌风险的更大努力的一部分。该项目将为日本6层钢框架建筑的倒塌脆弱性评估提供框架。研究人员?他在过去的工作中开发了一个框架，用于估算洛杉矶6层钢矩框架建筑的最终强度和延性，该框架仅基于建筑年份和城市内的位置。该项目将把这项工作扩展到日本建筑。代表性建筑将根据日本的主要地震带和土壤类型，根据2000年（日本地震规范发生重大变化的一年）前后的设计规范和实践进行设计。将进行推覆分析，以确定这些建筑物的极限强度和延性。这两个参数将与设计基础剪力和/或施工年份之间建立关系。随着这个框架的发展，它将允许研究人员在计算上有效地进行大规模的模拟，在城市范围内模拟地震，以便准确地确定城市？美国的地震恢复能力。将与美国建筑进行比较，以了解不同的设计规范和工程实践如何影响建筑在倒塌方面的性能。该奖项隶属于东亚和太平洋暑期研究所项目，由美国国家科学基金会和日本科学促进会共同资助，支持一名美国研究生进行暑期研究。

This research will be conducted at Kyoto University in Japan under the supervision of Dr. Masayoshi Nakashima, professor (and former director) at the Disaster Prevention Research Institute of Japan and a leader in U.S./Japan joint research programs in earthquake engineering since the 1980s. The project will investigate the vulnerability to earthquake-induced collapse of steel frame buildings in Japan. Representative 6-story steel frame buildings that incorporate Japanese design codes and common design practices will be designed and corresponding computer models will be simulated by the researcher. The researcher has completed a similar project with 6-story buildings designed based on U.S. building codes and design practices, so comparisons will be made between buildings from both countries. This research project will demonstrate the relative earthquake safety of buildings in the U.S. and Japan and is part of a larger effort to help communities better understand the risk for collapse of their buildings.The project will provide a framework to estimate the collapse vulnerability of 6-story steel moment frame buildings in Japan. The researcher?s past work has developed a framework for estimating the ultimate strength and ductility of 6-story steel moment frame buildings in Los Angeles based solely on the construction year and location within the city. The project will extend this work to Japanese buildings. Representative buildings will be designed based on the main seismic zones and soil types in Japan according to design codes and practices before and after 2000 (a year of major changes in the seismic code of Japan). Pushover analysis will be conducted to determine the ultimate strength and ductility of these buildings. A relationship will be developed between these two parameters and the design base shear and/or construction year. As this framework develops, it will allow researchers to computationally efficiently conduct large scale simulations on the city-wide scale to scenario earthquakes in order to accurately determine the city?s earthquake resiliency. Comparisons will be made to U.S. buildings to see how the different design codes and engineering practices affect building performance with regards to collapse.This award under the East Asia and Pacific Summer Institutes program supports summer research by a U.S. graduate student and is jointly funded by NSF and the Japan Society for the Promotion of Science.