Roles of Large-Scale Structural Testing –As Lessons Learned from 1995 Kobe and 2011 Tohoku Earthquakes
2017-05-05 14:49     (点击: )

Speaker: Masayoshi Nakashima

Time: 9:30 am, May 8,2017

Venue: Lecture Hall, 1st Floor, Bridges & Tunnels Research Center

Introduction:

Masayoshi Nakashima is Professor Emeritus at Kyoto University, Japan.  He earned his bachelor and master degrees from Kyoto University and Ph.D. from Lehigh University, the Unites States. He is Member of the Engineering Academy of Japan and also inducted in 2015 to Foreign Member of the National Academy of Engineering (NAE) of the United States. Currently, Nakashima serves as President of the Architectural Institute of Japan (AIJ) and President-Elect of International Association for Earthquake Engineering (IAEE). He also serves Editor of International Journal of Earthquake Engineering and Structural Dynamics (EESD).In April 2017, he joined as a special counselor Kajima Corporation and its affiliated research institution named Kobori Research Complex (KRC).

His fields of research include seismic analysis and design of steel building structures and large-scale experimental techniques for the simulation of earthquake responses.Nakashima and his students have published about four hundred technical papers, nearly two hundred of them appearing in archived journals. He has earned various national and international awards, including the Best Paper Prize of AIJ (Architectural Institute of Japan), the Best Paper Prize of JSSC (Japanese Society for Steel Construction), the ASCE (American Society of Civil Engineers) Moisseiff Award (2000), the Special Achievement Award of AISC (American Institute for Steel Construction) (2009), the ASCE Ernest E. Howard Award (2013), and the EERI (Earthquake Engineering Research Institute) George W. Housner Medal (2014), among others. 

Abstract:

It was 1995 when Japan was hit by a devastating earthquake named 1995 Kobe earthquake.  A scenery of collapses after collapses revealed that our cities were vulnerable with many existing stocks which were not constructed in most recent design and construction.  Various efforts in both the public and private sectors were implemented after the earthquake to upgrade our old infrastructures and buildings as well as to make our construction technologies more advanced for the creation of stronger and more durable societies. A notable effort along this line was the construction and operation of a very large shaking table nicknamed E-Defense. The presenter served as the inaugurating director of E-Defense and supervised over forty full-scale or large-scale tests.  A few representative tests are introduced, together with the backgrounds of those tests as well as with the difficulties associated with large-scale testing. Sixteen years have passed since 1995 Kobe; then Japan was severely hit again by a huge tsunami and earthquake named 1995 Tohoku earthquake.  Thanks to the advancement of seismic design and construction, performance of buildings and infrastructural systems was generally satisfactory, but a huge rupture of faults generated an unprecedented tsunami disaster. As lessons from the Tohoku damage, two issues, one “quantification of collapse margin for consideration of performance beyond the forces stipulated in design” and the other “immediate condition assessment for continuity of life and business”, were disclosed as serious problems to overcome in the field of structural engineering. A national project utilizing E-Defense was launched along this line, in which the presenter served as the principal investigator. The outline and major results of the tests, including a 18-story steel high-rise office building and a 5-story RC apartment building, are summarized, and major findings are presented.

 

主题:大型结构试验研究的重要性——1995年神户地震和2011年东北大地震经验教训

主讲人:中岛正爱(Masayoshi Nakashima

时间:58日上午9:30

地点:桥隧试验研发基地一楼学术报告厅

主讲人介绍:

Masayoshi Nakashima 教授是国际地震工程领域最具影响力的几位学者之一,他在钢结构抗震、抗震试验技术、以及隔震和消能减震结构方面作出了许多杰出的原创性工作,引领着现代地震工程的发展。Nakashima 教授是美国、日本、墨西哥三国院士,现任国际地震工程学会会长、日本地震工程学会副会长、日本结构工程委员会委员长、以及美国地震工程协会理事,现为国际地震工程领域最具影响力的期刊Earthquake Engineering and Structural Dynamics(防灾减灾方向期刊Top1)的主编,同时兼任其他四本著名学术期刊的编委。Nakashima教授曾任日本建筑学会副会长、世界最大地震模拟振动台E-Defense的主任。共发表学术论文250篇,SCI论文超过100篇。曾获美国土木工程师学会Moisseiff奖、美国钢结构协会特别贡献奖、日本文部省杰出科技贡献奖等多项国际重要奖励。此外,Nakashima教授在教育方面也有杰出贡献,在他指导下的博士生遍布世界各地、活跃于国际学术界和工业界,他还担任日本工程教育委员会指导专家。

 

摘要:

1995年,日本遭受了毁灭性的神户大地震。这次灾难性的地震表明:早期设计和建造的老旧建筑使我们的城市十分脆弱。地震后,为了建设一个更稳固持久的社会环境,许多研究人员做了各种努力来加固老旧建筑、开发更先进的技术。其中,一个里程碑式的事件就是世界最大振动台试验室E-Defense的建成及运行。主讲人作为首任主任领导监督了四十多次全尺寸/大尺寸模型实验。此次讲座将对一些具有代表性的试验研究进行介绍,包括试验研究的背景以及大尺寸模型试验研究所面临的困难。

神户大地震16年后,东北大地震及其引起的海啸再次袭击日本。由于抗震设计和施工技术的进步,建筑物和基础设施没有出现严重损坏,但是巨大的断层所引发的海啸导致了更严重的灾难性后果。

东北大地震后,超出结构设计规范的荷载情况的安全储备震后生活和商业可持续的快速评估被认为是结构工程领域需要克服的严重问题。主讲人作为世界最大振动台试验室E-Defense的首任主任,针对这两个问题展开了一系列的试验研究。本次讲座将以18层钢结构高层办公楼及5层钢筋混凝土公寓住宅楼为例,介绍E-Defense系列试验研究的概况以及主要成果。

上一条:2017年区域能源专题研讨会
下一条:Seismic performance of steel concentrically braced frames in Japan