Council on Tall Buildings and Urban Habitat
CTBUH Research Division in Japan:
Meetings at the Building Research Institute and the Disaster Prevention Research Institute
April 16 – 23, 2018

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See more on CTBUH Research Division's Trip to Japan

TSUKUBA – Angela Mejorin, CTBUH Research Assitant, and the research sponsor representative, Shuji Miyamoto, the Sales Manager of Trosifol, met with Dr. Yasuo Okuda, the Director of the Structural Engineering Department of the Building Research Institute, which is a national research and development agency of Japan.

This Institute was founded in 1942 and conducts technological investigations, testing, research and development on buildings, as well as technical guidance and dissemination of their results. The Building Research Institute strives to maximize the results of research and development in order to contribute to the stable development of national economy and public welfare through the improvement of science and technology. The Institute is directed by the Minister of Land, Infrastructure, Transport and Tourism and it aims to realize a safer urban environment, spearheaded by the “Safe and Secure Program”. It is conducting various research activities that contribute to the mitigation of building damage caused by natural disasters such as typhoons. The research and development activities are carried out in cooperation with stakeholders from industrial and academic sectors, and the results are shown to the public via new governmental policies and technical standards related to building technology. These policies and standards are then used for development, design and construction by the private-sectors.

Dr. Yasuo Okuda, Director of the Structural Engineering Department of the Institute, and Angela Mejorin, CTBUH at the Building Research Institute test lab, Tsukuba.

Dr. Yasuo Okuda illustrated to CTBUH and Trosifol the results of the research activities conducted by the Building Research Institute, done in collaboration with the Disaster Prevention research Institute of Kyoto University. In 2012 they completed a study on the clarification of verification methods for wind resistant performance for the external building cladding and they published the results in the research paper, “Developing Shock Resistance Test Methods for Flying Debris on the Cladding”. The paper reported the testing procedure to be conducted on the building envelope for two building typologies: facilities involved with hazardous materials and disaster base buildings. This procedure refers to the existing shock resistance test methods for flying-borne debris on typhoon-prone façades found in ASTM and ISO.

KYOTO – Next, the CTBUH and Trosfol representatives had a meeting with Dr. Takashi Maruyama, Professor of Wind Engineering and Wind Resistant Structures of the Research Division of Atmospheric and Hydrospheric Disasters at the Disaster Prevention Research Institute, Kyoto University.

Since its inception in 1951, the Disaster Prevention Research Institute of Kyoto University has been pursuing principles of natural disaster reduction, establishing integrated methodologies for disaster prevention on the basis of natural and social sciences. In 2010, the Institute was certified as a national Joint Usage/Research Center in Japan for performing various integrated research on natural disaster reduction and disaster prevention at local and global scales. Accordingly, with the support from the Scientific and Technical Advisory Group of the United Nations Office for Disaster Risk Reduction, the Global Alliance of Disaster Research Institute was established at the Disaster Prevention Research Institute, as a collaborative platform for discussion, sharing knowledge and promoting networks on topics related to risk reduction and resilience to disasters. The DPRI shares their advanced knowledge and technology in natural hazards and disasters, which helps society understand and take measures for disaster prevention, advises governments on disaster prevention strategies, and continues to excel as a Global Center of Excellence.
The equipment developed by Professor Takashi Maruyama at the Disaster Prevention Research Institute, Kyoto University, in order to conduct the impact test on a typical Japanese roof tile.
Professor Takashi Maruyama developed a study based off of a research paper presented by Dr. Yasuo Okuda of the Building Research Institute. At the Disaster Prevention Research Institute, CTBUH visited the test lab where the study was conducted. Professor Maruyama improved the ASTM and ISO standard tests, increasing the missile typologies for the impact on the cladding that simulates the wind-borne debris during a typhoon event. This improvement aimed to verify the adequateness of the international and US standards for the amount of energy to be absorbed by the building envelope, calculating the energy produced by the typical roof tiles debris that could fly through the air. He showed the device developed by the Research Institute to be added to the air cannon in order to impact the specimen with a Japanese roof tile.
The air cannon for the missile impact test of the wind-borne debris simulation and the pressure chamber used for the positive and negative pressure cycling test at the Disaster Prevention Research Institute, Kyoto University. From left to right: Professor Takashi Maruyama, Kyoto University; Angela Mejorin, CTBUH ; Shuji Miyamoto, Trosifol.