We have updated the papers published in 2021 (http://www.steel.dpri.kyoto-u.ac.jp/wpsmpl/publications). They are mainly the results of activities before the COVID-19 pandemic.

– This paper is about an experiment conducted in 2017 with Dr Jason McCormick’s research team at the University of Michigan as part of the development of a steel pipe brace with foam.
Ammons, M., Shimada, H., McCormick, J., Kurata, M., “Experimental Investigation of Foam Filled CHS Braces under Cyclic Cyclic Loading,” Journal of Structural Engineering, 147(5), 04021044, 2021.5, https://doi.org/10.1061/(asce)st.1943-541x.0002993

– This is a paper on the development of a method for estimating the time history of the acceleration response of all floors of a building by combining the acceleration response observed on limited floors with a time-varying model, which was conducted with Prof. Li Xiaohua of Chongqing University, a graduate of our laboratory.
Li, X., Kurata, M., Wang, Y-H., Nakashima, M. “Estimating Earthquake-Induced Displacement Responses of Building Structures Using Time-Varying Model and Limited Acceleration Data,” Journal of Structural Engineering, 147(4), 04021014, 2021.4, https://doi.org/10.1061/(asce)st.1943-541x.0002973

– The research results are from Akito Fukuzawa’s graduation thesis in 2020. As a part of the inter-departmental collaboration research, we tried to make a new evaluation of dynamic interaction, which is a classical research subject, by using valuable building observation records given by the Building Research Institute.
Akito Fukuzawa, Yoshiki Ikeda, Masahiro Kurata: Evaluation of Dynamic Interaction between Ground and Reinforced Concrete Buildings Based on Vibration Mode Characteristics Identified from Seismic Records at the Base and Top of Buildings and Surrounding Ground Surface, Journal of Structural Engineering, Vol. 67B, pp. 483-494, 2021.3 (in Japanese)

– These papers are about a method to evaluate the vibration characteristics of a low-rise steel building with irregular planes from microtremor measurement records, which we have been working on since 2017. The whole laboratory was involved in the microtremor observation. We usually work on individual topics, but sometimes it is good to go on a business trip with many people.
J. Xie, Y. Ikeda, and M. Kurata: Vibration Characteristics of Large Low-Rise Commercial Buildings Based on Microtremor Measurements, Journal of Structural Engineering, Vol. 67B, pp. 495-507, 2021.3
J. Xie, Y. Ikeda, and M. Kurata: Construction of a Linear Building Model with Multiple Degrees of Freedom for Earthquake Response Analysis Based on Microtremor Measurements, Journal of Structural Engineering, JSCE, Vol. 67B, pp. 509-518, 2021.3

– A study of seismic vulnerability assessment of nonstructural members in the Tokyo Metropolitan Area Resilience Project started in 2016. We investigated the vulnerability of ceilings that have a rise-up, although the size of a living room level does not cause severe damage such as falling ceilings.
Qi, L., Kurata, M., Ikeda, Y., Kunitomo, K., Takaoka, M. “Seismic evaluation of two-elevation ceiling system by shake table tests,” Earthquake Engineering and Structural Dynamics, 50(4), pp. 11447-1166, 2021.4, https://doi.org/10.1002/eqe.3390

– Prof. Ikeda developed a theoretical equation to understand the behavior of structures with intermediate layer seismic isolation.
Ikeda Y. “Fundamental equation based on pole allocation for interstory seismic isolation of buildings,” Structural Control Health Monitoring, 28(3), 2021.3, https://doi.org/10.1002/stc.2687

– A joint research with the University of Canterbury, New Zealand, has been conducted during the 2016-2017 academic year. We continued monthly online meetings with Dr Timothy Sullivan, who was Kurata’s TA when he studied in Italy, and Dr Greg MacRae. It was a precious time when I borrowed the heart of my respected seniors. The paper is about a discussion of losses due to damage to non-structural members during earthquakes.
Arfin, F.A., Sullivan, T., MacRae, G., Kurata, M., Takeda, T. “Lessons for loss assessment from the Canterbury earthquakes: a 22-storey building,” Bulletin of Earthquake Engineering, 19(5), pp. 2081-2104, 2021.3, https://doi.org/10.1007/s10518-021-01055-7

– The paper is about the joint research with Yu Ohtsuki, a PhD student at Georgia Institute of Technology from 2018, and his PhD advisor, Dr. Yang Wang. The method was verified.
Otsuki, Y., Li, D., Dey, S.S., Kurata, M., Wang, Y. “Finite Element Model Updating of an 18-Story Structure using Branch-and-Bound Algorithm with Epsilon-Constraint,” Journal of Civil Structural Health Monitoring, 2021.1, https://doi.org/10.1007/s13349-020-00468-3

– This paper is a report on the development of steel members using high-frequency heat refining technology, which was conducted with Nishiyamatani Laboratory in the Department of Architecture. We have published several papers on the application of this technology to eccentric braces, mainly by Ikeda-Kurata Lab. This research is a study on the strengthening of steel members around through holes, which Nishiyama-Tani Lab.
Liu, Y., Nishiyama, M., Tani, M., Kurata, M., Iwata, K., “Steel beam with web opening reinforced by induction heating,” Journal of Constructional Steel Research, Volume, 176, 106399, https://doi.org/10.1016/j.jcsr.2020.106399, 2021.1