Name JIAO Yu
Official Title Associate Professor
Affiliation Department of Architecture, Faculty of Architecture and Urban Design
Profile Dr. Jiao was born in Shanghai, China. She graduated from Shanghai Jiao Tong University in 2002, majored in structural engineering. In 2006, she started graduate school in Tokyo Institute of Technology, and got the Doctor of Engineering degree in 2012. The thesis title is: “Plastic Deformation Capacity of Steel Beam Suffering Ductile Facture under Random Loading History”. Dr. Jiao worked as an assistant professor in Tokyo University of Science from 2012 to 2017. She started JIAO-LAB in Tokyo City University since 2017. Dr. Jiao has published 33 pre-review journal papers in English or Japanese, and has presented in over 35 international conferences.
Research Field(Keyword & Summary)
  1. 1) Deformation capacity of structural steel and components

    Plastic deformation capacity of steel components is very important in evaluating the seismic capacity of steel structures. Ductile fracture is one of the most typical steel component failure modes during earthquakes, which is often observed at beam ends close to the beam to column connections, in the middle of the span, or at the connections of steel braces, etc. This study covers the deformation capacity (low cycle fatigue life) of structural steel commonly used in Japan such as SN400, SN490, SA440, and structural components like steel beams when subjected to random cyclic loading.

  2. 2) Seismic behavior of steel structure after fire

    Most of the buildings in Japan has experienced or will experience earthquake. Some of them was once subjected to fire during construction or after. The design recommendation in Japan suggests a two-step assessment to determine if the components need to be replaced or repaired. However, the design recommendation only focuses on the strength of the components, it is necessary to evaluate their deformation capacities consider future earthquakes. This study evaluates the deformation behavior of steel components after fire, with which the seismic behavior of the steel structure will be discussed.

Representative Papers
  1. 1) Cumulative deformation capacity of structural steel subjected to extremely large amplitude strain histories, Jiao, Y., Yamada, S., Journal of Building Engineering, 2021, 41, 102649
  2. 2) Deformation capacity of 400 N/mm2 class structural steel under extremely large strains, Yamada, S., Touch, T., Jiao, Y., Ishida, T., Kishiki, S., Journal of Constructional Steel Research, 2021, 182, 106678
  3. 3) A Concise Hysteretic Model of 590 N/mm2 Grade High Performance Steel Considering the Bauschinger Effect, Yamada, S., Jiao, Y., Lee, D.-S., Ishida, T., Kishiki, S., International Journal of Steel Structures, 2020, 20(6), pp. 1979–1988
  4. 4) Low-cycle fatigue performance assessment of current Japanese steel beam-to-column connections determined by ductile fracture, Kishiki, S., Lee, D.-S., Yamada, S., Ishida, T., Jiao, Y., Engineering Structures, 2019, 182, pp. 241–250
  5. 5) Seismic performance of ductile steel moment-resisting frames subjected to multiple strong ground motions, Tenderan, R., Ishida, T., Jiao, Y., Yamada, S., Earthquake Spectra, 2019, 55(1), pp. 289–310
  6. 6) Reliability of U-shaped steel dampers used in base-isolated structures subjected to biaxial excitation, Ene, D., Yamada, S., Jiao, Y., Kishiki, S., Konishi, Y., Earthquake Engineering and Structural Dynamics, 2017, 46(4), pp. 621–639
  7. 7) A concise hysteretic model of structural steel considering the Bauschinger effect, Yamada, S., Jiao, Y., International Journal of Steel Structures, 2016, 16(3), pp. 671–683
  8. 8) Effect of bi-directional ground motions on the damage evaluation of u-shaped steel dampers for base-isolated structures, Yamada, S., Ene, D., Kishiki, S., ...Konishi, Y., Hoashi, Y., Journal of Structural and Construction Engineering, 2016, 81(724), pp. 1027–1037
  9. 9) Low cyclic fatigue and hysteretic behavior of U-shaped steel dampers for seismically isolated buildings under dynamic cyclic loadings, Jiao, Y., Kishiki, S., Yamada, S., ...Hoashi, Y., Terashima, M., Earthquake Engineering and Structural Dynamics, 2015, 44(10), pp. 1523–1538
  10. 10) Evaluation of plastic energy dissipation capacity of steel beams suffering ductile fracture under various loading histories, Jiao, Y., Yamada, S., Kishiki, S., Shimada, Y., Earthquake Engineering and Structural Dynamics, 2011, 40(14), pp. 1553–1570
Award The award of Japan Society of Seismic Isolation (2017)
Grant-in-Aid for Scientific Research Support: Japan Society for Promotion of Science (JSPS)
Research Grants/Projects including subsidies, donations, grants, etc. Research Grants from "The Japan Iron and steel Federation" (2019)
Affiliated academic society (Membership type) AIJ(member), JSSC(member), JSSI(member)
Education Field (Undergraduate level) Structural mechanics, Seismic design
Education Field (Graduate level) Structural planning