Large-Scale Shake Table Test on Behavior of Underground Structure with the Curved Portion During an Earthquake
Yohsuke Kawamata*1,†, Manabu Nakayama*2, Ikuo Towhata*3, and Susumu Yasuda*4
*1National Research Institute for Earth Science and Disaster Resilience (NIED)
1501-21 Nishikameya, Mitsuta, Shijimicho, Miki, Hyogo 673-0515, Japan
*2Kobe Gakuin University, Hyogo, Japan
*3Kanto Gakuin University, Kanagawa, Japan
*4Tokyo Denki University, Saitama, Japan
Underground structures are generally considered to have high seismic performance and expected to play an important role as a base for reconstruction even after a destructive earthquake. Rigidity changing points, such as jointed and curved portions of underground structure, where localized deformation and stress is supposed to be generated, are ones of the most critical portions in terms of seismic performance of underground structure. Because the underground structure in a mega-city functions as a network, local damage could lead to fatal dysfunction. Accordingly, rigidity changing points and their surrounding area could significantly influence the resiliency of urban functions, and it is indispensable to evaluate their seismic performance and dynamic responses during earthquakes. The responses of rigidity changing points and their surrounding area to earthquakes have been tried evaluating by using large-scale numerical analyses, there is no case available where the responses have been measured in detail. For this reason, it is difficult to verify the validity of the results of such evaluations.
In light of the above, the shake table test was conducted at E-Defense using a coupled specimen of soil and underground structures to obtain detailed data, especially on the localized responses around rigidity changing points during the earthquake. Based on the data obtained, the behavior of the underground structure with a curved portion at the time of an earthquake was analyzed comprehensively. As a result of the analysis on the test data, it is found that there is a strong correlation between the localized deformation of the curved portion of the tunnel and the displacement of the surrounding ground. In addition, it is necessary to conduct a three-dimensional seismic response analysis not only around the rigidity changing point but also in wider area.
-  The Kansai Chapter of Japan Society of Civil Engineers, “Lessons from the Hanshin-Awaji Great Earthquake Disaster,” Vol.II, June, 1998.
-  T. Yamato, T. Umehara, H. Aoki, S. Nakamura, J. Ezaki, and I. Suetomi,“Damage to Daikai Subway of Kobe Rapid Transit System and Estimation of its Reason during the 1995 Hyogoken-Nanbu Earthquake,” J. of JSCE, No.537/I-35, pp. 303-320, 1996.
-  Japan Society of Civil Engineers, “Standard Specifications for Tunneling – 2006: Shield Tunnels, 2006.
-  Ministry of Land, Infrastructure, Transport and Tourism, “Survey Report on Earthquake-proof of Underground Shopping Center,” March, 2010.
-  K. Sakai, N. Horichi, N. Yanase, M. Iwanami, Y. Nishida, K. Miyazawa, and T. Kasuya, “The Investigation Report of Underground Space in Sendai by East Japan Great Earthquake,” Procs. of the Symposium on Underground Space, Vol.17, pp. 1-6, 2012.
-  H. Yokoyama, M. Itou, T. Sakamoto, H. Tanaka, and K. Yamada, “Centrifuge Model Test on Cutting Face Stability during Vertical Shield Construction in Cohesive Soils Ground,” Procs. of Tunnel Engineering, JSCE, Vol.8, pp. 301-306, 1998.
-  M. Ogasawara, K. Tsuno, Y. Fujii, T. Hirai, and Y. Hatanaka, “Study for Earth Pressure Acting on Two Shield Tunnels Constructed Closely in Parallel in Clay Soil,” Procs. of Tunnel Engineering, JSCE, Vol.7, pp. 47-54, 1997.
-  C. He and A. Koizumi, “Shaking Tests and Dynamic Behavior Analyses in Longitudinal Direction of Shield Tunnel under Transverse Seismic Force,” J. of JSCE, No.624/III-47, pp. 145-164, 1999.
-  C. He and A. Koizumi, “Shaking Tests and Dynamic Behavior Analyses in Longitudinal Direction of Shield Tunnel under Axial Seismic Force,” J. of JSCE, No.624/III-47, pp. 165-181, 1999.
-  N. Ohbo, T. Ichimura, T. Yamada, H. Itami, and M. Hori, “3-Dimensional Seismic Response of Underground Structures with Jointed and Diverged Parts,” J. of JSCE Earthquake Engineering, Vol.29, 2007.
-  H. Dobashi, T. Ichimura, N. Ohbo, M. Hori, and T. Yamada, “Study on Necessity of Large-scale Three-dimensional Analysis for Evaluating Seismic Response of Large Tunnel having Complex Structure,” J. of JSCE, Vol.64, No.3, 2008.
-  Japan Society of Civil Engineers, “References to the Seismic Design for Shield-driven Tunnel,” 2007.
-  K. Ohtani, N. Ogawa, T. Katayama, and H. Shibata, “Construction of E-Defense (3-D full-scale earthquake testing facility),” the 2nd Int. Symposium on New Technologies for Urban Safety of Mega Cities in Asia, pp. 69-76, 2003.
-  Ministry of Education, Culture, Sports, Science and Technology and National Research Institute for Earth Science and Disaster Prevention, “Research Theme No.2 Annual Report of the fiscal year 2005,” Special project for earthquake disaster mitigation in urban areas, 2006.
-  Ministry of Education, Culture, Sports, Science and Technology and National Research Institute for Earth Science and Disaster Prevention, “Research Theme No.2 Annual Report of the fiscal year 2006,” Special project for earthquake disaster mitigation in urban areas, 2007.
-  I. Towhata, Y. Kawamata, M. Nakayama, and S. Yasuda, “E-Defense Shaking Test on Large Model of Underground Shaft and Tunnels,” Keynote Lecture, the 8th Int. Symposium on Geotechnical Aspects of Underground Construction in Soft Ground, 2014.
-  Y. Kawamata, M. Nakayama, I. Towhata, and S. Yasuda, “Dynamic behaviors of underground structures in E-Defense shaking experiments,” Soil Dynamics and Earthquake Engineering, Vol.82, pp. 24-39, 2016.
-  Y. Kawamata, M. Nakayama, I. Towhata, S. Yasuda, K. Maekawa, K. Tabata, and K. Kajiwara, “Dynamic Behaviors of Vertical Shafts in E-Defense Experiment,” Second European Conf. on Earthquake Engineering and Seismology, Istanbul, Turkey, 2014.
-  Y. Nakamura, F. Uehan, and H. Inoue, “Waveform and its Analysis of the 1995 Hyogo-Ken-Nanbu Earthquake (II),” JR Earthquake Information, No.23d, 1996.
-  Y. Kawamata, M. Nakayama, I. Towhata, S. Yasuda, and K. Tabata, “Large-scale Experiment using E-Defense on Dynamic Behaviors of Underground Structures during Strong Ground Motions in Urban Areas,” the 15th World Conf. of Earthquake Engineering, Lisbon, Portugal, 2012.
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