JDR Vol.4 No.3 pp. 199-207
doi: 10.20965/jdr.2009.p0199


Seismic Isolation Retrofit for Large-Scale Government Building Identified as Cultural Assets

Takao Nishizawa

Structural Engineering Department, NIKKEN SEKKEI Ltd., Japan, 4-15-32 Sakae, Naka-ku, Nagoya 460-0008, Japan

February 27, 2009
May 7, 2009
June 1, 2009
seismic retrofit, cultural assets, base isolation, simulated earthquake motion
The Aichi Prefectural Government building in Nagoya, designated a national registered cultural asset and an important disaster prevention facility, was found in 2002 to be seismically inadequate for anticipated earthquakes. While seismic retrofitting has been considered, however, no report has, to our knowledge, compared retrofitting alternatives in depth. The building is located in a Nagoya district scheduled for disaster prevention measures anticipating the Tokai and Tonankai earthquakes - two “super shakers” expected to devastate major Japanese cities, including Tokyo, and decimate the urban population in the not too distant future. These quakes are expected to produce long-term earthquake movement with amplified long-period components and to damage long-period structures such as skyscrapers and base-isolated buildings. In 2003, we selected seismic retrofitting as the optimum answer given the prefectural building’s features. We made objective comparisons working with academic experts and, in 2004, jointly examined the building using simulated earthquake motion based on the latest knowledge and data, making the main building a highly earthquake-resistant structure. This paper reports our findings and the aftermath of recommendations. The building appearance and building structure conception diagram are shown in Fig. 1.
Cite this article as:
T. Nishizawa, “Seismic Isolation Retrofit for Large-Scale Government Building Identified as Cultural Assets,” J. Disaster Res., Vol.4 No.3, pp. 199-207, 2009.
Data files:
  1. [1] Aichi building housing center, “The making of the base earthquake vibration for the quakeproof repair that considered a local characteristic in the Nagoya-shi sannomaru district,” 2004.
  2. [2] Takao N., H. Yamamoto, S. Kawaguchi, S. Kaneko, “The report of cyclic load test of lead rubber bearing,” Architectural Institute of Japan Summaries of Technical Papers of Annual Meeting 2004, pp. 445-446, 2004.
  3. [3] Takao N., O. Tomio, M. Ohnishi, “Summary of study for the best choice of seismic retrofit for Aichi prefectural office building,” AIJ Technol. Des. No.24, pp. 177-182, 2006.
  4. [4] Aichi building housing center, “The report of investigation of structure of Aich prefectural office building,” 2003.
  5. [5] Architectural Institute of Japan, Tokai branch History design Committee, “Modern architecture in Tokai,” 1981.

*This site is desgined based on HTML5 and CSS3 for modern browsers, e.g. Chrome, Firefox, Safari, Edge, Opera.

Last updated on May. 10, 2024