The Building Code of Japan (the Building Standard Law of Japan) has been changed from the former prescriptive type into a performance-based type in June, 2000. This paper presents the evaluation procedures for seismic performance of seismically isolated buildings against major earthquake motions newly introduced to the Building Code of Japan in October, 2000. The evaluation procedures apply the equivalent single-degree-of-freedom (ESDOF) system, equivalent linearization and response spectrum analysis. The basic concept of seismic design spectra for major earthquake motions is (1) basic design spectra defined at the engineering bedrock, and (2) evaluation of site response from geotechnical data of surface soil layers. The principle of evaluation procedures is that the predicted response values should not exceed estimated limit values. The evaluation criteria of each portion of a building are (1) the isolation system shall be designed so that the maximum response displacement does not exceed the design limit displacement, and (2) the structure above the isolation system and the foundation and structural elements below the isolation system shall be designed so that the working stress does not exceed the allowable stress. The scope of application of the evaluation procedures is (1) buildings not exceeding 60 meters in height, and (2) base isolation buildings on the soil layers excluding very soft soils.

Issue Section:
Technical Papers
Keywords:
earthquakes, civil engineering, seismology, building, architecture, soil
Topics:
Design, Displacement, Soil, Structures, Building codes, Shear (Mechanics), Damping, Earthquakes
1.
Hiraishi, H., Midorikawa, M., Teshigawara, M., Gojo, W., and Okawa, I., 2000, “Development of Performance-Based Building Code of Japan-Framework of Seismic and Structural Provisions,” Proc. 12th World Conference on Earthquake Engineering, Paper ID 2293.
2.
Midorikawa, M., Hiraishi, H., Okawa, I., Iiba, M., Teshigawara, M., and Isoda, H., 2000, “Development of Seismic Performance Evaluation Procedures in Building Code of Japan,” Proc. 12th World Conference on Earthquake Engineering, Paper ID 2215.
3.
Kuramoto, H., Teshigawara, M., Okuzono, T., Koshika, N., Takayama, M., and Hori, T., 2000, “Predicting the Earthquake Response of Buildings Using Equivalent Single Degree of Freedom System,” Proc. 12th World Conference on Earthquake Engineering, Paper ID 1093.
4.
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5.
Ministry of Land, Infrastructure and Transport, 2000, “Notification No. 1446-2000, Technical Standard for Specifications and Quality of Structural Materials,” (in Japanese).
6.
Ministry of Land, Infrastructure and Transport, Building Research Institute, Japan Conference of Building Officials, Japan Society of Seismic Isolation, and Building Center of Japan, 2001, “Commentary on Technical Standards and Calculation Procedures of Seismically Isolated Buildings,” Kogaku-tosho (in Japanese).
7.
Building Research Institute, Japan Society of Seismic Isolation, and Kenchiku Kenkyu Shinko Kyokai, 2001, “Technical Background of the Provisions of Seismically Isolated Buildings in the Revised Building Standard Law of Japan,” Gyosei (in Japanese).
8.
Ministry of Land, Infrastructure and Transport, 2000, “Notification No. 1457-2000, Technical Standard for Structural Calculation of Response and Limit Strength of Buildings,” (in Japanese).
9.
Ministry of Land, Infrastructure and Transport, 1980, “Notification No. 1793-1980, Technical Standard for Calculation of Seismic Story Shear Distribution Factor along the Height of a Building Structure, etc.,” (in Japanese).
Copyright © 2004
 by ASME
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