Soil Behaviour in Earthquake Geotechnics




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PREFACE

Since the late 1960s fairly accurate measurements of soil properties under dynamic loading conditions have been made in the laboratory and in situ. A summary of the then current knowledge on this subject was published by the author in 1976 (in Japanese) entitled Fundamentals of Soil Dynamics.

With the further development of new techniques, a vast amount of reliable data has subsequently been produced and is now used for the analysis and design of foundations and earth structures taking into account the effects of earthquake- induced loads. Because of the abundance and diversity of the data it was difficult to review and summarize all of them in a proper perspective. As such, the content included in this book does not necessarily cover all relevant information, and may be biased towards the efforts of the author and other Japanese workers.

The structuring of this book draws basically on the framework of the previous book published in Japanese. Several years have passed since the author started writing the draft. In the meantime, overall encouragement by Professor M. Fukuoka was helpful in advancing the writing work. My colleagues, Professor F. Tatsuoka of

the University of Tokyo, Dr T. Kokusho of Central Research Institute of Electric Power Industry, Professor S. Yasuda of Tokyo Denki University, and Dr. S. Iai of

the Port and Harbour Research Institute have always been co-operative in providing most useful information and stimulating discussions on the subject matter.

The author wishes to acknowledge the co-operation and assistance by his

colleagues at the University of Tokyo, Professor I. Towhata, Mr K. Sugo, and

M. Yoshimine. The assistance by Dr R. P. Orense of Kisojiban Consultants is also acknowledged gratefully.


February 1995

Tokyo

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