Seismic Design of High-rise Buildings

摘要

In 1924, one year after the Great Kantc Earthquake that devastated Tokyo, Professor Toshikata Sano (1880-1956) added to the Urban Building Law a new requirement: the static horizontal seismic factor should be set as 0.1 or more. Ten years later, Professor Ryo Tanabashi (1907-1974) published an article in July 1934 stating that the seismic resistance of a structure cannot be adequately assessed simply by providing ample strength against a static horizontal force; he contended that the seismic impact should be expressed using the energy squared by the maximum ground velocity and that the resisting capacity of a structure should be assessed using the strain energy absorbed by the structure itself. In March of the same year, he suggested that research should be started on the construction, even in earthquake-prone Japan, of super high-rise buildings like those seen in New York.