東京新宿に於ける地中地震観測資料

概要

論文の詳細を見る
For the purpose of considering ground conditions when dynamic analysis is made on tall buildings and in order to investigate the amplification characteristics of seismic waves by the effect of the ground, we have made continual observations of ground motion using the underground seismometers in Shinjuku Subcenter since February, 1967, where many tall buildings are expected to be built in the future. The seismometers were set at the bottoms of four bore holes and the depths of these holes were GL-81.6m (in the layer of sandy gravel), GL-27.0m (in Diluvial Tokyo gravel layer), GL-13.0m and GL-13.0m (both in the surface layer). The seismic records were read by analog-digital converter, the sensitivity and the phase lag of the seismometers corrected, and then the records were presented in I.B.M. cards. The records that have been digitized till now are shown in Table 2 and a few examples of their response spectra are shown in Fig.10 through 14.
1968-11-30