地震観測記録に基づく地下式円筒貯槽のひずみ応答特性

抄録

The earthquake observation has been carried out on the large-scale in-ground LNG storage tank made of reinforced concrete. The strains of the side wall and the accelerations were recorded. The strain response characteristics investigated by the records and FEM analyses are as follows: (1) The circumferential component strain caused by the axial force is predominant in all earthquakes. (2) The circumferential distribution modes of the circumferential component strains are predominant in the following two modes, i. e., the axisymmetric mode or the sine mode which is caused by the ring deformation mode. (3) The SH body wave causes the sine mode. One of the earthquake ground motion components which causes the axisymmetric mode is the Rayleigh wave.