Abstract
The input earthquake motions are different from place to place on the bedrock of long length structures. Seismic responses of underground pipe-like structures are influenced by this kind of spantial variations of the input earthquake motion.
In this paper, authors discussed about influences of the input earthquake motion with phase difference for seismic responses in surrounding ground of underground pipe-like structure. Seismic response analyses were carried out for homogeneous regular ground model and irregular ground model. From these analytical results, it could conclude as follows: 1) In case of homogeneous regular ground model, the seismic responses can be almost estimated by 1-Dimentional seismic response analysis. 2) In case of irregular ground model, seismic responses of inclined bedrock were more complicated by the input earthquake motion with phase difference. These responses were not estimated by 1-Dimentional seismic response analysis.
