Failure modes investigation of pipe structure under excessive seismic loading
Failure modes investigation of pipe structure under excessive seismic loading
著者:
Md Abdullah Al BARI Toshiaki KOKUFUDA Yamato KATSURA Takuya SATO Kazuyuki DEMACHI Naoto KASAHARA
発刊日:
公開日:
CollapseDesign extension conditionFailure modesPipe structureRatchetingSeismic loading
概要
Abstract: Preparation for DEC (design extension condition) is one of the lesson learned from Fukushima nuclear accident. From the structural point of view, it is needed to know the failure modes of the pipe structure to make adequate preparation against excessive seismic loading. But the failure modes under seismic loading are still not clear. Low cycle fatigue is one of the major failure modes observed at seismic experiments. Ratcheting is also observed at some other experiments. And collapse is assumed by design codes. In this article the characteristics of ratcheting and collapse under excessive seismic loading are investigated by simple beam analyses. The results show us some basic understanding on ratcheting propagation and collapse under excessive seismic loading.
