Abstract
Piping systems used for an extended period may develop degradations such as cracks or wall thinning due to aging. In order to clarify the behavior of piping systems with a crack under seismic events, shake table tests for simply designed piping system models with a crack were conducted. The test results showed that the existence of a crack did not have significant effect on the vibration characteristics of the piping system model both under the elastic and elastic-plastic response. The failure mode obtained from the test was crack penetration from the initial crack. The first excursion failure did not occur though the maximum applied moment exceeded the leak moment determined by the Net-section criterion.
