Abstract
Abstract The responses of piping systems subjected to nonstationary seismic waves are investigated. A piping system subjected to non-stationary artificial seismic waves is modeled using L-shaped piping supported by elasto-plastic supports. The nonstationary seismic waves are produced through a stationary stochastic Gaussian noise process weighted by a deterministic function. This deterministic function has similar seismic frequency characteristics as an actual earthquake. The power of an artificial seismic wave is adjusted by equalizing the power of the white Gaussian noise. Next, the reliability of the piping based on its stress, energy absorption ratio from the support, and energy absorption balance are employed as indices. Based on these indices, the response of piping subjected to nonstationary seismic waves is investigated and compared to the response subjected to stationary Gaussian noise. The reliability of the piping system, the energy absorption ratio of the supports, and the energy absorption balance based on the application of white noise and nonstationary waves as inputs are investigated.
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