Abstract: Fragility curves carry significant implications for post-earthquake structural evaluation and provide design guidance for structural design of new construction. Fragility curves have been extensively studied for building and bridge structures, whereas research on fragility curves remains notably scarce in the petrochemical sector. In this paper, a 120m height reinforced concrete chimney was selected to conduct the nonlinear response history analysis. And 15 strong ground motion records from the Pacific Earthquake Engineering Research Center (PEER) worldwide were selected, and scaled to six seismic excitation levels. Then the incremental dynamic analysis method was adopted to get the fragility curves for the RC chimneys, providing a theoretical basis and data support for post-earthquake evaluation of reinforced concrete chimneys.

Key words: reinforced concrete (RC) chimney, incremental dynamic analysis, spectral acceleration at the fundamental period, fragility curves