Seismic Vulnerability Analysis of UHV Flat Wave Reactor Based on Probabilistic Seismic Demand Model

UHV Flat Wave Reactor is one of the important equipment of UHV converter station. Once damaged in an earthquake, it may cause the breakdown of the power system, resulting in serious economic losses and casualties. Therefore, analyzing its seismic vulnerability is significantly important. Firstly, failure modes, key vulnerable parts (weak parts), and seismic damage limit states of the structure under seismic action were analyzed by seismic damage investigation and finite element simulation. Secondly, based on the incremental dynamic analysis (IDA), the peak ground acceleration (PGA) was used as the input parameter to obtain the seismic response of key vulnerable parts. Thirdly, the seismic vulnerability curves of each key vulnerable part under different seismic damage states (complete, extensive, moderate, and slight) were generated by probabilistic seismic demand model (PSDM). Finally, through the reliability theory, the seismic vulnerability curves of UHV Flat Wave Reactor can be obtained. The results shown that this seismic vulnerability curve can give the probabilities of four seismic damage states for UHV Flat Wave Reactor under different PGA and reflects the seismic performance level of the structure, which provide reference for performance design and earthquake relief work.