Comments regarding "Seismic damage analysis due to near-fault multipulse ground motion" by Guan Chen, Jiashu Yang, Ruohan Wang, Kaiqi Li, Yong Liu, Michael Beer; Earthquake Engineering & Structural Dynamics, 2023

This discussion is based on the paper by Chen et al. in 2023 (hereafter referred to as "the original paper/authors"). In their study, the original authors conducted a series of analyses using nonpulse, single-pulse, and multipulse ground motion records, evaluating their impact on a frame structure, a slope, and a gravity dam. Their key finding suggests that multipulse ground motion leads to more severe structural damage compared to nonpulse and single-pulse ground motions. However, it is important to note that the seismic damage analysis of the gravity dam in this paper does not adhere to state-of-the-practice recommendations. Consequently, drawing a definitive conclusion regarding the influence and importance of multipulse ground motion records on the seismic response of concrete dams requires further justification. This necessitates the incorporation of high-fidelity numerical models and probabilistic performance evaluation. We will discuss the significance of modeling assumptions, specifically addressing the dam-rock dynamic interaction in crack propagation and failure in dams.