TY - EJOU
AU - Zhou, Jilei
AU - Sun, Chuansong
AU - Dai, Xiangjun
AU - Chen, Guohai
TI - Seismic Reliability Assessment of Inelastic SDOF Systems Subjected to Near-Fault Ground Motions Considering Pulse Occurrence
T2 - Structural Durability \& Health Monitoring
PY - 2019
VL - 13
IS - 4
SN - 1930-2991
AB - The ground motions in the orientation corresponding to the strongest
pulse energy impose more serious demand on structures than that of ordinary
ground motions. Moreover, not all near-fault ground motion records present distinct
pulses in the velocity time histories. In this paper, the parameterized stochastic
model of near-fault ground motion with the strongest energy and pulse
occurrence probability is suggested, and the Monte Carlo simulation (MSC)
and subset simulation are utilized to calculate the first excursion probability of
inelastic single-degree-of-freedom (SDOF) systems subjected to these types of
near-fault ground motion models, respectively. Firstly, the influences of variation
of stochastic pulse model parameters on structural dynamic reliability with different
fundamental periods are explored. It is demonstrated that the variation of pulse
period, peak ground velocity and pulse waveform number have significant effects
on structural reliability and should not be ignored in reliability analysis. Then,
subset simulation is verified to be unbiased and more efficient for computing
small reliable probabilities of structures compared to MCS. Finally, the reliable
probabilities of the SDOF systems with different fundamental periods subjected
to impulsive, non-pulse ground motions and the ground motions with pulse occurrence
probability are performed, separately. It is indicated that the ground motion
model with the pulse occurrence probability can give a rational estimate on structural
reliability. The impulsive and ordinary ground motion models may overestimate
and underestimate the reliability of structures with fundamental period
much less than the mean pulse period of earthquake ground motions.
KW - Near-fault ground motion; strongest pulse energy; pulse occurrence probability; seismic reliability; inelastic SDOF systems
DO - 10.32604/sdhm.2019.05171