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Prediction equations for pulse duration of pulse-like ground motions (PLGMs)
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DOI：10.1007/s11803-026-2397-x.png)
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Abstract
En 中文
The velocity pulse duration of pulse-like ground motions (PLGMs) significantly influences the nonlinear seismic response of structures. Developing accurate pulse duration models is essential for seismic design and risk assessment. To our best knowledge, there is a lack of effective predictive models for this duration characteristic. Consequently, this study analyzes records of PLGMs from the NGA-West2 database. A predictive equation for pulse duration was developed using the random effects regression analysis method. This model incorporates moment magnitude (Mw), rupture distance (Rrup), average shear-wave velocity over the uppermost 30 m at the site (Vs30), depth to the top of rupture (Ztor), and the focal mechanism (Fm). Results indicate that pulse duration strongly depends on moment magnitude, while the effects of rupture distance and site conditions are comparatively minor. The focal mechanism also plays a significant role: strike-slip faults produce the longest durations, followed by oblique-reverse faults, and reverse faults yield the shortest. The proposed model provides reliable estimates of pulse duration for earthquakes with moment magnitudes ranging from Mw 5.7 to Mw 7.9.
Keywords:
recycled concrete
frame-shear wall
concealed bracings
shaking table test
nonlinear time-history response analysis
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