Understanding strong ground motions in the near-fault areas is important for seismic risk assessment in densely populated areas. In the past, lack of information on strong ground motion for large and moderate earthquakes led to the use of mainly far field large and moderate earthquake records in equations for calculation of the strong ground motion parameters. In this article, we collected and ...

We perform 2-D simulations of earthquakes on rough faults in media with random heterogeneities (with von Karman distribution) to study the effects of geometric and material heterogeneity on the rupture process and resulting high-frequency ground motions in the near-fault region (out to ∼20 km). Variations in slip and rupture velocity can arise from material heterogeneity alone but are dominantl...

The use of precast post-tensioned segmental (PPS) piers is growing in the bridge industry, particularly Accelerated Bridge Construction (ABC). To increase their high-seismicity regions, this study focuses on seismic performance PPS under pulse-like near-field earthquakes. Two ensembles 40 ground motions and 44 far-field along with three various heights are used a series incremental dynamic anal...

Based on an innovative high-speed railway simply supported bridge (HSRSSB) model, the potential influence of near-fault pulse-type ground motions HSRSSB is analyzed. Eighty-five original records such are imposed simulation model. The dynamic responses calculated, including girder displacement, rail pier bending moment, bearing deformation, and residual displacement. Linear regression analysis r...

This study collects recorded ground motions from the near-source region of large earthquakes and considers to what extent this historic record can inform expectations of future ground motions at similar sites. The distribution of observed peak ground acceleration (PGA) is well approximated by the lognormal distribution, and we expect the observed distribution to remain unchanged with the additi...

This paper investigates the collapse risk of seismically isolated buildings that are designed by procedures ASCE/SEI 7-16 standard for sites within 5 km active fault controls hazard. The study is based on six-story perimeter frame with special concentrically braced frames a location in California. seismic isolation systems considered this comprised either: (i) triple friction pendulum bearings ...

Abstract The 2016 Kumamoto earthquakes caused severe damage centering on the Mashiki residential area. velocity waveforms at station KMMH16 in Mashiki, during M 7.3 mainshock, show large pulses. We found that may be result of strong westward pulse. question raised is how near-fault ground motions with pulse were generated mainshock. focus characterized source model Strong Motion Generation Area...

We study the ground motion simulations based on three finite-source models for the 2007 Mw6.6 Niigata Chuetsu-oki, Japan, earthquake in order to discuss the performance of the input ground motion estimations for the near-field seismic hazard analysis. The three models include a kinematic source inverted from the regional accelerations, a dynamic source on a planar fault with three asperities in...