In violent earthquakes, ground motion is considered to change dramatically in the process of spatial propagation. Strong spatially varying exists near fault area, and it can cause large-span large stiffness structure be damaged. this paper, a typical long-span steel box arch bridge selected as an engineering case. order simulate variation accurately, records that sampled former earthquake are u...

ABSTRACT Fault zones are major sources of hazard for many populated regions around the world. Earthquakes still occur unanticipated, and research has started to observe fault properties with increasing spatial temporal resolution, having goal detecting signs stress accumulation strength weakening that may anticipate rupture. The common practice is monitoring source parameters retrieved from mea...

This paper aims to investigate the effects of motion duration on the structural seismic demands, seeking potential correlations between motion durations and structural responses at several seismic intensity levels. Three seismic intensity levels with 100years, 475years, and 2475years earthquake return periods (RPs) are first considered for correlation computations. Spectrally matched ground mot...

Ground faults in photovoltaic (PV) systems pose a fire and shock hazard. To mitigate these risks, AC-isolated, DC grounded PV systems in the United States use Ground Fault Protection Devices (GFPDs), e.g., fuses, to de-energize the PV system when there is a ground fault. Recently the effectiveness of these protection devices has come under question because multiple fires have started when groun...

Buckling restrained braces (BRBs) have a similar behavior under compression and tension loadings. Therefore, they can be applied as a favorable lateral load resisting system for structures. In the performance-based earthquake engineering (PBEE) framework, an intermediate variable called intensity measure (IM) links the seismic hazard analysis with the structural response analyses. An optimal IM...

[1] In a previous paper [Bouchon et al., 2001], we presented what we believe are strong indications of supershear rupture over parts of the faults of the 1999 Turkey earthquakes. These findings are based on near-fault recordings and modeling of the ground motion. We also showed that the supershear value inferred for the Izmit earthquake (the only event for which this velocity is well resolved) ...

The virtual earthquake approach to ground-motion prediction uses Green’s functions (GFs) determined from the ambient seismic field to predict long-period shaking from scenario earthquakes. The method requires accurate relative GF amplitudes between stations and among components; however, the amplitudes of ambient-field GFs are known to be subject to biases from uneven source distribution. We sh...