نتایج جستجو برای: near fault ground motion
تعداد نتایج: 650229 فیلتر نتایج به سال:
ABSTRACT Empirical ground-motion prediction equations (GMPEs) lack a sufficient number of measurements at near-source distances. Seismologists strive to supplement the missing data by physics-based strong modeling. Here, we build database ~3000 dynamic rupture scenarios, assuming vertical strike-slip fault 36 × 20 km embedded in 1D layered elastic medium and linear slip-weakening friction with ...
The 2014 Ms 6.5 (Mw6.1) Ludian earthquake occurred in the eastern Sichuan-Yunnan border region of western China. This earthquake caused much more severe engineering damage than the usual earthquakes with the same magnitude in China. The National Strong Motion Network obtained large set of ground motion recordings during the earthquake. To investigate the engineering interested characteristics o...
Direct body waves and fundamental surface waves are calculated for a credible, hypothetical great earthquake on the San Andreas Fault. The prototype event assumed is the Fort Tejon earthquake of January 9, 1857. Amplitudes and durations of long-period ground motion ( T > 1 sec) are found for a receiver in downtown Los Angeles. Calculations are carried out for various epicenters, dislocation pro...
This paper employs one-dimensional numerical ground response analysis models to investigate seismic response of shallow cohesive and non-cohesive soil deposits on vertical propagation of horizontal shear waves. Soil response is modelled by traditional equivalent-linear (EL) frequency-domain analysis using DEEPSOIL software and nonlinear (NL) time-domain analysis using OPENSEES software. The ana...
This comment addresses a discrepancy between the results obtained by Wald et al. (1990) and Frankel and Wennerberg (1989) concerning seismic slip during the 1987 Superstition Hills earthquake (M s 6.6) in southern California (Fig. I). Both studies used strong-motion records to locate subevents that produced the high-frequency (__> 0.5 Hz) strong ground motions for this earthquake. Wald et al. (...
The western region of China is rich in hydropower resources and characterized by unique geological conditions. For the construction or planned high dams this region, different types cover layers are formed due to special structures, most which located seismic intensity zones. This study focuses on four site conditions: hard ground, medium–hard medium–soft weak ground. By simulating dynamic resp...
To investigate the architecture of transpressional deformation and its long-term relationship to plate motion in southern California, we have studied the deformation pattern and structural geometry of orogeny within the San Andreas fault system. The San Bernardino Mountains have formed recently at the hub of several active structures that intersect the San Andreas fault east of Los Angeles. Thi...
We perform dynamic simulations of thrust and normal faults over multiple earthquake cycles. Our goal is to explore effects of asymmetric fault geometry on the long-term seismicity and dynamics of dipping faults. A dynamic finite-element method is used to model the interseismic and coseismic processes, with a dynamic relaxation technique for the former. The faults are loaded by stable sliding al...
Teed lines are widely used in rural power networks in China. The paper theoretically analyzes the voltages and currents when a single line-to-ground fault occurs, constructs a new mathematical model for fault location on the teed lines, performs corresponding MATLAB simulations. Simulation results show that currents near the source (bus M) are almost independent of fault positions and fault res...
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