Summary This study proposes an improved energy‐based approach for quantitative classification of velocity‐pulse‐like ground motions. The pulse amplitude is determined, in its value and time location, by the half‐cycle having largest seismic energy. After conducting statistical analyses, a newly‐determined threshold level selecting pulse‐like motions derived; then what followed comparison analysis three pulse‐detecting schemes, one using wavelet analysis, other two energy concept. It believed...

Abstract The slip model for the 2011 M w 5.6 Prague, Oklahoma, earthquake is inferred using a linear least squares methodology. Waveforms of six aftershocks recorded at 21 regional stations are used as empirical Green's functions (EGFs). solution indicates two large patches: one located around hypocenter with depth range 3–5.5 km; other to southwest epicenter from 7.5 9.5 km. total moment estimated 3.37 × 10 24 dyne cm (M 5.65). peak and average stress drop source 70 90 bars, respectively,...

Research Article| September 18, 2018 A Possible Mechanism of Reservoir‐Induced Earthquakes in the Three Gorges Reservoir, Central China Lifen Zhang; Zhang aKey Laboratory Earthquake Geodesy, Institute Seismology, Administration, Wuhan 430071, Search for other works by this author on: GSW Google Scholar Jinggang Li; Li Xiaodan Sun; Sun bMOE Key High‐Speed Railway Engineering, Southwest Jiaotong University, 111‐15 Beiyiduan, Erhuan Road, Chengdu 610031, China, sunxd@swjtu.edu.cn Wulin Liao;...

Abstract Rainstorm is one of the global meteorological disasters that threaten safety transportation infrastructure and connectivity system. Aiming to support resilience assessment in three representative regions: Sichuan–Chongqing, Yangtze River Delta, Beijing-Tianjin-Hebei-Shandong, rainfall data over 40 years regions are collected, temporal distribution analyzed. Prediction equations established. For purpose this, probabilistic density function (PDF) assigned by fitting frequency...

Three broadband simulation methods are used to generate synthetic ground motions for the 2011 Mineral, Virginia, earthquake and compare with observed motions. The include a physics‐based model by Hartzell et al. (1999, 2005), stochastic source‐based Boore (2009), site‐based Rezaeian Der Kiureghian (2010, 2012). ground‐motion dataset consists of 40 stations within 600 km epicenter. Several metrics validate simulations: (1) overall bias response spectra Fourier (from 0.1 10 Hz); (2) spatial...

Push plate test is a powerful tool to evaluate the interfacial bond performance of China railway track structure type‐II slab ballastless (CRTS II SBTS). However, there still lack theoretical explanation push test. In this paper, linear proportional distribution method proposed in terms series analytical formulas describe force‐displacement variation CRTS SBTS different damage stages horizontal The relationship established by agrees well with that observed full‐scale then simulated, which...

Abstract Earthquake ground‐motion recordings are scarce in the central and eastern United States (CEUS) for large‐magnitude events at close distances. We use two different simulation approaches, a deterministic physics‐based method site‐based stochastic method, to simulate ground motions over wide range of magnitudes. Drawing on previous results modeling from 2011 M w  5.8 Mineral, Virginia, earthquake using 2001  7.6 Bhuj, India, as tectonic analog large magnitude CEUS event, we able...

Research Article| October 02, 2018 Estimation of Ground‐Motion Variability in the Central and Eastern United States Using Deterministic Physics‐Based Synthetics Xiaodan Sun; Sun aMOE Key Laboratory High‐Speed Railway Engineering, Southwest Jiaotong University, 111‐15 Beiyiduan, Erhuan Road, Chengdu 610031, China, sunxd@swjtu.edu.cn Search for other works by this author on: GSW Google Scholar Brandon Clayton; Clayton bU.S. Geological Survey, Denver Federal Center, P.O. Box 25046, MS 966,...

During the running of a high‐speed train, wheel may bounce on rail due to track irregularity. The could generate vertical impact, leading initiation and expansion delamination between layers structure. In this paper, evolution interfacial damage subjected impact is simulated using finite element analysis (FEA). FEA, bilinear cohesive zone model (CZM) adopted simulate interface slab CA mortar layer. For different levels energy, contact force, deformation, absorbed area damage, are calculated...

Purpose The smoothness of the high-speed railway (HSR) on bridge may exceed allowable standard when an earthquake causes vibrations for HSR bridges, which threaten safety running trains. Indeed, few studies have evaluated exceeding probability rail displacement standard. purposes this article are to provide a method investigating HSRs under seismic excitation and calculate probability. Design/methodology/approach In order investigate different excitations, workflow analyzing based...

The spatial coherencies of ground motions are the key to establishing multi-support excitation for large-dimension structures. Most existing models were established based on recorded at dense observation arrays which barely show any detailed information focal mechanism. However, in near field, dominated by source, and so motions. In this paper, a deterministic physics-based method was used simulate field various mechanism scenarios. simulated calculated. Loh coherency model fit variation...