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Evolution of Void Fabrics and Their Effects on Liquefaction Behaviors of Granular Soils: Insight from DEM-Clump Simulation
Publisher: American Society of Civil Engineers
Abstract: Previous studies have demonstrated that macroscopic liquefaction behavior is closely related to the evolution of the microstructure (fabric) of soils. Here we perform three-dimensional (3D) discrete-element method (DEM) ...
Evolution of Soil Fabrics toward Critical State for Granular Soils: A Comprehensive Investigation
Publisher: ASCE
Abstract: The critical-state theory (CST) serves as the foundation of modern soil mechanics and has gained widespread acceptance for explaining the behavior of granular materials. The classical CST does not address the fabric ...
Performance of On-Site Earthquake Early Warning System Using Strong-Motion Records from Recent Earthquakes
Publisher: American Society of Civil Engineers
Abstract: The method of on-site earthquake early warning was proposed in the past decade to enhance seismic preparedness and safety measures for areas close to the earthquake epicenter. The method leverages critical information ...
SS-XGBoost: A Machine Learning Framework for Predicting Newmark Sliding Displacements of Slopes
Publisher: ASCE
Abstract: Estimation of Newmark sliding displacement plays an important role for evaluating seismic stability of slopes. Current empirical models generally utilize predefined functional forms and relatively large model uncertainty ...
Effects of Strain History and Induced Anisotropy on Reliquefaction Resistance of Toyoura Sand
Publisher: ASCE
Abstract: Recent earthquake events have indicated that liquefaction histories can greatly affect the reliquefaction resistance of saturated sandy ground. This paper reports a fundamental experimental study of medium-dense/dense ...
Probing Fabric Evolution and Reliquefaction Resistance of Sands Using Discrete-Element Modeling
Publisher: ASCE
Abstract: Recent case histories have demonstrated that soil liquefaction can occur repeatedly at a site during a sequence of earthquake events. Field observations and laboratory tests imply that reliquefaction resistance can be ...
Major Earthquakes around Taipei and a Seismic Hazard Assessment with Monte Carlo Simulation
Publisher: American Society of Civil Engineers
Abstract: The region around Taiwan is known for high seismicity. Under the circumstances, seismic hazard assessments and proper earthquake-resistant designs are essential to the region. From a well-studied earthquake catalog, this ...
Discrete-Element Modeling of Cemented Granular Material Using Mixed-Mode Cohesive Zone Model
Publisher: ASCE
Abstract: This paper presents an energy-controlled fracture model to simulate mechanical behavior of cemented granular material (CGM). A modified mixed-mode cohesive zone model is developed to describe the damage behavior of the ...