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RISDiscrete-Element Analysis for Compaction-Induced Stiffness Variation of Ballast Aggregate in Large-Scale Triaxial Testing
Publisher: American Society of Civil Engineers
Abstract: Large-scale triaxial tests are popular for evaluating the mechanical properties of railroad ballast. The literature shows that different compaction methods have been used to prepare the samples. This research investigates ...
Integrating Railroad Crossing Blockage Information in First Responder Dispatching Route Planning
Publisher: ASCE
Abstract: Finding effective routes is critical to support the decision-making of first responders to save lives in emergency and accident situations. Effective routing planning requires accurate traffic information including railroad ...
Investigating the Cushion Effect of Using Pebble Gravel in Bridge Foundations through Laboratory Cyclic Direct Shear Tests
Publisher: ASCE
Abstract: Recently, isolated foundations with cushions have gained more attention in bridge design, especially for cross-sea bridges in deep water 50 meters or more in depth. This foundation has become a good choice for bridges ...
Numerical Study of Suspended Solids Concentration in Drainage Pipes with Different Inflow Patterns
Publisher: American Society of Civil Engineers
Abstract: The concentration change of fine suspended solids along a sewage pipe can be influenced by different water inflow patterns, which may cause water quality issues and affect the maintenance operation on sediment management. ...
Performance of Triangular Aperture Geogrid-Reinforced Base Courses over Weak Subgrade under Cyclic Loading
Publisher: American Society of Civil Engineers
Abstract: Geogrid (uniaxial or biaxial) is one type of geosynthetics that has been successfully used in slopes, walls, roads, and other applications. The main application of biaxial geogrid is to stabilize soft subgrade and reinforce ...
Numerical Analysis of Equivalence Ratio Fluctuations in a Partially Premixed Gas Turbine Combustor Using Large Eddy Simulations
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: In the present work, the fluctuations of equivalence ratio in the PRECCINSTA combustor are investigated via large eddy simulations (LES). Four isothermal flow cases with different combinations of global equivalence ratios ...
Experimental Study on Fatigue Behavior of Cracked Rectangular Hollow-Section Steel Beams Repaired with Prestressed CFRP Plates
Publisher: American Society of Civil Engineers
Abstract: The bending fatigue test results on cracked rectangular hollow section (RHS) steel beams repaired with prestressed carbon fiber-reinforced polymer (CFRP) plates are presented. The steel beams were artificially cut on the ...
Micromechanical Particle Interactions in Railway Ballast through DEM Simulations of Direct Shear Tests
Publisher: American Society of Civil Engineers
Abstract: Particle shape properties can significantly affect the load response behavior and field performance of the uniformly graded ballast layer in railway track structures. Particle contact and the related micromechanical behavior ...
Cost Constitution and Parameter Analysis of Bridge Engineering Computation Period by Considering Concerns of Decision Makers
Publisher: American Society of Civil Engineers
Abstract: This study discusses the objectives of state-level and enterprise-level positions of decision makers in bridge engineering decision problems and their hierarchical structures. Based on the aforementioned factors, cost ...
Micromechanical Particle Interactions in Railway Ballast through DEM Simulations of Direct Shear Tests
Publisher: American Society of Civil Engineers
Abstract: Particle shape properties can significantly affect the load response behavior and field performance of the uniformly graded ballast layer in railway track structures. Particle contact and the related micromechanical behavior ...