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RISOptimal Design of Seismic Protective Devices for Highway Bridges Using Performance-Based Methodology and Multiobjective Genetic Optimization
Publisher: American Society of Civil Engineers
Abstract: This study investigates the effectiveness and optimal design of protective devices for the seismic protection of highway bridges. The Painter Street Overcrossing is seismically redesigned with protective devices. Component-level ...
Bounded Finite-Time Coordinated Attitude Control via Output Feedback for Spacecraft Formation
Publisher: American Society of Civil Engineers
Abstract: In this paper, finite-time output feedback coordinated attitude control for spacecraft formation subject to input saturation is investigated. More specifically, a finite-time observer is first designed to remove the ...
Simulation of the Strongly Swirling Aerodynamic Field in a Vortex Combustor
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This paper presents the simulation of the strongly swirling aerodynamic field in a coal-fired vortex combustor (VC) recently developed for commercial heating applications. A new version of algebraic ...
Seismic Response Analysis of a Highway Overcrossing Equipped with Elastomeric Bearings and Fluid Dampers
Publisher: American Society of Civil Engineers
Abstract: This paper presents a case study on the seismic response of a recently constructed freeway overcrossing located in southern California, which is equipped with elastomeric bearings and fluid dampers at its end abutments. ...
Rocking Response of Anchored Blocks under Pulse-Type Motions
Publisher: American Society of Civil Engineers
Abstract: This paper examines the transient rocking response of anchored blocks subjected to physically realizable horizontal pulse-type motion. Restrainers with elastic-brittle and elastic-plastic behavior are considered. Under ...
Rocking Response of Free-Standing Blocks under Cycloidal Pulses
Publisher: American Society of Civil Engineers
Abstract: This paper examines in depth the transient rocking response of free-standing rigid blocks subjected to physically realizable trigonometric pulses. First, the expressions for the dynamic horizontal and vertical reactions ...
Uncertainty Quantification and Error Propagation Principle of Structural Flexibility with Time-Varying Dynamic Properties
Publisher: American Society of Civil Engineers
Abstract: The investigation of the time-varying properties of vehicle-bridge interaction (VBI) systems has gained much attention in recent years. Use the moving vehicle-induced time-varying dynamic properties for rapid flexibility ...
Stabilization/Solidification of High Mercury Wastes with Reactivated Carbon
Publisher: American Society of Civil Engineers
Abstract: This paper presents the study results for a novel stabilization/solidification (S/S) process for high mercury wastes (Hg >260 ppm). In this study, a low-cost powder reactivated carbon (PAC) was used to stabilize mercury ...
Dimensional Analysis of Inelastic Structures with Negative Stiffness and Supplemental Damping Devices
Publisher: American Society of Civil Engineers
Structural Characterization of Modern Highway Overcrossings—Case Study
Publisher: American Society of Civil Engineers
Abstract: This paper revisits the mechanical characterization of the main substructure elements of highway overcrossings in an effort to build a more balanced methodology to compute the earthquake response of seismically protected ...