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RISRule-Based Control Algorithm for Active Tuned Mass Dampers
Publisher: American Society of Civil Engineers
Abstract: A rule-based control algorithm for active tuned mass dampers (TMDs) is proposed. First, perturbation solutions of the linear quadratic regulator (LQR) feedback gains for the active TMD system are derived. Using these ...
Tuned Mass Dampers for Structures with Bilinear Hysteresis
Publisher: American Society of Civil Engineers
Abstract: A design method of tuned mass dampers (TMDs) for structures with bilinear hysteresis subject to harmonic excitation is proposed. Conventional TMDs fail to control a bilinear structure as the equivalent natural frequency ...
Simultaneous Optimal Distribution of Lateral and Longitudinal Tire Forces for the Model Following Control
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This paper presents a proposed optimum tire force distribution method in order to optimize tire usage and find out how the tires should share longitudinal and lateral forces to achieve a ...
Active Reduction of Noise by Additional Noise Source and Its Limit
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This paper describes further investigations of an active noise control system in which an additional sound source is set close to the primary (noise) source. Successful application of this ...
Damage Analysis of Hanshin Expressway Viaducts during 1995 Kobe Earthquake. I: Residual Inclination of Reinforced Concrete Piers
Publisher: American Society of Civil Engineers
Abstract: The damage suffered by elevated viaducts of the Hanshin Expressway Kobe Route during the 1995 Kobe earthquake is described with emphasis on reinforced concrete (RC) piers. Although many piers were severely damaged, it is ...
Damage Analysis of Hanshin Expressway Viaducts during 1995 Kobe Earthquake. II: Damage Mode of Single Reinforced Concrete Piers
Publisher: American Society of Civil Engineers
Abstract: The damage mode that single reinforced concrete (RC) piers of the Hanshin Expressway Kobe Route suffered during the 1995 Kobe earthquake is discussed. On the Kobe Route, many single RC piers suffered from flexural mode ...
Damage Analysis of Hanshin Expressway Viaducts during 1995 Kobe Earthquake. III: Three-Span Continuous Girder Bridges
Publisher: American Society of Civil Engineers
Abstract: Almost all the single reinforced concrete (RC) piers from P35 to P350 received consistently severe damage, considering the large residual inclination of piers included in earthquake-induced severe damage. However, some of ...
Control of Wind-Induced Self-Excited Oscillations by Transfer of Internal Energy to Higher Modes of Vibration. I: Analysis in Two Degrees of Freedom
Publisher: American Society of Civil Engineers
Abstract: This paper and its companion paper present a new remedy to control wind-induced self-excited oscillation of long and flexible structures with low-internal damping, such as stay cables in cable-stayed bridges. A simple ...
Control of Wind-Induced Self-Excited Oscillations by Transfer of Internal Energy to Higher Modes of Vibration. II: Application to Taut Cables
Publisher: American Society of Civil Engineers
Abstract: In Part I of this paper, a theoretical basis is presented using a two-degrees-of-freedom model. In this second part of the study, the passive control and the two types of semiactive controls introduced in Part I are examined ...
Constitutive Model of High-Damping Rubber Materials
Publisher: American Society of Civil Engineers
Abstract: A mathematical model of high-damping rubber materials is developed. First the material experiments necessary for modeling are systematically conducted. Then, on the basis of the results of the material experiments, a ...