Abstract: The intelligent renewal of our aging civil infrastructure systems includes efficient use of smart materials and structures. In this viewpoint some examples of projects funded by the National Science Foundation on smart ...

Abstract: Traditional tolerance analyses such as the worst case methods and the statistical methods are applicable to rigid body assemblies. However, for flexible sheet metal assemblies, the traditional ...

Abstract: Two aseismic hybrid control systems are proposed for protecting building structures against strong earthquakes. The hybrid control system consists of a base‐isolation system connected to either a passive or active mass ...

Abstract: Optimal control algorithms usually involve a state feedback including displacements and velocities. For control of building structures subjected to strong earthquake ground motions, it is much easier to measure the ...

Abstract: Instantaneous optimal control for nonlinear and inelastic systems is formulated incorporating the specific hysteretic model of the sytem. The resulting optimal control vector is obtained as a function of the total deformation, ...

Abstract: Recently, instantaneous optimal control algorithms were proposed and developed for applications to control of seismically excited linear, nonlinear, and hysteretic structural systems. In particular, these control algorithms ...

Abstract: It has been shown recently that a combined use of active and passive control systems, referred to as the hybrid control system, is more effective, beneficial, and practical, in some cases, for reducing the building response ...

Abstract: An investigation is made of the possible application of both the active tendon and active mass damper control systems to buildings excited by strong earthquakes. The effectiveness of both active control systems as measured ...