Abstract Structural damping is often empirically rate-independent wherein the dissipative part of stress depends on history deformation but not its rate change. Hysteresis models are popular for dissipation; and a hysteresis model Bouc-Wen model. If such hysteretic dissipation incorporated in refined finite element model, then involves usual structural dynamics equations along with nonlinear no...

-The performance of fuzzy logic (FLC) and PID controllers optimized by particle swarm optimization (PSO) for semi-active suspension system using magneto-rheological (MR) damper are investigated. MR damper is an intelligent damper filled with particle magnetic polarizable and suspended into a liquid form. The Bouc-Wen model of MR damper is used to determine the required damping force based on fo...

Abstract Accurate modeling of material behavior is very critical for the success magnetorheological elastomer-based semi-active control device. The property elastomer sensitive to frequency, magnetic field and input strain. Additionally, these properties are unique a particular combination matrix filler loading. An experimental-based characterization approach costly time consuming as it demands...

Base-isolated structures achieve superior seismic performance but with the cost of large deformation base floor, which possibly causes superstructure collapse during severe earthquakes. Hence, it is great interest to develop hybrid isolation systems that can reduce and simultaneously improve superstructure’s performance. Recently, several using inerter-based dampers have emerged; however, nonli...

• 1st investigation on the effect of multi-axis seismic excitation bidirectional sliding components. Evaluates ASCE 43-05 and 4-16 nuclear standards for displacement. different intensity measures response During an earthquake, equipment left unanchored in a facility can slide interact with safety-critical systems components, posing safety risk to facility. However, computing especially two dire...

Structures joined by lap-joints can present complex nonlinear dynamic behavior as a function of the stress to which lap-joint is subjected, including contact stiffness variations and softening, along with hysteresis effects related frictional dissipation at interface. Considering applications where use non-parametric models that depend only on input output data required, this work proposes deta...

Using a description of the Levin-Wen model excitations in terms Wilson lines, we compute degeneracy energy levels for any input anyon theory and trivalent graph embedded on (orientable) compact surface. This result allows one to obtain finite-size finite-temperature partition function show that there are no thermal phase transitions.

Motion Control of Smart Material Based Actuators: Modeling, Controller Design and Experimental Evaluation Sining Liu, Ph.D. Concordia University, 2013 Smart material based actuators, such as piezoelectric, magnetostrictive, and shape memory alloy actuators, are known to exhibit hysteresis e ects. When the smart actuators are preceded with plants, such non-smooth nonlinearities usually lead to p...

In this paper, several variants of Differential Evolution, Particle Swarm Optimization and Genetic Algorithms are employed for the identification of a BoucWen hysteretic system that represents a full-scale bolted-welded steel connection. The purpose of this work is to assess their comparative performance in a highly nonlinear identification problem. Interesting results are produced that reveal ...