Journal of Structural Control 

About: Journal of Structural Control is an academic journal. The journal publishes majorly in the area(s): Control system & Control theory. It has an ISSN identifier of 1122-8385. Over the lifetime, 108 publications have been published receiving 1494 citations.

Efficiency of a simple approach to damper allocation in MDOF structures

Abstract: A simple approach to the design of optimal damper configurations has recently been suggested. This practical method is designated simplified sequential search algorithm (SSSA). Although some comparisons showed that the efficiency of the SSSA is similar to that of more sophisticated methods, a more comprehensive investigation is needed in order to gain more insight into its effectiveness. In this study, the SSSA is applied to several regular building models with different natural periods, numbers of storeys, levels of added damping, and different ground motions. Only one type of passive energy dissipation device is considered: linear viscous dampers. It is concluded that, in the case of regular buildings, the SSSA will generally lead to efficient damper configurations, particularly for low-to-medium-rise buildings and for a number of dampers equal to or greater than 1.5–2 times the number of storeys. The resulting damper configurations are found to be sensitive to ground motion characteristics, especially for low levels of supplemental damping. Copyright © 2002 John Wiley & Sons, Ltd.

The state-of-the-art of damage detection by vibration monitoring: the SIMCES experience

Abstract: A major contribution to the status of vibration monitoring has been delivered by the European Brite EuRam research project BE-3157, System Identification to Monitor Civil Engineering Structures (SIMCES). This paper gives a brief description of the project, the tests performed on bridge Z24 and the results obtained from these tests. The need for further research is indicated. Copyright © 2003 John Wiley & Sons, Ltd.

Passive and semi-active seismic response control of a cable-stayed bridge

Abstract: Effectiveness of passive and semi-active seismic response control on a cable-stayed bridge was studied by numerical analyses. An existing cable-stayed bridge which has fixed-hinge connections between deck and towers is modeled and its connections were replaced by isolation bearings and dampers. The isolation bearings are of elastic and hysteretic type. The dampers are of linear and variable type. The variable damper uses semi-active control that incorporates a pseudo-negative stiffness algorithm. A pseudo-negative stiffness hysteretic loop produced by the variable damper, combined with a positive stiffness curve of the deck-tower connections, creates nearly rigid–perfectly plastic force–deformation characteristics with a large damping ratio. The damping ratio for the main mode of the bridge for both passive and semi-active control was also calculated. Soil-structure interaction and three-dimensional effects on structural responses were studied. Copyright © 2002 John Wiley & Sons, Ltd.

Phase II Benchmark Control Problem for Seismic Response of Cable-Stayed Bridges

Abstract: This paper presents the problem definition for the second generation of benchmark structural control problems for cable-stayed bridges. The goal of this study is to provide a testbed for the development of strategies for the control of cable stayed-bridges. Based on detailed drawings of the Bill Emerson Memorial Bridge, a three-dimensional evaluation model has been developed to represent the complex behavior of the full-scale benchmark bridge. Phase II considers more complex structural behavior than phase I, including multi-support and transverse excitations. Evaluation criteria are presented for the design problem that are consistent with the goals of seismic response control of a cable-stayed bridge. Control constraints are also provided to ensure that the benchmark results are representative of a control implementation on the physical structure. Each participant in this benchmark bridge control study is given the task of defining, evaluating and reporting on their proposed control strategies. Participants should also evaluate the robust stability and performance of their resulting designs through simulation with an evaluation model which includes additional mass due to snow loads. The problem and a sample control design have been made available in the form of a set of MATLAB equations. Copyright © 2003 John Wiley & Sons, Ltd.

Application of pseudo-negative stiffness control to the benchmark cable-stayed bridge

Abstract: The effectiveness of a variable damper employing pseudo-negative stiffness control on benchmark cable-stayed bridges was studied. Combination of a pseudo-negative stiffness hysteretic loop produced by the variable damper plus elastic stiffness of the deck-tower connections produces a hysteretic loop that approaches rigid perfectly plastic force–deformation characteristics with a large damping ratio. The advantage is that sensors are required only at damper connections to measure relative displacements. Moreover, the small amount of sensors and simple algorithm reduce the source of errors and uncertainties. Comparisons are made between passive, pseudo-negative stiffness, and active control for the phase II benchmark bridge. The results of pseudo-negative stiffness control are significantly better than those of passive control and comparable to those of active control. Copyright © 2003 John Wiley & Sons, Ltd.