Dual structure configuration for earthquake resistance

T. L. Sophocleous, M. C. Phocas

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

Currently, research on seismic passive control systems concentrates on the response behavior when damping devices attached on bracings are placed within frames. The proposed concept of Adaptable Dual Control Systems (ADCS) consists of a hysteretic damper and tendons, formed in a closed circuit. ADCS are based on a dual function of the component members, resulting in two practically uncoupled systems. The primary frame is responsible for the normal vertical and horizontal forces, while the closed bracing-damper mechanism, for the earthquake forces and the necessary energy dissipation. The bracing members that are fixed at the bottom of the columns are free to move when the kinetic mechanism is activated by the ground excitation. The configuration of the ADCS is mostly critical since the bracing members' reactions on the primary frame are neutralized, for avoiding any coupling effects with the primary system. The relative displacement that is induced between the bracing members and the hysteretic damper is utilized for the necessary energy dissipation through the inelastic yielding of the steel damper plates. An example of ADCS design configuration was analytically investigated based on a simplified SDOF model. As the study results indicate, the control system may result to significant energy dissipation, when the design parameters, both geometry and mechanical properties, are predefined. The predominant parameters that characterize ADCS seismic behavior are verified in respect to their response behavior under ten selected time history earthquake records of the Greek-Mediterranean region.

Original languageEnglish
Title of host publicationProceedings of the 8th International Conference on Structural Dynamics, EURODYN 2011
PublisherUniversity of Southampton, Institute of Sound Vibration and Research
Pages1858-1864
Number of pages7
ISBN (Electronic)9789076019314
Publication statusPublished - 2011
Event8th International Conference on Structural Dynamics, EURODYN 2011 - Leuven, Belgium
Duration: 4 Jul 20116 Jul 2011

Other

Other8th International Conference on Structural Dynamics, EURODYN 2011
CountryBelgium
CityLeuven
Period4/07/116/07/11

Keywords

  • Hysteretic dampers
  • Kinetic mechanisms
  • Passive seismic control
  • Tendon bracings

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  • Cite this

    Sophocleous, T. L., & Phocas, M. C. (2011). Dual structure configuration for earthquake resistance. In Proceedings of the 8th International Conference on Structural Dynamics, EURODYN 2011 (pp. 1858-1864). University of Southampton, Institute of Sound Vibration and Research.