Dual earthquake resistant frames

T. L. Sophocleous, M. C. Phocas

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

5 Citations (Scopus)


Structural control through energy dissipation systems has been increasingly implemented internationally in recent years and has proven to be a most promising strategy for the earthquake safety of structures. In extending the "classical" approach of the capacity design for earthquake structural resistance, the integration of passive damping devices within the structure aims at energy dissipation within specific structural zones. The present paper examines an alternative control system for achieving dynamic structural adaptability, which consists of an energy dissipation device and a cable bracing mechanism with a kinetic closed circuit, working only in tension. The closed bracing mechanism does not practically affect the initial stiffness of the system, i.e. the concept relies on two completely "separate" systems: a primary for the vertical- and wind loads and a secondary for the earthquake loads. An additional feature of the bracing-damper mechanism compared to conventionally passively controlled systems is the contribution of all bracing members to the energy dissipation during a loading cycle. Three "dual systems" with different configurations of the closed bracing mechanisms and damping devices are investigated in their dynamic behaviour, in the time-history range under actual earthquakes of the Greek-Mediterranean region. The study provides significant response comparisons of the dual systems, in respect to the stiffness of the hysteretic dampers, its effect on the base shear force and the maximum relative displacements of the systems and to the energy dissipation behaviour of the bracing-damper mechanism.

Original languageEnglish
Title of host publicationEarthquake Resistant Engineering Structures VII
Number of pages10
Publication statusPublished - 2009
Event7th International Conference on Earthquake Resistant Engineering Structures, ERES 2009 - , Cyprus
Duration: 11 May 200913 May 2009


Other7th International Conference on Earthquake Resistant Engineering Structures, ERES 2009


  • Dual systems
  • Hysteretic dampers
  • Passive control

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    Sophocleous, T. L., & Phocas, M. C. (2009). Dual earthquake resistant frames. In Earthquake Resistant Engineering Structures VII (Vol. 104, pp. 165-174) https://doi.org/10.2495/ERES090151