MARTI and MRSD: Newly Developed Isolation-Damping Devices with Adaptive Hardening for Seismic Protection of Structures
In this paper, a summary of analytical and
experimental studies into the behavior of a new hysteretic damper,
designed for seismic protection of structures is presented. The Multidirectional
Torsional Hysteretic Damper (MRSD) is a patented
invention in which a symmetrical arrangement of identical cylindrical
steel cores is so configured as to yield in torsion while the structure
experiences planar movements due to earthquake shakings. The new
device has certain desirable properties. Notably, it is characterized by
a variable and controllable-via-design post-elastic stiffness. The
mentioned property is a result of MRSD’s kinematic configuration
which produces this geometric hardening, rather than being a
secondary large-displacement effect. Additionally, the new system is
capable of reaching high force and displacement capacities, shows
high levels of damping, and very stable cyclic response. The device
has gone through many stages of design refinement, multiple
prototype verification tests and development of design guide-lines
and computer codes to facilitate its implementation in practice.
Practicality of the new device, as offspring of an academic sphere, is
assured through extensive collaboration with industry in its final
design stages, prototyping and verification test programs.
[1] R. I. Skinner, W. H. Robinson, and G. H. McVerry, An Introduction to
Seismic Isolation. John Wiley & Sons, Chichester, England, 1993.
[2] J. M. Kelly, R. I. Skinner and A. J. Heine, “Mechanisms of Energy
Absorption in Special Devices for Use in Earthquake Resistant
Structures,” Bull. N.Z. Soc. Earthquake Eng., pp. 63-88, 5, 1972.
[3] R. I. Skinner, J. M. Kelly, and A. J. Heine, “Hysteretic dampers for
earthquake-resistant structures,” Earthquake Engineering and Structural
Dynamics, pp. 287-296, 3, 1974.
[4] C. Casarotti, Bridge isolation and dissipation devices: state of the art
review in bridge isolation, structural seismic response and modeling of
modern seismic isolation and dissipation devices. ROSE School, MSc
Dissertation, 2004.
[5] A. Salem Milani, Torsional hysteretic damper for seismic protection of
structures. Doctoral Dissertation, Middle East Technical University,
2014.
[1] R. I. Skinner, W. H. Robinson, and G. H. McVerry, An Introduction to
Seismic Isolation. John Wiley & Sons, Chichester, England, 1993.
[2] J. M. Kelly, R. I. Skinner and A. J. Heine, “Mechanisms of Energy
Absorption in Special Devices for Use in Earthquake Resistant
Structures,” Bull. N.Z. Soc. Earthquake Eng., pp. 63-88, 5, 1972.
[3] R. I. Skinner, J. M. Kelly, and A. J. Heine, “Hysteretic dampers for
earthquake-resistant structures,” Earthquake Engineering and Structural
Dynamics, pp. 287-296, 3, 1974.
[4] C. Casarotti, Bridge isolation and dissipation devices: state of the art
review in bridge isolation, structural seismic response and modeling of
modern seismic isolation and dissipation devices. ROSE School, MSc
Dissertation, 2004.
[5] A. Salem Milani, Torsional hysteretic damper for seismic protection of
structures. Doctoral Dissertation, Middle East Technical University,
2014.
@article{"International Journal of Architectural, Civil and Construction Sciences:70127", author = "Murat Dicleli and Ali Salem Milani", title = "MARTI and MRSD: Newly Developed Isolation-Damping Devices with Adaptive Hardening for Seismic Protection of Structures", abstract = "In this paper, a summary of analytical and
experimental studies into the behavior of a new hysteretic damper,
designed for seismic protection of structures is presented. The Multidirectional
Torsional Hysteretic Damper (MRSD) is a patented
invention in which a symmetrical arrangement of identical cylindrical
steel cores is so configured as to yield in torsion while the structure
experiences planar movements due to earthquake shakings. The new
device has certain desirable properties. Notably, it is characterized by
a variable and controllable-via-design post-elastic stiffness. The
mentioned property is a result of MRSD’s kinematic configuration
which produces this geometric hardening, rather than being a
secondary large-displacement effect. Additionally, the new system is
capable of reaching high force and displacement capacities, shows
high levels of damping, and very stable cyclic response. The device
has gone through many stages of design refinement, multiple
prototype verification tests and development of design guide-lines
and computer codes to facilitate its implementation in practice.
Practicality of the new device, as offspring of an academic sphere, is
assured through extensive collaboration with industry in its final
design stages, prototyping and verification test programs.", keywords = "Seismic, isolation, damper, adaptive stiffness.", volume = "9", number = "6", pages = "702-5", }