ENERGY INPUT AND DISSIPATION BEHAVIOUR OF STRUCTURES WITH HYSTERETIC DAMPERS

✍ Scribed by NAKASHIMA, M.; SABURI, K.; TSUJI, B.

• Publisher: John Wiley and Sons
• Year: 1996
• Tongue: English
• Weight: 885 KB
• Volume: 25
• Category: Article
• ISSN: 0098-8847
• DOI: 10.1002/(sici)1096-9845(199605)25:5<483::aid-eqe564>3.0.co;2-k

✦ Synopsis

This paper presents qualitative investigations on the energy behaviour of structures into which hysteretic dampers are incorporated. Emphasis was given to the ratio of the structural stiffness after the yielding of hysteretic dampers to the initial elastic stiffness, with a premise that this ratio, termed a in this study, tends to be large for structures with hysteretic dampers. Structures concerned were represented by discrete spring-mass systems having bilinear restoring force behaviour, in which the second stiffness relative to the initial stiffness is a. It was found that with the increase of a the total input energy tends to increase, but the increase is confined to a narrow range of natural periods. Both the total input energy and hysteretic energy were found to become less sensitive to the yield strength with the increase of a. A simple formula was also proposed to estimate the maximum deformation given the knowledge of the hysteretic energy. Analysis of MDOF systems revealed that, even when a is large, the total input energy and hysteretic energy for MDOF systems are approximately the same as those of the equivalent SDOF system, and the hysteretic energy can be distributed uniformly over the stories if a is large.