Ozaki, Kawai, Tanaka, Okada and Kanno 2010
The authors determined the seismic performance of HDFFs for low rise housing units. Subjecting the HDFFs to statically loaded experiments tested their performance. Testing on other shaped fuse panels allowed for comparison between the seismic performance of the two.
System Concept
During a strong earthquake HDFFs are designed to move cyclically into plastic regions so that most of the energy is dissipated by the plastic deformation of the butterfly elements. Any severely damaged HDFF would be replaced after an earthquake. The multi-storied shear wall maximizes energy dissipation by large pull out forces induced by the overturning moments. However, energy absorption capacities are sacrificed for minimizing the damage to the shear wall to ensure the function of the rocking shear wall system.
Experimental Study, Results and Discussion
In comparison to the rectangular fuse panel with rectangular slits, the butterfly shape with rhomboid slits had a higher energy absorption capacity due to the plastic strains concentrated at the ends of the rectangular slits. The rectangular fuse panel also fractured before the butterfly shaped panel which had maximum deformations exceeding 10 mm. Both of these properties likely result from the large plastic zone of the butterfly panels. Overall, earthquake shaking was significantly reduced by the HDFFs and the proposed rocking shear wall system is likely to offer high seismic performance at a low construction cost and increased sustainability.
Reference
Ozaki, F., Kawai, Y., Tanaka, H., Okada, T., and Kanno, R. (2010). “Innovative Damage Control Systems Using Replaceable Energy Dissipating Steel Fuses for Cold-formed Steel Structures.” International Speciality Conference on Cold-Formed Steel Structures, 443–457.