Seismic Behaviour of Innovative Energy Dissipation Systems Fuseis 1-1

Abstract eng:
After strong earthquakes conventional frames used worldwide in multi - storey steel buildings (e.g. Moment resisting, Concentric/Eccentric braced frames) are not well positioned according to reparability. It is therefore advisable to develop structural systems that are simple to repair, i.e. to introduce the reparability as a new property. Two innovative systems for seismic resistant steel frames incorporated with dissipative fuses were developed within the European Research Program “FUSEIS”. The FUSEIS systems are able to dissipate energy by means of inelastic deformations in the fuses and combine ductility and architectural transparency with stiffness. In case of strong earthquakes damage concentrates only in the fuses which are exchangeable. Repair work after such an event, if needed, is limited only to replacing the fuses. Experimental and numerical investigations were performed to study the response of the FUSEIS system. The first system, FUSEIS1, resembles a shear resistance wall and is composed of two closely spaced strong columns, rigidly connected to multiple beams. The beams run from column to column, FUSEIS 1-1, or alternatively are interrupted and connected by short pins, FUSEIS 12. In the second system, FUSEIS2, the devices are made by introducing a discontinuity on the composite beams of a moment resisting frame and connecting the two parts through steel plates. This study presents the experimental research on overall frames with FUSEIS1-1 and numerical models calibrated on the experimental results. These models provided the design rules and verified the good seismic performance of building frames with FUSEIS1-1.

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