EARTHQUAKE RESISTANT PERFORMANCE OF REINFORCEDCONCRETE FRAME WITH ENERGY DISSIPATION DEVICES

摘要

The paper presents that energy dissipation devices (damage fuses) in its reinforced concrete (RC) framecan upgrade the ability to dissipate the energy created by earthquake excitations. It also presents thatthose analysis models of RC frame with damage fuses effectively demonstrate the restoring forcecharacteristics obtained from experimental results of horizontal loading.In case damage fuses are applied to RC frame, it should be taken into consideration that the behavior suchas cracking of attachment members and flexural yielding of reinforcing bars can reduce the effect ofseismic response control. Therefore, the validity of performance evaluations of its frame with damagefuses and analysis models should be thoroughly examined.The frame contains two different types of damage fuses such as a stud (control-column) and a brace(control-brace). The control-column is an RC stud, which contains a low-yield-point-steel panel. Thecontrol-brace is either an oil-damper brace or an unbonded (buckling-restrained) low-yield-point-steelbrace.Static and dynamic loading tests of a one-storey RC frame model with damage fuses are conducted. Next,an analysis model of an RC frame with damage fuses is formulated. Subsequently, non-lineardisplacement analyses are conducted. The findings from testing and analyses are as follows:(1) In the region of assumed deformations under small to large earthquake intensity, applying damagefuses is substantially able to improve the energy dissipation ability of an RC frame.(2) Prior to flexural yielding of reinforcing bars, the restoring force characteristics of an RC frame withdamage fuses display a great ability of energy dissipation showing spindle-shape loops.