Reliability of MDOF-systems with hysteretic devices

摘要

Hysteretic devices (Hydes) such as friction based devices to reduce excessive vibrations in buildings have been used successfully for new buildings and the upgrading of RC/frames as well as other type of structures against earthquake effects. This is due to the fact that such systems can limit the story drift below the quasi-elastic limit. For the purpose of controlling vibrational characteristics, the frictional devices are assembled throughout the structure. As in a well designed system the input energy due to strong earthquakes is largely dissipated by the friction devices during only a few inelastic cycles, the remaining structure stays elastic. The stochastic struc- tural analysis is based on Monte--Carlo simulation and controlled Monte-Carlo simulation procedures, i.e. ‘double and clump' as a further development to assess the reliability of complex structural systems. For the mechanical modeling the FE-method is utilized. In a numerical example (three-story structure ) the effect of the fric- tional devices (two--dimensional ), under bi--directional earthquake loading, on the structural reliability is shown.