In-situ condition assessment of seismic fluid dampers: experimental studies and challenges

This paper addresses the problem of estimating in situ the force output of fluid dampers when installed in structures for vibration reduction due to seismic and wind excitations. The paper first presents results from a comprehensive experimental program on medium and large-size fluid dampers in an effort to extract their force output during cyclic loading by simply measuring strains on the damper housing and the end-spacer of the damper. …