7 research outputs found
Mean first passage times of processes driven by white shot noise
The systems driven by white shot noise are analyzed based on mean first passage times. The shot noise has exponentially distributed jump heights. The the linkage between the results and the steady state probability density function of the process are presented
A practical method for optimum seismic design of friction wall dampers
Friction control systems have been widely used as one of the efficient and cost
effective solutions to control structural damage during strong earthquakes.
However, the height-wise distribution of slip loads can significantly affect the
seismic performance of the strengthened frames. In this study, a practical design
methodology is developed for more efficient design of friction wall dampers by
performing extensive nonlinear dynamic analyses on 3, 5, 10, 15, and 20-story RC
frames subjected to seven spectrum-compatible design earthquakes and five
different slip load distribution patterns. The results show that a uniform
cumulative distribution can provide considerably higher energy dissipation
capacity than the commonly used uniform slip load pattern. It is also proved that
for a set of design earthquakes, there is an optimum range for slip loads that is a
function of number of stories. Based on the results of this study, an empirical
equation is proposed to calculate a more efficient slip load distribution of friction
wall dampers for practical applications. The efficiency of the proposed method is
demonstrated through several design examples