STOCHASTIC SEISMIC RESPONSE ANALYSIS AND RELIABILITY EVALUATION OF HYSTERETIC STRUCTURES

摘要

Stochastic seismic response and reliability evaluation of hysteretic structures are investigated. Practical engineering structures usually exhibit strong nonlinearity, especially hysteretic properties, under severe earthquakes. At the same time, large uncertainties are usually involved in earthquakes. Therefore, stochastic seismic response analysis and reliability evaluation of engineering structures has long been one of the key problems in earthquake engineering. Nonetheless, rational approaches tackling the difficult problem have not been reached to date. In the past few years, a family of probability density evolution method, through which the instantaneous probability density function and the extreme value distribution of the structural responses could be captured, has been developed. In the present paper, using the probability density evolution method together with a physical-background-based ground motion model, stochastic seismic response analysis is carried out. Further, dynamic reliability is evaluated through the extreme value distribution.