A model for evaluating structural damage in reinforced concrete structures underearthquake ground motions is proposed. Damage is expressed as a linear combinationof the maximum deformation and the effect of repeated cyclic loadings. Available static(monotonic) and dynamic (cyclic) test data were analyzed to evaluate the statistics ofthe appropriate parameters of the proposed model. Accordingly, a method of nonlinearrandom vibration technique was developed for obtaining the response statistics necessaryfor damage assessment.From an extensive damage analysis of various reinforced concrete buildings, anintensity scale was derived to describe the potential destructiveness of ground motion.It is a simple function of the rms acceleration and strong-motion duration. The proposeddamage model is calibrated with observed building damages from past earthquakes.,. On this basis, a design procedure is developed accordingly to limit the potentialstructural damage to a tolerable level.
展开▼
