Research on Structure Vulnerability Expression Way Based on Seismic Motion Parameter

Abstract eng:
The probability of each damage grade of structure in given intensity is fitted continuously by the use of beta distribution function. According to the corresponding relation between intensity and seismic motion parameter, the beta probability density distribution of structure damage ratio and the probability of every damage grade in each acceleration peak value are calculated based on seismic peak as seismic motion parameter in logarithm interpolation way. Thus the tradition step distribution way of structure vulnerability which is expressed by intensity versus earthquake damage grade is converted to continuous distribution way expressed by seismic motion parameter compared to destruction ratio. The practical data showed that this transformed approach is feasible and provides the reference for earthquake damage prediction and earthquake economic loss evaluation.

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