Performance Based Earthquake Design of Structures Using Vulnerability Criteria

Abstract eng:
This work presents a general methodology for the seismic design of structures in the framework of Performance Based Earthquake Engineering (PBEE), using probabilistic vulnerability criteria. Vulnerability constraints are introduced through target limit state probabilities of exceeding various predefined performance levels associated with a given seismic intensity. The methodology is derived on the basis of non-linear Static Pushover analysis (SPO) as well as on Incremental Dynamic Analysis (IDA) for the evaluation of the non-linear dynamic structural responses and applied to a seven storey reinforced concrete building. The Engineering Demand Parameter (EDP) was selected to be the maximum interstorey drift. Results were obtained for various representative design parameters defined with respect to sizes and reinforcement of the shear walls of the structure. These designs were assessed in terms of vulnerabilities, i.e the previously mentioned target probabilities of exceeding various performance levels. At each step of the proposed design approach vulnerability curves are derived using the method of coefficients (ATC-40). This methodology is also compared to vulnerability curves obtained with Incremental Dynamic Analysis (IDA) and it is found that ATC-40 provides more conservative results.

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