Performance-Based Seismic Design In Real Life: The Good, The Bad And The Ugly

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Performance-Based Seismic Design In Real Life: The Good, The Bad And The Ugly
Dimitrios Vamvatsikosa
a School of Civil Engineering, National Technical University, Athens, Greece
Keywords: Performance, seismic design, hazard, risk, behavior factor
TRAILER
Designing a structure to deliver the desired performance under the uncertainties of hazard, materials and
questionable models, is largely the Holy Grail of earthquake engineering. A number of methods have appeared in
the literature claiming to offer this coveted prize, yet, in my very own opinion, they may require heavy
computations or strict assumptions, sometimes offering a useful but partial solution, perhaps delivering something
other than what the user expected, or even failing to deliver altogether. This does not necessarily detract from the
usefulness of each method, but it does certainly mean that some differentiation among approaches should be
maintained, despite all of them being bundled underneath the moniker of “performance-based”. Therefore, due to
my heavy exposure to spaggeti westerns from a very young and tender age, my eternal fascination with the work of
Sergio Leone and Ennio Morricone, and my desire to pay tribute to the shining geniuses that defined my childhood
cosplay days, let me introduce to you what I consider to be il buono, il brutto e il cattivo of performance-based
seismic design approaches. And like any good film, I am afraid you will have to read this paper to its conclusion to
figure out which is which. I hope you enjoy it.

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