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From page 1...
... SUMMARY PERFORMANCE-BASED SEISMIC BRIDGE DESIGN Currently, bridge seismic design specifications in the United States are based on prescriptive design methodologies that only marginally relate important design parameters to the performance of a bridge during an earthquake. With the current specifications, the designer does not directly control the seismic performance of bridges.
From page 2...
... 2 tent basis for engineers to use for projects where PBSD makes sense. Typically, these would be large and important projects.

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