Report - PEER - University of California, Berkeley

functions for a wide variety of nonstructural components of significance that can beused with confidence to predict performance.3.5 Development of Framework to Adjust Generalized Fragility/LossFunctionsOvertime it is expected that many more fragility and loss functions will becomeavailable for individual nonstructural components. This task will provide a frameworkand associated procedures for adjusting the generalized fragility and loss functionsdeveloped in Task 2 above to account for newly available functions. The proceduremay take the form of explaining how to subtract on the component of interest fromthe generalized functions and perhaps having the individual component or system ofinterest separately identified in the aggregation. This would permit a betterunderstanding of the key limiters of performance through deaggregation.3.6 Document Performance Assessment Procedures and Provide ExamplesThe final task of the performance assessment phase of this project is to document andthe performance assessment procedure. The documentation would cover the fullscope of the project including defining the ground motion hazard, structural andnonstructural assessment, development of loss functions and loss aggregation andother decision information needed by decision makers to make informed decisions. Itis expected that the documentation may include the step-by-step process that anengineer would need to follow in order to do a performance assessment. It would alsoinclude commentary and provide background material on the procedure development.Also examples would be provided that would illustrate the use of the procedures.4. SUMMARYThe ATC-58 guidelines have the potential to revolutionize the practice ofperformance-based design for nonstructural components when the project iscompleted. Nonstructural components while well recognized as the dominatingcontributor to losses in recent earthquakes and a major contributor to downtime losseshave not received serious attention in previous performance–based earthquakeengineering guideline development. With the attention provided to nonstructuralcomponents in this project along with the use of probabilistic structural reliabilitytechniques, the likely-hood that performance-based designs will actually achieveintended performance should greatly improve. More importantly, decision makerswill be provided information that will be directly useful in selecting appropriateperformance criteria for building design, nonstructural design and upgrade projects.135