Civil and Environmental Engineering Departmental Seminar: Performance-Based Engineering: From Earthquakes to Durability and Multi-Hazards

Seminar | March 6 | 10-11 a.m. | 542 Davis Hall

 Madeleine Flint

 Civil and Environmental Engineering (CEE)

Responding to engineering challenges of the magnitude created by climate change requires bridging disciplinary divides in assessing structural performance. The PEER framework for performance-based earthquake engineering (PBEE) is one example of a decision-oriented approach that combines efficient treatment of uncertainty with advanced models for structural performance. In addition to influencing practice, design codes, and earthquake engineering research, the PEER framework has motivated the development of analogous frameworks for several hazards, including fire, wind, hurricane, and scour. While these adaptations of the PEER framework have contributed many new ideas, they have also, in some cases, violated fundamental assumptions necessary to the validity of PBE.

The development of a framework for performance-based durability engineering (PBDE) required the derivation from fundamentals of a new approach to accommodate the gradual process of deterioration. The framework is novel in the durability engineering field in its full consideration of uncertainty over a structural lifespan from initial climate analyses to final impact analyses. Building on lessons learned in the development of PBDE, a proposed framework for multi-hazard PBE can accommodate interdependencies between deterioration (related to exposure or hazard-induced damage) and structural performance. While current efforts in the development of multi-hazard PBE are focused on the framework’s application to individual buildings, future efforts are envisioned to broaden its scope, e.g., to regional-scale analyses of bridges subjected to both extreme events such as floods and routine degradation mechanisms such as scour.

Topics covered will include the derivation of the durability and multi-hazard frameworks, and research questions that arise in PBE at the intersection of analysis stages. In particular, studies of methods for selecting appropriate meteorological time-series when using multi-physics deterioration models in PBDE, and the selection of appropriate intensity measures in PBEE using quantitative metrics for sufficiency and efficiency, will be discussed.

 leorig@berkeley.edu