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Practical Framework for Risk-Informed Performance-Based Seismic Design Ensuring Building Functionality
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DOI：10.1002/2475-8876.70070.png)
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Abstract
En 中文
This study presents a practical framework for risk-informed seismic design that positions building functionality as a primary design objective and incorporates interdependencies among components into design decision-making. Existing approaches, such as FEMA P-58 and the REDi guidelines, acknowledge that functionality depends on multiple components and their interdependencies, but primarily address these relationships within evaluation models. In contrast, this paper elevates interdependencies to controllable design variables during the design phase, while maintaining consistency with Japanese design standards, thereby enabling designers to effectively improve building functionality. Furthermore, building upon the traditional concept of strength-based design, the proposed framework adopts vulnerability-based risk assessment by representing component design capacities as damage probabilities, advancing toward probabilistic performance evaluation. This approach links design choices to actual performance, allowing adjustments in redundancy and equipment layout. Functionality State (FS) curves are introduced to quantify the probability of achieving target functionality under seismic demands, supporting the setting and verification of design objectives. By directly integrating risk assessment into design decisions and embedding dependency structures within the design process, the framework enhances post-earthquake functionality and resilience, providing a transparent basis for decision-making and establishing a foundation for incorporating functionality into seismic design.
Keywords:
building functionality loss
frailty curve
incremental dynamic analysis
probabilistic approach
risk-informed performance-based seismic design