A new approach to assessing reparability for seismic risk assessment of buildings

Abstract

Advanced performance-based earthquake engineering (PBEE), as documented by FEMA P-58 provisions, can well serve as the bedrock for a building-specific risk assessment framework. The methodology embraces three main sequential steps: collapse assessment, irreparability assessment, and component-wise loss estimation. The consequence of collapse or irreparability is typically assumed to be the total replacement value of the building. The irreparability model adopted by FEMA P-58 uses the residual drift of the building as the sole predictor. This article proposes a new irreparability prediction model tailored for the PBEE that is distinct because of two main features: (1) the monetary loss as a performance metric is chosen to inform the irreparability, enabling incorporation with the influence of different contributing factors, and (2) irreparability assessment is decoupled from the main body of the loss assessment and included as the post-loss analysis decision-making. Eventually, the proposed irreparability model called “post-loss analysis irreparability model (PLAIM)” is demonstrated through an illustrative example of a four-story wood light-frame building.

Assessing the Impact of Ground Motion Duration on Losses in Typical Modern Steel Moment Frames

“…The parameters associated with the repairability model were set to L m = n. 2000 USD, λ D = n. 7000 USD day , and RCV T = n. 504000 USD, where n represents the number of stories, L m is miscellaneous indirect losses, λ D is the daily downtime loss, and RCV T is indirect replacement cost. Refer to [43] for more details. The direct replacement cost of the building was predicted based on the maximum repair cost obtained from the corresponding consequence functions.…”

A framework for assessing impaired seismic performance as a trigger for repair

“…The researchers applied this methodology to a municipality in Italy to determine the effect of repair and retrofit thresholds on the safety of the entire building stock. Safiey and Pang 10 likewise proposed a performance‐based earthquake engineering model to consider irreparibility (i.e., damage to the structure that cannot be remediated). They account for both endogenous (building characteristics, such as structural system and building size) and exogenous (insurance, legislation, etc.)…”