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Probabilistic lifecycle analysis of earthquake-damaged buildings using building information models

University of British Columbia

This dissertation presents models and methods for the lifecycle analysis of buildings. Detailed models are developed that are associated with constructing, operating, repairing, and demolishing buildings. These models address an array of direct and indirect concerns, including impacts from the repair of earthquake damage. In support of cost-based decision making, a host of cost models are implemented to translate lifecycle impacts into monetary costs. The significant uncertainty in predicting earthquake hazards, material behaviour, and future costs is addressed through probabilistic modelling. The models in this dissertation are underpinned by a new library of building components. The components contain finite elements, built-in functionality, and information required for lifecycle analysis. These information-rich building components are created from building information models, or BIMs, with algorithms that are implemented in this dissertation. Methods are presented for generating a structural model from the components, and a correlation structure is developed for random variables that are created within these components. A novelty of this work is a seismic loss estimation methodology that is based on visual damage. Models are developed that predict visual damage from the responses of high- fidelity finite element models. A new damage mesh discretizes building components into damage regions where the stresses and strains are expected to influence the damage at the surface. Resembling the approach of a repair estimator, arrays of repair actions are described for different types and extents of visual damage. The repair actions are paired with a construction database to provide enriched estimates of the repair cost and duration. The new models and methods are applied to a six-storey building in order to gain new insights into the repair of earthquake damage. The building is subjected to earthquake ground motions, where it is demonstrated that the ground shaking duration, and the damage accumulated during the initial part of the shaking, influence the subsequent repairs. Next, several lifecycle analyses are performed, and wood, concrete, and steel material options are compared for the structural system. Results show that wood is the better option from a broader societal perspective.

Text

2020-08-14

Attribution-NonCommercial-NoDerivatives 4.0 International

http://hdl.handle.net/2429/75542

Civil Engineering

University of British Columbia

UBCV

http://creativecommons.org/licenses/by-nc-nd/4.0/