The consideration of environmental losses in seismic design is discussed within the framework of cost optimization analysis. Within this context, the equivalent carbon emissions (CO2-e) are used as a proxy for the environmental cost related to seismic damage, and a model to assess the environmental cost in seismic loss estimation is introduced. The use of the model is illustrated through its application to the analysis of simple earthquake-resistant structural systems. It is concluded that under certain circumstances, the consideration of environmental issues in seismic design may be important, especially as the planning time horizon of the facility increases.

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