Optimization framework for cost and carbon emission of timber floor elements

Sveinung Nesheim; Kristo Mela; Kjell Arne Malo; Nathalie Labonnote

doi:10.1016/j.engstruct.2021.113485

Optimization framework for cost and carbon emission of timber floor elements

Sveinung Nesheim^*
, Kristo Mela
, Kjell Arne Malo
, Nathalie Labonnote

^*Corresponding author for this work

Civil Engineering

Research output: Contribution to journal › Article › Scientific › peer-review

13 Citations (Scopus)

47 Downloads (Pure)

Abstract

Long-span timber floor elements increase the adaptability of a building and they exhibit a significant market potential. High cost of the floor elements is a challenge, and the timber sector is under substantial pressure to find more economical solutions without weakening otherwise favourable environmental performance. The range of technical timber-based materials and components, structural typologies, overlays and ceiling systems represent an immense solution space when searching for a competitive design for a specific building application. Finding the optimum solution requires a computational procedure. In this study a recent development for the accounting of manufacturing resources for timber elements is utilized to build an optimization framework for cost and ECO2 minimisation of timber floor elements finalized at the factory gate. The design of the element is formulated as a discrete optimization problem which is solved by a mixed-integer sequential linearization procedure. Various material combinations and constraint combinations are treated. The optimization framework provides a tool for rapid design exploration that can be used in timber floor design situations. The results of the calculations carried out in this study provide insight on the general trends of optimum floor elements. The optimization model is used to analyse the characteristics of the optimum designs, and a comparison between the current and the proposed method for the second generation of Eurocode 5 is chosen as a vehicle for demonstrating achievable implications.

Original language	English
Article number	113485
Journal	Engineering Structures
Volume	252
Early online date	29 Nov 2021
DOIs	https://doi.org/10.1016/j.engstruct.2021.113485
Publication status	Published - 1 Feb 2022
Publication type	A1 Journal article-refereed

Funding

This work is part of the four-year project ?Woodsol ? Wood frame solutions for free space design in urban buildings? realized through the research grant from The Research Council of Norway (254699/E50). The support is gratefully acknowledged. The authors would also like to acknowledge the contribution by Jaakko Huusko (formerly Tampere University) for the support on implementation of the computer code. This work is part of the four-year project “Woodsol – Wood frame solutions for free space design in urban buildings” realized through the research grant from The Research Council of Norway (254699/E50). The support is gratefully acknowledged. The authors would also like to acknowledge the contribution by Jaakko Huusko (formerly Tampere University) for the support on implementation of the computer code.

Keywords

Carbon emission reduction
Cost optimization
Eurocode 5
Timber floor

Publication forum classification

Publication forum level 3

ASJC Scopus subject areas

Civil and Structural Engineering

Access to Document

10.1016/j.engstruct.2021.113485Licence: CC BY

1-s2.0-S0141029621015881-main-1Final published version, 5.72 MBLicence: CC BY

https://urn.fi/URN:NBN:fi:tuni-202201241569Licence: CC BY

Cite this

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title = "Optimization framework for cost and carbon emission of timber floor elements",

abstract = "Long-span timber floor elements increase the adaptability of a building and they exhibit a significant market potential. High cost of the floor elements is a challenge, and the timber sector is under substantial pressure to find more economical solutions without weakening otherwise favourable environmental performance. The range of technical timber-based materials and components, structural typologies, overlays and ceiling systems represent an immense solution space when searching for a competitive design for a specific building application. Finding the optimum solution requires a computational procedure. In this study a recent development for the accounting of manufacturing resources for timber elements is utilized to build an optimization framework for cost and ECO2 minimisation of timber floor elements finalized at the factory gate. The design of the element is formulated as a discrete optimization problem which is solved by a mixed-integer sequential linearization procedure. Various material combinations and constraint combinations are treated. The optimization framework provides a tool for rapid design exploration that can be used in timber floor design situations. The results of the calculations carried out in this study provide insight on the general trends of optimum floor elements. The optimization model is used to analyse the characteristics of the optimum designs, and a comparison between the current and the proposed method for the second generation of Eurocode 5 is chosen as a vehicle for demonstrating achievable implications.",

keywords = "Carbon emission reduction, Cost optimization, Eurocode 5, Timber floor",

author = "Sveinung Nesheim and Kristo Mela and Malo, \{Kjell Arne\} and Nathalie Labonnote",

note = "Funding Information: This work is part of the four-year project ?Woodsol ? Wood frame solutions for free space design in urban buildings? realized through the research grant from The Research Council of Norway (254699/E50). The support is gratefully acknowledged. The authors would also like to acknowledge the contribution by Jaakko Huusko (formerly Tampere University) for the support on implementation of the computer code. Funding Information: This work is part of the four-year project “Woodsol – Wood frame solutions for free space design in urban buildings” realized through the research grant from The Research Council of Norway (254699/E50). The support is gratefully acknowledged. The authors would also like to acknowledge the contribution by Jaakko Huusko (formerly Tampere University) for the support on implementation of the computer code. Publisher Copyright: {\textcopyright} 2021 The Authors",

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N1 - Funding Information: This work is part of the four-year project ?Woodsol ? Wood frame solutions for free space design in urban buildings? realized through the research grant from The Research Council of Norway (254699/E50). The support is gratefully acknowledged. The authors would also like to acknowledge the contribution by Jaakko Huusko (formerly Tampere University) for the support on implementation of the computer code. Funding Information: This work is part of the four-year project “Woodsol – Wood frame solutions for free space design in urban buildings” realized through the research grant from The Research Council of Norway (254699/E50). The support is gratefully acknowledged. The authors would also like to acknowledge the contribution by Jaakko Huusko (formerly Tampere University) for the support on implementation of the computer code. Publisher Copyright: © 2021 The Authors

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N2 - Long-span timber floor elements increase the adaptability of a building and they exhibit a significant market potential. High cost of the floor elements is a challenge, and the timber sector is under substantial pressure to find more economical solutions without weakening otherwise favourable environmental performance. The range of technical timber-based materials and components, structural typologies, overlays and ceiling systems represent an immense solution space when searching for a competitive design for a specific building application. Finding the optimum solution requires a computational procedure. In this study a recent development for the accounting of manufacturing resources for timber elements is utilized to build an optimization framework for cost and ECO2 minimisation of timber floor elements finalized at the factory gate. The design of the element is formulated as a discrete optimization problem which is solved by a mixed-integer sequential linearization procedure. Various material combinations and constraint combinations are treated. The optimization framework provides a tool for rapid design exploration that can be used in timber floor design situations. The results of the calculations carried out in this study provide insight on the general trends of optimum floor elements. The optimization model is used to analyse the characteristics of the optimum designs, and a comparison between the current and the proposed method for the second generation of Eurocode 5 is chosen as a vehicle for demonstrating achievable implications.

AB - Long-span timber floor elements increase the adaptability of a building and they exhibit a significant market potential. High cost of the floor elements is a challenge, and the timber sector is under substantial pressure to find more economical solutions without weakening otherwise favourable environmental performance. The range of technical timber-based materials and components, structural typologies, overlays and ceiling systems represent an immense solution space when searching for a competitive design for a specific building application. Finding the optimum solution requires a computational procedure. In this study a recent development for the accounting of manufacturing resources for timber elements is utilized to build an optimization framework for cost and ECO2 minimisation of timber floor elements finalized at the factory gate. The design of the element is formulated as a discrete optimization problem which is solved by a mixed-integer sequential linearization procedure. Various material combinations and constraint combinations are treated. The optimization framework provides a tool for rapid design exploration that can be used in timber floor design situations. The results of the calculations carried out in this study provide insight on the general trends of optimum floor elements. The optimization model is used to analyse the characteristics of the optimum designs, and a comparison between the current and the proposed method for the second generation of Eurocode 5 is chosen as a vehicle for demonstrating achievable implications.

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ER -

Optimization framework for cost and carbon emission of timber floor elements

Abstract

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