Multi-objective sustainable design model for integrating CO2 emissions and costs for slabs in office buildings

Min Gyu Lee, Jung Hwan An, Sang Geun Bae, Hyung Seok Oh, Jewoo Choi, Da Yo Yun, Taehoon Hong, Dong Eun Lee, Hyo Seon Park

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


Composite beams comprising concrete slabs supported by steel beams typically constitute more than 70% of the total volume of the structure of an office building. Little, if any, research has been conducted regarding the design and construction of a floor system that successfully accounts for eco-friendliness. To remedy this, an optimal sustainable design model for composite beams (OSDMCB) has been developed. The proposed OSDMCB was used to analyse the relationship between CO2 emissions and costs required for the construction of concrete slabs supported by steel beams composed of four different materials: concrete, steel frame, rebar, and a shear connector. To verify the performance of the OSDMCB, it was applied to the design and construction of composite beams in a 30-story office building. When both costs and CO2 emissions are simultaneously minimised, the composite beam of the OSDMCB, compared with a composite beam without the OSDMCB, reduces the costs and CO2 emissions by 6.23% and 4.07%, respectively.

Original languageEnglish
Pages (from-to)1096-1105
Number of pages10
JournalStructure and Infrastructure Engineering
Issue number8
Publication statusPublished - 2020 Aug 2

Bibliographical note

Funding Information:
This work was supported by the National Research Foundation of Korea (NRF), grant funded by the Korean Government Ministry of Science, ICT and Future Planning (MSIP) [grant numbers 2011-0018360 and 2018R1A5A102513].

Publisher Copyright:
© 2019, © 2019 Informa UK Limited, trading as Taylor & Francis Group.

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Building and Construction
  • Safety, Risk, Reliability and Quality
  • Geotechnical Engineering and Engineering Geology
  • Ocean Engineering
  • Mechanical Engineering


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