TY - JOUR
T1 - Comprehensive investigation of embodied carbon emissions, costs, design parameters, and serviceability in optimum green construction of two-way slabs in buildings
AU - Oh, Byung Kwan
AU - Glisic, Branko
AU - Lee, Seol Ho
AU - Cho, Tongjun
AU - Park, Hyo Seon
N1 - Funding Information:
This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government Ministry of Science, ICT & Future Planning (MSIP) (No. 2011-0018360 and No. 2018R1A5A1025137 ).
PY - 2019/6/10
Y1 - 2019/6/10
N2 - This paper presents an optimum design model for the green construction of reinforced concrete two-way slabs in buildings. The model was applied to various design cases of two-way slabs in residential, office, and commercial buildings to derive designs that minimize environmental impact. The sustainability and economic feasibility of the derived designs were extensively compared with those of the conventional design method in relation to the material composition of concrete and steel in slabs, design parameters, and dominant design factors. As compared to the conventional design method, the optimum sustainable design method achieved average CO 2 emission reductions of 4.94%, 11.40%, and 19.96% for residential, office, and commercial buildings, respectively, for all design cases considered in this study. Moreover, a multi-objective optimum design method that could simultaneously minimize embodied carbon emissions, cost, and vibration responses was created to consider the serviceability for vibrations induced by human activity in buildings. The design method was applied for the design cases of slabs in residential and office buildings, which are sensitive to human-induced vibrations. A design with increased concrete strength was derived to satisfy vibration criteria in the case of a residential building. This resulted in an increase of 8.89% in embodied carbon emissions compared with the conventional design method. On the contrary, in the case of an office building, the derived design showed a reduction of 15.79% in embodied carbon emissions while satisfying vibration criteria.
AB - This paper presents an optimum design model for the green construction of reinforced concrete two-way slabs in buildings. The model was applied to various design cases of two-way slabs in residential, office, and commercial buildings to derive designs that minimize environmental impact. The sustainability and economic feasibility of the derived designs were extensively compared with those of the conventional design method in relation to the material composition of concrete and steel in slabs, design parameters, and dominant design factors. As compared to the conventional design method, the optimum sustainable design method achieved average CO 2 emission reductions of 4.94%, 11.40%, and 19.96% for residential, office, and commercial buildings, respectively, for all design cases considered in this study. Moreover, a multi-objective optimum design method that could simultaneously minimize embodied carbon emissions, cost, and vibration responses was created to consider the serviceability for vibrations induced by human activity in buildings. The design method was applied for the design cases of slabs in residential and office buildings, which are sensitive to human-induced vibrations. A design with increased concrete strength was derived to satisfy vibration criteria in the case of a residential building. This resulted in an increase of 8.89% in embodied carbon emissions compared with the conventional design method. On the contrary, in the case of an office building, the derived design showed a reduction of 15.79% in embodied carbon emissions while satisfying vibration criteria.
KW - Embodied carbon emissions
KW - Green construction
KW - Human-induced vibration in building
KW - Optimal design
KW - Sustainable slab design
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U2 - 10.1016/j.jclepro.2019.03.003
DO - 10.1016/j.jclepro.2019.03.003
M3 - Article
AN - SCOPUS:85063113090
SN - 0959-6526
VL - 222
SP - 111
EP - 128
JO - Journal of Cleaner Production
JF - Journal of Cleaner Production
ER -