A Study on the Development of Sustainable Durability Design Method in Apartment Houses with Assessments of Life Cycle $CO_2$

전과정 $CO_2$ 평가를 통한 공동주택의 친환경내구설계 기법 개발에 관한 연구

To alleviate global warming effect, apartment house with long life spans have gained attention due to their ability to conserve resources and reduce $CO_2$ emissions. The purpose of the study was to develop a Sustainable Durability Design method that can quantitatively evaluate $LCCO_2$ emissions based on the durability life of apartment buildings in the early design phase. To compute $CO_2$ emissions as a function of the durability life, the durability life was determined using the durability chapter of Korea Concrete Standard Specifications, computed W/B, and thickness of concrete cover. The life cycle of the building was divided into 4 phase. For the construction phase, major $CO_2$-emitting construction materials were selected, and $CO_2$ assessment plans for 5 standard apartment housings were proposed. For the operation phase, $CO_2$ emissions were computed using the heating load calculation. For the maintenance and management phase, maintenance methods were selected according to the durability life, and $CO_2$ emissions from repair materials for each maintenance method were computed. For the disposal phase, individual $CO_2$ emissions were computed using the Standard Quantities As a result, design specifications that satisfy specific target durability life and target reductions in $LCCO_2$ were selected in the early design phase. In addition, by conducting a case analysis, 36 design specifications were selected to obtain a durability life of 100 years and a reduction in $LCCO_2$ emission of 40%.