An Analysis of the CO2 Reduction Effect of a Column-Beam Structure Using Composite Precast Concrete Members

Abstract

Over the past 30 years, Korea has adopted structural frames with bearings for apartment buildings. The unit planning flexibility of such a structural system is inadequate, when compared to the column-beam system. The system would allow renovation easily and would provide various other legal benefits to constructors in Korea. For this reason, a column-beam system, named by green frame (GF), implemented with composite precast concrete (PC) members was previously developed. However, since the scheme would require a performance improvement to increase its economic effects and constructability, a further improved system has been developed. In the case of structural construction, it is a construction process that emits the most CO2. Along with the constructability and economic feasibility of a construction system, a reduction in CO2 is also critical. The purpose of this paper was to analyze the CO2-reduction effect of the improved system constructed with enhanced composite PC members. The improved system would greatly contribute to CO2 reduction with an average of 25.0% as compared with the bearing wall structure; and 2.8% compared to the existing GF.