염해 환경하의 철근콘크리트 구조물의 친환경 내구설계 시스템 개발에 관한 연구

Abstract

This study was suggested to develop sustainable durability design system and proposed the plan to evaluate design conditions that meet the intended service life and LCCO_2 reduction level of reinforced concrete structure easily from the early design stage. For that the W/B and covering depth of the concrete structure were calculated through calculation of service life based on standard specification expression and the quantitative reduction rate of the vertical member of reinforced concrete structure by the calculated W/B was applied. Life cycle of building classified into construction stage, operation stage, maintenance stage, and demolition/disposal stage and the method of CO_2 evaluation of each stage was proposed. For construction stage, the major construction materials that take up over 80% CO_2 emitting during building construction were selected and the CO_2 evaluation method for 5 standard apartment houses was proposed. Also, for operation stage, CO_2 emission was calculated through calculation of heating load by energy efficiency rating certification system. For maintenance stage, CO_2 emission was calculated using concept of re-construction by life and for demolition/disposal stage was calculated with the use of construction standard estimate. As a result of the case study by such evaluation methods, 80 years of service life and 17 specifications of sustainable durability design that meet the 40% intended LCCO_2 reduction level were deduced. The Maximum LCCO_2 reduction rate was analyzed by 47.2%.