Korean Journal of Spatial Architecture (한국대공간건축 논문집)

Korean Association for Spatial Structures (한국공간구조학회)
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Structural Peformance Analysis of Microalgae-Based Lightweight Bio-Integrated System for Large-span Structures toward Carbon Neutral

탄소중립 실현을 위한 대공간 구조물의 미세조류 기반 경량 생태융합 시스템 구조성능 분석

  • Lee, Seung-Jung (Dept. of Environmental Engineering, Kunsan National University) ;
  • Park, Sang-Hun (Corporate Research Institute of Architecture & Eco-friendly Convergence, UooChang E&C Co., Ltd) ;
  • Kim, Seong-Cheon (Dept. of Environmental Engineering, Kunsan National University) ;
  • Lee, Ho-Seong (Dept. of Intelligent Information Integration Engineering, Jeonbuk National University) ;
  • Kim, Myung-Jun (Dept. of Environmental Engineering, Kunsan National University) ;
  • Kim, Gwang-Soo (Dept. of Environmental Engineering, Kunsan National University) ;
  • Seo, Kyung-Mi (Dept. of Environmental Engineering, Kunsan National University) ;
  • Park, Hyeon-Ku (Dept. of Architectural Engineering, Songwon University)
  • 이승중 (군산대학교 환경공학과) ;
  • 박상훈 ((주)유창 E&C) ;
  • 김성천 (군산대학교 환경공학과) ;
  • 이호성 (전북대학교 지능정보융합공학과) ;
  • 김명준 (군산대학교 환경공학과) ;
  • 김광수 (군산대학교 환경공학과) ;
  • 서경미 (군산대학교 환경공학과) ;
  • 박현구 (송원대학교 건축공학과)
  • Received : 2025.08.25
  • Accepted : 2025.09.04
  • Published : 2025.09.15
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Abstract

This study analyzed the structural performance of a microalgae-based lightweight ecological integration system for large-span structures to achieve carbon neutrality. To address the load problems of existing soil-based ecological systems, a lightweight system utilizing microalgae bioreactors was proposed, and structural performance was evaluated for four types of large-span structures: truss, arch, dome, and cable structures. Structural analysis results through finite element analysis showed that the proposed system achieved a 70% load reduction effect compared to existing systems, with structural performance improvements including 35-40% reduction in maximum deflection, 30-35% reduction in maximum stress, and 25-30% increase in natural frequency. Environmental performance analysis confirmed CO2 absorption capacity of 12-18 kg per m2 annually and PM2.5 reduction effects of 15-25%. Economic analysis results indicated that benefits of 3.95-6.7 million KRW per year are generated for a 1,000 m2 reference area, creating cumulative benefits of 179.75-227.5 million KRW over 25 years. Verification through the German BIQ House case confirmed CO2 reduction performance of 6 tons per year for 200 m2, demonstrating the practical applicability of the system. This study presented the potential of an innovative ecological integration system that can ensure structural safety of large-span structures while simultaneously contributing to carbon neutrality.

Keywords

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