Quantifying and Mitigating Carbon Emissions in Long-Span Steel Bridge Construction: Lessons from the Anhsin Bridge in the Ankeng MRT System
長大鋼橋建設における炭素排出の定量化と緩和：安坑MRTシステム安進橋からの教訓 (AI 翻訳)
Tai-Yi Liu, Juintow Lin, S. Ho, N. Chou, Chia-Cheng Lee
🤖 gxceed AI 要約
日本語
本研究は台湾の安進橋を対象に、建設段階のカーボンフットプリントをISO 14067準拠の排出係数法で評価した。総排出量55,349 tCO2eのうち構造用鋼が51.8%を占め、材料由来が90%超を占めた。3つの緩和策（セメント代替、鋼材建方最適化、型枠再利用）の組み合わせで7.3%削減可能と示した。
English
This study quantifies the construction-stage carbon footprint of the Anhsin Bridge in Taiwan using the emission factor method per ISO 14067. Total emissions of 55,349 tCO2e are dominated by structural steel (51.8%), with material-related emissions over 90%. Three mitigation strategies (cement substitution, optimized steel erection, formwork reuse) achieve a combined 7.3% reduction.
Unofficial AI-generated summary based on the public title and abstract. Not an official translation.
📝 gxceed 編集解説 — Why this matters
日本のGX文脈において
日本の鋼橋建設においても、材料選択が建設段階排出量の大部分を占めることが示唆されており、SSBJに関連したサプライチェーン排出削減策として参考になる。台湾の事例であるが、日本のゼネコンや鉄鋼メーカーにも応用可能な知見を含む。
In the global GX context
This paper provides empirical emissions data and practical mitigation strategies for steel-intensive bridge construction, relevant to global infrastructure carbon accounting and disclosure frameworks like ISSB and TCFD. It highlights the dominance of embodied carbon in construction materials, offering actionable insights for reducing scope 3 emissions in the built environment.
👥 読者別の含意
🔬研究者:Provides empirical emissions factors and mitigation effectiveness for steel bridge construction, useful for carbon accounting methodology development.
🏢実務担当者:Offers constructability-aware strategies (cement substitution, steel erection optimization) that can be directly applied to reduce embodied carbon in steel bridge projects.
🏛政策担当者:Demonstrates the impact of material selection on infrastructure emissions, supporting policies that promote low-carbon procurement and construction standards.
📄 Abstract（原文）
Construction materials are the primary source of embodied carbon in long-span bridge projects, particularly for steel-intensive structures. This study presents an empirical construction-stage carbon footprint assessment of the Anhsin Bridge, an asymmetric cable-stayed steel truss bridge in Taiwan. Using the emission factor method in accordance with ISO 14067 and Taiwan Environmental Protection Administration guidelines, a cradle-to-gate (A1–A5 equivalent) system boundary was applied, covering material production, transportation, and on-site construction activities. Total construction-stage emissions were estimated at 55,349 tCO2e, dominated by structural steel (51.8%), followed by reinforcing steel, concrete, and cement. Material-related emissions accounted for over 90% of the total, highlighting the critical role of material selection in embodied carbon reduction. Three practical mitigation strategies were evaluated using verified project data, as follows: 40% cement substitution with supplementary cementitious materials, optimized steel erection methods, and enhanced reuse of formwork and temporary works. The combined scenario achieved a 7.3% reduction in construction-stage emissions without compromising constructability. The findings demonstrate the effectiveness of material-oriented, constructability-aware strategies for reducing embodied carbon in steel-intensive bridge construction.
🔗 Provenance — このレコードを発見したソース
- semanticscholar https://doi.org/10.3390/constrmater6020020first seen 2026-06-29 06:38:47
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