低炭素鉄筋コンクリート床システムの統合設計フレームワーク：スラブ形式から梁配置まで
An Integrated Design Framework for Low-Carbon Reinforced Concrete Floor Systems: From Slab Typology to Beam Configuration (原題)
Chia Paknahad
🤖 gxceed AI 要約
日本語
鉄筋コンクリート床は建物のコンクリート量の最大6割を占め、 embodied carbon削減の重要点となる。本研究はEurocode 2準拠のパラメトリック解析に基づき、スラブ形式の選択と梁配置の最適化を段階的に示す設計フレームワークを提示する。スパン別に最適解を示し、長スパンでは梁グリッド追加でembodied carbonを約11%削減できることを明らかにした。
English
RC floor systems account for up to 60% of concrete volume in multi-storey buildings, making them a key lever for embodied carbon reduction. Using Eurocode 2-compliant parametric studies, this paper presents a hierarchical design framework covering slab typology selection and beam configuration optimisation across short, medium, and long spans. It finds two-way joist slabs cut embodied carbon by 25–35% for long spans, and adding a full beam grid reduces embodied carbon by ~11% versus beamless layouts.
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
日本では建築物のライフサイクルCO2算定やCASBEE、ZEB/ZEH、住宅・建築物の脱炭素化が進む。本論文は設計初期段階での床システム選択という実務的介入点を示し、国内設計者・ゼネコンが embodied carbon を削減する際の参照枠組みとなりうる。ただしEurocode前提のため、日本基準への読み替えが必要。
In the global GX context
As global disclosure frameworks (ISSB, CSRD) push companies to report Scope 3 and embodied carbon, this paper offers a practical, span-dependent design matrix for reducing upfront carbon in concrete structures. It adds to the growing body of built-environment decarbonisation research that links design-stage decisions to measurable carbon and cost outcomes.
👥 読者別の含意
🔬研究者:床システムの形式と梁配置がembodied carbonとコストに与える影響を定量化した統合設計枠組みを提供する。
🏢実務担当者:スパン別の設計マトリクスを用い、概念設計段階で低炭素かつ低コストな床形式を選択できる。
🏛政策担当者:建築物のライフサイクル炭素規制や設計ガイドライン策定の際、床システムの選択肢を考慮する根拠となる。
📄 Abstract（原文）
Reinforced concrete floor systems account for up to 60% of total concrete volume in multi-storey buildings and represent a critical intervention point for embodied carbon reduction. While previous research has examined individual slab typologies or isolated design parameters, integrated guidance spanning both system selection and configuration optimisation remains limited. This paper presents a hierarchical decision framework for low-carbon RC floor design, synthesising results from two Eurocode 2–compliant parametric studies of a representative 3 × 3 bay reinforced concrete frame typical of multi-storey office buildings, using C32/40 concrete across three span bands: short (4–6 m), medium (8–10 m), and long (12–14 m). The framework operates at two sequential levels: (i) selection of slab typology, where flat slabs are most efficient for short spans while two-way joist slabs reduce embodied carbon by 25–35% and cost by up to about 35% for long spans; and (ii) configuration of beams within the two-way joist system, where beamless layouts are optimal for short spans and full-beam grids outperform alternatives for long spans. Results show that for short spans the flat slab without beams is the most efficient solution, for medium spans the two-way joist slab without beams provides the best balance of embodied carbon and cost, and for long spans the two-way joist slab with a full beam grid is optimal; adding a full beam grid reduces embodied carbon by approximately 11% compared with the beamless alternative at the longest spans. The combined guidance is presented as a span-dependent design matrix, offering practising engineers actionable recommendations at the concept-design stage and supporting decarbonisation targets in the built environment.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.36828/efs.412first seen 2026-09-14 04:41:44
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